`Olson et al.
`
`CACO AUNAA
`US005307976A4-
`[11] Patent Number:
`[45] Date of Patent:
`
`5,307,976
`May3, 1994
`
`[54] LINEAR STAPLING MECHANISM WITH
`CUERING MEANS
`
`[56]
`
`{75]
`
`+
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`Inventors: Todd Olson, Loveland; Dan Meiser,
`vee 227/19
`7/1988 Barker etal. ..
`4,754,909
`
`Oxford; Gary Steed, Cleves; Eric
`227/19 x
`4,784,137 11/1988 Kulik et al.
`:
`:
`227/19 X
`1/1990 Fox etal. ...
`4,892,244
`Huffman, Loveland; Matthew Otten.
`ae
`Ces
`5
`7
`ee a :
`9/1990 Tompkins et al.
`.
`«. 227/180 X
`4,955,959
`
`Cincinnati; Ronald VanOverloop,
`8/1991 Green et al.
`27/8 X
`5.040.715
`West Chester: Darrel Powell,
`227/19 X
`5,071,052 12/1991 Rodak ....
`
`Cincinnati; Thomas Knodell,
`a 227/19 X
`5,170,925 12/1992 Madden..
`Loveland; Edward Rhad, Fairfield;
`:
`.
`.
`:
`Ralph Chen, Cincinnati; Robert Cook, pam Examiner—Rinaldi Rada
`5‘
`West Chester,all of Ohio
`trorney, Agent, or Firm—Paul A. Coletti
`(57]
`ABSTRACT
`A stapler mechanism is described which contains a
`stapling assembly, and anvil assembly, firing means and
`knife means. These means are activated by a firing trig-
`ger. The anvi] assembly is closed upon the stapling
`assembly by means of a closure trigger. The firing trig-
`ger is inoperable until the closure trigger has been acti-
`vated. Another mechanism in the stapler is capable of
`a
`.
`locking the closuretrigger after use so it does not spring
`Related U.S. Application Data
`
`{63]|Continuation-in-part of Ser. No. 779,436, Oct. 18, 1991, open inadvertently before use ofthe firing trigger. Ad-
`abandoned.
`ditionally, the stapler mechanism allows forward mo-
`tion of both triggers and also is capable of allowing
`
`Inte@l? caceesertasmenannaninemns A61B 17/072
`reverse motion of the closure trigger to open the mech-
`(80)
`
`ws 227/1785 227/19;
`[52] U.S. Cl...
`anism.
`227/180
`[58] Field of Search wc 227/19, 180, 176, 178
`
`{73] Assignee:
`
`Ethicon, Inc,, Somerville, N.J.
`
`[21] Appl. No.: 917,636
`
`[22] Filed:
`
`Jul. 20, 1992
`
`22 Claims, 18 Drawing Sheets
`
`
`
`Ethicon Exhibit 2016.001
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.001
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`US. Patent
`
`FIG-|
`
`May3, 1994
`
`Sheet 1 of 18
`
`5,307,976
`
`
`
`
`
`
`
`Ethicon Exhibit 2016.002
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.002
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`
`
`Sheet 2 of 18
`
`5,307,976
`
`Ethicon Exhibit 2016.003
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.003
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`Ov!
`
`EEDaagahdDEPT—Prpr191
` NaaaeagengnSaNeaeFN
`
`Sheet 3 of 18
`
`5,307,976
`
`os!
`
`Ethicon Exhibit 2016.004
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.004
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`
`
`U.S. Patent
`
`May 3, 1994
`
`Sheet 4 of 18
`
`5,307,976
`
`
`
`
`
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`Ethicon Exhibit 2016.005
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.005
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`May3, 1994
`
`5,307,976
`
`Sheet 5 of 18
`
`U.S. Patent
`
`Ethicon Exhibit 2016.006
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.006
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`U.S. Patent
`
`May 3, 1994
`
`Sheet 6 of 18
`
`. 5,307,976
`
`
`
`Ethicon Exhibit 2016.007
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.007
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 7 of 18
`
`5,307,976
`
`I92
`
`FIG-8a
`
`FIG-8
`
`Ethicon Exhibit 2016.008
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.008
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 8 of 18
`
`5,307,976
`
` 1407
`
`FIG-9a
`
`
`
`FIG-9
`
`Ethicon Exhibit 2016.009
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.009
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 9 of 18
`
`5,307,976
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`
`
`Ethicon Exhibit 2016.010
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.010
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 10 of 18
`
`5,307,976
`
`162
`
`©L
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`e
`
`f
`8
`
`Ethicon Exhibit 2016.011
`Intuitive v. Ethicon
`IPR2018-01247
`
`© ©
`
`Le
`
`Ethicon Exhibit 2016.011
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 11 of 18
`
`5,307,976
`
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`Ethicon Exhibit 2016.012
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.012
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`
`
`US, Patent
`
`May 3, 1994
`
`. 5,307,976
`
`Sheet 12 of 18
`
`FIG-12.
`
`
`
`
`
`Ethicon Exhibit 2016.013
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.013
`Intuitive v. Ethicon
`IPR2018-01247
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`
`U.S. Patent
`
`May3, 1994
`
`Sheet 13 of 18
`
`5,307,976
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`
`
`Ethicon Exhibit 2016.014
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.014
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 14 of 18
`
`5,307,976
`
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`Ethicon Exhibit 2016.015
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.015
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 15 of 18
`
`5,307,976
`
`2
`
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`Ethicon Exhibit 2016.016
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.016
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`
`U.S. Patent
`
`May3, 1994
`
`Sheet 16 of 18
`
`5,307,976
`
`
`
`
`
`FIG-18
`
`Ethicon Exhibit 2016.017
`Intuitive v. Ethicon
`IPR2018-01247
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`Ethicon Exhibit 2016.017
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S. Patent
`
`FIG-19
`
`May3, 1994
`
`Sheet 17 of 18
`
`5,307,976
`
`
`
`FIG-19a
`
`
`
`Ethicon Exhibit 2016.018
`Intuitive v. Ethicon
`IPR2018-01247
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`Ethicon Exhibit 2016.018
`Intuitive v. Ethicon
`IPR2018-01247
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`
`
`U.S, Patent
`
`May3, 1994
`
`. 5,307,976
`
`Sheet 18 of 18
`
`
`
`Ethicon Exhibit 2016.019
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.019
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`1
`
`LINEAR STAPLING MECHANISM WITH
`CUTTING MEANS
`
`5,307,976
`
`5
`
`This is a continuation in part of application Ser. No.
`07/775,436 filed Oct. 18, 1991 nowabandoned.
`FIELD OF THE INVENTION
`This invention relates generally to medical engineer-
`ing, and more specifically it relates to laparoscopic or 10
`endoscopic surgery. Mast specifically,
`it relates to a
`surgical stapling instrument which is capable of per-
`forming closures and cutting of lumen andtissue. Thisis
`accomplished in a mechanism which can be used endo-
`scopically, that is through a trocar cannula or alone, 15
`through an incision, to both staple and cut tissue.
`BACKGROUNDOF THE INVENTION
`
`In recent years surgery has markedly advanced
`through the performance of laparoscopic and endo- 20
`scopic surgical procedures such as cholecystectomies,
`gastrostomies, appendectomies, and hernia repair. Also,
`the application of endoscapic surgical stapling and su-
`turing instruments has been provided in cardiovascular
`and pulmonarysurgery, as well‘as operative inventions 25
`in the gastrointestinal tract. Such endoscopic instru-
`ments are capable of providing hemostasis and also of
`cutting tissue. This reduces operating and recuperation
`time.
`These stapling procedures are accomplished through 30
`a trocar assembly. which is a surgical instrument used to
`puncture a body cavity. The trocar contains a sharp-
`ened obturator tip and a trocar tube or cannula. The
`trocar cannula is inserted into the skin to access the
`body cavity, by using the obturator tip 10 penetrate the 35
`skin. After penetration, the obturator is removed and
`the trocar cannula remains in the body. It is through this
`cannula that surgical instruments are placed. Specifi-
`cally. it
`is through this trocar cannula that surgical
`stapling instruments with cutting mechanisms are 40
`placed. One such trocaris the Endo-path ®trocar man-
`ufactured by ETHICON ENDO-SURGERY, Cincin-
`nati. Ohio.
`Nonetheless. certain deficiencies in current concepts
`for endosurgical stapling mechanisms have been recog- 45
`nized. One of the more importantdeficiencies is the fact
`that current stapling mechanisms can not cause clamp-
`ing oftissue and firing ofthe stapler, including the knife
`mechanism, with the same position of the hand for the
`forward stroke of an actuator, such as a trigger. Thus. 50
`the user must aim the clamping mechanism to encapture
`the desirable tissue with one hand, and then, while mak-
`ing a forward trigger stroke with the opposite hand,
`cause the tissue to be stapled and cut. If the stapling
`mechanism provides a ratchet memberfor the actuator, 55
`this deficiency is really not overcome, for in such a
`mechanism there still must occur simultaneous clamp-
`ing and stapling of the tissue. Then,if it is undesirable to
`staple the tissue in that location, the trigger must be
`fully reversed. This mayresult in inadvertent jamming 60
`of the system, and in somestaplers this alternative is
`simply not capable of being performed.
`Another perceived deficiency is that no current sta-
`pling mechanisms have a safety device in place which
`prevents firing of the stapler before tissue has been 65
`clamped. Typically, the stapling mechanism may begin
`to clamptissue between an anvil jawand a stapling jaw.
`However, in someinstances, there will be firing of the
`
`-
`
`2
`is entirely
`the tissue
`stapling mechanism before
`clamped. The user may have the mechanism partially
`attached to tissue via partially expelled staples before
`the user has ascertained a desirable location of the sta-
`pler. In this way. once again, there is a certain amount
`of instability or uncertaintyin applying such a device.
`A design criteria in creating a system containing two
`separate mechanisms for clamping and firing tissue is
`the limitation of the human hand. Therefore,it is diffi-
`cult to properly and conveniently position a pair of
`triggers or a pushbutton mechanism coupled with a
`trigger mechanism. Thus, there has been little focus or
`incentive to create stapling mechanisms whereby the
`user is capable of operating a stapler with two strokes,
`unless both can be accomplished in a one-handed opera-
`tion without moving that hand from the handle of the
`instrument.
`Naturally, it would be desirable to be able to perform
`these functions in a fully rotational system. This simply
`allows the user to obtain virtually any angle of ap-
`proach to the surgical site without having to contort the
`arm or wrist in order to adequately approach the sub-
`ject.
`Also, there have been no mechanisms which provide
`opening and closure of a clamping mechanism occur-
`ring during reciprocating motion of a clamping trigger.
`What is desired would be to be able to forwardly or
`reversedly movea trigger and therebyobtain closure or
`opening.
`it would also be desirable to have distal
`Finally.
`contact of the stapling jaws, and then proximal clamp-
`ing. In this way, once distal contact is effectuated, the
`surgeon realizes and can actually visualize the amount
`of tissue clamped between the jaws. Bydistal contact is
`meantthat the distal or far end of the anvil seats first on
`the gap spacing pin or cartridge. Without such distal
`contact, the surgeon maystill be uncertain about the
`amountoftissue clamped, and therefore thefiring force
`necessaryto fire the mechanism.
`SUMMARY OF THE INVENTION
`It is an object of the invention to provide a stapling
`mechanism which is able to be used endoscopically, and
`may also be used in non-endoscopic procedures, and
`provides both stapling and cutting to the surgical site. It
`is desired to have tissue clamped between the jaws of
`the stapling mechanism, and it is also desired that the
`stapling mechanism accomplish this clamping and then
`firing in a two-part, sequenced operation.
`It is further an object of the inventian to provide a
`stapling and clamping mechanism whereby the clamp-
`ing mechanism causes the stapling mechanism to be put
`into position for firing.
`This novel concept also necessarily requires that one
`is prevented from actuating the firing mechanism before
`clamping is accomplished. Therefore, it
`is further an
`object of the invention to prevent firing of the stapling
`mechanism before the entire clamping pracedure is
`completed or if a cartridge is missing or has been previ-
`ouslyfired.
`It is further an object of the invention to provide a
`rotational mechanism which accommodates stapling
`and cutting endoscopically.
`It is further an object of the invention to provide a
`closure mechanism so that the closure mechanism is not
`able to inadvertently spring open before the firing
`mechanism has been fully actuated. It is yet another
`object of the invention to provide a mechanism which
`
`Ethicon Exhibit 2016.020
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.020
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`5,307,976
`
`3
`allows forward and reverse motion of a clamping trig-
`ger such that forward motion causes clamping, and then
`permits stapling, and reverse motion permits the jaws of
`the mechanism to be opened, by reversing the functions
`of the clamping mechanism.
`Finally, it is an object of the invention to provide a
`closure mechanism in a surgical stapler which accom-
`plishes clampingofthe tissue to be stapled in a direction
`opposite that of stapling, that is, from the distal toward
`the proximal end of the stapler. In this way. proper
`amounts oftissue may be adequately clamped, and then
`stapled.
`These and other objects of the invention are de-
`scribed in an endoscopic stapling mechanism which is
`capable of clamping, stapling and cutting tissue. The
`stapling mechanism utilizes a surgical stapling cartridge
`which containsat least two double rowsofsiaples. The
`stapling cartridge also provides for knife means to di-
`vide the two double rowsofstaples during the stapling
`function. The stapling mechanism contains a unique
`trigger mechanism which contains a double trigger
`feature. One of the triggers causes clamping of tissue.
`The othertrigger causesfiring of the staples and actua-
`tion of the knife. Thus, clamping and firing are accom-
`plished separately. Because the system contains a
`unique safety mechanism, there cannot befiring ofsta-
`ples before thereis full clamping oftissue. In this mech-
`anism, stapling is accomplished in any rotatable posi-
`tion, as soon as tissue has been clamped. Yet, the clamp-
`ing tigger locks in position so that it will not inadver-
`tently spring open during use of the firing trigger.
`Uniquely.
`in one of the embodiments described
`herein,
`there is contained in the endoscopic stapling
`mechanism a double clutch mechanism which allows
`the user to derive benefits from both forward and re-
`verse motion of the clamping and firing triggers. Dur-
`ing forward motion of the triggers, there is clamping
`and then firing. During reverse motion, there is the
`capability of overriding any jams encountered bythe
`stapling mechanism, and then allowing the stapled tis-
`sue to be removed from thestapling site.
`Finally.
`in this invention there is the capability of
`having distal clamping of tissue, even larger tissue held
`within a larger size device. After this clamping. there is
`then proximal contact ofthe stapling and closure means
`and thereafter, similar proximal contact of the knife
`mechanism. Thus, while it is easily ascertainable how
`much tissue is clamped between the clamping mecha-
`nisms,it is also easy to determine whether clamping and
`stapling have been properly accomplished.
`These and other objects of the invention will be bet-
`ter understood from the following attached Detailed
`Description of the Drawings, when taken in conjunc-
`tion with the Detailed Description of the Invention.
`DETAILED DESCRIPTION OF THE
`DRAWINGS
`
`FIG. 1 is a side elevational view of an endoscopic
`linear stapling and cutting mechanism of the present
`invention;
`FIG.12 is an exploded perspective view ofthe instru-
`ment of FIG.1;
`,
`FIGS.2a and 26 are cross-sectional views of the view
`of FIG. 1;
`FIGS. 3 and 3a are individual and closeup views of
`the closure trigger of the present invention;
`FIGS. 4 and 7 are operational views of the closure
`trigger and toggle linkage of the invention;
`
`4
`FIGS.5 and 6 are isolated side and top viewsof the
`firing trigger of the invention:
`FIGS.8 and 8a are side and bottom isolated views of
`a typical cartridge of the invention:
`FIGS. 9 and 9a are side and bottom isolated views of
`the anvil of the invention;
`FIGS.98, 9c and 9d are side operational viewsof the
`interaction between the stapler shaft, the cartridge, and
`the anvil closing mechanism;
`FIG. 10is a side isolated view of the knife means with
`a lockout notch;
`FIG. 10a is a side view of an alternate knife means
`with no lockout notch;
`FIG.11 is a side isolated view of the lockout member
`contained in the cartridge of FIGS. 8 and 82.
`FIGS. 13a and 114 showthe motion of the lockout
`member of FIG. 11 when movedbythe knife means of
`FIG. 10 in the cartridge of FIG.8;
`FIG. 12 is a side elevational view of an alternate
`preferred embodiment of the stapler of the present in-
`vention;
`FIG. 12ais an exploded perspective viewof the in-
`strument of FIG. 12
`FIG. 13 is a cross-sectional view of the stapler of
`FIG. 12;
`:
`FIG. 14 is a side view of the closing trigger plate of
`the embodiment as described in FIGS. 12 and 13;
`FIG. 15 is a side view ofthe firing trigger as seen in
`FIG. 13 of the present invention;
`FIG. 15¢ is a side viewof the trigger return linkage of
`the alternate embodiment of this invention;
`FIGS. 16 and 16a are isolated views of the front
`toggle link as seen in FIG. 13 of the present invention;
`FIGS. 17 and 17aare isolated plan viewsof the rear
`toggle link as also described in FIG. 13 of the present
`invention:
`FIGS, 18 and 18q are isolated side and top views of
`another typical cartridge. as used in the stapler of FIG.
`12;
`FIGS. 19 and 19a are isolated side and bottom views
`of the anvil memberused in the stapler of FIG. 12;
`FIG.20 is a detailed viewof the knife mechanism and
`lockout notch as used in the cartridge of FIG. 18, as
`seen in the views of FIGS. 12 and 13 describing the
`alternate embodiment of the present invention; and
`FIGS. 20¢ and 208 are views of the lockout mecha-
`nism before and after motion of the knife means of
`FIGS.19 as in the stapler of FIGS. 12 and 13.
`DETAILED DESCRIPTION OF THE
`INVENTION
`As can be seen from FIGS. 1, le, and 2, in one em-
`bodiment of the surgical stapler of this invention, there
`is described a stapler 100 which contains a handle por-
`tion 110, rotating means 120, a shaft portion 130, anvil
`portion 140, and cartridge assembly 150. A knife means
`160 is slidable within the cartridge assembly 150 to cut
`tissue. In the handle portion 110 there is a first or clo-
`sure trigger (also called a clamping trigger) 112, and
`second or firing trigger 114, The clamping trigger 112
`causes the anvil portion 140 to come into proximity of
`the cartridge assembly 150. The firing trigger 114
`causes the wedges 122 located in the shaft 130 10 move
`through the cartridge assembly 150, and also causes the
`knife means 160, also located in the shaft 130 to move
`through the cartridge assembly 150,
`in order to cut
`tissue.
`
`Ethicon Exhibit 2016.021
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.021
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`§
`
`wn
`
`5,307,976
`§
`As can be seen in more detail in FIGS. 1a, 2a, 28, 3,
`4, 5, 6 and 7 the endoscopic linear stapling mechanism
`400 contains a double trigger mechanism. Thefirst or
`clamping trigger 112 is for closing the jaws 132, 142 of
`the instrument onto tissue, and the second orfiring
`trigger 114 is used for firing the stapler 100. The intent
`of the double trigger design is to combine one-handed
`use within a stapling mechanism, and to make such
`one-handed use so that it is impossible to form staples
`unless the instrumentis fully closed.
`When the instrument is initially loaded, with car-
`tridge assembly 150 held within shaft portion 130 on
`jaw132,the firing trigger 114 is flush with the body 116
`of the instrument, so that it is parallel with the shaft
`portion 130, andis for all practical purposes inaccessible
`to the user. During actuation of the clamping trigger
`112, the firing trigger 114 swings into a “ready”position
`preparatory to actuation. This position is 35° to 45°
`spaced apart from the closure trigger 112, which has
`now moved into position against base 118. As will be
`later described, a multiplier mechanism causesthe firing
`trigger 114 to move through a greater arc than closure
`trigger 112.
`The closure trigger is spring-loaded, so that an in-
`complete closure results in the closure trigger swinging
`open to its position as seen in FIGS. 1 and 2, once again
`spacing the firing trigger 114 awayfrom the reach of
`the hand operating the mechanism. A closure sequence
`roust therefore be completed, with the clamping trigger
`112 locking proximal to the base 118, before the firing
`trigger 114 can be grasped oris operational by the user.
`As can be seen from the FIGS. 1a, 2, 3, 3a, 4 and 7,
`the closure trigger 112 is attached to a front closure link
`124, at pivot pin 126. Glosure trigger 112 is also at-
`tached 10 a rear closurelink 128 which pivots inside the
`handie 110 of the stapler 100. The closure trigger 112
`thereforeis capable of pivoting around the handle por-
`tion at pivot 113, so that it moves roughly 25°-50* , in
`this instance, preferably 35°. The closure trigger 112 is
`spring-loaded at spring 129 so that unless the closure
`trigger 112 is fully rotated toward the base 118, the
`spring 129 causes the closure trigger 112 to reopen toits
`initial position. As will be later explained, it is the mo-
`tion of this closure trigger 112 which causes the anvil
`portion 140 to clampinto proximity of cartridge assem-
`bly 150.
`Furthermore, the closure trigger 112 is connected by
`means of a pin to the firing trigger 114. Thus, as can be
`best seen in FIGS. 28, 3, 5 and 6, the closure trigger 112
`is linked with the firing trigger 114 by means of a pin
`119 which moves in a guided path along slot 117 away
`from the axis of rotation of the closure trigger 112. This
`pin 119, in turn, moves along a path within slot 117 of
`the firing trigger 114. As better seen in FIGS. 28, 5, 6
`and 7, the rotation of the closure trigger for approxi-
`mately 35° results in rotation of the firing trigger for
`approximately 45°, The control of the pin 119 is accom-
`plished by guide plates placed in the body 116 of handle
`portion 110. Now, closure trigger 112 is in place at the
`base 118 of handle 116. Firing trigger 114 needs ta
`travel only 30°-60° to complete a full firing stroke. This
`arc is quite manageable for even the smallest human
`hands.
`this guiding pin 119 no
`After its initial rotation,
`longer acts upon the firing trigger 114. That is, this
`guide pin 119 is no longer in contact with the firing
`trigger 114. This allowsthe firing trigger 114 to com-
`plete its rotation and fire staples withoutinteraction of
`
`6
`guide pin 119 or with the closure trigger 112. Thereby.
`the firing trigger 114 is connected to a spring 121 as seen
`in FIG. 1, which is in turn connected to the handle 110.
`This spring causesthe firing trigger 114 to return to the
`45° position so that triggers 112, 114 may be returned
`during opening of the instrument 100.
`As can be seen in FJGS.1, 1a and 24, and especially
`in FIG.4, there is contained a locking mechanism com-
`prising button 131 which activates leaf spring involu-
`tion 159@ on leaf spring 159 , in order to cause the clo-
`sure trigger 112 to be locked onceit reaches base 118 of
`the handle 116. The closure trigger 112 is locked in
`place by leaf spring 159 which seats underfront closure
`link 124 thus immobilizing pin 126. This in turn restrains
`closure trigger 112. The safety button 131 is pivotally
`mounted to the proximal top of base 118 and rests upon
`leaf spring 159. As will later be explained, thereafter,
`the firing trigger 114 is free to move alone.
`Asfurther can be seen from FIG.25, 4and 7, motion
`of closure trigger 112 causes motion of front and rear
`closure links 124, 128. These front and rear closure links
`124, 128 cause motion in line with the shaft 130 of a
`closure sliding member 136. This closure sliding mem-
`ber 136 is attached in a rotatable fashion at joint 135 . On
`the distal side ofjoint 135 is closure coupler 134, which
`attaches to the end of a closure channel 138. It is the
`closure channel 138 which is attached to the pin 139 in
`the shaft 130 that connects this mechanism to anvil 140.
`Closure channe! 138 causes closure of the anvil por-
`tion 140 into proximity and alignment with the car-
`tridge assembly 150. This is accomplished in that the
`closure links 124, 128 first move parallel to the axis of
`the shaft 130, as in FIG. 7, from their original positions
`in FIG.4, Closure channel 138 is caused to slide within
`shaft 130. The front top surface 138¢ of closure channel
`138 pushes forward and downon the anvil. This causes
`anvil 140 to come parallel to cartridge assembly 150 so
`that there is alignment of cartridge 150 and anvil 140.
`The shaft 130 is formed from a stationary tube, so that
`the closure channel 138 moves within the shaft 130 at
`the distal end of the instrument 100.
`This double trigger mechanism #12, 114 has the fol-
`lowing advantages. The firing trigger 112 cannot be -
`actuated unti] the closure trigger 114 has been com-
`pletely snappedinto its final position, due to locking of
`the closure trigger 112 inside the handle 110. Therefore,
`one is certain that tissue has been clamped before the
`firing trigger 114 has been placed into motion. The
`firing trigger 114 can be actuated. without repositioning
`the hand following closure of the instrument. Thatis,
`the hand stays stationary, and is once again gripped
`around thefiring trigger 114, with closure trigger 112
`maintained at the base 118 of the handle 110. Thisfacili-
`tates rapid completion of the firing sequence without
`requiring the surgeon's attention on the stapler away
`from the endoscopic video screen and thereby away
`from the operating arena. In addition, both the closure
`trigger 112 and the firing trigger 114 utilize a mecha-
`nism which is familiar to those who use surgical instru-
`ments, a pistol grip with a trigger type actuation.
`As has earlier been explained. the closure trigger 112
`pushes on the central pivot pin 126 of a toggle linkage
`124, 128. Central pivot pin 126 rides in slot 115. This
`central pivot pin 126 results in relatively large amounts
`of motion in ihe closure channel] 138 (see FIG. 4) which
`results in gross closure of the instrument 100. The me-
`chanical advantage provided bythe toggle linkage 124.
`128 during this portion of closure is relatively small.
`
`ata
`
`Ethicon Exhibit 2016.022
`Intuitive v. Ethicon
`IPR2018-01247
`
`Ethicon Exhibit 2016.022
`Intuitive v. Ethicon
`IPR2018-01247
`
`
`
`5,307,976
`
`This has the advantage of providing the user with high.
`tactile feedback. That is, the user is readily able to tell
`whetherthe system is overloaded with tissue. Near the
`position wherein movement of the toggle linkage 124,
`128, (FIG.7) is nearly complete. the closure trigger 112
`has moved into place at base 118. and front closure link
`124 and rear closure link 128 have been made generally
`parallel to the shaft 130, relatively little motion of the
`linkage 124, 128 results from any given rotation of the
`trigger 112. Trigger 112 rotation at this point provides
`significantly higher closure force than during thefirst
`portion of its motion. This is critical in accomplishing
`preloading of anvil 140 during the final portion of clo-
`sure, and is in theory only constrained by the structural
`limitations of the system, as well as the force able to be
`applied by the user.
`.
`As can be seen from FIGS.26, 5 and 6,firing is ac-
`complished by a simple rotation of the firing trigger 114
`acting as a lever arm aboutpivot 413. The firing trigger
`is linked to the firing or driver rod 144 and driver rod
`link 146 by meansoffiring links 148. These firing links
`are engaged with the firing triggers by means of a
`clutch. This clutch mechanism is better seen in the top
`view of the firing trigger as seen in FIG.6. This clutch
`mechanism does not engage thefiring link 148 until the
`firing trigger 114 is
`in a “ready to fire” position.
`whereby hook 149 engages link 148. This eliminates the
`potential for firing the instrument prior to complete
`closure of the mechanism by closure trigger 112.
`Once the clutch system has engaged the firing link
`148, this causes the driver rod link 146 to be translated
`bypin 145, and moving with link 148 in slot 147, in a
`generally parallel position ta the shaft 130 of the mecha-
`nism. This driver rod link 146 is connected to driver rod
`144 which is rotatably connected in nozzle 120 to a
`pusher block 152 contained in the shaft 130. This pusher
`block is connected to firing wedges 122 and knife mech-
`anism 160, as seen at the proximal edge ofthe shaft 130
`which enters the cartridge assembly 150. The firing
`wedges 122 are able to transversely movestaples loaded
`in the cartridge assembly 150 so that theyare fired into
`the anvil portion 140, as best seen in FIGS. 2a, 8, 8c. 9
`and 9a, and as well known in the art. The knife mecha-
`nism 160 is capable of cutting tissue between the com-
`pleted pair of double ortriple rows(or more) of staples.
`as also is well knownin the art.
`After firing has been completed, the firing mecha-
`nism returns by means of a compression spring 156
`placed about driver rod 144 along shaft 130, so that
`spring 156 is stationary at base 157, which causes the
`driver rod 144 to be movedin a direction reverse from
`firing. Spring 156 itself has a sufficient strength to also
`cause driver rod 144 to move the firing link 148 via
`linkage 146 to return to its readyto fire position. This
`similarly causes the driver rod 144 to pull the wedges
`122 and the knife 160 so that they are removed from the
`cartridge assembly 150. If the wedges 122 or the knife
`160 do not return, that is if they are jammed,the firing
`mechanism comprising the firing trigger 114 contains a
`reverse clutch assembly which allowsthefiring trigger
`114 to engage with the firing link 148 at hook 151 (FIG.
`6) so thatit is capable of causing this assembly to move
`in a reverse or rearward direction. This provides a
`backup to the system, in the event there is a failure in
`the driver return spring 156 or if the instrument has
`inadvertently been misassembled.
`The system also contains a safety mechanism which
`locks the closure trigger 112 in its closed position, This
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`safety mechanism is a leaf spring 159 which interacts
`with the safety button 131 ontherearof the instrument.
`Side plates on the portionofthe toggle linkage assembly
`124, 126 cause the leaf spring to remain in a tensioned
`position, and guide the leaf spring during its motion.
`When the front closure link 124 is in its straightened
`position, so that the rear closure link 128 is also rotated
`to be generally parallel with the shaft 130,
`the leaf
`spring 159 has been tensioned to restrain the toggle
`linkage 124, 128 in its parallel position. The safety but-
`ton131 on the rear of the instrument thereafter urges
`the leaf spring 159 in a forward direction, toward the
`cutting mechanism. This forward motion of the spring
`159 causes the toggle linkages 124, 128 to be freed from
`the restraint of the spring 159. This motion allows free-
`dom of movement for closure trigger 112.
`As has been previously described, and as better seen
`in FIGS. 2a, 8, 9 and 9a-9d, the jaws 132, 142 ofthis
`instrument are closed by means of a cam surface 127 on
`the outer surface of the anvil 140. The anvil 140 pivots
`about pin 139 embedded in slot 141 of the closure chan-
`nel 138 in shaft 130. Channel 138 is pushed forward
`With the actuation of the closure trigger 112. Closure
`channel surface 138a bears upon the cam surface 127 of
`the anvil 140, forcing it to pivot and move transversely
`within slot 153 contained in shaft 130. The location of
`the slot 183 as compared to the surface profile of the
`eam 127 determines motion of the anvil 140, such that
`the slot 153 and slot 141 combination forms a “fixed”
`pivot, whichis fixed only with respect to the anvil 140.
`Therefore, anvil 140 is allowed to move transversely
`across the axis of a stationary tube 130. Shafi orstation-
`ary tube 130 forms the “ground”position for the pivot
`pin 139, so that its motion is only transverse compared
`to the shaft 130,
`Asbetter seen in FIGS. 9b-9¢, the motion ofthe anvil
`140 follows a predetermined path. First, the anvil 140 is
`rotated to a position parallel to cartridge 150. Then,
`anvil 140 moves in a direction transverse to the axis of
`shaft 130, maintaining its parallel alignment with car-
`tridge 150, until it is abutting pin 161 on cartridge 150.
`This mechanismis also assisted by surface 1276 on the
`opposite side of anvil 140, This is better seen in FIG. 9.
`This second cam surface 1276 on the opposite portion of
`the proximal end of anvil 140 rides on buttons 1396 held
`within the c