United States Patent
`
`1191
`
`[11]
`
`3,985,249
`
`
`
` Aker et al. [45] Oct. 12, 1976
`
`[54] QUICK CHANGE ATTACHMENT
`[75]
`Inventors: Ludwig E. Aker, Hamilton;
`F d
`'
`A. Sk
`, B 1'
`bgttshegfganadaanes
`ur lngton
`~
`.
`International Harvester Company,
`Chicago, Ill.
`
`'
`1731 ASSIgnee:
`
`,
`
`Apr. 14,1975
`Filed:
`[22]
`[21] Appl. No.: 567,914
`'
`
`[52] US. Cl. ......... 214/145 A' 172/275
`[51]
`Int. Cl.2
`......................... 1502F 3/81
`[58] Field of Search'''''''''''''214/145A 131 A 620‘
`'
`172/272 273 275
`
`[56]
`
`3,204,793
`3,606,052
`
`References Cited
`.
`UNITED STATES PATENTS
`9/1965
`Lane ............................... 214/145 A
`9/1971
`Schurz ............................ ‘214/145 A
`
`
`Birk ..................... 214/145 A
`9/1973
`3,760,883
`6/1975 Wleland .............................. 172/272
`3,887,096
`.
`.
`Primary Examiner—Robert J. Spar
`Assistant Examiner~Ross Weaver
`Attorney, Agent, or Firm—Douglas W. Rudy; Floyd B.
`Harman
`
`.
`
`ABSTRACT
`[57]
`An attachment for use on loader booms that enables ‘
`
`quick changes of working implements. The attach-
`ment having an implement carrier frame provided
`with carrier saddles and slots positioned to carry and
`locate standard mounting pins in stock implement
`mounting frames such that the implement is automati-
`cally locked to the carrier frame via the means of au—
`tomatic locking devices of spring loaded pins in re-
`ceiving apertures.
`
`9 Claims, 7 Drawing Figures
`
`
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`Page 1 0f 8
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`CATERPILLAR EXHIBIT 1003
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`CATERPILLAR EXHIBIT 1003
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`US. Patent
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`Oct. 12,1976
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`Sheetlof2
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`3,985,249
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`U.S. Patent
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`Oct. 12, 1976
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`Sheet 2 of 2
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`985,249
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`1
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`QUICK CHANGE ATTACHMENT
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`3,985,249
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`5
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`2
`ing mechanisms are activated the implement is auto~
`matically locked to the carrier frame and hence the
`- boom assembly through the interaction of a kickoff
`means mounted on each boom and the handle of the
`locking mechanisms.
`Locking mechanisms can be disengaged by pulling a
`handle mounted on the outboard end of each locking
`pin. A locking pin can be detained in a disengaged
`position by rotating the handle and positioning it such
`that an extension of the handle is held in tension on a
`
`BACKGROUND OF THE INVENTION
`1. Field of the Invention
`‘
`The invention relates to loader attachments that are
`designed to accommodate a broad range of boom car-
`ried implements to be utilized alternatively with a sin-
`gle boom assembly.
`_
`.
`2. Description of the Prior Art
`It has been known to provide a permanent implement
`carrying frame on loader booms for quick attachment
`to an array of work implements. Various types of at~
`taching systems have been developed. These generally
`consist of an‘alignment means mounted on the loader 15
`boom that is compatible to receive an appropriately
`modified implement such that alignment between the
`alignment means and the implement is attained. After
`. the implement is positioned it is usually locked in place
`by the operator either with manually or hydraulically 20
`controlled pins, bars or latches.
`Quick attach loader assemblies are also known
`wherein extensive modification to the implements to be
`used on the loader boom assemblies must be made in
`
`10
`
`detent. The automatic locking mechanism can only be
`maintained in a disengaged position when either the
`carrier frame is rotated forward slightly (when an im-
`plement is hanging in the pin carrying saddles) or when
`no implement is hanging in the carrier frame.
`The primary object of this invention is to provide a
`quick change attachment for allowing the use of a mul-
`titude of implements on a loader vehicle.
`Other objects of the invention are to provide a quick
`change attachment that is easy to use under field condi-
`tions, self-aligning, automatically locking, and sturdy
`and positive in use.
`’
`A further object is to provide a system that can be
`retrofitted to current loaders and implements without
`the need for significant component modifications.
`
`‘
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`Other objects of the invention will become apparent
`upon referring to the accompanying drawings which
`are illustrative of the invention.
`FIG. 1 is a side view of aloader bucket about to be
`mounted on a quick attach carrier frame and a partial
`loader boom;
`FIG. 2 is an elevation view of the quick attach carrier
`frame;
`FIG. 2 is a front elevation view of the quick attach
`carrier frame taken through plane 3~3 of FIG. 2;
`FIG. 4 is a plan view of a portion of the quick attach
`frame through lines 4—4 of FIG. 2 having mounting
`pins installed and a portion of an implement mounted
`in position;
`FIG. 5 is a perspective view of the left carrier of the
`quick attach frame with boom means and mounting
`pins;
`'FIG. 6 is an elevation view of the rear surface of a
`loader bucket taken as plane 6—6 of FIG. 1;
`FIG. 7 is the locking pin assembly of the invention in
`partial section.
`
`DETAILED DESCRIPTION OF THE DRAWING ,
`
`The preferred embodiment of the invention as well as
`specific features and many of the attendant advantages
`of this invention will be readily appreciated as the in-
`vention is explained by reference to the following de-
`tailed description when considered in connection with
`the accompanying drawings in which like reference
`numerals designate like parts.
`Looking first at FIG. 1 a fragmentary forward portion
`of a forward extending loader boom assembly generally
`depicted as 10 consisting of a boom 12, a fragmentized
`forward portion of a conventional boom lift cylinder 14
`pivotally attached to theboom 12 at one end and to the
`vehicle frame (not shown) at the other end such that
`the boom assembly 10 can be adjustably raised Or low-
`ered. Loader tractors generally have a left and right
`boom assembly mounted outboard of the body of the
`vehicle. Only the left boom is shown in FIG. 1, that
`
`25
`
`.
`order that the combination can be used.
`This invention alleviates numerous shortcomings in
`the state of the art of which the most obvious are; the
`extensive modifications of implements in order to make
`them compatible with the system and closely fitting
`alignment devices which present attaching difficulties 30
`in the field due to the necessity of perfect alignment of
`components prior to locking. Another disadvantage of
`some of the state of the art of quick assemblies is the
`active part that the operator plays in locking the imple-
`ment in place which would contribute to a safety ha- 35
`zard if he would forget to lock the implement in posi- .
`tion prior to operating.
`The instant
`invention requires that no action be
`taken by the vehicle operator in order to lock an imple-
`ment to the carrier frame. This is accomplished com- 40
`pletely automatically minimizing exposure to safety
`hazards.
`Stock implements normally compatible with the
`boom of the loader vehicle being used don’t require
`extensive modifications as with some systems. They 45
`need only have one hole drilled in each outboard plate
`of the stock mounting channels to accommodate a
`locking pin. Simple and straightforward attaching
`means with few moving parts optimize the present ser-
`vice life of this quick change system.
`
`50
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`SUMMARY OF THE INVENTION
`
`The present invention is concerned with quick attach
`fixtures for fixing implements to a boom of loader vehi~
`cles.
`
`55
`
`More particularly, it is concerned with an implement
`carrier frame that can be pivotally mounted on a loader
`boom assembly having a loader boom and an imple-
`ment operating link to carry implements having the
`usual mounting pins inserted in the usual mounting 60
`holes of the implement. The carrier frame is con-
`structed having two horizontally spaced apart carriers
`mounted on either end of a transverse stabilizer, each
`_ carrier having an upwardly opening carrier saddle and
`bottom pin alignment slot positioned to accept the pins 65
`mounted in their usual position on the work implement.
`Locking mechanisms are mounted on a bracket on
`each the left and right carriers such that when the lock-
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`3,985,249
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`3
`corresponding to the left side of an observer at the rear
`of the vehicle facing the vehicle.
`Referring additionally to FIGS. 2, 3, and 5 it is shown
`that the implement carrier frame 30 is mounted on the
`boom assembly 10 using first top mounting pins 26 and
`first bottom mounting pins 28 which are positioned
`through first top apertures 56 of the outboard attaching
`plate 40 of the implement carrier frame 30 and in the
`first bottom apertures 58 of the same plate; then passed
`through the top pin receiving means 22 of an imple-
`ment cylinder piston rod 20 of implement cylinder 16
`and the bottom pin receiving means 24 at the forward
`end of the boom 10; and finally passing through the
`first top aperture 56 in the inboard attaching plate 38
`of the implement carrier frame 30 and the first bottom
`aperture 58 of the same plate. Mounting pins 26 and 28
`are retained in position using conventional means such
`as cotter pins. This pin mounting technique is used on
`both the left and right’booms. However, it is felt that
`only one attaching sequence need be described for an
`understanding of the technique which is similar to the
`normal boom-implement attaching system well known
`in the art. In order to attach the implement carrier
`frame 30 which is now an integral component of the
`boom assembly 10 to the implement, in this case exem-
`plified by a bucket 60 (FIGS. 1 and 6) which has sec!
`ond top mounting pins 66 and second bottom mounting
`pins 68 permanently located in each of the left and
`right mounting channels 62 and 64. It is only necessary
`for the loader vehicle operator to lower the bottom
`assembly 10 by means of the boom lift cylinder 14; roll
`the implement carrier frame 30 forward by means of
`the implement operating link, in this case cylinder 16;
`drive the loader forward while aligning the pin carrying
`saddles 42 and 44 with the mounting pins 66 in the
`bucket 60; position the carrier frame 30 such that the
`left 42 and right carrying saddle (right shown only in
`FIG. 3) engage the second top mounting pins 66 which
`are a permanent fixture in the left and right mounting
`channels 62 and 64 respectively (FIG. 6); roll the car-
`rier frame backward with the implement cylinder 16
`such that
`the second bottom mounting pins 68 of
`bucket 60 will swing toward the bottom pin slots one
`shown as 46. When the bucket carrier frame has been
`
`rolled back far enough and there is sufficient ground
`clearance, the bucket 60 will be in position». Specifi—
`cally second top mounting pins 66 will be resting in the
`pin carrying saddles 42 and 44 and second bottom
`mounting pins 68 resting on the rear curved surface of
`the forward opening pin alignment slots 46 and 48 to be
`locked into place through the means of automatic lock-
`ing mechanism 80. (Detailed in FIG. 7).
`It is necessary to point out (referring to FIGS. 4 and
`7) that the inboard and outboard walls 38 and 40 of
`both left and right carriers 36 and 34 are spread apart
`further at the rear sections which houses the boom
`assembly 10 than they are at the forward sections,
`which are offset inwardly, which must be sufficiently
`narrow to fit into the a mounting channels 62 and 64 of
`the implement 60. This is accomplished by the vertical
`creases 50 and 52 in the outboard and inboard plates
`40 and 38. Upper reCesses connected by a plate 43
`form the pin carrying saddles 42 and 44 and lower
`recesses connected by a plate 47 form the alignment
`slots 46 and 48. It is' disclosed that both the left and
`right carriers, which are fixedly linked together with
`the transverse stabilizer 32, having this offset configu-
`ration.
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`Automatic locking of the implement had been ac—
`complished cOincidental to the bucket 60 swinging into
`position as described above. Automatic locking was
`facilitated 'by means of interaction of the kickoff means
`18, a projecting rod attached to the boom contacting
`the retracting handles 82, best shown in FIG. 5, (when
`the implement carrier frame was rolled back past verti-
`cal) which were released from the restrained position
`allowing the locking pins 84 (both left and right) to
`pass through the locking pin‘apertures 74 and 54 in the
`outboard flanges 72 and 70, right and left respectively,
`of the implement mounting channels 62 and 64 of FIG.
`6, and the outboard attaching plate of the left 36 and
`right 34 carriers of the implement carrier frame 30.
`Referring to FIG. 7 it is shown that the retracting
`handles 82 previously noted, (which have been placed
`in a retained position by the operator when he de-
`tached the previous implement) are integral with the
`aft section 98 of the locking pins 84, which in them-
`selves are carried in cylindrical containers 86 along
`with the biasing means 88 which tends to exert pressure
`on'the locking pin 84 such that the locking pin will
`attempt to escape the container when not restrained by
`the retracing handle extension 82 in either a locked
`position A or a restrained position as shown by position
`B of FIG. 7.
`’
`
`The locking pin 84 (FIG. 7) has a leading portion 96
`which is larger in diameter than the aft section 98 such
`that biasing means 88 is captive between surface 100
`and a second surface 102 at the outboard end of pin
`container 86. The handle collar 104 prevents the bias-
`ing means 88 from urging the locking pin 84 com-
`pletely out of the container 86 as the handle collar 104
`will not pass through the outboard end of the pin con-
`tainer 86.
`'
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`The automatic locking mechanism 80 is mounted on
`a mounting plate 90 (FIG. 5) that is fixedly attached to
`the rear (widest) portion of the outboard wall 40 and is
`offset away from the outboard wall at its forward por-
`tion so that the outbound implement flange 70 can fit
`between the attaching plate and the mounting plate 90.
`The loader is now in readiness to be used as desired
`by the operator.
`'
`Detaching the bucket, or other implements, from the
`implement carrier frame 30 is safe and simple when
`performed as follows.
`The operator positions the bucket 60 through manip-
`ulation of the boom lift cylinder 14 and the implement
`cylinder 16 slightly off the ground in a substantially
`level position in order to minimize binding between the
`locking pins and the locking pin apertures 74 and 54 of
`the outboard implement mounting flanges 72 and 70
`and the outboard walls 40. The retraction handle 82 is
`then pulled outwardly (FIG. 7) causing locking pin 84
`to be retrieved from the locking pin aperture 74. Once
`the locking pin is clear of bucket 60 the locking handle
`is rotated such that landing surface 92 of an extension
`on the locking handle rests on the flat end of the lock—
`out stop means 94 causing the locking pin 84 to remain
`in the retracted position until it is again disengaged by
`means of the kickoff means 18 described earlier.
`The implement is now free to swing forward in the
`pin‘ carrying saddles 42 and 44 of the implement carrier
`frame 30. This will be so unless the operator rolls the
`carrier back causing relocking of the implement; In
`order to drop the implement the operator will roll the
`carrier frame 30 forward while lowering the boom 12.
`When the implement is detached, the pin carrying sad-
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`3,985,249
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`dles 42 and 44 (FIG. 3) are free of the second top
`mounting pins 66 (FIG. 6), the operator backs the
`vehicle from the resting implement.
`It should be understood that care should be exercised
`in keeping the implement carrier frame free of accumu-
`lated dirt, brush, rocks, etc. and also in good alignment.
`This is necessary to prevent a faulty mating of the im-
`plement to the implement carrier frame.
`Thus, it is apparent that there has been provided, in
`accordance with the invention, a quick change attach— ‘0
`ment that fully satisfies the objects, aims, and advan-
`tages set forth above. Although the invention has been
`described in conjunction with a specific embodiment
`thereof, it is evident that many alternatives, modifica-
`tions, and variations will be apparent to those'skilled in 15
`the art ill light 9f theforegoing description. For exam-
`ple, the rnventron might be equally utilized 0‘} other
`types 0f implements 0" vehicles. Accordingly, 1‘ 1s m'
`tended to embrace all such alternatives, modifications
`and varratrons as fall Within the spirit and scope of the 20
`appended claims.
`What is claimed is:
`
`1. A quick change attachment for use on a loader
`boom assembly comprising:
`an implement carrier frame having a left and a right 25
`carrier attached to a transverse stabilizer and
`spaced apart from each other at either end of" said
`transverse stabilizer;
`pin means for attaching said implement carrier frame
`to said boom assembly comprising first top and first 30
`bottom pair of mounting pins;
`a work implement having upper and lower apertures;
`second top and bottom mounting pins for insertion
`into said work implement apertures;
`_
`means for attaching said work implement to said
`implement carrier frame having a pair of carrier .
`saddles incorporated in said left and right carriers
`that are capable of receiving the second top mount-
`ing pins;
`means for aligning said work implement with said
`implement carrier frame comprising a pair of align—
`ment slots that are capable of receiving said second
`bottom mounting pins;
`an automatic locking mechanism carried on each of
`said carriers of said implement carrier frame to 45
`secure said work implement
`to said implement
`carrier frame;
`a kickoff meansmounted on said loader boom assem-
`bly of sufficient length that it will initiate locking
`action through interaction with said automatic
`locking mechanism when the implement carrier
`frame is rolled back past the vertical using the
`loader boom assembly.
`2. The invention in accordance with claim 1 wherein
`said carrier comprises:
`an outboard wall having a first top and a first bottom
`mounting pin receiving aperture; and
`in said outboard wall an aperture for receiving said
`locking pin; and
`a vertical crease in said outboard wall that divides a 60
`forward section from a rear section of said out-
`board wall while providing that said forward sec-
`tion be offset inwardly in relation to said rear sec-
`tion;
`an inboard wall having a first top and a first bottom
`mounting pin receiving aperture; and
`a vertical crease in said inboard wall that divides a
`forward section from a rear section while providing
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`35
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`6
`that said forward section be offset inwardly in rela-
`tion to said rear section;
`an upwardly opening saddle connecting the forward
`upper section of said outboard wall to the forward
`‘ upper section of said inboard wall for receiving said
`”second top mounting pin; and
`a forward opening alignment slot connecting the
`forward lower section of said outboard wall to the
`forward lower-section of said inboard wall for re-
`ceiving ‘said second bottom work implement
`mounting pins;
`a bracket mounted on the outboard wall having an
`offset forward portion for carrying said automatic
`locking mechanism.
`3_ In a loader boom assembly comprising extending ‘
`adjustable arms each terminating at a forward portion
`having an aperture, implement operating links having
`apertured termination points, mounting pin means for
`attaching implements to said arms and said links
`through said apertures, and a detachable work imple—
`ment having apertures for receiving locking pins and
`also having second top and bottom mounting pins in-
`stalled therein, the improvement comprising an imple-
`ment carrier frame for attaching and carrying said work
`implement on said loader boom assembly, said imple-
`ment carrier frame having a left and a right carrier each
`carrier comprising:
`a carrier having inboard and outboard sidewalls said
`sidewalls deformed vertically such that said out-
`board wall isdeflected inward toward said inboard
`wall and said inboard wall is deflected toward said
`outboard wall while both walls remain parallel and
`equidistant from each other at their respective
`forward and rear sections as defined by said verti—
`cal deformation; and
`said carrier having first top and bottom apertures on
`said rear section of said inboard and outboard walls
`for mounting said boom assembly using said first
`top and bottom mounting pins; and
`formed in the forward upper section of said carrier, a
`connected upper recess defining a saddle for re-
`ceiving said second top mounting pin of said work
`implement; and
`’
`formed in the lower forward section of said carrier, a
`‘ connected lower recess'defining a slot for aligning
`with said second bottom mounting pin of said work
`implement;
`an automatic locking mechanism fixedly attached to
`said rear section of said outboard wall of said car-
`rier with the front portion of said automatic locking
`mechanism offset outwardly from the forward sec-
`_ tion of said outboard wall of said carrier; and
`a kickoff means mounted on said loader boom assem-
`bly for initiating locking action through interaction
`with said automatic locking mechanism when said
`carrier is rolled back past the vertical using the
`implement operating links.
`4. In a loader boom assembly comprising extending
`adjustable arms each terminating at a forward portion
`having an aperture, implement operating links having
`apertured termination points, first mounting pin means
`forattaching implements to said arms and said links
`through said apertures, and a detachable work imple-
`ment having apertures for receiving locking pins and
`also having second top and bottom mounting pins in-
`stalled therein, the improvement comprising an imple-
`ment carrier frame for attaching and carrying said work
`
`65
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`3,985,249
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`7
`implement on said loader boom assembly, said imple-
`ment carrier frame comprising:
`a pair of carriers having inboard and outboard side-
`walls said sidewalls deformed vertically Such that
`said outboard walls are deflected inward toward 5
`said inboard walls and said inboard walls are de-
`flected toward said outboard walls while both walls
`remain parallel and equidistant from each other at
`' their respective forward and rear sections as de-
`fined by said vertical deformation; and
`said carriers having first top and bottom apertures on
`said rear section of said inboard and outboard walls
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`6. The invention in accordance with claim 5 wherein
`said automatic locking mechanism can be maintained
`in an unlocked position through the engagement of said
`handle and said lockout stop.
`7. A quick change attachment means to be attached
`to the boom assembly of a work vehicle for permitting
`connection of a variety of implements to the boom
`assembly comprising:
`an implement carrier frame having carriers capable
`of supporting an implement;
`an automatic locking mechanism carried by said
`implement Carrier frame and movable between a
`locked position and an unlocked position;
`biasing means for urging said automatic locking
`mechanism toward its locked position;
`.
`lockout stop means for retaining said automatic lock-
`ing mechanism in said unlocked position; and
`kickoff means mounted on the boom assembly for
`disengaging said automatic locking mechanism
`from its retained position with said lockout stop
`means whereby said biasing means will urge said
`automatic locking means into a locked position in
`response to contact between said kickoff means
`and said automatic locking mechanism.
`8. The invention as described in claim 7 wherein the
`
`implement carrier frame-further comprises:
`a pair of carriers having inboard and outboard side—
`walls deformed vertically such that said outboard
`walls are deflected inward toward said inboard
`walls and said inboard walls are deflected toward
`said outboard walls while both walls remain paral~
`lel and equidistant from each other at their respec-
`tive forward and rear sections on either side of said
`vertical deformation;
`said carriers having first top and bottom apertures on
`said rear section of said inboard and outboard
`walls;
`connected upper recesses formed in the forward
`- upper section of each carrier;
`connected lower recesses defining slots formed in the
`lower forward section of each carrier;
`a transverse stabilizer connecting said inboard plate
`of each carrier together; and
`an automatic locking mechanism attached to the rear
`section of said outboard walls of at least one of said
`carriers with the front portion of said automatic
`locking mechanism offset outwardly from the for-
`ward section of said outboard wall of said carrier.
`9. The invention in accordance with claim 7 wherein
`the automatic locking mechanism further comprises:
`a mounting bracket having a locking pin aperture in
`the forward portion thereof;
`a cylindrical container attached to said mounting
`bracket in alignment with said locking pin aperture
`being opened at the inboard and outboard ends;
`a locking pin rotatably carried inside said container
`capable of sliding through said locking pin aperture
`having a large diameter leading portion and a
`smaller diameter aft section;
`a biasing means inside said container carried on said
`locking pin between said leading portion of said
`locking pin and said outboard end of said cylindri-‘
`cal container to urge said locking pin into said
`locking pin aperture;
`a handle fixedly attached to said aft section of said
`-locking pin to assist in retracting said pin against
`said biasing means, said handle comprising an ex-
`
`for mounting said boom assembly using "said first
`top and bottom mounting pins; and
`formed in the forward upper section of each said 15
`carriers, connected upper recesses defining a sad-
`dle for receiving said second top mounting pins of
`said work implement; and
`formed in the lower forward section of each carrier,
`connected lower recesses defining slots for aligning 20
`with said second bottom mounting pins of said
`work implement,
`a transverse stabilizer fixedly connecting said inboard
`plates of each of said pair of carriers;
`an automatic locking mechanism fixedly attached to 25
`said rear section of said outboard walls of each of
`said carriers with the front portion of said auto-
`matic locking mechanism offset outwardly from
`the forward section of said outboard walls of said
`carriers; and
`a kickoff means mounted on said loader boom assem-
`bly for initiating locking action through interaction
`with said automatic locking mechanism.
`5. In an automatic locking mechanism for use on an
`implement carrier frame carried on the forward portion 35
`of a pair of boom arms said automatic locking mecha-
`nism comprises:
`a mounting bracket having a locking pin aperture in
`the forward portion thereof;
`a cylindrical container attached to said mounting
`bracket in alignment with said locking pin aperture
`being opened at the inboard and outboard ends;
`a locking pin rotatably carried inside said container
`capable of sliding through said locking pin aperture
`having a large diameter leading portion and a
`smaller diameter aft section;
`a biasing means inside said container carried on said
`locking pin between said leading portion of said
`locking pin and said outboard end of said cylindri-
`cal container to urge said locking pin into said
`locking pin aperture and said work implement
`locking pin aperture;
`a handle fixedly attached to said aft section of said
`locking pin to assist in retracting said pin against
`said biasing means, said handle comprising an ex-
`tension to afford retention of the pin when re-
`tracted;
`a lockout stop mounted on said cylindrical container
`positioned to receive said extension of said handle
`when said handle is rotated such that said lockout
`stop and said handle extension are in contact;
`kickoff means attached to said boom arms having a
`projecting rod that upon contact with said handle
`will disengage said lockout stop and said handle
`' extension and allow said biasing means to urge said
`locking pin through said cylinder until said handle
`limits the travel of said locking pin by coming to
`rest on said outboard portion of said cylinder.
`
`4o
`
`45
`
`50
`
`55
`
`60
`
`65
`
`Page 7 0f 8
`
`Page 7 of 8
`
`

`

`3,985,249
`
`9
`tension to afford retention of the pin when re—
`tracted;
`'
`a lockout stop mounted on said cylindrical container
`positioned to receive said extension of said handle
`when said handle is rotated such that said lockout
`stop and said handle extension are in contact;
`kickoff means having a projecting rod that upon
`
`10
`contact with said handle will disengage said lock-
`out stop and said handle extension and allow said
`biasing means to urge said locking pin through said
`cylinder until said handle limits the travel of said
`locking pin by coming to rest on said outboard
`portion of said cylinder.
`*
`>1:
`*
`a:
`*
`
`10
`
`15
`
`20
`
`25
`
`30
`
`~35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`Page 8 0f 8
`
`
`
`Page 8 of 8
`
`

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