3,654,961
`United States Patent
`
`Phillips [451 Apr. 11, 1972
`
`[15]
`
`[72]
`
`[54] ROTARY PERCUSSION DRILL HAVING
`A HYDRAULICALLY ACTUATED
`PERCUSSION DEVICE
`Inventor: Albert Phillips, 465 Kiwanis Avenue, Mor-
`gantown, W. Va. 26505
`July 31, 1970
`[22] Filed:
`L N _: 60 023
`0
`’
`Related U.S. Application Data
`[62] Division of Ser. No. 807,388, Mar. 14, 1969, Pat. No.
`3’547’206'
`'
`
`[21] App
`
`[521 u.s. Cl................137/624.13, 137/624.18, 137/5996}./1386,
`[51 1
`Int. Cl........
`................................................F15b 21/02
`9“ °' ~~~~~"iii/é';‘2'££1117/533'§%b6i§’§’3§3'l39g
`
`'
`
`’
`
`’
`
`'
`
`’
`
`’
`
`Bentley ......................... ..137/624.2 x
`9/1968
`3,399,698
`Kinsley ...........................137/624.2 x
`9/1966
`3,273,593
`Primary Examiner-Alan Cohan
`Attorney-—Stanley J. Price, Jr.
`i
`
`ABSTRACT
`[573
`The percussive forces are imparted to the drill rod by a
`hydraulically actuated reciprocating piston housed in a
`cylinder having fluid openings on opposite sides of the piston.
`§:)‘;‘:i:g“sd:; Pr’e“c‘i‘p"r’:C:ft:“t‘f1‘:"‘:,‘i’sf(1:n°fiatfliz
`multi-valve control device. A timing mechanism is included in
`
`gjeggfye;;S‘;§f£é:“guf§‘;fe:::31:
`the Openinss in the cylinder 0" °_PP°Site §ideS Ofthe Piston and
`i:,::‘::::::‘i,::8,;:e,5;e:,::*;;:;:d“,‘::.,£;:":.::*;,:i:;':**:;:
`
`cess fluid supplied to the cylinder for each stroke of the piston.
`
`[56]
`
`References Cited
`UNITED STATES PATENTS
`
`I
`
`9 Claims, 13 Drawing Figures
`‘
`'
`
`‘
`
`3,022,738
`
`2/1962
`
`Krute ....................................... ..9l/39
`
`/36
`
`,.
`
`/4?
`
`244
`
`/94 /as
`
`/90
`
`/52
`
`
`
`
`
`NOV
`
`Exhibit 2007
`
`3“
`
`3/‘
`
`JET’
`
`276‘ 354
`/44
`251:)
`VWIIVIIIAE\‘’lIlllI;3VIII'IlII.NVIIIIIAXVII'II’II4\‘1II!’II;N'4VIII:-
`I I
`.‘
`:
`'
`
`-u/9.:
`_,‘
`
`
`"
`:
`til!"
`/55
`filling‘
`
`
`
`,.
`:1
`II.;\
`7/11
`
` -,
`_.
`
` NOV
`Exhibit 2007
`
`

`
`PATENTEDAPR 1 1
`
`I972
`
`3, 854.981
`
`wm1m5
`
`5.2m..J.h.
`
`
`
`
`
`
`3.......,H.H.L...._§‘W[I1wmud.wl.l.x\.r.W.”u..J...u..lu.\\.....r.||nwrll.R.-Imn.|IV«I[.-U......vzlhlnflI“I.rtll.z:;.-,wvm.
`
`
`
`R:
`....
`
`
`
`
`\\n,/5¢lv.“vmk/.\n..\x..;..5.2/.y\\5...?!M.\\..\.“.M..5wm§7\\uNv\-,sr..
`
`
`$1-...m..nU|nu:n\_.Wmy/am“..I.I..m..l.l.mm.mmfiV\\\\\\
`.,V...
`
`
`
`I‘4Au‘.‘\-~\‘AVIV\4E“~‘n.VV.5‘:“\I‘.I1‘-‘~.‘\\~‘:uIV':3»..... ....:3AVS‘.A‘Vq
`
`...N.HN..I.\.9...ntVS!1““ZI‘§.~‘§r’.1~‘~§“\L2‘SN.21‘‘~‘\‘.\\L,4E~\‘\..7.V““~‘.‘\\sZN7’.‘sayI-
`
`
`
`
`
`....|!..11/nl.u-/5"H.u\\:.Wmu..nl..“Ml”W../.I.V.Wm“.....1.
`
`
`
`
`
`
`hI|.--WV\\.xdarll.ffKI“!....r1.1.;.....l...-.1t|%s\\\\in.5r\.
`
`
`
`
`
`
`
`
`.Qkxrluu\...urI..flIIIulll.Iy|
`II'IW“Iw-m....mmmmum...fl.
`
`.Iui...¥no._,_~l.
`‘--‘~\Lv’4N“-I1-~VK1~r’.1..u‘s'\..R...x
`I.|nr|L..||.r....
`
`
`
`
`«-m.-....u.\..x..u...l...,_.4—In.../.m.m.__.,.\.m.....m.m_.“.”..s..m|m.,III.
`
`
`
`
`
`
`Svm.....h..llIll...‘.1n.ll...&:\.ww».wu.wV~._./§...\&WvVV\l\fl|In.fix‘..uuuuuuuvuvvu...YR.
`..mu..u..I,IIII...1u....I
`
`
`
`X.IIII|..|....'|l”.v
`
`I...mI..wI..-lI..II'II«.1.u.7.
`.AVI4Ix1\‘\N.u
`....1!1.
`
`3)’
`
`/NVEN7'0‘R
`ALBERT P”/Ll./P3
`J /V4}. (\
`/Ii: Attorney
`
`- NOV
`
`‘ Exhibit 2007
`
` NOV
`Exhibit 2007
`
`
`
`
`
`
`
`

`
`PATENTEDAPR 1
`
`1
`
`I972
`
`3,854,981
`
`SHEET 2 OF 5
`
`.___.__.1.gal‘_ow“.mu._.m.
`Am.V..lhrlcIJ
`5....W
`s:r\HV
`
`-h.
`
`\\_,,//_.v
`
`—
`
`..
`
`
`.IlvVI1A.uW.u‘AV\\.§VJIILI
`|mx6__../0__.4/_H;_6,1L’ wI.
`unmmmuv,.._T.\1m’
`
`V5K1:.10V71.Hum”.9AV.17/1..‘
`
`
`lg’;Mm“M
`//.l..N<
`ismflm
`
`2.-
`
`%k
`
`AIA47s.:.IIII;.iAIIK.
`r’?1'
`
` NOV
`Exhibit 2007
`
`

`
`PMENTEDAPR1 1 I972
`
`3,654,961
`
`SHEET 3 [IF 5
`
`
`
`
`
`
` .\\\\
`
`5., .......... ,.
`-:.::::::: ---- ..._..—.
`'.\\\\\\x\\\\\\‘
`
`-
`
`
`5, ;:~47'Z/72.: g
`
`In‘: Attorney
`
`INV!IV
`4!. BERT PI"!/L l. I
`
`NOV
`
`E) (hibit 2007
`
` NOV
`Exhibit 2007
`
`

`
`PATENTEDAPR 11 I972
`
`3,554,951
`
`SHEET 1; UF 5
`
`
`"
`SUCTION —-9
`
`
`1*1-_--
`
`368
`
`502
`
`D/SCIIARE
`
` /
`spar
`nsoucew 5/8
`
`
`
`/I/'5 Aflornay
`
`//VI/EN701?
`BERT PHILLIPS
`
`NOV
`
`Exhibit 2007
`
` NOV
`Exhibit 2007
`
`

`
`PATENTEDAPR1 1
`
`I972
`
`3,654, 961
`
`SHEET 5 OF 5
`
`
`//Ififia
`
`I
` 1/1
` Xx
`/4
`
`I
`
`V?
`
`
`
`
`
`/IVVE/V70}?
`AL BERT PH/L1. /P5‘
`
`er fézgfl; 4,
`
`his A flor/my
`
`NOV
`
`Exhibit 2007
`
`I
`1
`“zssl
`..
`
`rJ
`
`.
`
`
`H
`
`
`
`Z""”’”°“£\\\
`
`
`
`" “
`
`$\“ul_1lI;_l,l§ ‘
`<‘u.’if:'l::i"'§'l':'n"u3{;;-
`,7 92
`
` NOV
`Exhibit 2007
`
`

`
`3,654,961
`
`1
`ROTARY PERCUSSION DRILL HAVING A
`HYDRAULICALLY ACTUATED PERCUSSION DEVICE
`
`CROSS REFERENCE TO RELATED APPLICATIONS
`
`This application is a division of U. S. application Ser. No.
`807,388, filed Mar. 14, 1969 and entitled “Rotary Percussion
`Drill Having a Hydraulically Actuated Percussion Device”
`now U.S. Pat. No. 3,547,206 issued Dec. 15, 1970.
`
`BACKGROUND OF THE INVENTION
`
`1 . Field of the Invention
`actuated
`a hydraulically
`to
`This
`invention
`relates
`reciprocating device and more particularly to a hydraulically
`actuated reciprocating piston percussion device with control
`means to supply fluid under pressure alternately to opposite
`faces of a piston.
`2. Description of the Prior Art
`In underground mines, the roof of the entries or tunnels are
`supported by expansion type roof bolts. The bolts are inserted
`in drilled holes that are arranged in predetermined spaced pat-
`terns. The drilling of the bolt holes consumes a substantial
`amount of time and contributes substantially to the overall
`cost of the mining operation. The bolt holes were, in the past,
`drilled by rotary drills and it was found by using a high rotary
`speed and imparting percussive forces to the drill rod, that it
`was possible to increase the rate of penetration of the drill rod
`and thus reduce the time required to drill the bolt holes. The
`percussive forces applied to the drill rod were imparted either
`by the conventional air type reciprocating devices well known
`in the percussive drill art or imparted by the action of eccen-
`tric weights. The use of air underground, especially in coal
`mines,
`is discouraged because the exhaust air adjacent the
`drill rod increases the dust hazards. There have been several
`proposals in the past of imparting the percussive forces to the
`drill rod by a hydraulically actuated device. To the best of my
`knowledge none of these devices have been commercially suc-
`cessful. There is a need, therefore, for a hydraulically actuated
`percussive device that may be used with a percussion drill or
`associated with a high speed rotary drill to impart percussive
`forces thereto.
`
`SUMMARY OF THE INVENTION
`
`The herein described invention relates to a hydraulically ac-
`tuated reciprocating piston. Hydraulic fluid under pressure is
`supplied alternately to the piston cylinder assembly on op-
`posite sides of the piston from a multi-valve control device to
`open and close the valve ports within the valve to supply pres-
`surized fluid alternately to opposite sides of the piston and to
`alternately vent the cylinder on opposite sides of the piston so
`that the timing device controlling the opening and closing of
`the valves thereby control the rate of reciprocation of the
`piston. The timing device may also be employed as a positive
`displacement pump to supply the fluid to the control valves.
`The piston cylinder assembly may be connected to either a
`percussive drill or to a high speed rotary drill to impart percus-
`sive forces to the rotating drill rod.
`The principal object of this invention is to provide a fluid
`actuated device that includes a multi-valve control device
`which alternately supplies fluid under pressure to opposite
`sides of a reciprocating piston within a cylinder.
`Another object of this invention is to provide a reciprocat-
`ing device wherein the timing device for supplying pressurized
`fluid to opposite sides of a reciprocating piston within a
`cylinder also functions as a positive displacement pump.
`Another object of this invention is to provide a reciprocat-
`ing device in which the cylinders on opposite sides of the
`piston are connected to pressure ports and vent ports of a
`multi-valve control device and accumulator devices are pro-
`vided to displace the excess fluid supplied to the cylinder.
`Another object of this invention is to provide a reciprocat-
`ing piston in which the cylinder is provided with a liquid shock
`absorbing means for the piston at opposite ends of its stroke.
`Another object of this invention is to provide a percussion
`drill with a hydraulically actuated percussion device.
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`70
`
`75
`
`2
`
`Another object of this invention is to provide a reciprocat-
`ing device wherein the volume of liquid displaced by a timing
`and metering device will correspond with the volume of liquid
`required to displace the piston in the cylinder for a complete
`stroke of the piston.
`These and other objects and advantages of this invention
`will be more completely disclosed and described in the follow-
`ing specification, the accompanying drawings and the ap-
`pended claims.
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`In the drawings:
`FIG. 1 is a view in elevation of the multi-valve control
`device illustrating the plurality of inlet and outlet ports for the
`pressure and vent valves and the timing device.
`FIG. 2 is a view in section taken along the line II—II of FIG.
`1 illustrating in detail the plurality of valves in their operative
`positions and the gears of the timing device.
`FIG. 3 is a view in section of a rotary percussion drill head
`with a cylinder housing the reciprocating piston and having
`pairs of openings on opposite sides of the piston.
`FIG. 4 is a view in section of the pressure accumulators il-
`lustrated in FIG. 1 connected to the vent or return conduit.
`FIG. 5 is a view in section taken along the line V—V of FIG.
`2 illustrating one of the pressure valves in open position.
`FIG. 6 is a view in section taken along the line VI—VI illus-
`trating one of the vent valves in a closed position.
`FIG. 7 is a view in section taken along the line VII——VIl in
`FIG. 2 illustrating in detail the timing gears that may also func-
`tion as a positive displacement pump.
`FIG. 8 is a view taken along the line VIII--VIII of FIG. 5 il-
`lustrating one of the rotary disc-like valve members with a
`peripheral flow recess passage through a portion thereof.
`FIG. 9 is a schematic view illustrating the motor driven
`valve where the timing device also functions as a positive dis-
`placement pump.
`FIG. 10 is a schematic view similar to FIG. 9 where the fluid
`under pressure is supplied from a separate source to the timing
`portion of the multi-valve control device. The timing gears are
`employed as a motor to open and close the respective valves.
`The rate of percussion imparted by the piston may be con-
`trolled with a flow control valve controlling the rate of flow to
`the timing gears.
`FIG. 11 is a schematic view similar to FIG. 9 in which
`separate drive means are provided for the timing device to
`open and close the respective valves. With this arrangement,
`the percussion rate can be varied over a wide range.
`FIG. 12 is a perspective view of pairs of the disc-like valve
`elements with shafting connecting axially aligned pairs of disc-
`like valve elements.
`FIG. 13 is a view partially in section of a percussion drill
`head with the cylinder housing and a reciprocating piston hav-
`ing pairs of openings on opposite sides of the piston.
`DESCRIPTION OF THE PREFERRED EMBODIMENT
`
`Referring to the drawings and particularly to FIG. 3, there is
`illustrated a drill head generally designated by the numeral 10
`that includes a cup-shaped housing 12 with an annular open
`top portion 14 and a base portion 16. The side wall of the
`housing 12 has an opening 18 in which bearings 20 are posi-
`tioned to support a rotatable shaft 22. A bevel gear 24 is con-
`nected to the shaft 22 within the housing 12. Suitable means,
`not illustrated, are arranged to rotate the shaft 22 and thus im-
`part rotation to a drill rod 26, as later explained. A top plate
`28 encloses the housing opening 14 and is secured to the hous-
`ing 12 by means of bolts 30. The plate 28 has an upstanding
`annular collar portion 32 with an annular passageway 34 con-
`nected to an outlet opening 36 for removing the dust and
`cuttings conveyed through the internal passageway 38 of the
`drill rod 26.
`Positioned within the housing 12 is a drill rod support
`member 40 that has a base portion 42 and a cylindrical side
`wall 44. A bevel gear 46 is secured to the outer portion of the
`
`NOV
`
`Exhibit 2007
`
` NOV
`Exhibit 2007
`
`

`
`3
`
`4
`
`3,654,961
`
`cylindrical wall 44 and meshes with the bevel gear 24 to
`thereby rotate the drill rod support 40 within the housing 12.
`Suitable thrust bearings 48, 50 and 52 are arranged between
`the housing 12 and the drill rod support member 40 to permit
`rotation of the drill rod support member relative thereto. The 5
`upper portion of the drill rod support member has a socket 54
`for receiving a drill rod therein. The drill rod, however, is free
`to move axially in the socket 54 so that percussive forces im-
`parted thereto are transmitted through the drill rod to a drill
`bit connected to the opposite end thereof.
`The drill rod support member 40 has an opening 56 in the
`base portion 42 in which there is positioned a bearing 58. The
`support member 40 has an axial passageway 60 therethrough
`aligned with the opening 56 in which there is positioned a
`hammer shaft 62. The end portion 64 of the hammer shaft 62
`extends through the opening 56 in the support member 40 into
`the inner portion of housing 12. The hammer shaft 62 has an
`enlarged other end portion 66 which is positioned in the upper
`portion of the drill rod support member and is in abutting_rela-
`tion with the base of the drill rod 26 and is operable upon axial
`reciprocatory movement to impart percussive strokes to the
`drill rod 26.
`
`10
`
`15
`
`20
`
`25.
`
`30
`
`35
`
`40
`
`45
`
`continually urged against the base of the hole being drilled by
`the drilling machine, the drill rod 26 and hammer shaft 62 are
`moved downwardly within the drill rod support 40 when the
`piston 92 is moved downwardly within the cylinder 68. Thus,
`each upwardly movement of the piston 92 imparts an up-
`wardly percussive blow to the drill hammer 62 which is, in
`turn, transmitted to the drill rod 26. Positive fluid pressure is
`employed to move the piston 92 downwardly away from the
`drill hammer end portion 64.
`The cylinder body portion 70 has an upper inlet port 118
`opening into the cylindrical passageway 78 within the body
`portion 70 and an upper outlet -port 120. It should be noted in
`the particular embodiment illustrated, the inlet port 118 and
`outlet port 120 both communicate with the cylindrical
`chamber 78. An inlet conduit 122 is connected to inlet port
`118 and vent conduit 124 is connected to outlet port 120.
`Similarly, the cylinder 68 has a lower inlet port 126 below the
`piston 92 and an outlet port 128. Conduits 130 and 132 are
`connected to the respective inlet and outlet ports 126 and
`128. With this arrangement, fluid supplied through inlet con-
`duit 122 will fill the annular chamber between the cylindrical
`intermediate shaft portion 102 and the cylindrical walls of
`chamber 78 and displace or move
`the
`cylinder 92
`downwardly. Since the lower portion of the cylinder is vented
`through outlet conduit 132, fluid remains in the annular
`chamber between the shaft 112 and the cylindrical wall of
`chamber portion 86. The intermediate shaft member 104 has
`a shoulder or secondary piston face 135 that contacts the fluid
`within the annular chamber designated by the numeral 134
`and, with the clearance between the surface of intermediate
`shaft portion 104 and wall 86,
`the fluid slowly flows
`therebetween and prevents metal to metal contact on the up-
`ward and downward strokes of the piston.
`Referring to FIGS. 1 and 2, there is illustrated a multi-port
`control device generally designated by the numeral 136 that
`has an upper vent valve 138, an upper pressure valve 140, a
`lower pressure valve 142, a lower vent valve 144 and a timing
`device pump combination 146. The upper vent valve 138 has
`a port 148 to which conduit.l24 is connected. The other end
`of conduit 124 is connected to vent port 120 of cylinder 68
`(FIG. 3). A pressure accumulator generally designated by the
`numeral 150 is connected in series with the conduit 124 and
`port 148. The upper pressure valve 140 has a port 152. Con-
`duit 122 is connected to port 152 and to port 118 of the
`cylinder 68 (FIG. 3).
`The lower pressure valve 142 has a port 154 connected to
`conduit 130. The other end of conduit 130 is connected to the
`lower pressure port 126 in cylinder 68. The lower vent valve
`144 has a port 156 that is connected to conduit 132. The other
`end of conduit 132 is connected to the lower vent port 128 in
`cylinder 68. A pressure accumulator 158 is connected in se-
`ries with the conduit 132 and port 156 of vent valve 144.
`The multi-valve control device 136 includes an end plate
`160 with a plurality of longitudinal bolt passageways 162
`therethrough adjacent the circumferential edge portion and a
`, pair of recessed cup-shaped portions 164 and 166. Annular
`bearings 168 and 170 are positioned in the recessed portions
`164 and 166. The upper vent valve 138 includes a pair of disc-
`like valve members 172 and 174 with peripheral grooved por-
`tions 176 and 178 extending around about 180° to 190° of the
`periphery. The member 172 has oppositely extending shaft
`end portions 180 and 182. The shaft end portion 180 is posi-
`tioned in the bearing 168 in recess 164. Similarly, the member
`174 has oppositely extending shaft end portions 184 and 186.
`The shaft end portion 184 is rotatably positioned in bearing
`170 in recessed portion 176. An annular valve housing 188
`having port 148 therein extends around the pair of disc-like
`members 172 and 174 and has a central chamber therein. The
`housing is similar to that illustrated in FIGS. 5 and 6. The
`valve housing 188 has longitudinally extending bolt apertures
`190 aligned with the bolt apertures 162. The valve housing has
`one planar end wall 192 in abutting relation with a mating end
`wall of the end plate 160 to form a seal therebetween. A sup-
`
`A cylinder generally designated by the numeral 68 has a
`body portion 70 and end flange members 72 and 74. The end
`flanges 72 and 74 are secured to the body portion 70 and to
`the housing base portion 16 by means of bolts 76 and are axi-
`ally aligned with the hammer shaft 62. The body portion 70
`has an inner cylindrical chamber 78 with an upper annular
`shoulder portion 80 and a lower annular shoulder portion 82
`that provides upper and lower cylindrical chamber portions 84
`and 86 of reduced diameter. Positioned within the cylindrical
`chamber portions of reduced diameter are annular bearings
`88 and 90. A piston generally designated 92 has an annular
`recessed portion 94 in which a piston ring 96 is positioned.
`The piston 92 has substantially the same diameter as the cylin-
`drical chamber 78 of cylinder 68 so that fluid under pressure
`acting on the upper annular surface 98 of piston 92 moves the
`piston 92 downwardly in the body portion 70. Similarly, fluid
`pressure acting on the lower annular surface 100 moves the
`piston upwardly within the cylinder body portion 78.
`The piston 92 has a pair of oppositely extending cylindrical
`shafts with intermediate portions 102 and 104. The diameter
`of the intermediate portions 102 and 104 is substantially the
`same as the diameter of the cylindrical chamber portions 84
`and 86. There is approximately .002 inch clearance between
`the surfaces of intermediate portions 102 and 104 and the
`inner cylindrical wall of chamber portions 84 and 86. With
`this arrangement, as the cylinder 92 is reciprocated so that the
`intermediate shaft portions 102 or 104 are moved into the
`cylindrical chamber portions 84 or 86, the fluid entrapped
`within the chamber portions serves as a liquid cushion for the
`piston. Because of the slight clearance between the inter-
`mediate shaft portions l02 or 104 and the side walls of the
`chamber portions 84 and 86, the fluid is slowly displaced to
`thereby provide a fluid cushion for the piston 92. There are
`provided passageways 106 and 108 in the flanges 72 and 74 to
`receive and return to the tank, the fluid that has leaked past
`the bearings 88 and 90.
`The oppositely extending shafts of piston 92 have end shaft
`portions 110 and 112 extending therefrom. The end shaft por-
`tions are suitably positioned in the annular bearings 88 and 90
`to maintain the piston 92 axially aligned within the cylinder
`68. The shaft end portion 110 extends through an opening 114
`in the drill head housing bottom portion 16 and has an end
`surface 116 in abutting relation with the end portion 64 of
`hammer shaft 62. With this arrangement, upward movement
`imparted to the piston 92 is transmitted through the shaft end
`portion 110 to the end surface 116 which, in turn, strikes the
`end portion 64 of hammer shaft 62 and moves the hammer
`shaft upwardly within the drill rod support member 40. Since
`the upper portion 66 of hammer shaft 62 is in abutting relation
`with the base of drill rod 26, this upwardly percussive force or
`motion is transmitted to the drill rod 26. Since the drill rod is 75
`
`50
`
`55
`
`60
`
`65
`
`70
`
`NOV
`
`Exhibit 2007
`
` NOV
`Exhibit 2007
`
`

`
`3,654,961
`
`5
`
`port housing 194 has a plurality of bolt passageways 196
`aligned with bolt passageways 190 and 162 and has a pair of
`longitudinal passageways 198 and 200 with enlarged end por-
`tions 202 and 204 adjacent the opposite end wall 207 of valve
`housing 188. Bearings 206 and 208 are positioned in enlarged
`portions 202 and 204 and shaft end portions 182 and 186 of
`disc-like valve members 172 and 174 are rotatably supported
`in the bearings 206 and 208. The passageways 198 and 200
`have enlarged portions 210 and 212 in which bearings 214 and
`216 are positioned.
`The upper pressure valve 140 has a pair of disc-like valve
`members 218 and 220 which are similar to the disc-like valve
`members 172 and 174 previously described. The disc-like
`valve member 218 has a shaft portion 222 positioned in the
`recessed portion 210 of support member 194 and disc-like
`valve member 220 has a shaft end portion 224 positioned in
`the enlarged portion 212. The disc-like valve members 218
`and 220 have recessed peripheral portions 226 and 228
`similar to the recessed portions 176 and 178 that extend
`around 190° of the periphery of both of the valve members
`218 and 220. The shaft end portions 182 and 222 have axial
`passageways 230 and 232 therein with suitable keyways 234
`and 236. A shaft 238 is positioned in the passageway 198 of
`support member 194 and extends into the recessed portions
`230 and 232 and is suitably keyed to the end shaft 182 and
`230 so that valve members 172 and 218 rotate in timed rela-
`tion to each other.
`The disc-like valve member 220 is similarly connected to
`disc-like valve member 174 by means of shaft 240 keyed to
`the shaft end portions 186 and 224. As illustrated in FIG. 2,
`the upper vent valve 138 is open in that the peripheral
`recessed portions 176 and 178 are facing each other and in
`overlying relation to form a passageway therebetween. The
`upper pressure valve 140 is closed in that the recessed por-
`tions 226 and 228 are spaced from each other. The upper
`pressure valve 140 has an external housing 242 which is
`similar in construction to the external housing 188 of the vent
`valve 138. The housings 188 and 242 and the disc-like valve
`members housed therein are interchangeable.
`Abutting the wall of valve housing 242 is a support member
`244 which is similar to the support member 194 and is in-
`terchangeable therewith. The support member 244 has
`passageways 246 and 248 extending therethrough in which
`shafts 250 and 252 are positioned and extend into recessed
`portions within the shaft end portions of disc-like valve mem-
`bers 218 and 220.
`The lower pressure valve 142 is positioned adjacent the sup-
`port member 244 and has a housing 254 which is similar to the
`housings 242 and 188. Within the housing 254 there are posi-
`tioned a pair of disc-like valve members 256 and 258 which
`have peripheral recessed portions 260 and 262. The disc-like
`valve members 256 and 258 are of the same construction as
`the previously described disc-like valve members and have
`shaft end portions 264 and 266, 268 and 270. The shaft end
`portions 264 and 268 extend into enlarged passageways in the
`support member 244 and have recessed portions 272 and 274
`in which the shafts 250 and 252 are positioned and non-
`rotatably keyed thereto so that the disc-like valve members
`256 and 258 rotate in timed relation with the other previously
`described disc-like valve members. A support member 276
`similar to support members 244 and 194 is positioned in
`abutting relation with the upper pressure valve housing 254
`and has passageways 278 and 280 therethrough in which
`shafts 282 and 284 are positioned. The shafts 282 and 284 ex-
`tend into recessed portions of disc-like valve member shaft
`end portions 266 and 270 and are keyed thereto.
`The lower vent valve 144 has a housing 286 in which a pair
`of disc-like valve members 288 and 290 are positioned with
`recessed peripheral portions 292 and 294. The disc-like valve
`members have shaft end portions 296, 298, 300 and 302. All
`of the shaft end portions have recessed portions therein and
`shafts 282 and 284 extend into the recessed portion of shaft
`end portions 296 and 300 and are keyed therein to rotatably
`
`5
`
`l0
`
`15
`
`20
`
`30
`
`35
`
`40
`
`45
`
`6
`connect the disc-like valve members 288 and 290 to the disc-
`like valve members 256 and 258 and the other previously
`described valve members. It should be noted that the disc-like
`valve members 256 and 258 of the lower vent valve have their
`recessed portions 260 and 262 abutting each other to form a
`passageway therebetween so that the lower vent valve as illus-
`trated in FIG. 2 is open, whereas the lower pressure valve 144
`is closed because the recessed portions 292 and 294 are
`spaced from each other.
`FIG. 12 illustrates in detail the manner in which the pairs of
`disc-like valve members 256 and 258 are connected to the ad-
`jacent pair of disc-like valve members 288 and 290 by means
`of the shafts 282 and 284. It should be understood that the
`disc-like valve members may have either a longitudinal bore
`therethrough or recessed portions to receive end portions of
`the shafts therein. The plurality of shafts connecting the ad-
`jacent axially aligned disc-like valve members may be referred
`to as shafting connecting the respective disc-like valve mem-
`bers.
`Another support member 304 is positioned in abutting rela-
`tion with the valve housing 286 and is similar in construction
`to the previously described support members. The support
`' member 304 has passageways 306 and 308 in which shafts 310
`25
`and 312 are positioned. The shaft 310 extends into a recessed
`portion of shaft end portion 298 and is keyed therein.
`Similarly, shaft 312 extends into a recess in shaft end portion
`302 and is also keyed therein.
`The combination timing device and positive displacement
`pump 146 has a housing 314 positioned in abutting relation
`with the support member 304. The housing has longitudinal
`bolt passageways 316 and a pair of meshing gears 318 and 320
`are positioned in the housing 314. The gear 318 has shaft end
`portions 322 and 324. Similarly, the gear 320 has shaft end
`portions 326 and 328. The shaft end portions 322 and 326 are
`positioned in the enlarged portions of passageways 306 and
`308 and shaft 310 and 312 extend into recessed portions of
`the respective gears 318 and 320 and are keyed thereto so that
`gears 318 and 320 are connected to the previously described
`disc-like valve members.
`An end plate 330 has bolt receiving apertures 332 and a
`cup-shaped recessed portion 334 for receiving the shaft end
`portion 324 of gear 318. The end plate 330 has a passageway
`336 with an enlarged portion 338. The shaft end portion 328
`of gear 320 is supported in the enlarged portion 338 of
`passageway 336. A drive shaft 340 has an end portion extend-
`ing into an axial passageway 342 of gear 320 and is keyed
`thereto so that rotation of shaft 340 rotates both gears 318 and
`320 and by the previously described connections all of the
`disc-like valve members within the multi-port control device
`136. The end plate 330 has a motor mounting bracket 344
`thereon arranged to support a drive motor or the like con-
`nected to the shaft 340. It should be understood, however, the
`use of the shaft 340 as a driving means is optional, as later
`described.
`The previously described valve members are positioned in
`stacked relation as illustrated in FIGS. 1 and 2 and are secured
`in this position by the elongated bolts 346 extending through
`the bolt apertures previously described. Referring to FIG. 1,
`the support member 194 has an outlet port 348 therein and an
`internal passageway 350 that is connected to an internal
`passageway 352 in the upper vent valve housing 188. The sup-
`port member 244 has a port 354 that opens into passageway
`356. The passageway 356 is connected to passageways 358
`and 360 in valve housings 242 and 254 of the upper and lower
`pressure valves 140 and 142 respectively. The support
`member 276 has a port 362 opening into passageway 364
`which is connected to a passageway 366 in the housing 280 of
`lower vent valve 144. The support member 304 has a pair of
`ports 368 and 370 that open into respective passageways 372
`and 374. The housing 314 has passageways 376 and 378 that
`are connected to the passageways 37-2 and 374 respectively.
`As previously stated, the valves 138, 140, 142 and 144 are
`of similar construction and some of the elements thereof are
`
`50
`
`55
`
`60
`
`65
`
`70
`
`75
`
`NOV
`
`Exhibit 2007
`
` NOV
`Exhibit 2007
`
`

`
`3,654,961
`
`8
`
`7
`interchangeable. Similarly, the support members 194 and 276
`are of similar construction and are interchangeable. The sup-
`port member 244 differs from support members 194 and 276
`in that the passageway 356 opens into both valves 140 and
`142. The support member 304 also has a pair of ports 368 and
`370 and passageways 372 and 374.
`FIG. 5 is a sectional view in elevation of the lower pressure
`valve 142 and illustrates the housing 254 with the peripheral
`bolt passageways for bolts 346 and the disc-like valve mem-
`bers 256 and 258 with the peripheral recessed portions 260
`and 262. In FIG. 5, the recessed portions 260 and 262 are il-
`lustrated as extending around 180° of the disc-like valve
`member periphery. In FIG. 6, however, the recessed portions
`292 and 294 are, for illustrative purposes, illustrated as ex-
`tending around about 190° of the disc-like valve member
`periphery. It is preferred to have the same peripheral recessed
`portion for all of the disc-like valve members so that the plu-
`rality of valves will open and close in timed relation. Where
`the recessed portions extend around 180° of the periphery, the
`volume of liquid displaced by the timing gears 318 and 320 in
`one-half a revolution should be about 10 percent greater than
`the volume of liquid required to displace the piston in the
`cylinder for a complete stroke of the piston. The excess fluid
`enters an accumulator in the conduit connecting outlet port
`370 from the timing device pump combination 146 and the
`inlet port 354 for pressure valves 140 and 142. The accumula-
`tor is not shown but may be similar to the accumulators 150 or
`158. With this arrangement, an accumulator must be provided
`in the conduit between ports 370 and 354 because all of the
`valves in the control device are closed and the excess volume
`of fluid supplied by the timing device pump combination 146
`must be displaced in the accumulator.
`Where the recessed portions extend around 190°, the accu-
`mulator in the conduit connecting ports 370 and 354 is not
`necessary because there is an overlap where both pressure
`valves 140 and 142 are open for about 10° of the revolution.
`The metering gears should, however, be made larger to com-
`pensate for the loss of fluid while all valves are open during the
`10° overlap. The dimension of the timing gears and the piston
`and cylinder may be varied to control the amount of fluid‘en-
`tering the accumulator 150 and the resilience of the spring
`394 may be varied to control the force exerted by the piston in
`the cylinder.
`In FIG. 5, the ports 154 and passageway 360 communicate
`through the mating recessed portions 260 and 262 of the disc-
`Iike valve members 256 and 258 when positioned as illustrated
`in FIG. 5 so that liquid supplied to passageway 360 flows
`through the openings formed by the mating recessed portions
`260 and 262 to the port 154. The disc-like valve member 256
`is illustrated in FIG. 8 with the recessed portion 260 and the
`shaft end portions 264 and 266. The shaft 250 is illustrated as
`extending into a recessed portion of shaft end portion 264 and
`is keyed therein. Similarly,
`the shaft 282 extends into a
`recessed portion of shaft end portion 266 and is keyed thereto.
`FIG. 6 is a sectional view in elevation of the lower vent valve
`144 and illustrates th