MEYER PRODUCTS, LLC.
`
`EXHIBIT 1003
`
`U.S. Patent No. 2,242,472 to Keeler
`
`

`
`May 20, 1941;
`M33’ 20» 1941-A
`
`R. w. KEEl-ER'
`R. w. KEE_LER'
`SNOW PLOW
`SNOW PLOW
`
`Filed June 25, 1938
`Filed June 23, 1938
`
`2,242,472
`2,242,472
`
`7 Sheets-Sheet 1
`7 Sheets-Sheet 1
`
`Q. E L E E K, W D N O W 2
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`

`
`May 20, 1941.
`May 20, 1941.
`
`R. w. KEELER
`R, w_ KEELER
`SNOW PLOW
`SNOW PLOW
`
`2,242,472
`2,242,472
`
`Filed June 23, 1958
`Filed June 23, 1958
`
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`
`7 Sheets-Sheet 2
`7 Sheets-Sheet 2
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`QAYMOND W. KEELEE.
`QAYMOND W. KEELEI2.
`BYQKM.
`
`A773/.
`
`

`
`May 20, 1941-
`May 20. 1941-
`
`R. w. KEELER
`R. w. KEELER
`SNOW PLOW
`SNOW PLOW
`
`2,242,472
`2,242,472
`
`Filed June 23, 1938
`Fil'ed June 23, 1938
`
`7 Sheets—Sheet 5
`7 Sheets-Sheet 3
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`May 20, 1941.
`
`R. W. KEELER
`
`SNOW PLOW
`
`2,242,472 .
`
`Filed June 23, 1938
`
`7 Sheets—Sheet 4
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`May 20, 1941.
`May 20, 1941.
`
`R, w, KEELER
`R. W. KEELER
`snow PLOW
`SNOW PLOW
`
`2,242,472
`2,242,472
`
`Filed June 23, 1938
`Filed June 23, 1938
`
`7 shee?-sheet 5
`7 sheets-sheet 5
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`

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`May 20, 1941.
`
`-R.Vl KEELER
`- R. W. KEELER
`SNOW PLOW
`SNOW PLOW
`Filed June 23, 1938
`Filed June 23, 1938
`
`2,242,472
`2,242,472
`
`7 Sheets—Sheet 6
`7 Sheets-Sheet 6
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`5‘"‘&/.4. 777.
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`ATTY
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`

`
`May 20, 1941.
`May 20, 1941.
`
`R. w. KEELER
`R_ w, KEELER
`
`.
`
`A
`
`2,242,472
`2,24-2,4.7_2
`
`SNOW PLOW
`SNOW PLOW
`
`_
`I
`
`Filed June 23, 1958
`Filed June 23, 1938
`
`_
`
`'7 Shea-ts—Sheet 7.
`'7 Sheets-Sheet 7.
`
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`‘AKQKW
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`[NI/ENTOP}
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`PAYMOND W; KEELEQ,
`DAYMOND W..KEE1_EI2,
`
`A773/.
`
`

`
`Patented May 20, 1941
`Patented May 20, 1941
`
`2,242,472
`2,242,472
`
`5
`
`10
`10
`
`20
`
`UNITED \STATES - PATENT OFFICE
`UNITED ‘STATES - PATENT OFFICE
`2,242,472
`2,242,472
`SNOW PLOW
`SNOW PLOW
`.
`Raymond W. Keeler, Gallon, Ohio, assignor to The
`Raymond W. Keeicr, Gallon, Ohio, asslgnor to The
`Galion Iron Works & Manufacturing Company,
`Galion Iron Works & Manufacturing Company,
`a corporation of Ohio
`a corporation of Ohio
`Application June 23, 1938, Serial No. 215,440
`Application June 23, 1938, Serial No. 215,440
`10 Claims.
`(01. 37-42)
`10 Claims.
`(01. 37-42)
`This invention relates to a new and improved
`This invention relates to a new and improved
`line 9-9 of Fig. 8 looking in the direction of
`line 9—9 of Fig. 8 looking in the direction of
`type of snow plow or similar equipment in which
`type of snow plow or similar equipment in which
`the arrows;
`'
`b
`the arrows;
`'
`t
`the plow or blade is positioned in front of a
`the plow or blade is positioned in front of a
`Fig. 10 is a plan view of the control valve of
`Fig. 10 is a plan view of the control valve of
`tractor to remove snow or to grade a road.
`the hydraulic system and the operating mecha-
`tractor to remove snow or to grade a road.
`the hydraulic system and the operating mecha
`An object of the invention is to provide an
`An object of the invention is to provide an
`nism therefor, the operating handle being broken
`nism therefor, the operating handle being broken
`away;
`improved snow plow construction which is oper-
`improved snow plow construction which is oper
`away;
`ated by a tractor in which there _are power oper-
`Fig. 11 is a longitudinal sectional elevational
`ated by a tractor in which there are power oper
`Fig. 11 is a longitudinal sectional elevational
`ated means comprising hydraulically controlled
`ated means comprising hydraulically controlled
`view taken on the line ll—ll of Fig. 10 looking
`view taken on the line H-ll of Fig. 10 looking
`means for adjusting the position of the snow
`in the direction of the arrows:
`means for adjusting the position of the snow
`in the direction of the arrows;
`plow.
`plow.
`Fig. 12 is a transverse sectional elevational
`Fig. 12 is a transverse sectional elevational
`Another object of the invention is to provide
`Another object of the invention is to provide
`view taken on the line I2-—l2 of Fig. 10 looking
`view taken on the line I2--l2 of Fig. 10 looking
`an improved control means for a snow plow
`in the direction of the arrows;
`an improved control means for a snow plow
`in the direction of the arrows;
`including a hydraulic system, the pump of which
`including a hydraulic system, the pump of which
`Figs. 13, 14, 15 and 16 are diagrammatic repre-
`Figs. 13, 14, 15 and 16 are diagrammatic repre
`may be selectively connected to be driven from
`sentations of the hydraulic control system show-
`may be selectively connected to be driven from
`sentations of the hydraulic control system show
`ing four operating, conditions encountered in
`or disconnected from the motor of the tractor
`or disconnected from the motor of the tractor
`ing four operatingv conditions encountered in
`associated with the snow plow.
`actual practice, Fig. 13 being the no-load condi-
`associated with the snow plow.
`actual practice, Fig. 13 being the no-load condi
`Still another object of the invention is to pro-
`tion of the system, Fig. 14 being the condition
`Still another object of the invention is to pro
`tion of the system, Fig. 14 being the condition
`vide a snow plow attachment to a tractor and
`when the snow plow is being lowered, Fig. 15
`vide a snow plow attachment to a tractor and
`when the snow plow is being lowered, Fig. 15
`means for readily adjusting the position of the
`means for readily adjusting the position of the
`being the condition when the snow plow is being
`being the condition when the snow plow is being
`snow plow from the operator's position of the
`raised, and Fig. 16 being the condition when the
`snow plow from the operator's position of the
`raised, and Fig. 16 being the condition when the
`tractor.
`hydraulic piston motor has reached one extreme
`tractor.
`hydraulic piston motor has reached one extreme
`A further object of the invention is to provide
`position of expansion;
`position of expansion;
`A further object of the invention is to provide
`improved and rugged snow plow supporting and
`Fig. 17 is a plan View "of a modified form of
`improved and rugged snow plow supporting and
`Fig. 17 is a plan view 'of a modi?ed form of
`operating means which provide for very flexible
`supplemental frame for supporting and attach-
`operating means which provide for very ?exible
`supplemental frame for supporting and attach
`control of the snow plow while at the same time
`control of the snow plow while at the same time
`ing the snow plow to the main frame; and
`ing the snow plow to the main frame; and
`providing a simple and efiicient construction.
`Fig. 18 is a side elevational view of the mecha-
`providing a simple and ei’?cient construction.
`Fig. 18 is a side elevational view of the mecha
`nism of Fig. 17.
`Other objects of
`the invention will_ appear
`nism of Fig. 17.
`Other objects of the invention will_ appear
`hereinafter, the novel features and combinations
`Referring particularly to Figs.‘ 1 to 5, inclusive,
`hereinafter, the novel features and combinations
`Referring particularly to Figs.‘ 1 to 5, inclusive,
`being set forth in the appended claims.
`being set forth in the appended claims.
`of the drawings, it will be seen that my invention
`of the drawings, it will be seen that my invention
`In the accompanying drawings,
`In the accompanying drawings,
`comprises a tractor 20 which is essentially a com-
`comprises a tractor 20 which is essentially a com
`Figs. 1 and 2 combine to make a side eleva-
`mercial form of tractor having a self-contained
`Figs. 1 and 2 combine to make a side eleva
`mercial form of tractor having a self-contained
`tional view of
`the apparatus comprising my
`unitary tractor frame 2| which is formed as a
`tional view of the apparatus comprising my
`unitary tractor frame 2| which is formed as a
`invention, Fig. 2 being an extension along the
`invention, Fig. 2 being an extension along the
`unit with the rear axle housing, gear housing
`unit with the rear axle housing, gear housing
`line 2-2 of Fig. 1;
`line 2-2 of Fig. 1;
`and crank case of the tractor motor, which is
`and crank case of the tractor motor, which is
`Fig. 3 is a side elevational View of the mecha-
`carried under the hood 22. The tractor is pro-
`Fig. 3 is a side elevational view of the mecha
`carried under the hood 22. The tractor is pro
`nism of Figs. 1 and 2 shown detached from the
`nism of Figs. 1 and 2 shown detached from the
`vided with the usual radiator 23, headlights 24,
`vided with the usual radiator 23, headlights 24,
`tractor;
`tractor;
`fuel tank 25, cab 26, seat 21 and steering wheel
`fuel tank 25, cab 26, seat 21 and steering wheel
`Fig. 4 is a plan view of the apparatus of Fig. 3
`28 which steers the front operating wheels 29
`Fig. 4 is a plan view of the apparatus of Fig. 3
`28 which steers the front operating wheels 29
`after the hydraulic control system generally has
`after the hydraulic control system generally has
`provided with pneumatic tires and carried upon
`provided with pneumatic tires and carried upon
`been removed;
`front axle 30. Said tractor 20 also includes pneu-
`been removed;
`front axle 30. Said tractor 20 also includes pneu
`Fig. 5 is an enlarged detail view of a portion
`matically tired ground engaging traction wheels
`Fig. 5 is an enlarged detail view of a portion
`matically tired ground engaging traction wheels
`of the supplemental frame comprising the at-
`3| and a‘ gear shift lever 32.
`of the supplemental frame comprising the at
`3| and a gear shift lever 32.
`tachment which connects the snow plow and the
`tachment which connects the snow plow and the
`To provide for the attaching of a snow plow
`To provide for the attaching of a snow plow
`tractor;
`or other scraper blade to the tractor 20 so as to
`tractor;
`or other scraper blade to the tractor 20 so as to
`Fig. 6 is an enlarged end elevational view show-
`operate ahead thereof, I provide a main frame
`Fig. 6 is an enlarged end elevational view show
`operate ahead thereof, I provide a main frame
`ing the method of mounting the rear end of the
`33 comprising a pair of rearwardly positioned
`ing the method of mounting the rear end of the
`33 comprising a pair of rearwardly positioned
`main attaching frame to the tractor;
`angularly extending angle members 34 which at
`angularly extending angle members 34 which at
`_ main attaching frame to the tractor;
`Fig. 7 is a longitudinal sectional elevational
`Fig. 7 is a longitudinal sectional elevational
`their rear ends are provided with upwardly ex-
`their rear ends are provided with upwardly ex
`view showing the drive means for the tractor
`tending plates 35 each of which is adapted to
`tending plates 35 each of which is adapted to
`view showing the drive means for the tractor
`and particularly a gear which is employed to
`be pivotally attached between a pair of down-
`and particularly a gear which is employed to
`be pivotally attached between a pair of down
`drive the pump of the hydraulic system;
`drive the pump of the hydraulic system;
`wardly extending lugs 36 by a pin 31 removably
`wardly extending lugs 38 by a pin 3'! removably
`Fig. 8 is a transverse sectional elevational view
`held in place by cotter keys 38, as shown in Fig. 6.
`Fig. 8 is a transverse sectional elevational view
`held in place by cotter keys 38, as shown in Fig. 6.
`taken substantially on the line 8-8 of Fig. 7 and
`The depending lugs 36 may be integral with the
`taken substantially on the line 8—8 of Fig. 7 and
`The depending lugs 36 may be integral with the
`enlarged, looking in the direction of the arrows;
`enlarged, looking in the direction of the arrows;
`rear tractor axle housing 36’ or they may be
`rear tractor axle housing 36' or they may be
`Fig. 9 is a sectional plan view taken on the
`rigidly secured thereto by means of U-bolts.
`Fig. 9 is a sectional plan view taken on the
`rigidly secured thereto by means of U-bolts.
`
`30
`30
`
`35
`35
`
`40
`40
`
`45
`45
`
`50
`50
`
`55
`55
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`

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`described.
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`7
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`10
`10
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`15
`15
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`30
`30
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`2
`2
`2,242,472
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`2,242,472
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`Extending transversely between the angle
`Extending transversely between the angle
`otally attached to the lower portion of one of the ‘
`otally attached to the lower portion of one of the '
`members 34 is a cross-bar 39 having holes 40 at
`aforementioned angle members 55 by a pivot pin
`aforementioned angle members 56 by a pivot pin
`members 34 is a cross-bar 39 having holes 46 at
`61 one end of which is carried.by said angle
`opposite ends thereof adapted to receive hang
`opposite ends thereof adapted to receive hang
`61 one end of which is carriedby said angle
`member 55 and the other end of which is car-
`rods 4| (see Figs. 1 and 3) which are attached
`member 56 and the other end of which is ,car
`rods 4| (see Figs. 1 and 3) which are attached
`ried by the forward extension 53 of the vertical
`at their tops to brackets 42 secured to and carried
`ried by the forward extension 56 of the vertical
`at their tops to brackets 42 secured to and carried
`flange of an angle 45 of the main frame 33. Ap-
`by the body of the tractor 20. The hang rods
`?ange of an angle 45 of the main frame 33. Ap
`by the body of the tractor 26. The hang rods
`propriate removable cotter keys 69 are provided
`4| are provided with double lockingnuts 43 at
`propriate removable cotter keys 66 are provided
`4| are provided with double locking'nuts 43 at
`to maintain the pivot pin 51 in position.
`to maintain the pivot pin 61 in position.
`each «end to provide for adiustment of the effec-
`each end to provide for adiustment of the effec
`Each of the castings 55 is bifurcated at its
`tive length thereof. At their forward ends the
`Each of the castings 65 is bifurcated at its
`tive length thereof. At their forward ends the
`forward end to provide spaced arms 10 and ‘II
`angle members 34 are attached ‘to a transverse
`forward end to provide spaced arms 16 and 1|
`angle members 34 are attached ‘to a transverse
`adapted to receive pivot pin 12 which extends
`angle member 44. The_ elements just described
`adapted to receive pivot pin 12 which extends
`angle member 44. The. elements just described
`between reinforcing ribs 13, 13 rigidly attached
`as part of the main frame 33 form the rear por-
`between reinforcing ribs 13, 13 rigidly attached
`as part of the main frame 33 form the rear por
`tion thereof which is pivotally attached to a
`to and forming part of the snow plow 64. Ap
`to and forming part of the snow plow 84. Ap-
`tion thereof which is pivotally attached to a
`front portion for pivotal movement about a hori-
`propriate cotter keys 14, 14 are provided to main-
`propriate cotter keys 14, 14 are provided to main
`front portion for pivotal movement about a hori
`zontal longitudinally extending axis now to be
`tain the pivot pin 12 removably in place.
`tain the pivot pin 12 removably in place.
`zontal longitudinally extending axis now to be
`described.
`—
`»
`As clearly seen by reference to Fig. 4 of the
`As clearly seen by reference to Fig. 4 of the
`Said front portion of the main frame 33 com-
`drawings, a pair of cross rods 15 extend diagon-
`drawings, a pair of cross rods 15 extend diagon
`Said front portion of the main frame 33 com
`prises a pair of substantially longitudinally ex-
`ally across and between the castings 55, 55 and
`prises a pair of substantially longitudinally ex
`ally across and between the castings 65, 65 and
`tending angle members 45 which are rigidly at-
`rigidly attach them together thus insuring their
`tending angle members 45 which are rigidly at
`rigidly attach them together thus insuring their
`tached near their front ends to the axle 30 of
`20
`pivotal movement substantially in unison,
`the
`pivotal movement substantially in unison, the
`tached near their front ends to the axle 36 of
`20
`the tractor 20 by U-bolts 46. At their rear ends
`rods being bolted or riveted together where they
`rods being bolted or riveted together where they
`the tractor 26 by U-bolts 46. At their rear ends
`the angle members 45 are attached to a trans-
`cross each other and the ends of the rods being
`cross each other and the ends of the rods being
`the angle members 45 are attached to a trans
`verse angle member 41 between which and the
`bolted or riveted to the castings.
`bolted or riveted to the castings.
`verse angle member 41 between which and the
`In addition to the pivotal connection above
`afore-described angle member 44 is positioned a
`In addition to the pivotal connection above
`afore-described angle member 44 is positioned a
`described between the auxiliary frame 63 and the
`25
`spacer plate 43. A horizontally positioned lon-
`spacer plate 46. A horizontally positioned lon
`described between the auxiliary frame 63 and the
`25
`gitudinally extending bolt 49 passes through the
`snow plow 54, further resilient connecting means
`gitudinally extending bolt 46 passes through the
`snow plow 64, further resilient connecting means
`upright webs of the angle members 44 and 41
`16, 16 are provided to maintain the slope of the
`16, 16 are provided to maintain the slope of the
`upright webs of the angle members 44 and 41
`leading face of the snow plow or grader blade
`and through the plate 48 to provide the afore-
`and through the plate 46 to provide the afore
`leading face of the snow plow or grader blade
`described pivotal connection between the front
`in any desired position. Said connecting means
`in any desired position. Said connecting means
`described pivotal connection between the front
`15, 15 are of similar construction and each com-
`and rear portions of the main frame 33. A heli-
`16, 16 are of similar construction and each com
`and rear portions of the main frame 33. A heli
`prises a yoke 11 pivotally attached by a pin 13
`cal spring 50 cooperates with appropriate wash-
`prises a yoke 11 pivotally attached by a pin 16
`cal spring 56 cooperates with appropriate wash
`to a bearing box 19 (Fig. 5) formed as an inte-
`ers 5| and a nut on the bolt 49 to provide alon-
`to a bearing box 16 (Fig. 5) formed as an inte
`I ers 5| and a nut on the bolt 49 to provide 9, ion
`gral part of the main shank S6 of the casting
`gitudinally extensible connection as well as a
`gral part of the main shank 66 of the casting
`gitudinally extensible connection as well as a
`pivotal connection between the above mentioned
`65, and a yoke 30 pivotally attached by a pin
`65, and a yoke 66 pivotally attached by a pin
`pivotal connection between the above mentioned
`8|
`to the afore-described ribs 13 of the snow
`35
`parts of the main frame 33. Extending trans-
`parts of the main frame 33. Extending trans
`6| to the afore-described ribs 13 of the snow
`35
`versely of the angle members 45 near the rear
`plow 64, which yokes 11 and 80 are resiliently
`plow 64, which yokes 11 and 66 are resiliently
`versely of the angle members 45 near the rear
`ends thereof is an angle member 52 which is
`connected -together by a through bolt 32 which
`connected together by a through bolt 62 which
`ends thereof is an angle member 52 which is
`extends through each and is provided with a
`braced with respect -to the angle members 45
`extends through each and is provided with a
`braced with respect to the angle members 45
`pair of surrounding helical springs 83 and 84,
`by braces 53. The opposite ends of the angle
`pair of surrounding helical springs 63 and 64,
`by braces 53. The opposite ends of the angle
`the latter of which is interposed between the
`member 52 carry brackets 54, 54 the function
`the latter of which is interposed between the
`member 52 carry brackets 54, 54 the function
`of which is described in complete detail here-
`two yokes 11 and 80, and the former of which
`two yokes 11 and 66, and the former of which
`of which is described in complete detail here
`inafter.
`is interposed between a washer 82' at one end
`is interposed between a washer 62' at one end
`inafter.
`At their forward ends the angle members 45
`of the bolt 82 and the yoke 80.
`It will be evi-
`of the bolt 62 and the yoke 66. It will be evi
`At their forward ends the angle members 45
`carry a rigidly attached transversely extending
`dent that the connecting means 15 is designed
`dent that the connecting means 16 is designed
`carry a rigidly attached transversely extending
`angle member 55 which carries at opposite ends
`45
`to maintain the blade 85 of the snow plow G4
`to maintain the blade 65 of the snow plow 64
`angle member 55 which carries at opposite ends
`45
`at a normal predetermined angle but that the
`upstanding angles 55 (see Fig. 5). As seen by
`upstanding angles 56 (see Fig. 5). As seen by
`at a normal predetermined angle but that the
`reference to Figs. 3 and 4 of the drawings, there
`snow plow is provided for limited resilient piv-
`snow plow is provided for limited resilient piv
`reference to Figs. 3 and 4 of the drawings, there
`extends upwardly from the angles 56 a pair of
`otal movement about the axis of the pivot pins
`otal movement about the axis of the pivot pins
`extends upwardly from the angles 56 a pair of
`12 both in a clockwise and a counter-clockwise
`pivotally attached uprights 51, 51 formed of angle
`pivotally attached uprights 51, 51 formed of angle
`12 both in a clockwise and a counter-clockwise
`members and pivotally attached to said angles
`direction with respect to said normal position.
`direction with respect to said normal position.
`members and pivotally attached to said angles
`This provides for the absorption of shocks re-
`58‘ by pivot pins one of which is seen at 53 -in
`This provides for the absorption of shocks re
`56‘ by pivot pins one of which is seen at 56 in
`Fig. 3 of the drawings.. The tops of the uprights
`ceived by the blade 85 in the operation of the
`Fig. 3 of the drawings.. The tops of the uprights
`ceived by the blade 65 in the operation of the
`51 are rigidly attached by a cross-piece 59 in
`snow plow 64 such as, for example, those re-
`51 are rigidly attached by a cross-piece 59 in
`snow plow 64 such as, for example, those re
`ceived when a stone is struck on the road surface.
`the form of an angle member which is provided
`the form of an angle member which is provided
`ceived when a stone is struck on the road surface.
`To provide for the pivotal adjustment of the
`To provide for the pivotal adjustment of the
`at opposite ends with brackets 60, 60'. Extend-
`at opposite ends with brackets 66, 66'. Extend
`auxiliary frame 53 with ‘respect
`to the main
`ing between the previously described brackets
`auxiliary frame 63 with ‘respect to the main
`ing between the previously described brackets
`54, 54 and the brackets 60, 60 are adjustable
`frame 33 about the axis of the pivot pins 51,
`frame 33 about the axis of the pivot pins 61,
`54, 54 and the brackets 66, 66 are adjustable
`brace rods 6|, 6| provided at each end with ad-
`which is a substantially horizontal axis, with
`which is a substantially horizontal axis, with
`brace rods 6|, 6| provided at each end with ad
`the consequent raising and lowering of the snow
`justing yokes 62, 62 associated with which are
`justing yokes 62, 62 associated with which are
`the consequent raising and lowering of the snow
`appropriate lock nuts 52’.
`appropriate lock nuts 62’.
`plow 64 or blade 85, I provide at each side of
`plow 64 or blade 85, I provide at each side of
`the auxiliary frame 53 a power operated adjust-
`By reference to Fig. 1 of the drawings, it will
`the auxiliary frame 63 a power operated adjust
`By reference to Fig. 1 of the drawings, it will
`be seen that the afore-described main frame 33
`ing mechanism which is preferably in the form
`ing mechanism which is preferably in the form
`be seen that the afore-described main frame 33
`is positioned generally below the tractor 20 with
`of an expansible hydraulic piston motor 86. there
`is positioned generally below the tractor 26 with
`of an expansible hydraulic piston motor 66, there
`being two such motors 36 of similar construc-
`the uprights 51 and cross-piece 59 positioned
`the uprights 51 and cross-piece 59 positioned
`being two such motors 66 of similar construc
`tion. The upper end of each of the cylinders
`in front thereof with the brace rods 6| extend
`tion. The upper end of each of the cylinders
`in front thereof with the brace rods 6| extend-
`ing one on each side of the motor and tractor
`89 of the motors 86 is pivotally attached by a
`69 of the motors 66 is pivotally attached by a
`ing one on each side of the motor and tractor
`frame 2| of the tractor 20. Extending forwardly
`pin 81 to an upright 51 and a spaced vertical
`frame 2| of the tractor 26. Extending forwardly
`pin 61 to an upright 51 and a spaced vertical
`from and pivotally attached to the main frame
`plate 88 rigidly attached to the angle member
`plate 66 rigidly attached to the angle member
`from and pivotally attached to the main frame
`33 is an auxiliary frame 83 to the front end of
`or cross-piece 59, said pin 81 being removably
`or cross-piece 56, said pin 61 being removably
`33 is an auxiliary frame 63 to the front end of
`which is attached a snow plow or scraper blade
`held in place by appropriate cotter keys.
`held in place by appropriate cotter keys.
`which is attached a snow plow or scraper blade
`64. The auxiliary frame 53 is constructed of a
`The piston rod 90 of each motor 86 is provided
`The piston rod 96 of each motor 66 is provided
`64. The auxiliary frame 63 is constructed of a
`with a flange 9!‘ against which abuts a helical
`pair of similar heavy brackets or castings 65 the
`pair of similar heavy brackets or castings 65 the
`with a ?ange 9|‘ against which abuts a helical
`structure of which is best seen by reference to
`spring 92 which rides on a yoke 93, which piston
`spring 92 which rides on a yoke 93, which piston
`structure of which is best seen by reference to
`Fig. 5 of the drawings. Each of said castings
`rod so is provided with a further helical ‘spring
`Fig. 5 of the drawings. Each of said castings
`rod 96 is provided with a further helical spring
`94 cooperating with a large washer 65 carried at
`65 is formed with a main shank 66 which is piv
`65 is formed with a main shank 66 which is piv- 75 94 cooperating with a large washer 95 carried at
`75
`
`40
`40
`
`50
`50
`
`60
`60
`
`65
`65
`
`70
`70
`
`

`
`7
`
`-
`
`5
`5
`
`10
`10
`
`15
`15
`
`20
`20
`
`25
`25
`
`30
`30
`
`40
`40
`
`valve I22. ~
`
`3
`3
`' 2,242,472
`' 2,242,472
`‘the lower end of the piston rod 99 to provide a
`pressure conduit II1 to the control valve I9I. A
`‘the lower end of the piston rod 90 to provide a
`pressure conduit II1 to the control valve IN. A
`resilient connection between said yoke 93 and ‘
`return conduit II8 provides a return path from
`return conduit "8 provides a return path from
`resilient connection between said yoke 93 and '
`said piston rod 99 for movement in reverse direc-
`the control valve ml to the tank 99. Control
`said piston rod 90 for movement in reverse direc
`the control valve IN to the tank 99. Control
`conduits II9 and I29 extend from the control
`tions. That is, the two helical springs 92 and
`tions. That is, the two helical springs 92 and
`conduits H9 and I20 extend from the control
`valve I9I to opposite ends of the cylinders 89
`94 provide for reverse movement of the piston
`94 provide for reverse movement of the piston
`valve [M to opposite ends of the cylinders 89
`of the hydraulic piston motors 86.which are con-
`rod 99 with respect to the yoke 93 resiliently in
`rod 90 with respect to the yoke 93 resiliently in
`of the hydraulic piston motors 66which are con
`reverse directions. By reference to Fig. 5 of the
`nected in parallel. Also extending from .the out-
`reverse directions. By reference to Fig. 5 of the
`nected in parallel. Also extending from .the out
`drawings, it will be seen that the yoke 93 is piv-
`put of the pump I 94 to the tank 99 is a by-pass
`drawings, it will be seen that the yoke 93 is piv
`put of the pump I 04 to the tank 99 is a by-pass
`otally attached by a pin 96 to a bearing box
`conduit I2I controlled by a high pressure relief
`otally attached by a pin 96 to a bearing box
`conduit I2I controlled by a high pressure relief
`91 formed integral with the arm 11 of the cast-
`valve I 22.
`~
`_
`-
`91 formed integral with the arm H of the cast
`ing 65.
`It will thus be evident that the snow
`It may be stated that the afore-described con-
`ing 65. It will thus be evident that the snow
`It may be stated that the afore-described con
`plow 64 is held in any adjusted position by the
`duits II9, .I29'are preferably flexible fabricated
`plow 64 is held in any adjusted position by the
`duits II9, .I20'are preferably ?exible fabricated
`hydraulic piston motors 86, 86 but resilient move-
`rubberhoses capable of standing relatively high
`rubber‘hoses capable of standing relatively high
`hydraulic piston motors 86, 8'6 but resilient move
`ment from the normal position as determined by
`pressures which conduits'may be readily directed
`pressures which conduitsmay be readily directed
`ment from the normal position as determined by
`over tortuous paths to reach the hydraulic» pis-
`said motors 86, 86 is permitted in reverse direc-
`said motors 86, 86 is permitted in reverse direc
`over tortuous paths to reach the hydraulic» pis
`tions due to said springs 92 and 94. The hy-
`ton motors 86, while at the same time providing
`tions due to said springs 92 and 94. The hy
`ton motors 86, while at the same time providing
`for relative adjustment between theportions of
`draulic piston motors 86 are very powerful and
`draulic piston motors 06 are very powerful and
`for relative adjustment between the'portions of
`easily controllable power operated means for ad-
`the main frame 33, particularly between the up-
`easily controllable power operated means for ad
`the main frame 33, particularly between the up
`justing the position of the auxiliary frame 63
`rights 51 and the angle members 45 as provided
`justing the position of the auxiliary frame 63
`rights 51 and the angle members 45 as provided
`with respect tothe main frame 33 about the
`by the brace rods 6|. Appropriate brackets I23
`by the brace rods 6|. Appropriate brackets I23
`with respect toithe main frame 33 about the
`horizontal axis provided by the pivot pins 61,
`are also provided to support the conduits II 9,
`horizontal axis provided by the pivot pins 61,
`are also provided to support the conduits II 9,
`thus providing for the ready adjustment of -the
`thus providing for the ready adjustment of the
`I20 from the tractor frame (Fig. 1).
`I29 from the tractor frame (Fig, 1).
`snow plow 64. As hereinafter described in full
`Before describing the operation of the hy-
`Before describing the operation of the hy
`snow plow 64. As hereinafter described in full
`draulic control system, attention is directed to
`detail, the motors 86 are locked in any position
`detail, the motors 86 are locked in any position
`draulic control system, attention is directed to
`of adjustment to which they are adjusted thus
`Figs. 10, 11 and 12 of the drawings which illus-
`of adjustment to which they are adjusted thus
`Figs. 10, 11 and 12 of the drawings which illus
`preventing either expansion or contraction of
`trate the structure of the control valve I 9|. Said
`preventing either expansion or contraction of
`trate the structure of the control valve I 0|. Said
`control valve comprises .a main base I24 which
`them under the influence of the snow plow 64
`control valve comprises a main base I24 which
`them under the in?uence‘of the snow plow 64
`when in operation.
`‘
`is formed as an integral part of the tank 99 upon
`when in operation.
`is formed as an integral part of the tank 99 upon
`By reference to Figs. 1 and 3 of the drawings,
`which is bolted a main body or casting I25 as
`By reference to Figs. 1 and 3 of the drawings,
`which is bolted a main body or casting I25 as
`it will be seen that I have provided a hydraulic
`by machine bolts I26. Extending longitudinally
`by machine bolts I26. Extending longitudinally
`it will be seen that I have provided a. hydraulic
`through the casting I25 is a cylindrical bore I21
`system 98 to control the hydraulic piston motors
`system 98 to control the hydraulic piston motors
`through the casting I25 is a cylindrical bore I21
`one end of which communicates with a chamber
`86, 86. Said hydraulic system comprises a. hy-
`86, 86. Said hydraulic system comprises a hy
`one end of which communicates with a chamber
`draulic fl