US3185237A - Hydraulic rams - Google Patents

Hydraulic rams Download PDF

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Publication number
US3185237A
US3185237A US157429A US15742961A US3185237A US 3185237 A US3185237 A US 3185237A US 157429 A US157429 A US 157429A US 15742961 A US15742961 A US 15742961A US 3185237 A US3185237 A US 3185237A
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United States
Prior art keywords
piston
ram
hydraulic
vehicle
valve
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Expired - Lifetime
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US157429A
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English (en)
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Butterworth Archibald James
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Individual
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Individual
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Publication of US3185237A publication Critical patent/US3185237A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
    • B60S9/14—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for both lifting and manoeuvring
    • B60S9/205—Power driven manoeuvring fittings, e.g. reciprocably driven steppers or rotatably driven cams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
    • B60S9/14—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for both lifting and manoeuvring
    • B60S9/205—Power driven manoeuvring fittings, e.g. reciprocably driven steppers or rotatably driven cams
    • B60S9/21—Power driven manoeuvring fittings, e.g. reciprocably driven steppers or rotatably driven cams comprising a rotatably driven auxiliary wheel or endless track, e.g. driven by ground wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type

Definitions

  • a hydraulic ram is employed on a motor vehicle to lower rollers into engagement with the ground to raise the vehicle wheels at one end of the vehicle from the ground which rollers engage the raised wheels and may be driven by them and the rollers are arranged to roll along the ground in such a direction as to swing the end of the vehicle sideways.
  • the rams are supplied with hydraulic fiuid through a control valve from a pump driven by the vehicle engine and it is advantageous to lower the rollers into engagement with the ground as quickly as possible.
  • a hydraulic transfer for connection between a source of fluid pressure and a hydraulic ram which transfer comprises a compound piston and cylinder, the smaller area piston and cylinder being arranged to communicate with an inlet for connection with the source of fluid pressure and the larger area piston and cylinder being arranged to communicate with an outlet for connection with the ram and valve means operated by the movement of the compound piston at one end of the stroke arranged to place the inlet and outlets in direct communication with one another, and cut off the communication between the larger area piston and the outlet.
  • the movement of the compound piston under t e ac tion of the hydraulic pressure may be against the action of a spring and said valve means may be arranged to produce sufficient back pressure that when the inlet and outlet are in direct communication the hydraulic pres sure on the smaller piston is sutficient to counter the force of the spring.
  • the two sides of the smaller part of the piston may be by-passed by a passage which at one end communicates through valve parts with said outlet and the other end communicates through a non return valve with said inlet.
  • the by-pass passage may comprise a pipe which extends in a fluid tight manner through a wall of the smaller area piston and is connected at one end to said outlet and is provided with valve parts which are partly covered by said wall at one limit of movement of the com-. pound piston and which pipe at the other end is pro-- vided with said non return valve one side of which is in permanent communication with said inlet.
  • a hydraulic transformer as set out above a motor driven pump connected through valve means with a reservoir and with the inlet of the transformer and a hydraulic ram connected with the outlet of the transformer.
  • the valve means may be under joint control of a manipulating member, means controlling the speed of ratus embodying the combination as set out above two hydraulic rams are connetcted to the outlet of the hydraulic transformer and each in extending brings a roller into engagement with the road and raises an adjacent vehicle wheel from the road and at the same time engages that vehicle wheel whereby the roller may be driven by said wheel and rolls along the road in such a direction as to swing the end of the vehicle sideways.
  • the ram assemblage at its upper end may be articulately connected to a spring part of the vehicle whereas the lower end on which the roller is mounted is connected by a link to an upsprung part of the vehicle so that extension of the ram results in the roller being swung downwardly and sideways.
  • FIGURE 1 is a view of a part of the back axle of a vehicle looking from the front thereof and showing diagrammatically the hydraulic transformer, the associated gram-p, control valve and one hydraulic ram in the extended condition and the roller for engagement with the ground and with the vehicle wheel, on one side only of the vehicle, the other side of course being the mirror image of the illustrated side;
  • FIGURE 2 is a similar view to FIGURE 1 and showing the ram in its contracted condition and omitting the transformer;
  • FIGURE 3 is a section through the hydraulic transformer
  • FIGURE 4 is an outside view of the transformer
  • FIGURE 5 is a view looking from the left of FIGURE 4 and FIGURE 6 is a side view of an arrangement for interlinking the control valve for the rams with the throttle valve for the vehicle engine.
  • a rarnl is surrounded by a protective bellows 2 or cover which may. be of synthetic rubber and which may also enclose or incorporate a tension spring 3.
  • the lower element 4 of the ram 1 is rigidly attached to a roller mounting 5 which may be a high duty iron casting.
  • the mounting 5 carries a roller 6 in bearings not shown in this view.
  • a horizontal fore and aft extending pivot pin 15 passing through a part of the mounting 5 secures it to the lower end of a link 7.
  • the upper end of this link is similarly pivoted at 11 on a stationary portion of rear wheel mounting 8.
  • The-vehicle shown has independent suspension by mean of a lower wish bone 9 and transverse leaf spring 10 in a known manner.
  • the upper link pivot 11 has been formed as an extension of the wish bone pivot for convenience, but this pivot 11 may be located elsewhere if preferred.
  • a hydraulic pipe 12 is connected between the ram 1 and the outlet 22 of a hydraulic transformer 16, 19 (described later) and another pipe 168 connects the inlet 25 of the hydraulic transformer through a valve indicated generally at 166 either to the outlet of a pump-165 driven from the engine of the vehicle or to a fluid storage vessel 169.
  • the valve is arranged to be under the joint, control of a manipulating shaft 167, the pressure of the fluid I, within the valve casingand an electrical device 17% conthe motor which drive the pump and of the hydraulic pressure generated by the pump as set out in US.
  • spring means in place of or in addition to said spring 3 may be used to withdraw the roller 6 from its operating position and bring the equipment to the fully retracted position shown in FIG- URE 2.
  • a double-acting ram system may be used so that retraction as well as extension is performed hydraulically.
  • FIGURE 3 a tubular cylinder 16 is retained between end-plates 17 and 18, a tube 19 being permanently attached to the latter.
  • the end plate 17 is provided with an air vent 17a.
  • Tube 19 has formed at its end a disc 20 which carries a tube 21 ending in a suitable screwed union 22, to which is attached the feed pipe 12 which is connected to the ram 1.
  • the end-plate 17 has similarly a feed union 23 centrally disposed and admitting oil under pressure from the pump 165 through a control valve 166 (such as is described in US. patent application Ser. No. 801,254) to the inside of stationary tubular piston rod 24.
  • Piston rod 24 carries at its right-hand end as viewed in FIG.
  • sealing rings 25; and its lefthand end (as viewed in FIGURE 3) is rigidly secured to plate 17.
  • Sliding on the outside of piston rod 24 is a compound piston 26.- The outer and larger area portion of this component carries sealing rings 27, and the inner and smaller area portion 28 is open to the inside of the tubular piston rod 24.
  • This smaller piston face 28 is pierced by a close-fitting hole 28a, which'inay have labyrinth grooves (not shown), and through which passes the tube 21.
  • the left hand end of the tube 21 carries a valve 29, and this is held tightly to the end of tube 21 by valve spring 29a. At the right this operation will involve a delay of several seconds.
  • an accelerator or hydraulic transformer which in essence comprises a small piston subjected directly to the hydraulic pressure generated by a pump and the resulting movement of which is transmitted to a larger piston and so rapidly displaces a quantity of hydraulic hand end of the tube 21 are ports 30 and 31.
  • the large piston face 33 then displaces the oil inside tube 16 and through the ports 31, 30 and the piping 12 connecting union 22 to each ram 1 and causes the first stage of these rams to be operated. Owing to the difference in areas between piston faces 28 and 33, and the fact that the ram retraction spring 32 must be stressed to operate the ram, a relatively high pressure will be developed at piston face 28. By suitable proportioning of piston faces 28 and 33 it can be arranged that this pressure is sufficient to hold out the control valve 166 in the operating position as described in US. patent application Ser. No. 801,254 and this high pressure will at the same time cause the compound piston to be driven rapidly to the right, as viewed in FIG. 3, with consequent rapid expansion of the first stage of the rams.
  • FIGURES 4 and 5 show external views of the accelerator unit, wherein draw-bolts 37 and nuts 38 form a convenient method of holding the assembly together. This transformer unit may be inserted at any convenient point in the oil feed line between the control valve and the rams.
  • FIG- URE 6 Such an arrangement is shown diagrammatically in FIG- URE 6 wherein a carburetor 149 is mounted on an engine manifold 151, and has a throttle spindle 150.
  • This throttle is normally operated by means of rod 152, and lever 153, shown on the remote side of the carburetor.
  • the throttle spindle protrudes through the carburetor body on the nearside, as drawn, and carries a throttle stop piece 154, one arm 154a of which carries the normal slow running control screw 155.
  • a support 156 fixed to the carburetor is formed with a circular hole 156a, wherein fits the enlarged end of rod 157.
  • This end portion of rod 157 comprises a ramp 158, which is in contact with the end of the screw 155, or it may be in contact with a non-adjustable portion of the throttle mechanism.
  • Another arm 154b of throttle stop piece 154 lies adjacent to a slot 163 in the support for rod 157, and in this slot a pin 159 lies and is secured to the end 160 of the rod 157.
  • the other end of rod 157 is connected by a pin joint 161 to an extension 171 of the manipulating shaft 167.
  • a vehicle parking apparatus comprising two telescopic hydraulic rams disposed on opposite sides of the vehicle adjacent two of the vehicle road wheels, a hydraulic transformer supplying fluid pressure to both of said rams, a ground-engaging roller on a movable part of each of said rams, said hydraulic transformer being arranged between a source of fluid pressure and cylinder means of said rams and comprising a cylinder assembly and a compound piston having a small area part and a large area part reciprocable in said cylinder assembly, means for connecting the cylinder assembly at one end to the source of fluid under pressure so that one side of the small area part may be subjected directly to said fluid pressure, means for connecting the other end of said cylinder assembly to the telescopic rams so that movement of the compound piston toward said other end of the cylinder assembly causes the large area part of the piston to displace fluid from the cylinder assembly into the rams thereby rapidly extending them and bringing the rollers into engagement with the ground and with said wheels and continued extension of the rams lifts the wheels from the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Road Paving Machines (AREA)
  • Vehicle Body Suspensions (AREA)
  • Braking Arrangements (AREA)
  • Gear-Shifting Mechanisms (AREA)
US157429A 1960-12-07 1961-12-06 Hydraulic rams Expired - Lifetime US3185237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB42051/60A GB1003691A (en) 1960-12-07 1960-12-07 Improvements in or relating to hydraulic rams

Publications (1)

Publication Number Publication Date
US3185237A true US3185237A (en) 1965-05-25

Family

ID=10422610

Family Applications (3)

Application Number Title Priority Date Filing Date
US157429A Expired - Lifetime US3185237A (en) 1960-12-07 1961-12-06 Hydraulic rams
US157428A Expired - Lifetime US3186308A (en) 1960-12-07 1961-12-06 Hydraulic rams
US157430A Expired - Lifetime US3202231A (en) 1960-12-07 1961-12-06 Parking apparatus for motor vehicles

Family Applications After (2)

Application Number Title Priority Date Filing Date
US157428A Expired - Lifetime US3186308A (en) 1960-12-07 1961-12-06 Hydraulic rams
US157430A Expired - Lifetime US3202231A (en) 1960-12-07 1961-12-06 Parking apparatus for motor vehicles

Country Status (5)

Country Link
US (3) US3185237A (fr)
BE (1) BE611240A (fr)
CH (1) CH414985A (fr)
DE (2) DE1296013B (fr)
GB (1) GB1003691A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369854A (en) * 1975-10-02 1983-01-25 Butterworth Archibald J Parking devices for vehicles
US5884720A (en) * 1996-02-26 1999-03-23 Jacob Ackerman Parking device for vehicles
CN113292004A (zh) * 2021-06-30 2021-08-24 常熟通润汽车零部件股份有限公司 一种易加工且自适应的千斤顶

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298664A (en) * 1964-08-27 1967-01-17 Duff Norton Co Shielded jack
GB1123721A (en) * 1964-08-27 1968-08-14 Sidler Ltd Improvements relating to parking apparatus for motor road vehicles
US3420148A (en) * 1965-03-12 1969-01-07 Richard E Doerfer Holding device
US3589461A (en) * 1967-09-15 1971-06-29 Sidler Ltd Parking devices for motor road vehicles
US4211149A (en) * 1977-10-13 1980-07-08 Pneumo Corporation Split lock ring for locking actuator and method for manufacturing the same
US4392556A (en) * 1978-08-25 1983-07-12 Arkwin Industries, Inc. Actuator locking device
FR2479357A1 (fr) * 1980-04-01 1981-10-02 Baker Cac Dispositif de commande actionne par fluide
FR2637025B1 (fr) * 1988-09-28 1990-12-28 Toutenkamion Procede pour retracter un verin, et verin correspondant
USD329626S (en) 1990-07-16 1992-09-22 The Goodyear Tire & Rubber Company Pneumatic tire tread and buttress
GB2317596B (en) * 1996-09-26 2001-01-31 Bradley Doublelock Ltd Retractable arrangement
GB2335004B (en) * 1998-03-05 2002-02-27 Mbm Technology Ltd Telescopic piston
CN106828439B (zh) * 2017-02-17 2019-06-25 济南匠夫万自动化科技有限公司 一种备用驱动系统及车辆
US11441514B2 (en) 2018-10-02 2022-09-13 Woodward, Inc. Tertiary lock
US10865738B2 (en) * 2019-02-27 2020-12-15 Woodward, Inc. Traveling finger lock for an actuator
CN110203852B (zh) * 2019-05-24 2021-02-19 广西正茂路桥建设有限公司 一种道路施工大直径水泥管段搬运装置
CN112092930B (zh) * 2020-09-07 2021-11-23 湖南福格森装备科技有限公司 一种履带运输机的辅助行驶装置
CN112850552B (zh) * 2020-12-31 2023-09-19 杭州海康机器人股份有限公司 一种搬运装置及货物搬运方法
CN112960584A (zh) * 2021-02-02 2021-06-15 长江三峡通航管理局 一种自驱动螺旋升降装置及升船机安全机构拆装方法
US11788490B1 (en) 2022-12-05 2023-10-17 Woodward, Inc. Traveling finger lock for an actuator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345165A (en) * 1942-04-13 1944-03-28 Bendix Aviat Corp Fluid pressure cylinder
US2375750A (en) * 1942-01-19 1945-05-15 John Eley Jr Hydraulic brake system for motor vehicles
US2399270A (en) * 1943-10-18 1946-04-30 Timken Axle Co Detroit Hydraulic brake system
GB852124A (en) * 1958-03-24 1960-10-26 Archibald James Butterworth Improvements in or relating to control devices for hydraulically actuated jacking orparking mechanisms

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1842776A (en) * 1930-03-15 1932-01-26 Sikorsky Aviat Corp Fluid strut
US1884932A (en) * 1931-04-30 1932-10-25 Walker Brooks Vehicle lifting and traversing device
US1928946A (en) * 1931-12-28 1933-10-03 John H Moffat Means for parking self-propelled vehicles
DE585388C (de) * 1932-01-22 1933-10-06 Versuchsanstalt Fuer Luftfahrt Flugzeugstrebe mit verstellbarer Laenge
US2690712A (en) * 1951-02-19 1954-10-05 Stratton Equipment Company Automatic throttle control
US2964118A (en) * 1955-04-19 1960-12-13 Sidler Ltd Parking devices for motor vehicles
DE963750C (de) * 1955-06-22 1957-05-09 Demag Ag Hydraulischer Zylinder mit teleskopartig ineinanderschiebbaren Kolben
US3073408A (en) * 1959-03-25 1963-01-15 Winkler Kurt Shifting device for the swiveling of cars
US3120398A (en) * 1959-12-03 1964-02-04 Sidler Ltd Device for moving semi-trailers sidewise

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2375750A (en) * 1942-01-19 1945-05-15 John Eley Jr Hydraulic brake system for motor vehicles
US2345165A (en) * 1942-04-13 1944-03-28 Bendix Aviat Corp Fluid pressure cylinder
US2399270A (en) * 1943-10-18 1946-04-30 Timken Axle Co Detroit Hydraulic brake system
GB852124A (en) * 1958-03-24 1960-10-26 Archibald James Butterworth Improvements in or relating to control devices for hydraulically actuated jacking orparking mechanisms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369854A (en) * 1975-10-02 1983-01-25 Butterworth Archibald J Parking devices for vehicles
US5884720A (en) * 1996-02-26 1999-03-23 Jacob Ackerman Parking device for vehicles
CN113292004A (zh) * 2021-06-30 2021-08-24 常熟通润汽车零部件股份有限公司 一种易加工且自适应的千斤顶

Also Published As

Publication number Publication date
GB1003691A (en) 1965-09-08
US3202231A (en) 1965-08-24
US3186308A (en) 1965-06-01
BE611240A (fr) 1962-03-30
DE1296013B (de) 1969-05-22
DE1292524B (de) 1969-04-10
CH414985A (fr) 1966-06-15

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