US2574624A

US2574624A - Control valve mechanism

Info

Publication number: US2574624A
Application number: US35119A
Authority: US
Inventors: John D Cochin
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-06-25
Filing date: 1948-06-25
Publication date: 1951-11-13
Anticipated expiration: 1968-11-13

Description

Nov. 13, 1951 J. D. COCHIN CONTROL VALVE MECHANISM 3 Sheets-Sheet 1 Filed June 25, 1948 INVENTOR.

INVENTOR.

Nov. 13, 1951 J. D. COCHIN CONTROL VALVE MECHANISM 3 Sheets-Sheet 2 Filed June 25, 1948 uomv a. coo/1m A'T TOR/YE) Nov. 13, 1951 Filed June 25, 1948 J. D. COCHIN CONTROL VALVE MECHANISM 3 Sheets-Sheet 3 IN V EN TOR.

JOHN D- GOGH/IV Patented Nov. 13, 1951 UNITED STATES PATE OFFICE f 2,574,624 CONTROL. VALVE ME A ISM JohnD. Cochin, San Francisco, Calif. Application June 25, 194s, SerialNo. 35,119

'7 Claims.

This invention relates to an improved valve mechanism for selectively controlling the passage of fluids employed to operate particular-1y dual hydraulic mechanisms, such as dual hydraulic lifts, rams, elevators, jacks, orthe like. The present invention also principally relates to an operating handle means to operate selectively a plurality of independently depressible actuating parts provided on valve mechanisms and on mechanisms. The present invention is generallyrelated to that class of control valves described my copending application Ser. No. 733,329, filed March 8, 1947, and to the valve mechanism described in my United States Reissue Patent No. 19,239; for Valve Lifting Devices, which said valve mechanism are particularly adapted to selectively control the passage of hydraulic liquids or other fluids to actuate hydraulic automobile lifting rams.

Frequently garage and service station operators, in servicing and repairing motor vehicles pref-er to employ two independently operated lifting rams which separately supportthe front and rear end of a vehicle, respectively, during lifting operations, in lieu of the more conventi nels s post t rd vp h d au ic l ng ram. Conventional installations of dual hydraue lic'lifting devices, because they generally include multiple separate and distinct valve mechanisms to operate each post or ram, are costly to install and maintain, and also attendant with their use is the added disadvantage that there is no conveniently located unitary valve control mecha nism by which an operator can actuate both rams simultaneously by a single manualinanipue It is, therefore, a principal object of this invention to provide a single and a centrally located valve e a i m to co t l s ec i ly the. Peer sageand flow of hydraulic fluids between an oil ank e oir an a pair of hyd a ting rams, and to control selectively the passage of air into and out of the oil tank reservoir.

Another object of this invention is to provide operating handle means on a. control, valve for dual rams which has parts capable of individual op ra on. or which sai parts y b o erated ma al s m n ou ly a nita y a d means.

A further object ofthis invention is to provide a valve control mechanism for dual hydraulic ramswhich is compact in size, simple to install, and which incorporates various safety featuresto prevent accidental displacement of he rams.

- Qther'ohiects oetmsmventiomwiilbecomecw 2 parent upon referring to the following specificationa-nd accompanying drawings in'which similar characters of reference represent corresponding parts in each of the several views.

In the drawings:

Fig. 1 is a schematic view showing the valve mechanism in assembled operative relationship with respect to apair of hydraulic automobile lifting rams and anoil tank reservoir.

Fig. 2- is a perspective view of the valve mechanisin.

Fig. 3 is a top plan view of the valve mechanism partly in section.

Fig. 4 is a side elevational view of the valve mechanism.

Fig. 5 is a sectional view taken on line 5P5 of Fig. 4.

Fig. 6 is a sectional view taken on line 6-6 of Fig. 3.

Fig. '7 is a sectional view taken on either line 1a'1a or line 1b1b of Fig. 3.

Fig. 8 is a sectional view taken on line 8-8 of Fig. 3.

Fig. 9 is a perspective view illustrating the bottom portions of the operating handle mechanism.

Referring to Fig. 1 the valve mechanism to be more fully described herein is generally ind-i cated at H and isshown attached to a liquid or oil reservoir tank [2. Valve mechanism H has separate conduit connections 13 and Hi to automobile lifting rams orposts l5 and I6 and has also a liquid conduit connection to the interior of tank I2. '11; will sumce initially for the proper understandingof this invention to relate merely'that when gas under pressure is supplied from a compressor source (not shown) to oil tank I2, the oil therein will be forced upwardly into valve mechanism II which may be opera-ted to dispatch selectively the oil through conduits l3 and H to rams I5 and I6 to elevate either or both of said rams according to commonly understood principles of hydraulics. Conversely upon proper manipulation of valve mechanism l l compressed gas contained in tank I may be exhausted and oil from rams I 5 and I6 allowed to return to tank l2 from said rams through conduits l3 and ['4' to cause the said rams to lower.

As illustrated particularly in Fig 5 the valve mechanism H comprises a valve casing H which is vertically partitioned to form a liquid or oil section A, a liquid or oil section B and a gasor air section C. The liquid or oil sections will hereinafter be referredto as oil sectionsand the gas or air section will hereinafter be referred to as en cu section.

Oil sections A and B are identical in construction, and Fig. 7 illustrates the parts comprising both of the oil sections taken on either lines 1a1a or lines 1b1b of Fig. 3. Each oil sectionA and B comprises a lower chamber I8 in flow communication with a threaded orifice I9 which in turn has an oil conduit connection (not shown) to oil tank I2. Each of the oil sections A and B is alsoprovided with a bottom oil chamber 2| which said chamber in the case of oil section A communicates with orifice 23 which, in the case of oil section B, communicates with orifice 23a. Orifices 23 and 233. each have respec tive oil conduits communicating with hydraulic rams I5 and I6 through pipes or conduits I3 and I4, and each of the oil sections A and B is provided with a pair of valves, 24 and 25, which are arranged to control the flow of oil between bottom oil chamber I8 and connecting chamber 22 and between bottom chamber 2| and connecting chamber 22, respectively.

Valves

24 and 25 comprise

valve heads

26 and 21 through which extend

valve stems

28 and 29, which said valve heads are normally urged to closed position by action of valve springs 3| and 32 which act upwardly upon the under sides of the valve heads.

Air section C is partitioned to form an upper air chamber 33 in fiow communication with air escape port 34, and a bottom air chamber 35 in flow communication with orifice 36 and to which said latter orifice is connected a suitable conduit (not shown) connecting with an air compressor (not shown). Air connecting chamber 31 is in flow communication with orifice 38 and a suitable conduit (not shown) connects with tank l2. A pair of valves, indicated generally at 39 and 4!, having

valve heads

46 and 41 through which extend

valve stems

42 and 43, are normally retained in closed seated position by the upward action of valve springs 44 and 45.

A plurality of identical valve pins 5! are centrally bored at their lower ends to receive the upwardly extended ends of each of the

valvestems

28, 29, 42 and 43 above described, and are slidably mounted in tubular plugs 52 which in turn are threadedly inserted in hollow bosses 49 which extend upwardly from the casing I1 in spaced parallel row formation. The bottom ends of valve stems 28 are disposed slidably in vertical stem guides or wells 38 which extend upwardly from the bottom of casing I1, and suitable springs 55 mounted on pins 5| engage the underside of caps 55 to normally urge the pins upwardly to a posi tion whereby shoulders 54 provided on the lower ends of the pins abut against the inner top surface of easing I1 to limit maximum upward movement of the pins.

I Application of fiuid pressure upon the valve pins sufficient to overcome the action of the valve springs and springs 56 causes the valves within the casing to open, and conversely, when the pressure on the valve-pins is released, the action of the said springs will bias the valves closed and return the pins to their normal upward position.

The preferably manual operated valve control mechanism comprises two independently movable members -or operating levers, generally indicated at 51 and 58. The members or

levers

51 and 58 are sometimes referred-to herein and in the claims as operating handles or as first operating handle and second operating handle. The bottoms of said

members

51 and 58 are each provided with downward depending portions 59--60 and 6|--62, respectively. The-

portions

59, 6|], 6| and 62 are each provided with apertures aligned with one another to receive a common pivotal supporting pin or bolt 64 supported at opposite ends by

arms

65 and 66 which project upwardly from valve casing I1, and the longitudinal axis of bolt 64 represents the pivotal axis about which levers 51 and 58 may be rocked either in the direction of arrows A or B in the drawings.

Operating handle 51 comprises further a vertical shank 61 and a hand grip portion 68 which extends outwardly from, and at substantially right angles to, shank 61, and the lower end of shank 61 terminates in a bowed or arch-shaped bottom portion 18 from which extend a plurality of actuating arms 69, II, 12 and 13. Actuating arms 12 and 13 overlie the valve pins which connect with the

valves

24 and 25 located interiorly of oil section A, above described, and actuating arms 69 and 1| partially overlie the caps and pins which connect with the air valves 39 and 4| provided in air section C.

Operating handle 58 is provided with a fiat base portion 14, and a vertical shank 15 which extends upwardly therefrom to equal in height shank 61 of operating handle 51. A hand grip portion 16 extends outwardly from, and at right angles, to shank 15, and a plurality of actuating

arms

11, 18, 19 and 8| extend outwardly from fiat base portion 14. Actuating arms 18 and 19 overlie the caps and valve pins which connect with the oil valves in oil section B, whereas actuating arms 11 and 8| share an overlying position with actuating arms 1| and 69 over the caps and pins which connect with the valves located in air section C. In the construction of the operating mechanism, above described, it is seen that an operator may operate manually either

operating handle

51 or 58 separately, or the operator may, for example, clasp both the

hand grip portions

68 and 16 and together, with one hand, operate both the levers as a unitary handle. The arch-shaped or bowed portion 18 of lever 51 permits the fiat base portion 14 of lever 58 to be rocked independently back and forth without in any Way interfering with, or engaging any portion of, lever 61.

The operation of the valve mechanism will now be described. For example, in order to elevate ram I6 without elevating ram I5 operating lever 51 is moved manually in the direction of arrow B causing actuating arm 13 to depress the valve pin and stem connected to valve 24 in oil section A, thereby causing said valve 24 to open. Simultaneously, actuating arm 69 will engage and depress the valve pin and stem connected to valve 39 in the air chamber to thereby open the. said air valve to permit air in lower air chamber 35 to fill air connecting chamber 31 and to pass into oil tank I2 through orifice 38. The compressed air in oil tank I2 causes oil from the tank to fiow into the valve mechanism through orifice I9, and from there pass through open valve 24 in valve section A to fill oil connecting chamber 22. The oil under pressure flowing into connecting chamber 22 acts downwardly upon valve head 21 to overcome the action of valve spring 32 to force said valve open and to thereby permit oil under pressure to travel to ram I6 -via orifice 23 and conduit I4 to elevate the said ram I6. Upon the operators. release of his grip upon operating lever 51, valve springs 3| and 34 operate to close the valves, and to thereby cut off the supply of compressed air into tank I2 and to shut off the supply of oil to ram I6; and springs 56 urge upwardly the valve pins engaging actuating arms 69 and 13 to cause operating lever 51 to rock to its vertical neutral position.

- The lower ram I6 operating lever ismoved in. the. direction or arrow A. causing actuating arms 11-. and 12-. to engage anddepressthe respectivevalvepins which connect with valves 25 and M provided respectively inoil sectionA and air section thereby causing these said valves to open. Opening of; air. valve 4|. permits the. compressed air. contained within tank |2 to escape therefrom to the atmosphere via orifice 38, air

pressurefrom-the ram, forces valve 24 open to permit thecontinuous flow of the oil through orifice. I 9. back into oil tank i2. The valve springs and the springs 56 engaging the pins cause the valves to close and operating lever 5'!- to rock to its normal vertical neutral position when an operator releases his grip upon the said lever, as above described.

The, principles of operation of the valve mechanism to. actuateram i5 are identical with the mode of operation of ram I6 above described. Specifically, movement of operating lever 58 causes actuating arms '19 and 8| to open valve 24 in oil section B and valve 39 in air section C thereby permitting compressed air to enter tank 12 and to force oil through valve section B and conduit 13 connected to orifice 235. into ram l5 to elevate said ram.. Conversely, when operating lever 58 is moved in the direction of arrow A, actuating arms Tiand 18 open valve in oil section B and valve 4.! in air section C to permit the escape. of air from oil tank C and to allow the oil from ram IE to. return to tank l2 in the manner as. above described with respect to the operation of operating lever 57. Theoil and air valve movements which take place in oil section B and air section C during raising and lowering operations of ram. 45, are identical to the oil and air valve movements in oil sections A and C described above with respect to the raising and lowering of ram it.

t is apparent from the foregoing discussion thatv by proper manipulation ofoperating levers 51 and 58 the rams I5 and I6 may be selectively raised-0r lowered. It is also obvious that an operator may actuate both the rams l5 and I6 simultaneously by manipulating

levers

51 and 58 as a unitary handle in the manner hereinabove sug ested. Although I. have described the operation and construction of the operating mechanism with respect to itsuse and function on a valve mechanism which is, adapted to control and regulate the flow of hydraulic fluids to dual hydraulic rams, it, is obvious that my herein described cla min term I valve is intended to include, and does include, other mechanisms than valves utilized for the now control of fluids, as for example, electric pushebutton type switches as above set forth.

Although I have described my invention in some detail for purposes of clarity of description and by way of illustration and example, it is understood that certain changes and modificationsmay be made without departing from the spirit of the invention and the scope of the appended claims.

I claim:

1. In an operating handle means for actuating selectively a plurality of independently depressible actuating parts projecting exteriorly of a valve, a first handle rockably mounted on a pivotal support located exteriorly of said valve, actuating arms extending laterally from opposite sides of said first handle, each of said armssuperposed over a depressible actuating par-t and arranged to depress said part when said handle is rocked in a direction toward said part, a second operating handle rockably mounted on said pivotal support and having actuating arms ex tending laterally from opposite sides thereof, each of said arms on said second handle super-- posed over a depressible actuating part and arranged to depress said part when said handle is rocked in a direction toward said part, one of said actuating arms on said first handle and one of said actuating arms on said second handle arranged andpositioned to share with each other an overlying position with respect to one of the said depressible actuating parts whereby said last named actuating part can be actuated by rocking independently the first or second handles and by rocking both said first and second handles simultaneously in a direction toward said last named actuating part, and means carried by each of said handles to facilitate gripping of said handles to move the same selectively independently and simultaneously.

2. In an operating handle means for actuating selectively a plurality of independently depressible valve actuating parts projecting exteriorly of a valve, a first handle rockably mounted on a pivotal support located exteriorly of said valve, ac tuating arms extending laterally from opposite sides of said first handle, each of said arms superposed over a depressible actuating part and arranged to depress said part when said handle is rocked in a direction toward said part, a second operating handle rockably mounted on said pivotal support and having actuating arms extend.- ing laterally from opposite sides thereof, each of said arms on said second handle superposed over a depressible actuating part and arranged to depress said part when saidhandle is rocked in a direction toward said part, one of said actuating arms on said first handle, and one of said actuating arms on said second handle both arranged and positioned to share with each other an over lying position with respect to one of the said depressible actuating parts whereby said last named actuating part can be actuated by either rocking independently the said first or second l andlcs, or by rocking both said first and second handles simultaneously, in a direction toward said last named actuating part, said first and second operating handles operable independently of one another, said first and second handles having vertical stems substantially equal in height to one another and disposed adjacent one another, corresponding individual hand gripping sqrticns provide ,ediace i the we end. of east 7 said stem, said hand gripping portions arranged and constructed to coact mutually to form a unitary hand gripping means for operating manually said first and second handles as a unit.

3. In an operating handle means for actuating selectively a plurality of individually depressible valve actuating parts extending exteriorly of a valve casing the combination comprising a pivot pin attached exteriorly of said casing, first and second independently rockable handles mounted adjacent one another on said pivot pin, first, second and third pairs of valve actuating parts extending exteriorly of said casing, the valve actuating parts of each said pair disposed on opposite sides of said pivot pin, said first handle provided with arms overlying said first pair of said valve actuating parts and arms partly overlying said second pair of valve actuatingparts, said second handle having arms overlying said third pair of valve actuating parts and arms partly overlying said second pair of valve actuating parts, all of said arms on said first and second handles arranged to engage and depress the said respective valve actuating parts which said arms overlie when said first and second handles are rocked in the direction of said parts, individual handle operating means provided on said first and second handles for rocking independently said handles, said individual handle operating means on said first and second handles arranged and constructed to form a unitary handle operating means to rock both said first and second handles as a single handle unit.

, 4. In an operating handle means for actuating selectively a plurality of individually depressible valve actuating parts extending exteriorly of a valve casing the combination comprising a pivot pin attached exteriorly of said casing, first and second independently rockable handles mounted adjacent one another on said pivot pin, first, second and third pairs of valve actuating parts extending exteriorly of said casing, the valve actuating parts of each said pair disposed on opposite sides of said pivot pin, said first handle provided with arms overlying said first pair of said valve actuating parts and arms partly overlying said second pair of valve actuating parts, said second handle provided with arms overlying said third pair of valve actuating parts and arms partly overlying said second pair of valve actuating parts, all of said arms on said first and second handles arranged to engage and depress the said respective valve actuating parts which said arms overlie when said first and second handles are rocked in the direction of said respective parts, and individual hand gripping means provided on said first and second handles for rocking manually independently said handles, said individual hand gripping means on said first and second handles arranged and constructed to form a unitary hand gripping means for manually operating both said first and second handles simultaneously as a single handle unit.

5. In a valve mechanism for selectively controlling'the hydraulic fiow of liquid back and forth between a tank and two hydraulically operated mechanisms and for controlling the flow of compressed gas into and out of said tank, the combination comprising a valve casing partitioned to form first and second liquid chambers and an air chamber, said first liquid chamber having a pair of normally closed valves therein tocontrol the passa e of liquid between a tank and a first hydraulic mechanism, said second chamber having a pair of normally closed valves therein to control the passage of liquid between said tank and a second hydraulic mechanism, said air chamber having normally closed valves therein to control the passage of air into and out of said tank, each of said valves in said first and second liquid chambers and said air chamber provided with valve actuating portions extending exteriorly of said casing, a first means located exteriorly of said valve casing to actuate simultaneously a valve actuating portion connected to a valve in said first liquid chamber and a valve actuating portion connected to a valve in said air chamber, and a second means independently operable with respect to said first means to actuate simultaneously a valve actuating portion connected to a valve in said second liquid chamber and a valve actuating portion connected to a valve in said air chamber, said first and second means arranged and constructed to form a unitary manual operating means to actuate simultaneously valve actuating portions connected to valves located in said first and second liquid chambers and said air chamber.

6. In a valve mechanism for selectively controlling the hydraulic fiow of liquid back and forth between a tank and two hydraulically operated mechanisms and for controlling the fiow of compressed gas into and-out of said tank, the combination comprising a valve casing partitioned to form first and second liquid chambers and an air chamber, said first liquid chamber having a pair of normally closed valves therein to control the passage of liquid between a tank and a first hydraulic mechanism, said second chamber having a pair of normally closed valves therein to control the passage of liquid between said tank and a second hydraulic mechanism, said air chamber having normally closed valves therein to control the passage of air into and out of said tank, each of said valves in said first and second liquid chambers and said air chamber provided with valve actuating portions extending exteriorly of said casing, a first operating handle having parts overlying and engageable with said valve actuating portions connected to the valves in said first liquid chamber and valve actuating portions connected to said valves in said air chamber, a second operating handle independently operable with respect to said first operating handle having parts overying and engageable with said valve actuating portions connected to said valves in said second liquid chamber and valve actuating portions connected to said valves in said air chamber, said first and second handles arranged and constructed to form a unitary manual operating handle means for actuating simultaneously valve actuating portions connected to valves in said first and second liquid chambers and said air chamber.

7. In an operating mechanism for actuating selectively a plurality of individually depressible valve actuating parts projecting exteriorly of a valve, first and second individually rockable members mounted on a pivotal support disposed exteriorly of said valve, first and second individually depressible valve actuating parts located respectively on opposite sides of said pivotal support, a first pair of actuating arms projecting laterally outwardly from opposite sides of said first rockable member, one of said actuating arms of said first pair overlying partially said first actuating part and the other of saidactuating arms of said first pair overlying partially said second actuating part, each of sald'actuating arms of said first pair arranged to depress the valve actuating part 7 5 which it respectively overlies when said first rockable member is rocked toward said part, a second pair of actuating arms projecting laterally outwardly from said second rockable member, one of said actuating arms of said second pair overlying partially said first actuating part and the other of said actuating arms of said second pair overlying partially said second actuating part, each of said actuating arms of said second pair arranged to depress the valve actuating part which it respectively overlies when said rockable member is rocked toward said part, said first and second rockable members arranged with respect to one another and said depressible actuating parts whereby either of said rockable members may be operated to depress either of said actuating parts toward which said member is rocked without imparting movement to the other of said rockable members, and means comprising handle means provided on both said first and second REFERENCES CITED The following references are of record in the 'file' of this patent:

UNITED STATES PATENTS Number Name Date 746,896 Stott Dec. 15, 1903 1,353,977 Stone Sept. 28, 1920 1,632,417 Roebel June14, 1927 1,764,005 Cochin June 17, 1930 1,843,425 Karsten Feb. 2, 1932 2,231,858 Domina Feb. 11, 1941 2,286,432 Monsarrat June 16, 1942 2,462,544 Parker Feb. 22, 1949