Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2998828 A
Publication typeGrant
Publication dateSep 5, 1961
Filing dateSep 8, 1958
Priority dateSep 8, 1958
Publication numberUS 2998828 A, US 2998828A, US-A-2998828, US2998828 A, US2998828A
InventorsHare Richard C
Original AssigneeDynex Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Slide plate type volume control valve
US 2998828 A
Abstract  available in
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Sept. 5, 1961 R. c. HARE sLTOE PLATE TYPE VOLUME CONTROL VALVE 2 Sheets-Sheet l Filed Sept. 8, 1958 FIG.2.

INVENTOR. RIUHAHD C HABE Sept. 5, 1961 R. c. HARE SLIDE PLATE TYPE VOLUME CONTROL VALVE Filed Sept. 8, 1958 2 Sheets-Sheet 2 l w "l: 39 33373540 /Z T-/ 39 38 37 36 INVENTOR.

RICHARD l1 HABE BY 5% 1 77.%

United States Patent 2,998,825 SLIDE. PLATE TYPE VOLUNIE .y `CONTRGL VALVE Richard C.' Hare, Wauwatosa,V Wis.,k assignor fo' Dynex, Inc., Pewaukee,. Wis., av corporation loit' Wisconsin- Filed, Sept. 8,.195.8,.Ser; No. 759,477. 1 Claim. (Cl. 137,62f5;2'5)

This invention relates generally tol hydraulic mechanisms and'in particular to pressure iluid. control valves, of the. slide plate type -for controlling the. volume. of pressure, fluid ilow which is being delivered: to a. source of utilization from several sources of pressure fluidV supply.

It. is object of the present invention to provide a volumev control valve for selectively directing .the owof pressure fluid which is being delivered` from sever-al sources lto a common loadv or source of utilization. The inventionifurtherfcontemplates theuse of: such a valve with a multi-piston pump having separate discharge conduits.

'Iheinlvention provides a valve of the above type which is economical to manufacture and ethcient in performing its intended functions.

'llhese and other objects and advantages will appear later as disclosure progresses, reference being had to the accompanying drawings, in which;

FIGURE 1 is a side view of a valve made in accordance with the present invention;

U FIGIURE Z is a plan view of the valve shown in FIG- FIGURE 3 is a perspective view in the valve shown in FIGURE l;

FIGURE 4 is an axial sectional view of a hydraulic pump with Iwhich the present invention nds particular utility; and

FIGURE 5 is a schematic view of the pump shown in FIGURE 4 Iwhen used with the valve of the present invention.

Referring in greater detail to the drawings, the valve 9 made in accordance with the present invention is of the slide plate type and includes three plate members 10, 11 and 12 which are suitably finished and secured together by any suitable means, such as cap bolts (not shown) to thereby form a valve body. The central plate member 11 has a large rectangular opening 14 formed in its central portion which defines a valve chamber in this valve body. End plate contains the cylinder port C, tank port T and pressure port P2. End plate 12 contains the pressure ponts P1 and P3. As best shown in FIGURE l, all of these ports are in communication with the valve chamber and terminate therein in spaced apart axial alignment. The tank port is located at one side of the pressure inlet ports and the lload port C is located at the opposite side of the inlet ports.

A slide plate [i6 is reciprocable in the chamber and is hnished to provide a slidable sealing tit therein. The plate 16 is secured to a control rod 17 through which of the slide plate used i-t is shifted by any suitable means (not shown). Plate 16 has two elongated and aligned ports or slots 20 and 211 extending therethrough which are selectively registerable with the porting in the plate members 10 'and 12, as will appear more fully hereinafter.

In FIGURE '4 there is shown a hydraulic pump 22 with which the present invention finds particular utility. Such a pump is fully described in the co-pending U.S. application of David T. Blair, Serial No. `661334, led

May 24, 1957, now Patent No. 2,941,475, issued June 21, 1960, entitled Hydraulic Pump, :and assigned to the assignee of the present application. It is thought sucient to say, tor purposes of this disclosure, that the' pump has a plurality of pumpingchambers 24 in which the pistons 25 are reciprocated by the rotatable wobble plate 26 Ato etfect suction strokes when Ithe pistons are moved to the lett (as viewed in FIG, 4) and pumping strokes when they'larefrcedto the right.` In4 the illustration chosen 'for'purposes of; this? disclosure, the' pump has siirr pumping chambers which; are adapted to bein communication, viafoutlet'check'valves 27' and cross bores 28; witha common dischargey outlet 29. Alternatively; the dischargetrom each"` ofthe pumping chambersy may be made to pass independently-@trom the pump viaanisolating valve assembly 30; `instead of to the common port 29v as when the regular valve plug assemblyA 31'v is used:

When fourv of theseisolating' valvesv 30 are` used; as best shown in FIGURE 5; the discharge from theremaining two'- chambers is discliargedi through' .the conduit 32 that is connectedA to 'the-common discharge port 29; The isolating valves are paired upto the conduits 33 and 34? so as to give three separate ows of' pressure fluid;

In certaiulfliydraulic circuits itl may be desirable to selectively direct. pant or' all of." the pump ldischargeI to-'a common source of utilization. In other words, it may be desirable to Jdirect the discharge 'from some of the chambers to the work and the discharge from the remaining chambers to the tank, or elsewhere.

The volume control valve 9 provided by the present invention permits a iixed displacement pump of the above type to furnish pressure ii-uid as does a variable volume pump. 'Iihe pressure fluid is furnished in steps or graduations, `that is, in the example shown, in multiples ot two pumping chambers.

As the invention has been shown, the three separate lines of fluid pressure 32, 33 andV 34 are in communication with the pressure ponts P2, P1 and P3, respectively, of the valve. Figure 5 showsV the slide .plate 16 posiitoned to direct the discharge of all three conduits 32, 33 and 34 to the load via slot 21 and conduit C. In this position the conduit T leading to the tank or elsewhere is blocked, and the entire pump output is used to penform work.

By progressively moving the plate 16 to the left, the conduits 33, 32 and 34 may in that order be made to discharge via slot 20 into the conduit T rather than into the conduitC. When the plate is moved to the extreme left position, all of the ow will be dumped to the tank via slot 20 and conduit T, and the conduit C will be blocked.

Detents 36 to G9 are formed in the plates 10 and 12 and the spring loaded balls 40 in the aperture 41 of the slide plate selectively engaged these detents when, respectively, the plate is positioned to deliver all the iluid, fluid from conduits 32 and 34, fluid from only conduit 34, and none off the iluid, to the conduit C. Thus the plate is positively located in any one of its flow directing steps.

By having two separate porting slots 20 and 2x1, as shown, the pump flow may be `directed entirely or partially to either the load or the tank; or a portion of the entire ilow may simultaneously be directed to both the work and tank. y

While .the illustration chosen for purposes ot this disclos-ure shows a six-cylinder pump'with suitable conduits tol provide three discharge pressure lines communicating with a valve having three pressure inlets, a pump having any number of separate pumpingchambers Vmay be utilized and the ilow therefrom divided into vari-ous numbers of conduitsfor communication with a valve having result in an ecient valve having minimum leakage probf lems. p

Various modes of carrying out the invention are contemplated as being the scope of the following claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.

Iclaim: -f Y `A hydraulic iluid volume control valve comprising,Y a central plate having a,rectang1.1la:t opening therethrough, a side plate sealingly secured to each of opposite sides of said central plate to thereby deline a valve body having a chamber therein, a series of uid pressure inlet ports extending through said body and communicating with said chamber in -alignment with one another, a load port extending through said body from said chamber at one side of said inlet ports, a tank port extending through said body from said chamber at the other side of said inlet ports, and a slide plate sealingly reciprocable within said chamber and having a pair of elongated porting slots therethrough which are in alignment with one another in respect to the direction of slide platereciprocation, the arrangement being suoh that when said slide plate is at one limit of its travel one of said slots registers with all of said inlet ports and with said load port, and when said slide plate is at the other limit of its travel the other of said slots places said tank port in registration with all of said inlet ports.

References Cited in the tile of this patent UNITED STATES PATENTS 975,240 Hicks NOV. 8, 1910 2,074,618 Roeder Mar. 23, 1937 2,247,261 Towler et al June 24, 1941 2,252,141 Seidel et al Aug. l2, 1941 2,536,486 Berry Ian. 2, 1951 `I2,568,356 Moulden Sept. 18, 1951 2,617,257 Douglas Nov. A11, 1952 2,696,788 Funston Dec.` 14, 1954 2,797,706 Harrison July 2, 1957 2,858,851 HollV Nov. 4,11958 2,951,505 Hare Sept, 6,1960 2,964,058 Fuente Dec. 13, 1960 FOREIGN PATENTS 966,043 France Mar. 1, 1950

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US975240 *Jul 9, 1910Nov 8, 1910P H & F M Roots CompanyValve for blowers.
US2074618 *Aug 1, 1934Mar 23, 1937Roeder Clyde APumping system
US2247261 *May 23, 1940Jun 24, 1941Towler Frank HathornUnloading valve for reciprocating ram pumps
US2252141 *Jun 28, 1939Aug 12, 1941Dusco John JValve
US2536486 *Apr 27, 1945Jan 2, 1951Berry Motors IncFluid power device
US2568356 *Mar 5, 1948Sep 18, 1951Tony M MouldenVariable displacement pump
US2617257 *Dec 10, 1948Nov 11, 1952Oilgear CoControl valve and operating means therefor
US2696788 *Feb 13, 1951Dec 14, 1954Bendix Aviat CorpVariable volume constant pressure pump
US2797706 *Mar 1, 1952Jul 2, 1957Teddington Aircraft Coutrols LFluid flow control valves
US2858851 *Sep 16, 1954Nov 4, 1958Holl James W FPush-pull valve
US2951505 *Jul 8, 1957Sep 6, 1960Dynex IncSlide plate type hydraulic valve
US2964058 *Mar 21, 1957Dec 13, 1960Cleveland Pneumatic Ind IncHydraulic valve with controlled bypass to reduce operational sensitivity
FR966043A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3323461 *Jan 21, 1965Jun 6, 1967Bennett Richard AMetering pump
US3324888 *Oct 23, 1964Jun 13, 1967Republic Mfg CompanyThree-way, two-position valve
US3610285 *Dec 11, 1969Oct 5, 1971Scovill Manufacturing CoSliding valve
US3678959 *Jul 30, 1970Jul 25, 1972Richard B LiposkyHand operable selector valve
US3763891 *Jan 13, 1972Oct 9, 1973Stiltner MControl valve
US3771560 *Apr 21, 1972Nov 13, 1973Follett CorpIce diverter valve and control system therefor
US3771561 *Mar 14, 1972Nov 13, 1973Santamaria JValve
US3782863 *Nov 16, 1971Jan 1, 1974Rupp Co WarrenSlide valve apparatus
US3805833 *Jan 12, 1973Apr 23, 1974Teed GBack-suction diverter valve
US3811248 *Apr 7, 1972May 21, 1974Zimmermann A MaschbauApparatus for reversing the conveying-air in pneumatic suction-conveying installations
US3931368 *Feb 4, 1974Jan 6, 1976Ford Motor CompanyFuel flow proportioning valve
US4340203 *Oct 14, 1980Jul 20, 1982Deltrol Corp.Three way slide valve with center return
US4453453 *Jun 10, 1981Jun 12, 1984Heilmeier & Weinlein Fabrik Fuer Oel-Hydraulik Gmbh & Co. Kg.Hydraulic control device
US4524951 *Jun 15, 1981Jun 25, 1985Gt Development CorporationCenter-position biased slide valve
US4625623 *Jun 29, 1984Dec 2, 1986Allied CorporationBrake booster
US5983940 *Sep 23, 1998Nov 16, 1999National Seating CompanySpring biased rotary air valve
US7409967 *Apr 3, 2007Aug 12, 2008Stewart Systems, Inc.Pattern former for wrapped bakery products and method for loading and unloading bakery products
Classifications
U.S. Classification137/625.68, 137/625.25, 137/625.48
International ClassificationF04B53/10, F16K11/065
Cooperative ClassificationF16K11/0655, F04B53/102
European ClassificationF16K11/065B, F04B53/10D