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Publication numberUS1660588 A
Publication typeGrant
Publication dateFeb 28, 1928
Filing dateJun 21, 1926
Priority dateJun 21, 1926
Publication numberUS 1660588 A, US 1660588A, US-A-1660588, US1660588 A, US1660588A
InventorsWilliam Wishart, Wishart Harold W
Original AssigneeClimax Engineering Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Discharge valve
US 1660588 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Fen 2%, 19280 7 1,6605

. H. W. WESHART ET AL DISCHARGE VALVE Filed June 21, L925 W 2' )2 7m Wis/7a):


msonanen' VALVE.

Application filed June 21, 1926. Serial No. 117,530.

This invention relates to discharge valves, with particular reference to valves adapted to be used with submerged typerotary compressors wherein there is a possibility of entry of liquid to the pump during idle periods.

It is therefore an object of this invention to provide an improved form of discharge valve for gas or air compressors adapted to provide abnormal valve lift in the event of liquid being entrained in the compressor, as when starting up there is likely to be some liquid and oil in the pump, overloading the driving mechanism in forcing the liquid out through the valve.

It is also an object of this invention to provide animproved valve for rotary compressors submerged in a'liquid in order to prevent unnecessary mixing of the compressed gas with the liquid.

' Other and further important objects of this invention will be apparent from the dis closures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described. 7

On the drawings:

Figure 1 is a fragmentary section with parts broken away to show the application of a valve embod ing the features of this invention to the side plate of a rotary compressor.

' Figure 2 is a section on the line II--II of Figure 1.

Figure 3 is {a plan view of the valve of Figure 2 with 'the cover omitted.

Figure 4 is a section of a slightly modified form of valve.

Figure 5 is a,plan view of the valve of Fi re 4.

3 shown on the drawings:

A submerged type rotary compressor is artially shown in Figure 1, the outer casing eing indicated by the reference numeral 10 and the outer side wall of the compressor cylinder proper being indicated at 11, the discharge valve of this invention being seated in a recess 12 in said wall and covering the discharge ort 13 leading from adjacent the partition blade of the (pump. The discharge valve recess is covere by a fluid tight cage 14.having an outlet pipe 15 extending above the fluid level in the casing to prevent the compressed gas from bubbling up through the liquid.

One form of this invention comprises a strip type valve spring 16 which normally seals the outlet passage or port 13 and is'secured at one end by a screw 17. The opening movement of the spring strip is limitedby a spaced abutment 18 which normally provides a suficient opening to permit discharge of the compressed gas. However, if liquid has filled the compressor as during a period of idleness, the much larger volume to be discharged necessitates a larger valve opening which vis obtained by leaving the center portion of the spring free to bow outwardly as shown in dotted lines in Figure 2, thus providing much greater discharge areas.

In the modified form shown in Figures 4 and 5 the spring valve strip 16 remains unchanged and is held at one end by the screw 17 substantially as before. The difference resides in the use of a stiffer bent backing spring 19 which forms a normal limiting stop that will yield further when abnormal pressures are developed in the compressor, as when liquid has to be ejected from the compressor at starting. We have found in practice that abnormally high starting torques have been required at times with valve passages which are normally ample for the small volume of compressed gases but which prevent the free exit of liquids.

We are aware that many changes may be made, and numerous details of construction may be varied through a wide'range without departing from the principles of this inven tion, and we therefore do not purpose limitlng' the patent anted hereon, otherwise than necessitated y the prior art.

We claim as our invention: y

1. A discharge valve for rotary compressors comprising a recess in the compressor wall together with a discharge port opening into the bottom of said recess,.a flat valve spring in said recess forming a closure for said port, means securing said spring at one end, a stop normally'determining the opening movement of said. spring, said stop adapted to permit further opening movement of sai spring under abnormal discharge (pressures, a closure for said recess and a s'charge pipe liquid bath surroun ing said compressor.

extending above the 5 2. The combination with a compressor spring adapted to form a limit for the opencylinder having an oblong recess in the outer ing movement of the free end of the spring, a 10 Wall thereof and a discharge port, opening closure sealing said recess and a discharge therein near one end of said recess, of a compipe leading from said closure.

5 pressor discharge valve in said recess com- In testimony whereof, we have hereunto prising a flat spring, means'securing the subscribed our names. spring in said recess at the endopposite the HAROLD W. WISHART.

port, means adjacent the port end of the WILLIAM WISHART.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2563200 *Oct 29, 1945Aug 7, 1951John Venning & Company LtdAutomatic relief valve
US3926214 *Jun 12, 1974Dec 16, 1975Hoerbiger Ventilwerke AgLamella valve for piston compressors
US4188973 *Dec 6, 1977Feb 19, 1980Anderson, Greenwood & Co.Check valve
US4257457 *Sep 27, 1978Mar 24, 1981Mitsubishi Denki Kabushiki KaishaDischarge valve apparatus of compressor
US5595214 *Jun 7, 1995Jan 21, 1997Asha CorporationHydraulic coupling for vehicle drivetrain
US5735764 *Oct 17, 1996Apr 7, 1998Asha CorporationHydraulic coupling for vehicle drivetrain
US5827145 *Mar 17, 1997Oct 27, 1998Asha CorporationHydraulic coupling having supplemental actuation
US5888163 *Feb 18, 1998Mar 30, 1999Asha CorporationHydraulic coupling for vehicle drivetrain
US5941788 *Jun 25, 1997Aug 24, 1999Asha CorporationVehicle drivetrain differential
US6176800Mar 16, 1999Jan 23, 2001Mclaren Automotive Group, Inc.Hydraulic coupling for vehicle drivetrain
US6413182Apr 18, 2000Jul 2, 2002Mclaren Automotive Group, Inc.Limited slip differential having thermal compensating valve for regulating torque bias
US6464056Aug 4, 2000Oct 15, 2002Mclaren Automotive Group, Inc.Electronically controlled hydraulic coupling
US7033151 *Jun 18, 2002Apr 25, 2006Lg Electronics Inc.Check valve of scroll compressor
US20050008521 *Jun 18, 2002Jan 13, 2005Su-Chul KimCheck valve of scroll compressor
WO1998041783A1 *Feb 10, 1998Sep 24, 1998Asha CorporationHydraulic coupling having supplemental actuation
U.S. Classification137/856
International ClassificationF16K15/16, F16K15/14
Cooperative ClassificationF16K15/16
European ClassificationF16K15/16