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03/22/07 - USPTO Class 417 |  29 views | #20070065321 | Prev - Next | About this Page  417 rss/xml feed  monitor keywords

Elastomeric reciprocating compressor valve spring

USPTO Application #: 20070065321
Title: Elastomeric reciprocating compressor valve spring
Abstract: An elastomeric storage device for use in a gas compressor valve is provided. Reciprocating gas compressor valves use these storage devices to control the closing of a valve sealing element. (end of abstract)



Agent: Carol M. Nielsen Winstead Sechrest & Minick, P.C. - Houston, TX, US
Inventor: Kevin Patrick Durham
USPTO Applicaton #: 20070065321 - Class: 417559000 (USPTO)

Related Patent Categories: Pumps, Expansible Chamber Type, Having Pumping Chamber Pressure Responsive Distributor

Elastomeric reciprocating compressor valve spring description/claims


The Patent Description & Claims data below is from USPTO Patent Application 20070065321, Elastomeric reciprocating compressor valve spring.

Brief Patent Description - Full Patent Description - Patent Application Claims
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CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims priority under Title 35, United States Code, .sctn. 119 to provisional application U.S. Pat. App. Ser. No. 60/718,994 filed Sep. 21, 2005

FIELD OF THE INVENTION

[0002] This invention is directed to dramatically improving the reliability, durability and longevity of energy storing devices such as springs in reciprocating gas compressor valves.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

[0003] None.

THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT

[0004] None.

REFERENCE TO SEQUENCE LISTING

[0005] None.

BACKGROUND OF THE INVENTION

[0006] Current state of the art metal spring designs can withstand a tremendous number of cycles. But even the most advanced metal spring designs with the most advanced metal treatments are not able to keep up with advanced technologies in other areas of the reciprocating gas compressor valve. The spring is a weak link in the valve system.

[0007] Reciprocating gas compressor valves are currently designed with metal springs in some form or combination of forms to control the timing of the valve element closure. Reciprocating compressor valves open and close as a result of the differential pressures that are created as the compressor piston compresses the trapped gas and raises the pressure of the gas from a lower pressure to a higher pressure as it moves through its stroke. The sealing elements in a reciprocating compressor valve open and close with each stroke of the compressor for the purpose of expelling gas from the cylinder or allowing new low pressure gas to enter the cylinder. Reciprocating gas compressors typically operate at speeds between 200 rpm and 1800 rpm, gas temperatures can range from the cryogenic region to 400 F. and pressures can vary from vacuum to 10,000 psi or higher and the advancement of material technologies is increasing the size of the operating envelope.

[0008] Operators of reciprocating gas compressors demand more operating hours between overhauls. Unscheduled compressor shutdowns to replace failed parts is expensive and lowers overall plant efficiencies. A need exists therefore to replace the current state of the metal spring materials and designs with new materials and designs capable of extending the mean time between failures. A need also exists for an improved valve spring that can be used in connection with a reciprocating gas compressor valve to provide improved reliability and durability of the valve assembly.

BRIEF SUMMARY OF THE INVENTION

[0009] The present invention is an energy storage device such as a valve spring comprising elastomeric material. Elastomeric material is a material or substance having one or more elastomers, an elastomeric compound or compounds used together, or a combination of elastomer or elastomeric compounds with other substances. The elastomeric material used in connection with the valve spring may be a single type of elastomer or may be a compound or combination of substances as described below. Hence, the valve spring may be made entirely of elastomer or as a composite where the elastomer may be bonded to or combined with other materials for improved mechanical properties. Elastomers have the inherent ability to dissipate energy from shocks and collisions, superior fatigue resistance and the ability to recover from elastic strains.

[0010] The subject invention also provides a reciprocating gas compressor valve containing at least one elastomeric valve spring. The elastomeric valve spring of the present invention can be placed between a guard and surface of a sealing element of the compressor valve to absorb and exert energy necessary to move the sealing element toward an opposing seating surface for many compression cycles without spring failure. Furthermore, the present invention provides a method of making a reciprocating gas compressor valve by assembling at least one elastomeric spring, guard, sealing element and seating surface into a valve and using the assembled compressor valve in a reciprocating gas compressor.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG. 1 is a schematic view of an embodiment of the present invention.

[0012] FIG. 2 is a top view of the spring of FIG. 1.

[0013] FIG. 3 is a cross-sectional view of the spring of FIG. 1.

[0014] FIG. 4 is a side view of an embodiment of the present invention.

[0015] FIG. 5 is a side view of an embodiment of the present invention.

[0016] FIG. 6 is a side view of an embodiment of the present invention.

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