Patent US4388808A successfully refreshed from Google Patents.
US4388808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swash plate driving means for cryogenic coolers
Assignee: United States Department of the Army
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Filing: 1982-02-17
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Granted: 1983-06-21
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Expires: 2002-02-17
Abstract
Abstract Swash plate driving means for cryogenic coolers wherein multiple compress and regenerators are driven. The swash plate driving means may drive one or more compressors off one or both sides of each swash plate, and one or more regenerators may simultaneously be driven by separate swash plates. The swash plates are formed to provide flat topped and bottomed repetitive pressure waves.
Inventors
- 👤 Peter Durenec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:18
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F01; F01B; F01B3/00; F01B3/0032; F01B3/0044; F01B3/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A swash plate driving means for cryogenic coolers, said driving means comprising: a shaft rotating means having at least one swash plate on the shaft rotated thereby; compressor means comprised of a plurality of piston rods interacting between said at least one swash plate and compression cylinders to produce pressure waves in a plurality of compression volumes; and a regenerator means in a separate housing from said compressor means, said regenerator means comprised of a plurality of displacer regenerators operatively interacting with at least said pressure waves of said compressor means to provide cooling at a cold station within said regenerator means.
Claim 2
Dependent Claim
102 words
A swash plate driving means for cryogenic coolers, said driving means comprising: a shaft rotating means having at least one swash plate on the shaft rotated thereby; compressor means comprised of a plurality of piston rods interacting between said at least one swash plate and compression cylinders to produce pressure waves in a plurality of compression volumes; and a regenerator means in a separate housing from said compressor means, said regenerator means comprised of a plurality of displacer regenerators operatively interacting with at least said pressure waves of said compressor means to provide cooling at a cold station within said regenerator means.
Claim 3
Dependent Claim
94 words
A driving means as set forth in claim 1 wherein said shaft rotating means is an electric motor which drives a shaft having a compressor swash plate on one end that interacts with said plurality of piston rods in said compressor means and a regenerator swash plate on the other end that interacts with said plurality of displacer regenerators in said regenerator means to provide an integral Stirling cycle cryogenic cooler wherein said plurality of displacer regenerators receive said pressure waves from said compressor means and is simultaneously driven by said regenerator swash plate.
Claim 4
Dependent Claim
43 words
A driving means as set forth in claim 2 wherein said plurality of piston rods are equally spaced and operate off both sides of said compressor swash plate and said plurality of displacer regenerators operate off both sides of said regenerator swash plate.
Claim 5
Dependent Claim
58 words
A driving means as set forth in claim 2 wherein said regenerator swash plate has a slider face thereon that operates as a slider for the ends of the plurality of displacer shafts operable with the plurality of displacer regenerators that ride thereon whereby rotation of said regenerator swash plate transmits reciprocating linear motion of said displacer shafts.
Claim 6
Dependent Claim
43 words
A driving means as set forth in claim 4 wherein the slider face of said regenerator swash plate has inclined portions meeting at a flat top portion wherein said flat top portion provide flat tops pressure waves for said plurality of displacer regenerators.
Claim 7
Dependent Claim
31 words
A driving means as set forth in claim 5 wherein said flat top portion is about 35% of the distance the ends of each displacer shaft travels around said slider face.
Claim 8
Dependent Claim
72 words
A driving means as set forth in claim 6 wherein said plurality of piston rods have bellows secured to the low pressure side between said rods and the housing of said compressor means and said plurality of displacer shafts have bellows secured between said shafts and the housing of said regenerator means to prevent contamination of cryogenic cooler working fluid with the lubricant used in the cavities where said swash plates operate.
Claim 9
Dependent Claim
50 words
A driving means as set forth in claim 7 wherein said compressor swash plate further has a slider face comprised of inclined portions meeting at a flat top portion which is 35% of the distance that the ends of each of said plurality of pistons travels around said slider face.
Claim 10
Dependent Claim
115 words
A driving means as set forth in claim 7 wherein said compressor swash plate is comprised of a pin connected by welding means at the end of said shaft at an oblique angle and having a rotary bearing surrounding said pin wherein said rotary bearing is comprised of an inner ring that is hard connected to said pin and end of shaft and a bearing upon which an outer ring rides when said inner ring is rotated by said shaft wherein said outer ring has the ball bearing ends of said plurality of piston rods press fitted into said outer ring whereby said outer ring imposes reciprocal linear motion to said plurality of piston rods.
Claim 11
Dependent Claim
43 words
A driving means as set forth in claim 7 wherein said plurality of piston rods and compression cylinders are evenly spaced around said compressor swash plate and said plurality of displacer shafts and regenerator displacers are evenly spaced around said regenerator swash plate.
Claim 12
Dependent Claim
25 words
A driving means as set forth in claim 10 wherein the dimensions of said plurality of compression cylinders and said displacer regenerator may be different.
Claim 13
Dependent Claim
52 words
A driving means as set forth in claim 1 wherein said regenerator means is comprised of a plurality of separate regenerators with each of said plurality of separate regenerators workably connected by working fluid feed lines from said plurality of compression volumes to provide a plurality of split Stirling cycle cryogenic coolers.
Claim 14
Dependent Claim
52 words
A driving means as set forth in claim 1 wherein said regenerator means is comprised of a cluster of regenerators within one dewar with each regenerator of said cluster of regenerators workably connected by working fluid feed lines from said plurality of compression volumes to provide a split Stirling cycle cryogenic cooler.
Claim 15
Dependent Claim
52 words
A driving means as set forth in claim 1 wherein said regenerator means is comprised of multistage precooled regenerator wherein one each of said fluid feed lines from said compressor means are connected to an input of each regenerator of said multistage precooled regenerator to provide a split Stirling cycle cryogenic cooler.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |