Patent US3749523A successfully refreshed from Google Patents.
US3749523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swash plate gas compressor
Assignee: Caterpillar Inc
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Filing: 1971-12-27
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Granted: 1973-07-31
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Expires: 1991-12-27
Abstract
Abstract A gas compressor comprises substantially identical cylinder block heads having interconnected fluid passages cast therein. A plurality of pistons, reciprocally mounted in the cylinder blocks, each have a thrust bearing shoe adjustably mounted thereon. A swash plate reciprocates each piston through a ball bearing which engages a respective bearing shoe.
Inventors
- 👤 T Wahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:26
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/06; F04B1/00; F04B1/12; F04B1/122; F04B1/124; F04B27/00; F04B27/08; F04B27/10; F04B27/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
A compressor comprising a housing, a swash plate mounted for rotation about a longitudinal axis in said housing, at least one piston reciprocally mounted in a cylinder bore formed in said housing for movement in the direction of said axis, and drive means drivingly connecting said swash plate to said piston, including adjustment means, comprising a cup member threadably mounted on said piston and disposed between said swash plate and said piston, for adjusting the axial distance between said swash plate and said piston.
Claim 2
Dependent Claim
84 words
A compressor comprising a housing, a swash plate mounted for rotation about a longitudinal axis in said housing, at least one piston reciprocally mounted in a cylinder bore formed in said housing for movement in the direction of said axis, and drive means drivingly connecting said swash plate to said piston, including adjustment means, comprising a cup member threadably mounted on said piston and disposed between said swash plate and said piston, for adjusting the axial distance between said swash plate and said piston.
Claim 3
Dependent Claim
27 words
The invention of claim 1 wherein said adjustment means further comprises lock means for releasably locking said cup member in a selected rotative position on said piston.
Claim 4
Dependent Claim
35 words
The invention of claim 2 wherein said lock means comprises a serrated ring secured to said cup member and a resilient spring member secured to said piston to normally engage a serration of said ring.
Claim 5
Dependent Claim
31 words
The invention of claim 1 wherein said drive means further comprises a second cup member in slidable contact with said thrust plate and a ball bearing seated in said cup members.
Claim 6
Dependent Claim
34 words
The invention of claim 1 further comprising a second piston axially opposed to said first-mentioned piston and a bridging connection interconnecting said pistons for effecting simultaneous movement thereof upon rotation of said swash plate.
Claim 7
Dependent Claim
26 words
The invention of claim 5 wherein said compressor comprises a plurality of said interconnected pistons reciprocally mounted in said housing in radial disposition about said axis.
Claim 8
Dependent Claim
71 words
The invention of claim 1 wherein said housing comprises two substantially identical and abutting cylinder blocks, each having a plurality of said pistons mounted therein, and substantially identical cylinder heads, each attached to an end of a respective cylinder block, and further comprising passage means, formed entirely within said housing, for communicating fluid to said cylinder bores and for further communicating said fluid from said cyinder bores, exteriorly of said compressor.
Claim 9
Dependent Claim
44 words
The invention of claim 7 further comprising intake and exhaust reed plates and an intermediate spacer plate all secured between each adjacent cylinder block and head, each of said reed plates comprising a normally closed reed valve exposed to each of said cylinder bores.
Claim 10
Dependent Claim
49 words
The invention of claim 8 wherein said passage means comprise means forming intake chambers and ports positioned to communicate fluid into said cylinder bores and means forming exhaust chambers and ports, substantially surrounded by said intake chambers and ports, positioned to communicate compressed fluid out of said cylinder bores.
Claim 11
Dependent Claim
33 words
The invention of claim 1 wherein said swash plate is secured to a shaft rotatably mounted by spaced bearings in said housing and further comprising lubricating means for communicating lubricant to said bearings.
Claim 12
Dependent Claim
21 words
The invention of claim 1 further comprising means for circulating a coolant through said housing in close proximity to said piston.
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |