US5201643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression machine
Assignee: Aisin Corp
•
Filing: 1991-03-29
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Granted: 1993-04-13
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Expires: 2011-03-29
Abstract
Abstract In a high volumetric efficiency compression machine that can be used as a compressor, pump, or actuator, a compression chamber is formed by a movable body and the inner wall of a casing. A discharge valve is formed in the casing, and communicates with the compression chamber. Two intake valves are formed in the casing, communicate with the compression chamber and are arranged symmetrically with respect to the axial direction of the discharge valve. A rod transmits reciprocation to the movable body.
Inventors
- 👤 Koichiro Hirosawa
- 👤 Hiroshi Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:10
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B53/143; F04B39/00; F04B39/04; F04B39/041; F04B39/042; F04B39/10; F04B53/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
A compression machine comprising: a casing having an inner wall; a movable body mounted within said casing such that a compression chamber is formed by the movable body and the inner wall of the casing; a single discharge valve formed in the casing and comprising means for discharging fluid from the compression chamber; two intake valves formed in the casing and comprising means for permitting entry of fluid into the compression chamber, the two intake valves being arranged symmetrically with respect to the axial direction of the discharge valve; and a rod connected to the movable body so as to transmit reciprocal movement to the movable body; whereby changes in the volume of the compression chamber opens or shuts the intake valves and discharge valve, wherein each of said intake valves has an aperture area equal to an aperture area of said discharge valve.
Claim 2
Dependent Claim
144 words
A compression machine comprising: a casing having an inner wall; a movable body mounted within said casing such that a compression chamber is formed by the movable body and the inner wall of the casing; a single discharge valve formed in the casing and comprising means for discharging fluid from the compression chamber; two intake valves formed in the casing and comprising means for permitting entry of fluid into the compression chamber, the two intake valves being arranged symmetrically with respect to the axial direction of the discharge valve; and a rod connected to the movable body so as to transmit reciprocal movement to the movable body; whereby changes in the volume of the compression chamber opens or shuts the intake valves and discharge valve, wherein each of said intake valves has an aperture area equal to an aperture area of said discharge valve.
Claim 3
Dependent Claim
27 words
The compression machine of claim 1 wherein said movable body includes a plate mounted to said rod and a bellows connected between said plate and said casing.
Claim 4
Dependent Claim
27 words
The compression machine of claim 1 wherein said movable body includes a plate mounted to said rod and a bellows connected between said plate and said casing.
Claim 5
Dependent Claim
23 words
The compression machine of claim 1, wherein said discharge valve has a recessed portion into which can fit a head of said rod.
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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) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |