Patent US4012183A successfully refreshed from Google Patents.
US4012183A
Expired / Lapsed
US
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Rotary vane compressor with vane extension means
Assignee: Borg Warner Corp
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Filing: 1975-12-09
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Granted: 1977-03-15
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Expires: 1995-12-09
Abstract
Abstract A rotary sliding vane compressor having means for biasing the vanes outwardly. Such means include a resilient element located in the lower portion of the vane slot and engaging a convexly shaped edge on the vane. The flexing action of the resilient member insures that the vanes will be moved outwardly during the expansion phase of rotor travel.
Inventors
- 👤 Peter Trent Calabretta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:06
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0827; F01C21/0845
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
In a rotary compressor of the type including a cylindrical rotor having a plurality of extensible vanes received in complementary vane slots, the improvement comprising: means defining a convex edge on the radially inner portion of said vanes, and a resilient element engageable with said convex edge, said resilient element comprising a metal spring member and an elastomeric member bonded thereto having an intermediate section normally spaced from the bottom of said vane slots and adapted to flex downwardly upon engagement by said vane, said resilient element being sufficiently rigid to prevent collapse thereof in response to increased centrifugal forces.
Claim 2
Dependent Claim
100 words
In a rotary compressor of the type including a cylindrical rotor having a plurality of extensible vanes received in complementary vane slots, the improvement comprising: means defining a convex edge on the radially inner portion of said vanes, and a resilient element engageable with said convex edge, said resilient element comprising a metal spring member and an elastomeric member bonded thereto having an intermediate section normally spaced from the bottom of said vane slots and adapted to flex downwardly upon engagement by said vane, said resilient element being sufficiently rigid to prevent collapse thereof in response to increased centrifugal forces.
Claim 3
Dependent Claim
29 words
Apparatus as defined in claim 1 including mutually engageable means on said vanes and said resilient elements to prevent lateral movement of said resilient elements in said vane slots.
Claim 4
Dependent Claim
30 words
Apparatus as defined in claim 1 wherein said elastomeric member is provided with spherically shaped terminal portions received in complementary sockets formed at the ends of each said vane slot.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |