Patent US4259930A successfully refreshed from Google Patents.
US4259930A
Expired / Lapsed
US
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Device for starting a stationary unit
Assignee: Volkswagen AG
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Filing: 1979-07-26
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Granted: 1981-04-07
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Expires: 1999-07-26
Abstract
Abstract A device for starting a stationary unit, which unit includes a prime mover, e.g. an internal combustion engine, and a machine, e.g. a compressor of a heat pump system, rigidly coupled thereto by a shaft, has a flywheel fitted on the shaft. This flywheel is automatically engaged and disengaged from the shaft, according to the speed of the flywheel, by means of a clutch.
Inventors
- 👤 Peter Hofbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:06
CPC Classifications
F; F02; F02N; F02N5/00; F02N5/04; F02N11/00; F02N11/08; Y; Y10; Y10T; Y10T74/00; Y10T74/13; Y10T74/131; Y10T74/134
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A device for starting a stationary unit including a prime mover, e.g. an internal combustion engine, and a machine rigidly coupled thereto, e.g. a compressor of a heat pump system, wherein the device includes a flywheel fitted on a common shaft connecting the prime mover and the machine, which flywheel is engageable and disengageable from the shaft by means of a clutch and is driveable by a starter, characterized in that the clutch is actuated automatically according to the speed of the flywheel.
Claim 2
Independent Claim
83 words
A device for starting a stationary unit including a prime mover, e.g. an internal combustion engine, and a machine rigidly coupled thereto, e.g. a compressor of a heat pump system, wherein the device includes a flywheel fitted on a common shaft connecting the prime mover and the machine, which flywheel is engageable and disengageable from the shaft by means of a clutch and is driveable by a starter, characterized in that the clutch is actuated automatically according to the speed of the flywheel.
Claim 3
Dependent Claim
27 words
A device according to claim 1, characterized in that the clutch is engageable at a flywheel speed higher than the speed at which the clutch is disengageable.
Claim 4
Dependent Claim
51 words
A device as claimed in claim 1 or 2 wherein the clutch is operated by a servomotor in response to signals generated by a speed sensor monitoring the flywheel speed, said speed signals being compared to preassigned values in a control unit so as to control the actuation of said servomotor.
Claim 5
Dependent Claim
20 words
A device as claimed in claim 1 wherein the starter is disengageable from said flywheel upon engagement of said clutch.
References Cited (Backward Citations)
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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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |