Pumps – Including disengageable rotary or frangible drive connection
Patent
1988-02-04
1989-10-03
Croyle, Carlton R.
Pumps
Including disengageable rotary or frangible drive connection
418 69, 192105B, F04B 3500
Patent
active
048712990
ABSTRACT:
The compressor unit consists of a screw compressor (2) and a drive motor (1), which is connected for drive purposes to the screw compressor (2) by way of an engageable and disengageable clutch (3) and can be temporarily stopped in order to control the throughput of the screw compressor (2). To allow starting of the compressor unit without the drive motor (1) becoming thermally overloaded, the clutch inserted between the drive motor (1) and screw compressor (2) is in the form of a known centrifugal clutch (3), the driving clutch member (17) being connectable to the driven clutch member (18) by means of friction plates (23, 28). For automatic operation of the centrifugal clutch (3), a control chamber (21) is provided, the presser plate (36) of which is adjustable against the friction plates (23, 28) by means of centrifugal weights (34). The presser plate (36) can be provided with return springs (40) and one of the friction plates (23) of the driving clutch member (17) can be pressed against the presser plate (36) of the control chamber (21) by one or more annular springs (41). Ventilation bores (45) and ventilation slots (46) are provided in the friction plates (23).
REFERENCES:
patent: 1720766 (1929-07-01), Spahr
patent: 1850226 (1932-03-01), Dickson
patent: 2459709 (1949-01-01), Lysholm
patent: 3002597 (1961-10-01), Warman, Jr. et al.
patent: 3171524 (1965-03-01), Croft et al.
patent: 3762519 (1973-10-01), Bentley
patent: 3953787 (1976-04-01), Helbling
patent: 4561827 (1985-12-01), Beaumont
patent: 4643282 (1987-02-01), Edl
Croyle Carlton R.
Hoerbiger Ventilwerke Aktiengesellschaft
Walnoha Leonard P.
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