Motors: expansible chamber type – Independently operated timer – delay – pattern or cyclic control – Independent distributor actuation for cyclic control
Patent
1988-07-25
1990-04-24
Look, Edward K.
Motors: expansible chamber type
Independently operated timer, delay, pattern or cyclic control
Independent distributor actuation for cyclic control
91304, 91321, 91330, 91417R, 91461, 74578, F15B 2102
Patent
active
049190393
ABSTRACT:
A turning gear is used to rotate a turbine rotor under conditions where it is heating up or cooling down without sufficient motive fluid to cause it to rotate. The turning gear avoid the occurence of a thermal bow. A hydraulic turning gear is disclosed for application in confined areas where a substantial force is required to provide rotation to the rotor. A booster cylinder is used to elevate low pressure fluid for use in a reduced diameter hydraulic cylinder. A ratchet wheel and pawl mechanism uses an adjustable friction force to withhold the pawl from the ratchet wheel after initial contact and further employs a stationary guide rail to reset the pawl for the next contact.
REFERENCES:
patent: 2238317 (1941-04-01), Gensburg
patent: 2592940 (1952-04-01), Monoyer
patent: 2803110 (1957-08-01), Chittenden
patent: 2947187 (1960-08-01), Graff et al.
patent: 2970546 (1961-02-01), White
patent: 3791230 (1974-02-01), Webb
patent: 4018094 (1977-04-01), Schmidt
patent: 4768420 (1988-09-01), Korthaus
patent: 4811651 (1989-03-01), Hata et al.
General Electric Company
Look Edward K.
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