Expansible chamber devices – With releasable latch means between working member and power...
Patent
1990-02-20
1991-05-28
Kwon, John T.
Expansible chamber devices
With releasable latch means between working member and power...
92 18, 92 19, 92130R, 188 77R, 188 96P, F01B 900
Patent
active
050184342
ABSTRACT:
The present invention is directed to a self-adjusting servo mechanism (10). The servo pin (30) presented from the servo mechanism (10) will protract sufficiently to effect operative engagement of a friction band assembly (13) with a rotating member (18) in a planetary gear set--even though the required axial displacement of the servo pin (30) during such protraction may exceed the axial displacement through which the servo pin (30) was previously retracted. The servo mechanism (10) is incorporated in a housing (20). The housing (20) presents a socket cavity (24) within which an actuating piston (33) is received for axial displacement. The servo pin (30) is supported by the housing (20) for axial reciprocation with the actuating piston (33), and a range locating device (35) is interposed between the servo pin (30) and the housing (20) to permit protraction of the servo pin (30) in response to displacement of the actuating piston (30) through whatever range of axial displacement is required for the servo pin (30) to operate the friction band assembly (13). The range locating device (35) also assures that the servo pin (30) will always retract through a predetermined range, irrespective of the distance through which the servo pin (30) had previously been retracted.
REFERENCES:
patent: 1715406 (1929-06-01), Christenson
patent: 3115220 (1963-12-01), Calle
patent: 3353637 (1967-11-01), Chana
patent: 3605959 (1971-09-01), Beck
patent: 4387901 (1983-06-01), Ritsema
patent: 4388986 (1983-06-01), Umezawa
patent: 4881453 (1989-11-01), Armstrong
patent: 4907491 (1990-03-01), Filip
General Motors Corporation
Kwon John T.
Mattingly Todd
Scherer Donald F.
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