Power plants – Pressure fluid source and motor – Pulsator
Patent
1986-08-26
1988-01-12
Chambers, A. Michael
Power plants
Pressure fluid source and motor
Pulsator
60578, 60589, B60T 1120
Patent
active
047182342
ABSTRACT:
The master cylinder (10) comprises a housing (12) having a longitudinal bore (14), an end (24) enclosed by a bearing member (18) which retains a sleeve member (20) within the bore (14), a reservoir (70) mounted on the housing (12) and a pair of pistons (30, 40) slidably received within the bore (14), one piston (30) extending through the end (24) of the sleeve member (20). The one piston (30) has a reduced diameter end (32) which provides seating for a fast fill valving mechanism (110). The fast fill valving mechanism (110) comprises a fast fill seal (120) having a flexible arm (122) engaging an interior surface of the sleeve member (20) and the sleeve member (20) having longitudinal grooves (22) adjacent the arm (122), a fast fill spring member (140) trapped between the fast fill seal (120) and a land member (130), the land member (130) having pockets (132) covered by the fast fill spring member (140) and the pockets (132) communicating with passages (133) in the land member (130). The land member (130) engages a flexible seal (90) engaging an interior surface (23) of the sleeve member (20). Displacement of the one piston (30) within the bore (14) creates an increasing pressure which will, at a predetermined higher pressure, cause the fast fill spring member (140) to bow into the pockets (132) and permit fluid passage therearound and through the land member (130) to an auxiliary chamber (170) defined by the land member (130), flexible seal (90), and the sleeve member (20).
REFERENCES:
patent: 2291056 (1942-07-01), Pallady
patent: 3043404 (1962-07-01), Peras et al.
patent: 4329846 (1982-05-01), Gaiser
patent: 4474005 (1984-10-01), Steer
patent: 4559781 (1985-12-01), Steer et al.
Allied Corporation
Chambers A. Michael
Decker Ken C.
Palguta Larry J.
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