Master cylinder piston with floating sealing ring recuperation v

Details Master cylinder piston with floating sealing ring recuperation v Master cylinder piston with floating sealing ring recuperation v

1988-01-22

1989-09-19

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Pulsator

60585, 60589, 92241, B60T 1128, F15B 708

Patent

active

048669385

ABSTRACT:
A hydraulic master cylinder piston carries a circumferential seal ring which allows recuperation flow valving. The floating seal has a reinforcing metal girdle which prevents radial expansion and axial crushing. The seal material resists extrusion and has an outer radius slightly greater than the radius of the circumferential girdle. A forward slotted bearing ring maintains the piston in alignment with the bore. During piston return, recuperation occurs through a path comprising the radial clearance between piston and floating seal ring and at least one slot or groove in the bearing ring. Upon full piston return, the seal is withdrawn from the master cylinder working chamber into a larger diameter bore communicating with the reservoir and thus allows relatively free make-up flow.

REFERENCES:
patent: 2377017 (1945-05-01), Lacoe
patent: 2396155 (1946-03-01), Christensen
patent: 2512098 (1950-06-01), Gratzmuller
patent: 2659566 (1953-11-01), Rand
patent: 2992870 (1961-07-01), Carlson et al.
patent: 3009721 (1961-11-01), Newton
patent: 3141303 (1964-07-01), Baldwin
patent: 3319537 (1967-05-01), Pittman
patent: 3980004 (1976-09-01), Jones et al.
patent: 4027816 (1977-06-01), Slator et al.
patent: 4099380 (1978-07-01), Cadeddu
patent: 4219204 (1980-08-01), Pippert
patent: 4602791 (1986-06-01), Zollner
patent: 4630833 (1986-12-01), Boyle et al.

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