Power plants – Pressure fluid source and motor – Pulsator
Reexamination Certificate
2005-02-01
2005-02-01
Lopez, F. Daniel (Department: 3745)
Power plants
Pressure fluid source and motor
Pulsator
C060S588000, C060S589000
Reexamination Certificate
active
06848257
ABSTRACT:
A master cylinder (10) having an axial body (12) with a bore (14) for receving a piston (16, 18), a front seal (26, 28) and a rear seal (30, 32) to delimit a rear supply chamber (34, 38) from a front pressure chamber (36, 40). A supply duct (42, 48) in the body (12) that connects a reservoir to the rear supply chamber (34, 38) has an opening between the front seal (26, 28) and the rear seal (26, 28). The front seal (26, 28) is mounted in a groove (110, 112) of the body (12) and has an interior lip that contacts the piston (16, 18) and lifts off the piston (16, 18) as the piston (16, 18) returns from a position of application to a position of rest to allow hydraulic fluid to be resupply the front pressure chamber (36, 40).
REFERENCES:
patent: 4429531 (1984-02-01), Spielmann
patent: 4685301 (1987-08-01), Bacardit et al.
patent: 6425245 (2002-07-01), Attard
Bacardit Juan Simon
Berthomieu Bruno
Sacristan Fernando
Lopez F. Daniel
Robert & Bosch GmbH
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