Power plants – Pressure fluid source and motor – Pulsator
Reexamination Certificate
2006-09-19
2006-09-19
Look, Edward K. (Department: 3745)
Power plants
Pressure fluid source and motor
Pulsator
C060S593000, C091S378000, C029S401100, C029S888011
Reexamination Certificate
active
07107769
ABSTRACT:
A combined master cylinder and dump valve includes a piston slideable within a body bore that defines a master cylinder for pressurizing a brake port. The piston includes a piston seal for isolating a pressure port from a tank port, a piston bore, a first piston hole set for hydraulically connecting the pressure port to the piston bore and a second piston hole set for hydraulically connecting the piston bore to the tank port. A plunger slideably received in the piston bore has a plunger hole set for selectively connecting the first piston hole set with a plunger bore, and a plunger seal arrangement for selectively isolating the first piston hole set from the plunger bore. The plunger bore is hydraulically connected to the piston bore.
REFERENCES:
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patent: 3543508 (1970-12-01), Schwab
patent: 3797244 (1974-03-01), Waters
patent: 4359869 (1982-11-01), Ideta
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patent: 6912851 (2005-07-01), Batchelor et al.
patent: 1 122 798 (1968-08-01), None
patent: 1 238 861 (1971-07-01), None
MICO, Modulating hydraulic power brake valve, pp. 20-23.
United Kingdom Search Report dated Jan. 21, 2004.
European Search Report dated Jul. 5, 2005.
Carlisle Brake Products (UK) Ltd.
Leslie Michael
Look Edward K.
Wood Herron & Evans L.L.P.
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