Brakes – Operators – Fluid pressure
Patent
1995-06-15
1996-10-08
Graham, Matthew C.
Brakes
Operators
Fluid pressure
251216, F16K 3144
Patent
active
055621880
ABSTRACT:
An air bleed valve (40) includes a valve base (42), a valve cap (44) and an O-ring seal (46). The valve base (42) includes an inner threaded portion (58) that screws into a threaded bore (12) in the wall (14) of a linear actuator (16) and an inner end conical sealing surface (54) that is in sealing contact with a valve seat (18) in the linear actuator. A bleed air passage (48) through the valve base (42) is in communication with the linear actuator through a smooth walled bore (20). A valve cap (44) screws onto the outer threaded portion (64) of the valve base (42). When the air bleed valve (40) is closed, the conical cap valve surface (72) closes the bleed air passage (48). A conical cap thread protection sealing surface (96) is contacted by cap thread sealing surface (102) on a deformable flange 100 to protect threads 64 and 68 from corrosive materials. To open the valve (40) the valve cap (44) is rotated relative to the valve base (42) to separate the conical cap valve surface (72) from the conical base valve seat (74) and form a discharge chamber (88) which conveys air from the bleed air passage (48) to the discharge passage (76).
REFERENCES:
patent: 660128 (1900-10-01), Sowle
patent: 2892614 (1959-06-01), Majneri
patent: 3578285 (1971-05-01), Carlton
patent: 3727638 (1973-04-01), Zaremba, Jr. et al.
patent: 4470577 (1984-09-01), Warwick
patent: 4474272 (1984-10-01), Omlie
patent: 4834140 (1989-05-01), Schmidt
patent: 5447214 (1995-09-01), Appelgren
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