Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-05-24
1991-08-06
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
137112, 303 14, 303 68, 303 842, 303119, 303117, B60T 832
Patent
active
050371614
ABSTRACT:
The combination isolation and check valve includes a valve member (80, 180) which has a reduced diameter section (82, 182) and an enlarged diameter section (84, 184) disposed in respective bore sections (70, 74) separated by an intermediate diameter bore section (72). The valve member can be displaced by increased fluid pressure to sealingly engage a seal (95) that isolates a master cylinder (12) from an adaptive braking system (10, 120). A flapper valve mechansm (110) that places an rifice (114) at a valve member end opening (96A) communicating with a longitudinal opening (96) and a transverse opening (93). The orifice (114) reduces pressure transmitted from a pump (45) to the bore (22) containing the valve member (80) without restricting fluid flow between the master cylinder (12) and an associated wheel brake (50). The valve mechanism (210) may be disposed in a passage (41) that communicates with the valve member (180).
REFERENCES:
patent: 4685749 (1987-08-01), Otsuki et al.
patent: 4838620 (1989-06-01), Sypniewski
patent: 4962975 (1990-10-01), Kervagoret
Allied-Signal Inc.
Butler Douglas C.
Decker Ken C.
Palguta Larry J.
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