Brakes – Wheel – Axially movable brake element or housing therefor
Reexamination Certificate
2006-11-14
2006-11-14
Schwartz, Chris (Department: 3683)
Brakes
Wheel
Axially movable brake element or housing therefor
C188S072400, C188S10600P
Reexamination Certificate
active
07134533
ABSTRACT:
In a brake apparatus, a lead in a meshed portion between an external-thread portion (second stationary screw element) of a threaded shaft and an internal-thread portion (second movable screw element) of a nut is shorter than that in a meshed portion between an internal-thread portion (first stationary screw element) of a cylinder and an external-thread portion (first movable screw element) of a second piston. Accordingly, as the second piston and the nut move toward a control chamber while rotating in a unitary condition via a friction clutch, the second piston and the nut are united via the friction clutch, so that a contact portion between the thread surface of the second stationary screw element and the thread surface of the second movable screw element and a contact portion between the thread surface of the first stationary screw element and the thread surface of the first movable screw element push out against each other.
REFERENCES:
patent: 4215767 (1980-08-01), Shirey
patent: 4793447 (1988-12-01), Taig et al.
patent: 5348123 (1994-09-01), Takahashi et al.
patent: 6230855 (2001-05-01), Holding
patent: 6311808 (2001-11-01), Halasy-Wimmer et al.
patent: 2005/0252732 (2005-11-01), Hashida et al.
patent: 2000-504811 (2000-04-01), None
Advics Co., Ltd.
Schwartz Chris
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