Patent US3743060A successfully refreshed from Google Patents.
US3743060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo action parking brake with rotary actuator
Assignee: ZF Active Safety US Inc
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Filing: 1970-10-27
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Granted: 1973-07-03
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Expires: 1990-10-27
Abstract
Abstract A sliding caliper disk brake assembly incorporating a hydraulic, service actuator and a mechanical, parking actuator. The mechanical actuator includes an annular cam that is disposed concentrically with the piston of the hydraulic actuator to provide a compact assembly. An arrangement is also incorporated for generating a self-energizing force when the brake is mechanically actuated.
Inventors
- 👤 P Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:57
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/18; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D2121/00; F16D2121/02; F16D2121/14; F16D2123/00; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/36; F16D2127/00; F16D2127/08; F16D2127/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A disk brake assembly for braking the rotation of an associated brake rotor comprising a caliper, at least one brake pad associated with said caliper and having a frictional lining adapted to engage the rotor, said caliper defining a fluid motor including a piston, and a mechanical actuator interposed between said piston and said brake pad for transmitting actuating forces from said piston to said brake pad and for mechanically actuating said brake pad, said mechanical actuator comprising relatively movable elements, means for effecting relative movement of said elements, means for exerting an axial force upon said brake pad upon relative movement of said elements, and means including cooperating camming elements interposed between said piston and said brake pad for exerting a selfenergizing force upon said brake pad only when said brake pad is actuated by said mechanical actuator.
Claim 2
Dependent Claim
139 words
A disk brake assembly for braking the rotation of an associated brake rotor comprising a caliper, at least one brake pad associated with said caliper and having a frictional lining adapted to engage the rotor, said caliper defining a fluid motor including a piston, and a mechanical actuator interposed between said piston and said brake pad for transmitting actuating forces from said piston to said brake pad and for mechanically actuating said brake pad, said mechanical actuator comprising relatively movable elements, means for effecting relative movement of said elements, means for exerting an axial force upon said brake pad upon relative movement of said elements, and means including cooperating camming elements interposed between said piston and said brake pad for exerting a selfenergizing force upon said brake pad only when said brake pad is actuated by said mechanical actuator.
Claim 3
Dependent Claim
26 words
A disk brake assembly as set forth in claim 1 further including means for preventing inward movement of the piston upon actuation of the mechanical actuator.
Claim 4
Dependent Claim
41 words
A disk brake assembly as set forth in claim 1 wherein the mechanical actuator comprises annular cam means including a pivotally supported element rotatable about a pivot axis aligned with the axis of the cylinder bore for effecting the relative movement.
Claim 5
Dependent Claim
47 words
A disk brake assembly as set forth in claim 3 wherein the annular cam means includes a plurality of circumferentially spaced balls, the cam means having pockets for receiving said balls and ramps for exerting the axial force upon pivotal movement of the pivotally supported cam element.
Claim 6
Dependent Claim
56 words
A disk brake assembly as set forth in claim 4 wherein the camming elements include a ball element interposed between elements of the mechanical actuator and the brake pad, said actuator elements having inclined surfaces and being supported for relative movement in the direction of rotor rotation for exerting the axial force upon such relative movement.
Claim 7
Dependent Claim
27 words
A disk brake assembly as set forth in claim 5 wherein the ball element is concentrically disposed relative to the axis of rotation of the cam element.
References Cited (Backward Citations)
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US3266602A
Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |