US3802200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic master cylinder
Assignee: ZF Active Safety US Inc
•
Filing: 1972-03-27
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Granted: 1974-04-09
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Expires: 1992-03-27
Abstract
Abstract A corrosion resistant, hand operated, hydraulic master cylinder that is particularly adapted for use on motorcycles, bicycles or other similar vehicles. Substantially all of the parts are formed from molded plastics preferably acetal resins. A pivotally supported lever operates the brake and the pivot pin for the lever serves the additional function of holding substantially all of the components together. An improved shock resistant mounting is also incorporated for mounting the master cylinder assembly on the handlebars of the associated vehicle.
Inventors
- 👤 R Kolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:36
CPC Classifications
F; F15; F15B; F15B7/00; F15B7/06; F15B7/08; B; B62; B62L; B62L3/00; B62L3/02; B62L3/023
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
A master cylinder for a brake system or the like comprising a housing defining a bore opening through one end thereof, a piston slidably supported within said bore and defining a fluid chamber therewith, said piston having a portion adapted to protrude from the open end of said bore, said housing defining a pressure outlet in communication with said chamber for receiving fluid pressurized by the movement of said piston within said bore, an operating lever, means carried by said housing adjacent the open end of said bore for supporting said lever for pivotal movement about an axis transversely disposed relative to said bore and offset therefrom, said lever having a portion engaged with said piston for reciprocating said piston, and said lever and said housing each having integral cooperating parts adapted to abut to form a stop which forms the sole means for retaining said piston within said bore.
Claim 2
Dependent Claim
150 words
A master cylinder for a brake system or the like comprising a housing defining a bore opening through one end thereof, a piston slidably supported within said bore and defining a fluid chamber therewith, said piston having a portion adapted to protrude from the open end of said bore, said housing defining a pressure outlet in communication with said chamber for receiving fluid pressurized by the movement of said piston within said bore, an operating lever, means carried by said housing adjacent the open end of said bore for supporting said lever for pivotal movement about an axis transversely disposed relative to said bore and offset therefrom, said lever having a portion engaged with said piston for reciprocating said piston, and said lever and said housing each having integral cooperating parts adapted to abut to form a stop which forms the sole means for retaining said piston within said bore.
Claim 3
Dependent Claim
25 words
A master cylinder as set forth in claim 1 further including a reservoir integrally connected to the housing and in fluid communication with said bore.
Claim 4
Dependent Claim
36 words
A master cylinder as set forth in claim 2 wherein the housing defines a bifurcated portion adjacent the open end of the bore, said operating lever being pivotally supported by said bifurcated portion and extending therebetween.
Claim 5
Dependent Claim
60 words
A master cylinder as set forth in claim 1 further including a clamp piece detachably affixed to the housing, said clamp piece and said housing defining a cavity adapted to pass a handlebar or the like of an associated vehicle with a clearance, and resilient bushing interposed between said cavity and the handlebar for shock mounting the master cylinder thereupon.
Claim 6
Dependent Claim
36 words
A master cylinder as set forth in claim 1 wherein the housing defines a bifurcated portion adjacent the open end of the bore, said operating lever being pivotally supported by said bifurcated portion and extending therebetween.
Claim 7
Dependent Claim
20 words
A master cylinder as set forth in claim 1 wherein the housing is formed from a non-metallic corrosive resistant material.
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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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |