US3828896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake adjuster
Assignee: Individual
•
Filing: 1973-01-18
•
Granted: 1974-08-13
•
Expires: 1993-01-18
Abstract
Abstract A brake adjuster for adjusting spacing of brake shoes of an automobile brake assembly which includes an adjusting cylinder secured to the brake drum between adjacent ends of the brake shoes opposite the brake cylinder ends thereof, the adjustment cylinder having a cylindrical bore from opposite ends of which project a pair of pistons for engaging the brake shoes. A grease nipple is fitted to adjusting cylinder between the pistons through which a lubricating grease can be injected to move the pistons apart and move the brake shoes into engagement with the drum. The grease nipple is fitted with a screw-type closure valve for closing the grease nipple when the brake shoes are suitably adjusted.
Inventors
- 👤 T Paimen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:09
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
In combination with an automotive brake having a stationary backing plate, a rotatable brake drum, a pair of brake shoes mounted on the backing plate for expansive movement, and operating means connected to a pair of adjacent ends of the brake shoes for selectively controlling expansive and retractive movement of the brake shoes, a brake adjuster for adjustably positioning the opposite ends of the brake shoes including a. a cylinder having an axial bore secured to the backing plate, b. a pair of pistons slidably mounted in the bore and having outer ends engaging said opposite ends of the brake shoes, c. a passage through the cylinder ported at its inner end into the bore between the pistons, d. valve means having a grease nipple for receiving a discharge end of a grease gun mounted in the passage of each cylinder being openable to enable lubricating grease to be injected into each cylinder individually so as to spread the pistons of each cylinder apart and closable to lock the pistons against relative movement in the cylinder bore.
Claim 2
Dependent Claim
177 words
In combination with an automotive brake having a stationary backing plate, a rotatable brake drum, a pair of brake shoes mounted on the backing plate for expansive movement, and operating means connected to a pair of adjacent ends of the brake shoes for selectively controlling expansive and retractive movement of the brake shoes, a brake adjuster for adjustably positioning the opposite ends of the brake shoes including a. a cylinder having an axial bore secured to the backing plate, b. a pair of pistons slidably mounted in the bore and having outer ends engaging said opposite ends of the brake shoes, c. a passage through the cylinder ported at its inner end into the bore between the pistons, d. valve means having a grease nipple for receiving a discharge end of a grease gun mounted in the passage of each cylinder being openable to enable lubricating grease to be injected into each cylinder individually so as to spread the pistons of each cylinder apart and closable to lock the pistons against relative movement in the cylinder bore.
Claim 3
Dependent Claim
89 words
A brake adjuster as claimed in claim 1 in which the valve means includes: a. a sleeve having a central passage opening at one end into the cylinder between the pistons and opening at its other end into a conical seat, b. a valve element threaded into the passage for movement into sealing engagement with the conical seat, the valve element having an axial lubricant passage opening at one end short of the inner end of the valve element and opening at the outer end through the grease nipple.
Claim 4
Dependent Claim
30 words
A brake adjuster as claimed in claim 1 including a tension spring connecting said opposite ends of the brake shoes for maintaining the brake shoes in contact with the pistons.
Claim 5
Dependent Claim
20 words
A brake adjuster as claimed in claim 1 in which the inner ends of the pistons are spherical in shape.
Claim 6
Dependent Claim
27 words
A brake adjuster as claimed in claim 1 including O-rings located in spaced pairs adjacent opposite ends of the cylinder for effecting sealing engagement with the pistons.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |