US3837437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ratchet actuated brake wear compensation
Assignee: MR GASKET COMPANY A OH CORP
•
Filing: 1973-01-22
•
Granted: 1974-09-24
•
Expires: 1993-01-22
Abstract
Abstract A pneumatically actuated brake system employs a lever, and means responsive to lever swinging to receive primary force transmission via one portion of the lever for effecting advancement of a brake part into braking engagement with a moving part such as a disc, and to receive auxiliary force transmission from another portion of the lever to displace the brake part toward the disc in compensating relation to the degree of brake part wear, whereby the range of lever swinging may be quite limited.
Inventors
- 👤 S Martins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:48
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/28; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/567; F16D65/568; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/22; F16D2125/28; F16D2125/32; F16D2125/58
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
225 words
For use in a brake assembly operable to advance a brake part into braking engagement with a moving part, and operable to compensate for brake part wear, the combination comprising a. a plunger displaceable to move the brake part against said moving part, b. a lever adapted to be swung in advancement and retraction directions, c. an actuator movable endwise in response to lever swinging in said advancement direction to so displace the plunger, the actuator including a body and a shaft having rotary threaded coupling to the body and also coupled to said plunger, d. means to rotate the shaft relative to the body and in a direction advancing the shaft relatively toward the plunger to compensate for increased wear of the brake part, said means including a rotary element extending in substantially coaxial relation with the shaft, e. said means including interengaged cam shoulders carried by the rotary element and lever to so rotate the shaft in response to said swinging of the lever, said cam shoulder carried by the lever to swing bodily therewith while remaining in engagement with a cam shoulder on the rotary element and also to move relative to the lever in response to lever swinging there being a spring structure relatively urging the cam shoulder on the lever into engagement with a cam shoulder on the rotary element.
Claim 2
Dependent Claim
225 words
For use in a brake assembly operable to advance a brake part into braking engagement with a moving part, and operable to compensate for brake part wear, the combination comprising a. a plunger displaceable to move the brake part against said moving part, b. a lever adapted to be swung in advancement and retraction directions, c. an actuator movable endwise in response to lever swinging in said advancement direction to so displace the plunger, the actuator including a body and a shaft having rotary threaded coupling to the body and also coupled to said plunger, d. means to rotate the shaft relative to the body and in a direction advancing the shaft relatively toward the plunger to compensate for increased wear of the brake part, said means including a rotary element extending in substantially coaxial relation with the shaft, e. said means including interengaged cam shoulders carried by the rotary element and lever to so rotate the shaft in response to said swinging of the lever, said cam shoulder carried by the lever to swing bodily therewith while remaining in engagement with a cam shoulder on the rotary element and also to move relative to the lever in response to lever swinging there being a spring structure relatively urging the cam shoulder on the lever into engagement with a cam shoulder on the rotary element.
Claim 3
Dependent Claim
59 words
The combination of claim 1 wherein said spring structure includes first and second springs respectively urging the cam shoulder on the lever in a first direction generally toward said axis and in a second direction generally normal to said first direction whereby the lever remains swingable in said advancement direction despite inadvertent blockage of rotation of the rotary element.
Claim 4
Dependent Claim
51 words
The combination of claim 1 wherein said rotary element defines multiple helical cam shoulders successively engageable by the cam shoulder on the lever as the brake part wears, the lever having a bifurcated end portion straddling said actuator body and engageable with lug surfaces thereon at opposite sides of said shaft.
Claim 5
Dependent Claim
14 words
The combination of claim 3 wherein said rotary element and shaft have positive intercoupling.
Claim 6
Dependent Claim
45 words
The combination of claim 3 including ratchet structure engaging the rotary element to allow relatively forward rotation thereof in one direction as the lever swings in one direction and to block reverse rotation of the gear as the lever is swung in an opposite direction.
Claim 7
Dependent Claim
31 words
The combination of claim 5 wherein the rotary element has circularly spaced shoulders on one axially end face thereof successively engageable by a yieldably biased arm defined by the ratchet structure.
Claim 8
Dependent Claim
32 words
The combination of claim 5 wherein the rotary element has circularly spaced shoulders presented at the side thereof and successively engageable by a yieldably biased latch dog defined by the ratchet structure.
Claim 9
Dependent Claim
35 words
The combination of claim 1 wherein said rotary element and shaft have releasable intercoupling characterized as operable to allow swinging of the lever in said advancement direction despite inadvertent blockage of rotation of the shaft.
Claim 10
Dependent Claim
53 words
The combination of claim 8 wherein said releasable intercoupling comprises a friction washer extending about the shaft, the rotary element being movable axially relative to the shaft and there being a spring urging the rotary element in a direction to clamp the friction washer against an axially facing shoulder on the rotary element.
Claim 11
Dependent Claim
32 words
The combination of claim 1 including a caliper mounting said actuator to move relative thereto toward and away from said moving part in the form of a disc straddled by the caliper.
Claim 12
Dependent Claim
43 words
The combination of claim 10 including a second actuator and associated plunger and means to rotate the second actuator shaft, as defined, the lever being in the form of a yoke having opposite end portions each of which straddles one of the actuators.
Claim 13
Dependent Claim
57 words
The combination of claim 10 including a grip ring frictionally gripping the plunger to advance therewith and a Belleville spring carried by the caliper to yieldably resist advancement of the grip ring to an extent such that the plunger advances relative to the grip ring overcoming frictional resistance of said ring to compensate for brake part wear.
Claim 14
Dependent Claim
44 words
The combination of claim 1 wherein the lever has a curved cam surface through which force is transmitted to the actuator, there being a correspondingly curved seat carried by the actuator to interfit the lever cam surface for distributing said force over said seat.
Claim 15
Dependent Claim
28 words
The combination of claim 13 wherein the seat is carried by the actuator to be shiftable relative thereto within a predetermined range, and in response to lever pivoting.
References Cited (Backward Citations)
US1554573A
Cited
US2274213A
Cited
US2669327A
Cited
US3121478A
Cited
US3269490A
Cited
US3323618A
Cited
US3371755A
Cited
US3724607A
Cited
US3702125A
Cited
US3727728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |