Patent US3746133A successfully refreshed from Google Patents.
US3746133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for taking up wear for a disc brake and a brake including said device
Assignee: Pont a Mousson SA
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Filing: 1972-06-09
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Granted: 1973-07-17
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Expires: 1992-06-09
Abstract
Abstract This device for automatically taking up wear for a brake having a disc and a brake pad caliper controlled hydraulically and/or mechanically is of the type having a screw, a nut and a piston exerting a pressure on the screw. A ring having oblique teeth and slidably keyed on the screw meshes with a radial finger member. When braking the ring advances with the screw. When the braking ceases, the screw moves back immediately but as the ring is axially movable, it only moves back under the effect of springloaded finger members when the screw and nut system is no longer under load and then rotates, if necessary, the screw with respect to the nut. Any risk of jamming of the device taking up wear is avoided and the wear is taken up irrespective of the control means employed, namely hydraulic or mechanical.
Inventors
- 👤 J Hauth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:23
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/04; F16D65/092; F16D65/095; F16D65/097; F16D65/0973; F16D65/0974; F16D65/0977; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/567; F16D55/00; F16D2055/0004; F16D2055/0016; F16D2055/002; F16D2055/007; F16D2055/0075; F16D2055/0091; F16D2121/00; F16D2121/02; F16D2121/14; F16D2123/00; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/36; F16D2125/40; F16D2125/58
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
217 words
A device for taking up wear of brake pad means of a disc brake and adapted to be interposed between the brake pad means and thrust means for urging the brake pad means against the disc of the brake, said device comprising means defining a body, a system having a longitudinal axis and movable longitudinally relative to the body and comprising a first element in the form of a screw and a second element in the form of a nut coaxial with and screwthreadedly engaged with the screw, one of said elements being rotatable about said axis relative to the body, means for preventing rotation of the other of said elements relative to the body, a ring concentric with the rotatable element, means for keying the ring to the rotatable element so that the ring is slidable relative to the rotatable element along said axis, first resiliently yieldable means for biasing the ring axially against the rotatable element, the rotatable element having an outer peripheral portion having teeth which are parallel to each other and oblique relative to radial axial planes of the ring, a finger member mounted in the body for movement radially of the ring and in engaging relation to the teeth, and second resiliently yieldable means for biasing the finger member against the teeth.
Claim 2
Independent Claim
217 words
A device for taking up wear of brake pad means of a disc brake and adapted to be interposed between the brake pad means and thrust means for urging the brake pad means against the disc of the brake, said device comprising means defining a body, a system having a longitudinal axis and movable longitudinally relative to the body and comprising a first element in the form of a screw and a second element in the form of a nut coaxial with and screwthreadedly engaged with the screw, one of said elements being rotatable about said axis relative to the body, means for preventing rotation of the other of said elements relative to the body, a ring concentric with the rotatable element, means for keying the ring to the rotatable element so that the ring is slidable relative to the rotatable element along said axis, first resiliently yieldable means for biasing the ring axially against the rotatable element, the rotatable element having an outer peripheral portion having teeth which are parallel to each other and oblique relative to radial axial planes of the ring, a finger member mounted in the body for movement radially of the ring and in engaging relation to the teeth, and second resiliently yieldable means for biasing the finger member against the teeth.
Claim 3
Dependent Claim
56 words
A device as claimed in claim 1, wherein said means keying the ring to the rotatable element comprise axially extending studs integral with the rotatable element and apertures in the ring into which apertures the studs extend, the rotatable element having a shoulder against which shoulder the ring is biased by the first resiently yieldable means.
Claim 4
Dependent Claim
27 words
A device as claimed in claim 1, wherein the first resiliently yieldable means comprise axially extending finger members and springs biasing the finger members against the ring.
Claim 5
Dependent Claim
227 words
A disc brake comprising a disc, a caliper, brake pad means, thrust means for urging the brake pad means against the disc, and a device means for taking up wear of the brake pad means interposed Between the brake pad means and the thrust means, said device comprising means defining a body combined with the caliper, a system having a longitudinal axis and movable longitudinally relative to the body and comprising a first element in the form of a screw and a second element in the form of a nut coaxial with and screwthreadedly engaged with the screw, one of said elements being rotatable about said axis relative to the body, means for preventing rotation of the other of said elements relative to the body, a ring concentric with the rotatable element, means for keying the ring to the rotatable element so that the ring is slidable relative to the rotatable element along said axis, first resiliently yieldable means for biasing the ring axially against the rotatable element, the rotatable element having an outer peripheral portion having teeth which are parallel to each other and oblique relative to radial axial planes of the ring, a finger member mounted in the body for movement radially of the ring and in engaging relation to the teeth, and second resiliently yieldable means for biasing the finger member against the teeth.
Claim 6
Dependent Claim
227 words
A disc brake comprising a disc, a caliper, brake pad means, thrust means for urging the brake pad means against the disc, and a device means for taking up wear of the brake pad means interposed Between the brake pad means and the thrust means, said device comprising means defining a body combined with the caliper, a system having a longitudinal axis and movable longitudinally relative to the body and comprising a first element in the form of a screw and a second element in the form of a nut coaxial with and screwthreadedly engaged with the screw, one of said elements being rotatable about said axis relative to the body, means for preventing rotation of the other of said elements relative to the body, a ring concentric with the rotatable element, means for keying the ring to the rotatable element so that the ring is slidable relative to the rotatable element along said axis, first resiliently yieldable means for biasing the ring axially against the rotatable element, the rotatable element having an outer peripheral portion having teeth which are parallel to each other and oblique relative to radial axial planes of the ring, a finger member mounted in the body for movement radially of the ring and in engaging relation to the teeth, and second resiliently yieldable means for biasing the finger member against the teeth.
Claim 7
Dependent Claim
53 words
A disc brake as claimed in claim 4, comprising hydraulic means for applying the brake, the hydraulic means comprising means defining a cylinder combined with the caliper, a floating piston engaging the rotatable element, and a fluid inlet communicating with the cylinder on the opposite side of the piston to the rotatable element.
Claim 8
Dependent Claim
25 words
A disc brake as claimed in claim 5, further comprising a mechanical control means combined with the caliper and capable of shifting the floating piston.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |