US3768601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc brake and adjusting device therefor
Assignee: DBA SA
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Filing: 1972-01-10
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Granted: 1973-10-30
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Expires: 1992-01-10
Abstract
Abstract A caliper disc brake assembly includes an adjuster mechanism for maintaining the proper clearance between the brake shoes and the disc. The adjuster comprises two interconnecting elements and a member to permit one element to follow the movement of the piston in the brake actuating mechanism. A hollow ring filled with a compressible material such as pressurized gas is effective to retard or momentarily stop the movable element in the adjuster. Over-adjustment due to ''''panic stops'''' is thereby prevented.
Inventors
- 👤 P Bejot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:20
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/18; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/567; F16D2121/00; F16D2121/02; F16D2121/14; F16D2123/00; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/22; F16D2125/26; Y; Y10; Y10S; Y10S188/00; Y10S188/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
251 words
In a disc brake: a rotor having a pair of friction faces; a pair of friction elements, one of said friction elements being disposed adjacent each of said friction faces; a fixed support; a caliper slidably mounted on said fixed support and straddling said rotor to engage each of said friction elements to urge the latter into braking engagement with their corresponding friction faces upon actuation of the caliper when a brake application is effected; said caliper including a housing defining a bore therewithin, a piston slidably mounted in said bore, means for communicating fluid pressure into said bore when a brake application is effected to urge said piston toward the rotor to thereby actuate said caliper; adjuster means carried in said bore to engage said piston upon retraction of the latter when the brake is released to limit retraction of the piston to a predetermined amount, means carried by said piston and normally separated from operative engagement with said adjuster means by a predetermined distance, said means carried by said piston urging said adjuster means toward said rotor after movement of the piston toward the rotor in excess of the predetermined distance, and compressible resilient means disposed between the adjuster means and the means carried by the piston, said resilient means being compressible in response to the fluid pressure level in said bore to thereby increase the predetermined distance through which said piston must travel to bring the means carried by said piston into operative engagement with said adjuster means.
Claim 2
Dependent Claim
251 words
In a disc brake: a rotor having a pair of friction faces; a pair of friction elements, one of said friction elements being disposed adjacent each of said friction faces; a fixed support; a caliper slidably mounted on said fixed support and straddling said rotor to engage each of said friction elements to urge the latter into braking engagement with their corresponding friction faces upon actuation of the caliper when a brake application is effected; said caliper including a housing defining a bore therewithin, a piston slidably mounted in said bore, means for communicating fluid pressure into said bore when a brake application is effected to urge said piston toward the rotor to thereby actuate said caliper; adjuster means carried in said bore to engage said piston upon retraction of the latter when the brake is released to limit retraction of the piston to a predetermined amount, means carried by said piston and normally separated from operative engagement with said adjuster means by a predetermined distance, said means carried by said piston urging said adjuster means toward said rotor after movement of the piston toward the rotor in excess of the predetermined distance, and compressible resilient means disposed between the adjuster means and the means carried by the piston, said resilient means being compressible in response to the fluid pressure level in said bore to thereby increase the predetermined distance through which said piston must travel to bring the means carried by said piston into operative engagement with said adjuster means.
Claim 3
Dependent Claim
42 words
The invention of claim 1; and a threaded post mounted within said bore, said adjuster means being threadedly connected to said post and responsive to the urging of the means carried by said piston to advance on said post toward the rotor.
Claim 4
Dependent Claim
16 words
The invention of claim 2: said resilient means being contained within an annular, thin-metal resilient envelope.
Claim 5
Dependent Claim
13 words
The invention of claim 3, wherein said annular envelope contains a comressible liquid.
Claim 6
Dependent Claim
22 words
The invention of claim 4, wherein said annular envelope is shaped to resiliently yield above a predetermined level of said fluid pressure.
Claim 7
Dependent Claim
12 words
The invention of claim 3, wherein said annular envelope contains pressurized gas.
Claim 8
Dependent Claim
21 words
The invention of claim 6, wherein said annular envelope is shaped to resiliently yield above predetermined level of said fluid pressure.
Claim 9
Dependent Claim
27 words
The invention of claim 7, wherein said annular envelope is substantiallY elliptic in cross-section and has circular ridges formed on its opposite sides to define wavy surfaces.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |