US3708044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle expanding brake assembly
Assignee: Aisin Corp
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Filing: 1971-05-18
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Granted: 1973-01-02
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Expires: 1991-05-18
Abstract
Abstract An automotive vehicle brake assembly, comprising a rotatable brake drum, a hydraulic service brake section and an emergency or parking brake section, both of said brake sections when actuated either separately or jointly are arranged to cooperate with a common pair of brake shoes adapted for frictional cooperation with said drum, said assembly being characterized by the provision of at least one mechanical linkage connected between both of said brake sections so as to modify the brake actuating mode of at least one of said brake sections under certain operating conditions.
Inventors
- 👤 T Torri
- 👤 M Nyunoya
- 👤 A Kozakai
- 👤 T Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:51
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/561; F16D65/562; F16D51/00; F16D51/16; F16D51/18; F16D51/20; F16D51/24; F16D51/46; F16D51/48; F16D51/50; F16D65/14; F16D65/16; F16D65/22; F16D65/563
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
348 words
An automotive wheel brake assembly comprising, a stationary backing plate fixedly attached to an axle support means, a first and a second curved brake shoe movably mounted on said backing plate opposite one another, a rotatable brake drum positioned around said brake shoes for frictional engagement therewith, a hydraulic service brake actuator assembly slidably mounted on said backing plate between a first pair of adjacent ends of said first and second brake shoes, said hydraulic actuator assembly including a housing slidably attached to said backing plate and having a bore therein slidably containing a piston, said piston being operatively connected with the first end of said first brake shoe, the first end of said second brake shoe being pivotally attached to said backing plate, a stationary anchor secured to said backing plate between the second pair of adjacent ends of said first and second brake shoes and in abutting relationship therewith, and a mechanical brake shoe expanding means operatively connected with said shoes, said mechanical shoe expanding means comprising a first link means having one end thereof operatively connected with a parking brake applying means, an intermediate portion of said first link means being operatively connected with the second end of said first brake shoe, and the remaining end of said first link means being operatively connected with the second end of said second brake shoe, a second motion transmitting link means having one end thereof operatively connected with the first end of said first brake shoe and the piston of said hydraulic brake actuator assembly and the other end operatively connected with the second end of said first brake shoe and the intermediate portion of said first motion transmitting link means, and a third motion transmitting link means having one end thereof pivotally attached to said backing plate and in operative engagement with said housing of said hydraulic brake actuator assembly, the other end of said third link means being operatively connected with the second end of said second brake shoe, the end of said first motion transmitting means and in operative engagement with said stationary anchor.
Claim 2
Dependent Claim
348 words
An automotive wheel brake assembly comprising, a stationary backing plate fixedly attached to an axle support means, a first and a second curved brake shoe movably mounted on said backing plate opposite one another, a rotatable brake drum positioned around said brake shoes for frictional engagement therewith, a hydraulic service brake actuator assembly slidably mounted on said backing plate between a first pair of adjacent ends of said first and second brake shoes, said hydraulic actuator assembly including a housing slidably attached to said backing plate and having a bore therein slidably containing a piston, said piston being operatively connected with the first end of said first brake shoe, the first end of said second brake shoe being pivotally attached to said backing plate, a stationary anchor secured to said backing plate between the second pair of adjacent ends of said first and second brake shoes and in abutting relationship therewith, and a mechanical brake shoe expanding means operatively connected with said shoes, said mechanical shoe expanding means comprising a first link means having one end thereof operatively connected with a parking brake applying means, an intermediate portion of said first link means being operatively connected with the second end of said first brake shoe, and the remaining end of said first link means being operatively connected with the second end of said second brake shoe, a second motion transmitting link means having one end thereof operatively connected with the first end of said first brake shoe and the piston of said hydraulic brake actuator assembly and the other end operatively connected with the second end of said first brake shoe and the intermediate portion of said first motion transmitting link means, and a third motion transmitting link means having one end thereof pivotally attached to said backing plate and in operative engagement with said housing of said hydraulic brake actuator assembly, the other end of said third link means being operatively connected with the second end of said second brake shoe, the end of said first motion transmitting means and in operative engagement with said stationary anchor.
Claim 3
Dependent Claim
299 words
An automotive wheel brake assembly comprising, a stationary backing plate, a pair of curved brake shoes movably mounted on said backing plate opposite one another, a hydraulic service brake actuating means disposed on said backing plate between one pair of adjacent ends of said brake shoes and operatively connected therewith for expanding said brake shoes, a stationary anchor secured to said backing plate between the remaining pair of adjacent ends of said brake shoes in abutting relationship therewith, a brake drum rotatably positioned around said brake shoes for frictional engagement therewith, and a mechanical brake shoe expanding means operatively connected with said brake shoes, and comprising a mechanical parking brake applying means, a first, a second and a third motion transmitting link means, one end of said mechanical parking brake applying means being operatively connected with one end of one of said brake shoes, one end of said first link means being operatively connected with an intermediate point of said mechanical parking brake applying means, the other end of said first link means being operatively connected with one end of said third link means, one end of said second link means being operatively connected with the other end of said third link means, and the other end of said second link means being operatively connected with the other end of said one of said brake shoes, a first and second lever means pivotably mounted on both ends of the other of said brake shoes and pivotably connected with both ends of said third link means, whereby, in case of simultaneous application of the hydraulic service brake and the mechanical parking brake both braking efforts will be applied to said brake shoes, wherein upon release of the hydraulic service brake application the joint brake application effect will be substantially reserved.
Claim 4
Dependent Claim
299 words
An automotive wheel brake assembly comprising, a stationary backing plate, a pair of curved brake shoes movably mounted on said backing plate opposite one another, a hydraulic service brake actuating means disposed on said backing plate between one pair of adjacent ends of said brake shoes and operatively connected therewith for expanding said brake shoes, a stationary anchor secured to said backing plate between the remaining pair of adjacent ends of said brake shoes in abutting relationship therewith, a brake drum rotatably positioned around said brake shoes for frictional engagement therewith, and a mechanical brake shoe expanding means operatively connected with said brake shoes, and comprising a mechanical parking brake applying means, a first, a second and a third motion transmitting link means, one end of said mechanical parking brake applying means being operatively connected with one end of one of said brake shoes, one end of said first link means being operatively connected with an intermediate point of said mechanical parking brake applying means, the other end of said first link means being operatively connected with one end of said third link means, one end of said second link means being operatively connected with the other end of said third link means, and the other end of said second link means being operatively connected with the other end of said one of said brake shoes, a first and second lever means pivotably mounted on both ends of the other of said brake shoes and pivotably connected with both ends of said third link means, whereby, in case of simultaneous application of the hydraulic service brake and the mechanical parking brake both braking efforts will be applied to said brake shoes, wherein upon release of the hydraulic service brake application the joint brake application effect will be substantially reserved.
Claim 5
Dependent Claim
309 words
An automotive wheel brake assembly comprising, a stationary backing plate, a pair of curved brake shoes movably mounted on said backing plate opposite one another, a hydraulic service brake actuating means disposed on said backing plate between one pair of adjacent ends of said brake shoes and operatively connected therewith for expanding said brake shoes, a stationary anchor secured to said backing plate between the remaining pair of adjacent ends of said brake shoes in abutting relationship therewith, a brake drum rotatably positioned around said brake shoes for frictional engagement therewith, and a mechanical brake shoe expaNding means operatively connected with said brake shoes, said shoe expanding means including a first motion transmitting link means, said first motion transmitting link means having one end thereof operatively connected with an intermediate portion of a mechanical parking brake actuating means, one end thereof operatively connected with the end of one of said brake shoes forming the remaining pair of adjacent ends of said brake shoes, and the other end of said first motion transmitting link means being operatively connected with the end of the other of said pair of brake shoes forming the remaining pair of adjacent ends thereof, a second link means having the ends thereof operatively connected with the ends of said other brake shoe, and a third link means being operatively connected with both of said brake shoes at the ends thereof forming said one pair of adjacent ends, said third link means having an automatic brake clearance adjusting means operatively connected therein for automatically adjusting the length of said third link means, whereby, in case of simultaneous application of the hydraulic service brake and the mechanical parking brake both braking efforts will be applied to said brake shoes, wherein upon release of the hydraulic service brake application of the joint brake application effect will be substantially reserved.
Claim 6
Dependent Claim
309 words
An automotive wheel brake assembly comprising, a stationary backing plate, a pair of curved brake shoes movably mounted on said backing plate opposite one another, a hydraulic service brake actuating means disposed on said backing plate between one pair of adjacent ends of said brake shoes and operatively connected therewith for expanding said brake shoes, a stationary anchor secured to said backing plate between the remaining pair of adjacent ends of said brake shoes in abutting relationship therewith, a brake drum rotatably positioned around said brake shoes for frictional engagement therewith, and a mechanical brake shoe expaNding means operatively connected with said brake shoes, said shoe expanding means including a first motion transmitting link means, said first motion transmitting link means having one end thereof operatively connected with an intermediate portion of a mechanical parking brake actuating means, one end thereof operatively connected with the end of one of said brake shoes forming the remaining pair of adjacent ends of said brake shoes, and the other end of said first motion transmitting link means being operatively connected with the end of the other of said pair of brake shoes forming the remaining pair of adjacent ends thereof, a second link means having the ends thereof operatively connected with the ends of said other brake shoe, and a third link means being operatively connected with both of said brake shoes at the ends thereof forming said one pair of adjacent ends, said third link means having an automatic brake clearance adjusting means operatively connected therein for automatically adjusting the length of said third link means, whereby, in case of simultaneous application of the hydraulic service brake and the mechanical parking brake both braking efforts will be applied to said brake shoes, wherein upon release of the hydraulic service brake application of the joint brake application effect will be substantially reserved.
Claim 7
Dependent Claim
46 words
A wheel brake assembly as claimed in claim 3, wherein said hydraulic service brake actuator means is slidably mounted on said backing plate, said hydraulic service brake actuator means forming said third motion transmitting link means between one pair of adjacent ends of said brake shoes.
Claim 8
Dependent Claim
334 words
An automotive wheel brake assembly comprising, a stationary backing plate attached to an axle support means, a first and second brake shoe movably disposed on said backing plate opposite one another, a first hydraulic service brake actuator assembly disposed on said backing plate between two adjacent first ends of said brake shoes, said actuator assembly including a housing having a bore therein with a piston slidably mounted in said bore, said housing being fixedly secured to said backing plate, said piston being operatively connected with the first end of the first brake shoe and the actuator housing being in abutting relationship with the first end of the second brake shoe to serve as an anchor therefor, a second hydraulic service brake actuator assembly disposed on said backing plate between two adjacent second ends of said brake shoes, said second brake actuator assembly including a housing having a bore therein with a piston being slidably mounted in said bore, said second actuator housing being fixedly mounted on said backing plate and in abutting relationship with the second end of the first brake shoe, said piston of said second actuator assembly being operatively connected with the second end of said second brake shoe, a brake drum rotatably positioned around said brake shoes for frictional engagement therewith, and a mechanical brake shoe actuating means including a first and a second motion transmitting link means, said first link means having one end thereof operatively connected with an intermediate point of a mechanical parking brake applying means, and the remaining end of said first link means being operatively connected with the second end of said second brake shoe, said second link means having one end thereof being operatively connected with the first end of said first brake shoe and with the piston of said first hydraulic actuator assembly, the remaining end of said second link means being operatively connected with the second end of said first brake shoe and with one end of said mechanical parking brake applying means.
Claim 9
Dependent Claim
334 words
An automotive wheel brake assembly comprising, a stationary backing plate attached to an axle support means, a first and second brake shoe movably disposed on said backing plate opposite one another, a first hydraulic service brake actuator assembly disposed on said backing plate between two adjacent first ends of said brake shoes, said actuator assembly including a housing having a bore therein with a piston slidably mounted in said bore, said housing being fixedly secured to said backing plate, said piston being operatively connected with the first end of the first brake shoe and the actuator housing being in abutting relationship with the first end of the second brake shoe to serve as an anchor therefor, a second hydraulic service brake actuator assembly disposed on said backing plate between two adjacent second ends of said brake shoes, said second brake actuator assembly including a housing having a bore therein with a piston being slidably mounted in said bore, said second actuator housing being fixedly mounted on said backing plate and in abutting relationship with the second end of the first brake shoe, said piston of said second actuator assembly being operatively connected with the second end of said second brake shoe, a brake drum rotatably positioned around said brake shoes for frictional engagement therewith, and a mechanical brake shoe actuating means including a first and a second motion transmitting link means, said first link means having one end thereof operatively connected with an intermediate point of a mechanical parking brake applying means, and the remaining end of said first link means being operatively connected with the second end of said second brake shoe, said second link means having one end thereof being operatively connected with the first end of said first brake shoe and with the piston of said first hydraulic actuator assembly, the remaining end of said second link means being operatively connected with the second end of said first brake shoe and with one end of said mechanical parking brake applying means.
Claim 10
Dependent Claim
78 words
An automotive wheel brake assembly as claimed in claim 5, wherein said mechanical shoe expanding means further comprises, a third link means having one end thereof operatively connected with the second end of said second brake shoe and the remaining end of said first motion transmitting means, the other end of said Third link means being operatively connected with the first end of said second brake shoe and with the stationary housing of said first hydraulic actuator assembly.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |