US3575266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adjusting parking brake
Assignee: Ford Motor Co
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Filing: 1969-07-28
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Granted: 1971-04-20
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Expires: 1989-07-28
Abstract
Abstract A parking-brake-actuating linkage that is automatically adjustable in response to adjustment of the brakeshoes. A cable guide is mounted on one of the shoes near the adjusting screw and tightens the parking brake cable as the brakeshoes are adjusted outwardly.
Inventors
- 👤 Amnon Sitchin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:28
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/16; F16D51/18; F16D51/20; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/561; F16D2125/00; F16D2125/18; F16D2125/58; F16D2125/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A brake assembly having a backing plate and a pair of arcuate brakeshoes movably connected to said backing plate and adapted to be engageable with an annular brake drum rotatably disposed relative to said brakeshoes; said shoes having first and second adjacent ends; anchor means secured to said backing plate interposing said first adjacent ends of said shoes; shoe adjustment means interposing said second adjacent ends extensible to incrementally separate said second ends; brake-actuating means engaging said shoes; connecting means interconnecting said actuating means and a control assembly external to said brake assembly, said actuating means engageable with said brakeshoes to spread said shoes into braking engagement with said brake drum in response to the control assembly; an opening in said backing plate receiving said connecting means; said connecting means between said actuating means and said backing plate opening engaging one of said brakeshoes.
Claim 2
Dependent Claim
144 words
A brake assembly having a backing plate and a pair of arcuate brakeshoes movably connected to said backing plate and adapted to be engageable with an annular brake drum rotatably disposed relative to said brakeshoes; said shoes having first and second adjacent ends; anchor means secured to said backing plate interposing said first adjacent ends of said shoes; shoe adjustment means interposing said second adjacent ends extensible to incrementally separate said second ends; brake-actuating means engaging said shoes; connecting means interconnecting said actuating means and a control assembly external to said brake assembly, said actuating means engageable with said brakeshoes to spread said shoes into braking engagement with said brake drum in response to the control assembly; an opening in said backing plate receiving said connecting means; said connecting means between said actuating means and said backing plate opening engaging one of said brakeshoes.
Claim 3
Dependent Claim
41 words
A brake assembly according to claim 1 and including: said connecting means comprising a cable; guide means mounted to said one shoe and receiving a portion of said cable between said brake actuating means and said opening in said backing plate.
Claim 4
Dependent Claim
53 words
A brake assembly according to claim 2 and including: said brake actuating means comprising a lever means pivotally mounted to anchor pin; cam means secured to said lever and engaging said first adjacent ends of said brake shoes; said cam means spreading said first adjacent ends upon pivotal movement of said lever means.
Claim 5
Dependent Claim
172 words
A brake assembly having a backing plate and primary and secondary arcuate brakeshoes movably connected to said backing plate and adapted to be engageable with an annular brake drum rotatably disposed relative to said brakeshoes; said shoes having first and second adjacent ends; anchor means secured to said backing plate interposing said first adjacent ends of said shoes; shoe adjustment means interposing said second adjacent ends of said brakeshoes and being extensible to incrementally separate said second ends in response to wear of said brakeshoes; cam means pivotally mounted on said anchor pin engaging said first ends of said brakeshoes, lever means secured at one end to said cam means and extending toward said primAry shoe; cable means attached to the other end of said lever means; an opening formed in said backing plate receiving said cable means; cable guide means mounted on said secondary shoe adjacent said second ends; said cable engaging said cable guide means between said other end of said lever means and said opening in said backing plate.
Claim 6
Dependent Claim
172 words
A brake assembly having a backing plate and primary and secondary arcuate brakeshoes movably connected to said backing plate and adapted to be engageable with an annular brake drum rotatably disposed relative to said brakeshoes; said shoes having first and second adjacent ends; anchor means secured to said backing plate interposing said first adjacent ends of said shoes; shoe adjustment means interposing said second adjacent ends of said brakeshoes and being extensible to incrementally separate said second ends in response to wear of said brakeshoes; cam means pivotally mounted on said anchor pin engaging said first ends of said brakeshoes, lever means secured at one end to said cam means and extending toward said primAry shoe; cable means attached to the other end of said lever means; an opening formed in said backing plate receiving said cable means; cable guide means mounted on said secondary shoe adjacent said second ends; said cable engaging said cable guide means between said other end of said lever means and said opening in said backing plate.
Claim 7
Dependent Claim
23 words
A brake assembly according to claim 4 and including said cable guide means comprising a pulley means rotatably mounted on said secondary brakeshoe.
Claim 8
Dependent Claim
23 words
A brake assembly according to claim 4 and including spring means engaging said lever means and biasing said lever toward said primary shoe.
References Cited (Backward Citations)
US2127739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |