US3602064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parking brake control
Assignee: Motors Liquidation Co
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Filing: 1970-03-30
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Granted: 1971-08-31
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Expires: 1990-03-30
Abstract
Abstract A parking brake control mechanism for motor vehicles that maintains braking effort despite relaxation of any of the parking brake system components. A brake lever to which the brake cable is attached is biased in a cable tensioning direction by a torsion spring to provide the antirelaxation mechanism of this invention.
Inventors
- 👤 Philip L Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:55
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/02; B60T7/04; B60T7/045; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/20408; Y10T74/20528; Y10T74/20576; Y10T74/20636; Y10T74/20714; Y10T74/2072
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
105 words
A parking brake force intensifier mechanism comprising: a fixed member; a ratchet lever; an actuating lever, said actuating lever and said ratchet lever pivotally mounted on said fixed member by a pivot pin; a brake lever pivotally mounted on said ratchet lever; a brake cable attached to said brake lever; means biasing said brake lever pivotally relative to said ratchet lever and in brake cable tensioning direction and toward pivotal engagement with said actuating lever, a pawl pivotally attached to said fixed member and engaging said ratchet lever, thereby maintaining a pivotal position of said ratchet lever against tension force exerted through said brake cable.
Claim 2
Dependent Claim
105 words
A parking brake force intensifier mechanism comprising: a fixed member; a ratchet lever; an actuating lever, said actuating lever and said ratchet lever pivotally mounted on said fixed member by a pivot pin; a brake lever pivotally mounted on said ratchet lever; a brake cable attached to said brake lever; means biasing said brake lever pivotally relative to said ratchet lever and in brake cable tensioning direction and toward pivotal engagement with said actuating lever, a pawl pivotally attached to said fixed member and engaging said ratchet lever, thereby maintaining a pivotal position of said ratchet lever against tension force exerted through said brake cable.
Claim 3
Dependent Claim
148 words
The parking brake force intensifier mechanism of claim 1 further characterized by: said ratchet lever having first and second arcuately spaced stop means attached thereto; said actuating lever having an abutment arcuately movable between said stop means, whereby said stop means define limits of rotation of said actuating lever relative to said ratchet lever; said brake lever being pivotally attached intermediate its ends by a pivot pin secured to said ratchet lever, said brake cable being pivotally attached to one end of said brake lever; said biasing means being a torsion spring biasing the other end of said brake lever into pivotal engagement with the abutment of said actuating lever and thereby biasing said actuating lever into engagement with the first stop means on said ratchet lever to define a rest position of the mechanism, said pawl being releasable to permit the mechanism to assume a rest position.
References Cited (Backward Citations)
US3002394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |