Patent US3601230A successfully refreshed from Google Patents.
US3601230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parking brake for a vehicle driveline
Assignee: Ford Motor Co
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Filing: 1970-07-01
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Granted: 1971-08-24
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Expires: 1990-07-01
Abstract
Abstract A parking brake for an automatic power transmission in an automotive vehicle driveline comprising a personally operable brake lever adapted for oscillation in the transmission housing about an axis that is disposed transversely with respect to the axis rotation of the torque output shaft, a brake pawl pivoted on the transmission housing, a cam rod adapted to be moved into engagement with the pawl to effect application of the brake, a linkage connection between the brake lever and the cam rod and an overload spring means for maintaining the brake lever and the cam rod in assembled relationship.
Inventors
- 👤 Edward F Platz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:50
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/34; F16H63/3416; B; B60; B60T; B60T1/00; B60T1/005; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
255 words
A parking brake structure for a power transmission mechanism having a driven shaft, a parking gear with peripheral teeth carried by said driven shaft for rotation about the axis of said driven shaft, a parking pawl pivoted for oscillation on a stationary portion of said mechanism about an axis parallel to the axis of said parking gear, a cam rod extending generally parallel to the direction of the axis of said driven shaft, a cam element carried by said cam rod and adapted to engage said pawl as said rod is shifted transversely with respect to the plane of oscillation of said pawl, a reaction element carried by said stationary portion in the path of movement of said cam element whereby reaction forces acting on said cam element are transmitted to said stationary portion, a manually operated lever pivotally mounted on said stationary portion, a shaft journaled for rotation on said stationary portion and connected directly to said lever, means for manually rotating said shaft to effect brake engagement and disengagement, said lever including an arm having a lost motion slot formed therein, one end of said cam rod being mounted for oscillation in a plane generally parallel to the plane of oscillation of said lever, a bracket pivoted in said one rod end, and a spring surrounding said shaft with one end thereof anchored on said lever, the other end of said spring being engaged by said pivoted bracket and held fast thereby thus holding said cam rod and said lever in assembled relationship.
Claim 2
Dependent Claim
255 words
A parking brake structure for a power transmission mechanism having a driven shaft, a parking gear with peripheral teeth carried by said driven shaft for rotation about the axis of said driven shaft, a parking pawl pivoted for oscillation on a stationary portion of said mechanism about an axis parallel to the axis of said parking gear, a cam rod extending generally parallel to the direction of the axis of said driven shaft, a cam element carried by said cam rod and adapted to engage said pawl as said rod is shifted transversely with respect to the plane of oscillation of said pawl, a reaction element carried by said stationary portion in the path of movement of said cam element whereby reaction forces acting on said cam element are transmitted to said stationary portion, a manually operated lever pivotally mounted on said stationary portion, a shaft journaled for rotation on said stationary portion and connected directly to said lever, means for manually rotating said shaft to effect brake engagement and disengagement, said lever including an arm having a lost motion slot formed therein, one end of said cam rod being mounted for oscillation in a plane generally parallel to the plane of oscillation of said lever, a bracket pivoted in said one rod end, and a spring surrounding said shaft with one end thereof anchored on said lever, the other end of said spring being engaged by said pivoted bracket and held fast thereby thus holding said cam rod and said lever in assembled relationship.
Claim 3
Dependent Claim
73 words
The combination set forth in claim 1 wherein said spring includes an intermediate portion surrounding said shaft, said one end of rail spring engaging said lever and adapted to apply a torque to said lever in one direction, the other end of said spring being adapted to apply a force on said bracket which, when transmitted through said cam rod to said lever, creates a torque on said lever in the opposite direction.
Claim 4
Dependent Claim
70 words
The combination set forth in claim 1 wherein said one cam rod end is adapted to move within said slot when said lever is moved to a brake engaging position when said pawl tooth is out of registry with respect to the tooth spaces on the periphery of said parking gear, the relative motion that occurs between said cam rod and said lever being accompanied by yielding of said spring.
Claim 5
Dependent Claim
70 words
The combination set forth in claim 2 wherein said one cam rod end is adapted to move within said slot when said lever is moved to a brake engaging position when said pawl tooth is out of registry with respect to the tooth spaces on the periphery of said parking gear, the relative motion that occurs between said cam rod and said lever being accompanied by yielding of said spring.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |