US3917040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission controlled vehicle brake
Assignee: Massey Ferguson Inc
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Filing: 1973-05-18
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Granted: 1975-11-04
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Expires: 1993-05-18
Abstract
Abstract A braking system for vehicles to prevent rearward movement of the vehicles without action by the driver when the vehicle is not being driven rearwardly, particularly useful on vehicles having loads applied to them in the rearward direction, includes a linkage operatively associated with a brake, which linkage is responsive to reverse motion of the vehicles, to cause engagement of the linkage and energization of the brake to prevent rearward movement of the vehicles. Control means, such as a clutch, responsive to rearward movement of the vehicle may be used to selectively energize and de-energize the brake.
Inventors
- 👤 Stanley L Radcliffe
- 👤 Arthur E Dornan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:08
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12; B60T7/122
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
256 words
In a vehicle having a transmission and a drive member for transmitting power to ground engaging members from an engine for driving the vehicle relative to the ground, a braking system comprising, means for interrupting movement of the drive member mounted on the drive member; a linkage operatively associated with said interrupting means, a member of said linkage supported by the drive member so as to be rotatable over a portion of the 360* rotation of the drive member in response to reverse motion of the drive member corresponding to reverse motion of the vehicle, said linkage including a link and a pivotal arm, two ends on said pivotal arm with one end of said pivotal arm being pivotally connected to said linkage and to said link at spaced locations, said link limiting the rotational movement of said linkage member; means for operatively engaging said linkage, having at least a portion thereof stationary for engaging said link, to cause said linkage to energize said interrupting means preventing further movement of the drive member; means for shifting the transmission; means for actuating said linkage attached to the other end of said pivotal arm; means for controlling said system including a first control element and a second control element responsive to reverse motion of the drive member; a second linkage between Said shifting means and said control means attached to said first control element to position said element, said second control element directing the flow of energy to said actuating means upon reverse motion of the drive member.
Claim 2
Dependent Claim
256 words
In a vehicle having a transmission and a drive member for transmitting power to ground engaging members from an engine for driving the vehicle relative to the ground, a braking system comprising, means for interrupting movement of the drive member mounted on the drive member; a linkage operatively associated with said interrupting means, a member of said linkage supported by the drive member so as to be rotatable over a portion of the 360* rotation of the drive member in response to reverse motion of the drive member corresponding to reverse motion of the vehicle, said linkage including a link and a pivotal arm, two ends on said pivotal arm with one end of said pivotal arm being pivotally connected to said linkage and to said link at spaced locations, said link limiting the rotational movement of said linkage member; means for operatively engaging said linkage, having at least a portion thereof stationary for engaging said link, to cause said linkage to energize said interrupting means preventing further movement of the drive member; means for shifting the transmission; means for actuating said linkage attached to the other end of said pivotal arm; means for controlling said system including a first control element and a second control element responsive to reverse motion of the drive member; a second linkage between Said shifting means and said control means attached to said first control element to position said element, said second control element directing the flow of energy to said actuating means upon reverse motion of the drive member.
Claim 3
Dependent Claim
29 words
The system defined in claim 1 wherein said control means includes means for positioning said second control element, said positioning means being movable by reverse movement of the vehicle.
Claim 4
Dependent Claim
28 words
The system defined in claim 1 wherein said actuating means 15 energized by said second control element upon proper positioning of said control element by said positioning means.
Claim 5
Dependent Claim
56 words
The system defined in claim 2 wherein said positioning means includes first and second members having frictional engagement therebetween, said second member being movable by movement of the vehicle and said first member being attached to at least a portion of said control means and positioned by the frictional force between said first and second members.
Claim 6
Dependent Claim
20 words
The system defined in claim 4 including means for biasing said first and second members into contact with each other.
Claim 7
Dependent Claim
19 words
The system defined in claim 4 including means for biasing said second member into contact with said first member.
Claim 8
Dependent Claim
46 words
The system defined in claim 4 wherein said second member comprises two concentric rings affixed relative to one another and a plurality of segments between said rings equally spaced over the annulus therebetween, said first member being located between said segments and one of said rings.
Claim 9
Dependent Claim
34 words
The system defined in claim 4 wherein said first member comprises a ring assembly and said second member comprises a hub assembly attached to said drive member, said ring assembly encompassing said hub assembly.
Claim 10
Dependent Claim
192 words
In a vehicle having a transmission, a drive member for transmitting power to ground engaging members from an engine for driving the vehicle relative to the ground and a brake, a braking system comprising: means for interrupting movement of the drive member mounted on the drive member; means for shifting the transmission; a first linkage operatively associated with said interrupting means, a member of said linkage supported by the drive member so as to be rotatable over a portion of the 360* rotation of the drive member in response to reverse motion of the drive member corresponding to reverse motion of the vehicle; means for actuating said first linkage attached to said first linkage; a first control valve; a second control valve responsive to reverse motion of the drive member; a second linkage connecting said shifting means and said first control valve to position said first valve to actuate and release said actuating means, said second control valve mounted on the brake for normally directing flow from said first control valve to sump and for directing flow to said actuating means upon reverse motion of the drive member connected to said valve.
Claim 11
Dependent Claim
192 words
In a vehicle having a transmission, a drive member for transmitting power to ground engaging members from an engine for driving the vehicle relative to the ground and a brake, a braking system comprising: means for interrupting movement of the drive member mounted on the drive member; means for shifting the transmission; a first linkage operatively associated with said interrupting means, a member of said linkage supported by the drive member so as to be rotatable over a portion of the 360* rotation of the drive member in response to reverse motion of the drive member corresponding to reverse motion of the vehicle; means for actuating said first linkage attached to said first linkage; a first control valve; a second control valve responsive to reverse motion of the drive member; a second linkage connecting said shifting means and said first control valve to position said first valve to actuate and release said actuating means, said second control valve mounted on the brake for normally directing flow from said first control valve to sump and for directing flow to said actuating means upon reverse motion of the drive member connected to said valve.
References Cited (Backward Citations)
US1967698A
Cited
US1875865A
Cited
US1977588A
Cited
US2115364A
Cited
US2381755A
Cited
US2726556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |