US3729074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parking brake control with transmission interlock
Assignee: Caterpillar Inc
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Filing: 1971-06-14
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Granted: 1973-04-24
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Expires: 1991-06-14
Abstract
Abstract A control system for a vehicle having a parking brake and a transmission is provided with means cooperating with the transmission controls to bias the transmission into a neutral condition when the parking brake is applied. The cooperating control means coact to shift the transmission to a neutral position if the parking brake is applied with the transmission in either a forward or reverse drive condition. A resilient biasing means is employed to provide a manual override to enable the transmission to be manually held in an operating condition with the parking brake engaged.
Inventors
- 👤 R Anderson
- 👤 R Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:47
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/005; B60T1/02; B60T1/06; B60T1/062; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20213
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A control system for operatively interconnecting a parking brake control having an actuated position and a release position, and a transmission control shiftable between a neutral, and forward and reverse drive positions; said control system comprising: a brake actuating control lever; a transmission shift member; means operatively connected to said brake control lever and operative when said brake control lever is in said actuated position to force said shift lever to a neutral position; said means to force said shift member comPrises camming means including camming surfaces defined by a substantially V-shaped notch carried on a lever mounted adjacent to said shift member for operative engagement with an arm extending from said shift member into the space between said camming surfaces; resilient means connecting said brake control lever to said cam lever; said resilient means comprises a flexible cable, and, a compression spring mounted on said cable between a stop at the end thereof and said lever so that said resilient means functions as a lost motion connection.
Claim 2
Dependent Claim
168 words
A control system for operatively interconnecting a parking brake control having an actuated position and a release position, and a transmission control shiftable between a neutral, and forward and reverse drive positions; said control system comprising: a brake actuating control lever; a transmission shift member; means operatively connected to said brake control lever and operative when said brake control lever is in said actuated position to force said shift lever to a neutral position; said means to force said shift member comPrises camming means including camming surfaces defined by a substantially V-shaped notch carried on a lever mounted adjacent to said shift member for operative engagement with an arm extending from said shift member into the space between said camming surfaces; resilient means connecting said brake control lever to said cam lever; said resilient means comprises a flexible cable, and, a compression spring mounted on said cable between a stop at the end thereof and said lever so that said resilient means functions as a lost motion connection.
Claim 3
Dependent Claim
127 words
A control system for operatively interconnecting a parking brake control having an actuated position and a release position, and a transmission control shiftable between a neutral, and forward and reverse drive positions; said control system comprising: a brake actuating control lever; a transmission shift member; means operatively connected to said brake control lever and operative when said brake control lever is in said actuated position to force said shift lever to a neutral position; said means comprising cam means carried on a pivotal arm; a resilient cable including a compression spring mounted on the end of said cable between a stop member and said pivotal arm connecting said control lever to said arm; and, an arm extending from said shift member for engagement with said cam means.
Claim 4
Dependent Claim
127 words
A control system for operatively interconnecting a parking brake control having an actuated position and a release position, and a transmission control shiftable between a neutral, and forward and reverse drive positions; said control system comprising: a brake actuating control lever; a transmission shift member; means operatively connected to said brake control lever and operative when said brake control lever is in said actuated position to force said shift lever to a neutral position; said means comprising cam means carried on a pivotal arm; a resilient cable including a compression spring mounted on the end of said cable between a stop member and said pivotal arm connecting said control lever to said arm; and, an arm extending from said shift member for engagement with said cam means.
References Cited (Backward Citations)
US1999284A
Cited
US2964135A
Cited
US3349860A
Cited
US3390523A
Cited
US3498425A
Cited
US3539040A
Cited
US3618718A
Cited
US3645368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |