US3119477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic parking brake release system
Assignee: Stewart Warner Corp
•
Filing: 1960-04-18
•
Granted: 1964-01-28
•
Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 Frank A Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:19
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12; B60T7/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN COMBINATION WITH AN AUTOMOTIVE VEHICLE HAVING AN ENGINE WHICH CREATES A PRESSURE SOURCE DIFFERENT FROM AMBIENT WHEN RUNNING, A TRANSMISSION SELECTION MECHANISM, A FOOT PEDAL WHICH IS OPERATED UPON INTENDED MOVEMENT OF THE VEHICLE, AND A SETTABLE PARKING BRAKE HAVING A RELEASE MEANS WHEN ACTUATED EFFECTIVE TO RELEASE THE SET BRAKE, AN IMPROVED APPARATUS FOR AUTOMATICALLY RELEASING THE PARKING BRAKE UPON THE SIMULTANEOUS OCCURRENCE OF GIVEN CONDITIONS INDICATIVE OF INTENDED ACTUAL MOVEMENT OF THE VEHICLE, THE APPARATUS COMPRISING; A FLUID PRESSURE OPERATED BRAKE RELEASING MECHANISM CONNECTED TO THE PARKING BRAKE RELEASE MEANS FOR ACTUATION THEREOF, A CONDUIT ESTABLISHING FLUID COMMUNICATION BETWEEN THE FLUID PRESSURE OPERATED BRAKE RELEASING MECHANISM AND THE FLUID PRESSURE SOURCE DEVELOPED WHEN THE ENGINE IS RUNNING, VALVE MEANS IN SAID CONDUIT ADAPTED TO CONTROL THE APPLICATION OF FLUID PRESSURE FROM THE FLUID PRESSURE SOURCE WHEN THE ENGINE IS RUNNING TO THE FLUID PRESSURE OPERATED BRAKE RELEASING MECHANISM, AND VALVE CONTROL MEANS RESPONSIVE TO BOTH THE TRANSMISSION SELECTION MECHANISM BEING SET FOR INTENDED VEHICLE MOVEMENT AND THE FOOT PEDAL BEING OPERATED FOR INTENDED VEHICLE MOVE-
Claim 2
Dependent Claim
178 words
IN COMBINATION WITH AN AUTOMOTIVE VEHICLE HAVING AN ENGINE WHICH CREATES A PRESSURE SOURCE DIFFERENT FROM AMBIENT WHEN RUNNING, A TRANSMISSION SELECTION MECHANISM, A FOOT PEDAL WHICH IS OPERATED UPON INTENDED MOVEMENT OF THE VEHICLE, AND A SETTABLE PARKING BRAKE HAVING A RELEASE MEANS WHEN ACTUATED EFFECTIVE TO RELEASE THE SET BRAKE, AN IMPROVED APPARATUS FOR AUTOMATICALLY RELEASING THE PARKING BRAKE UPON THE SIMULTANEOUS OCCURRENCE OF GIVEN CONDITIONS INDICATIVE OF INTENDED ACTUAL MOVEMENT OF THE VEHICLE, THE APPARATUS COMPRISING; A FLUID PRESSURE OPERATED BRAKE RELEASING MECHANISM CONNECTED TO THE PARKING BRAKE RELEASE MEANS FOR ACTUATION THEREOF, A CONDUIT ESTABLISHING FLUID COMMUNICATION BETWEEN THE FLUID PRESSURE OPERATED BRAKE RELEASING MECHANISM AND THE FLUID PRESSURE SOURCE DEVELOPED WHEN THE ENGINE IS RUNNING, VALVE MEANS IN SAID CONDUIT ADAPTED TO CONTROL THE APPLICATION OF FLUID PRESSURE FROM THE FLUID PRESSURE SOURCE WHEN THE ENGINE IS RUNNING TO THE FLUID PRESSURE OPERATED BRAKE RELEASING MECHANISM, AND VALVE CONTROL MEANS RESPONSIVE TO BOTH THE TRANSMISSION SELECTION MECHANISM BEING SET FOR INTENDED VEHICLE MOVEMENT AND THE FOOT PEDAL BEING OPERATED FOR INTENDED VEHICLE MOVE-
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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |