Patent US3593815A successfully refreshed from Google Patents.
US3593815A
Expired / Lapsed
US
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System for automatically operating parking brake for automobiles
Assignee: Individual
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Filing: 1968-10-07
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Granted: 1971-07-20
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Expires: 1988-10-07
Abstract
Abstract A system for automatically actuating and deactuating a parking brake for an acceleratable engine-driven vehicle whereby use is made of a ''''go'''' signal representing a vehicle operating mode, in which the vehicle is permitted to move or the vehicle is actually in movement, and a ''''stop'''' signal representing another mode in which the vehicle is brought to a stop or is stationary. A logic unit responds to these signals, discriminating between the corresponding modes, and transmits a control signal to a brake controller circuit.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:42
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
121 words
A method of automatically deactuating a parking brake that has been actuated to hold stationary an engine driven automotive vehicle provided with said parking brake separately from an operator''s manipulated main brake for the movement control of and stopping the vehicle at the operator''s will, said parking brake being actuated once the vehicle is brought to a stop irrespective of whether or not said engine is in operation, said method comprising the steps of bringing said engine into operation while holding said parking brake actuated, accelerating the operation of said engine for an intended start of said vehicle, detecting said acceleration and generating an electric signal indicative of said acceleration, and rendering said parking brake deactuated in response to said signal.
Claim 2
Independent Claim
121 words
A method of automatically deactuating a parking brake that has been actuated to hold stationary an engine driven automotive vehicle provided with said parking brake separately from an operator''s manipulated main brake for the movement control of and stopping the vehicle at the operator''s will, said parking brake being actuated once the vehicle is brought to a stop irrespective of whether or not said engine is in operation, said method comprising the steps of bringing said engine into operation while holding said parking brake actuated, accelerating the operation of said engine for an intended start of said vehicle, detecting said acceleration and generating an electric signal indicative of said acceleration, and rendering said parking brake deactuated in response to said signal.
Claim 3
Independent Claim
94 words
A method of automatically deactuating a parking brake for an engine driven automotive vehicle comprising the steps of bringing the engine into operation, accelerating the operation of said engine for an intended start of said vehicle, generating a signal indicative of said acceleration, and rendering said brake deactuated in response to said signal, said signal being an electric signal substantially proportional in magnitude to the revolution speed of said engine and said brake being deactuated when said signal is in excess of a predetermined level as a result of the acceleration of said engine.
Claim 4
Independent Claim
94 words
A method of automatically deactuating a parking brake for an engine driven automotive vehicle comprising the steps of bringing the engine into operation, accelerating the operation of said engine for an intended start of said vehicle, generating a signal indicative of said acceleration, and rendering said brake deactuated in response to said signal, said signal being an electric signal substantially proportional in magnitude to the revolution speed of said engine and said brake being deactuated when said signal is in excess of a predetermined level as a result of the acceleration of said engine.
Claim 5
Dependent Claim
21 words
A method defined in claim 2 wherein said predetermined level is that which corresponds to an idling speed of said engine.
Claim 6
Independent Claim
90 words
A method of automatically actuating a parking brake for an engine driven automotive vehicle, said brake having been deactuated by the steps of bringing the engine into oPeration, accelerating the operation of said engine for an intended start of said vehicle, generating a first signal indicative of said acceleration, and rendering said brake deactuated in response to said signal, said method comprising the steps of detecting a second signal indicative of motion of said vehicle, and rendering said brake actuated when said second signal indicates that the vehicle has stopped.
Claim 7
Independent Claim
90 words
A method of automatically actuating a parking brake for an engine driven automotive vehicle, said brake having been deactuated by the steps of bringing the engine into oPeration, accelerating the operation of said engine for an intended start of said vehicle, generating a first signal indicative of said acceleration, and rendering said brake deactuated in response to said signal, said method comprising the steps of detecting a second signal indicative of motion of said vehicle, and rendering said brake actuated when said second signal indicates that the vehicle has stopped.
Claim 8
Dependent Claim
40 words
A method defined in claim 4 wherein said second signal is an electric signal substantially proportional in magnitude to the speed of said vehicle and said brake is actuated upon drop of said second electric signal to substantially null level.
Claim 9
Independent Claim
131 words
A system for automatically operating a parking brake for an automotive vehicle driven by an acceleratable engine which comprises first sensing means operatively associated with said acceleratable engine for generating a first signal in response to the acceleration of said engine, second sensing means adapted to respond to the movement of said vehicle for generating a second signal indicative of said movement of the vehicle, a brake applicator mechanism for said brake, and control means for said applicator mechanism operatively associated with said first and second sensing means for rendering said brake applicator mechanism effective to deactuate said brake upon and during receipt of at least one of said signals and for rendering said brake applicator mechanism effective to actuate said brake upon and during the absence of both said signals.
Claim 10
Independent Claim
131 words
A system for automatically operating a parking brake for an automotive vehicle driven by an acceleratable engine which comprises first sensing means operatively associated with said acceleratable engine for generating a first signal in response to the acceleration of said engine, second sensing means adapted to respond to the movement of said vehicle for generating a second signal indicative of said movement of the vehicle, a brake applicator mechanism for said brake, and control means for said applicator mechanism operatively associated with said first and second sensing means for rendering said brake applicator mechanism effective to deactuate said brake upon and during receipt of at least one of said signals and for rendering said brake applicator mechanism effective to actuate said brake upon and during the absence of both said signals.
Claim 11
Dependent Claim
51 words
A system as defined in claim 6 wherein said control means includes a voltage source, switching means and load impedance such that when said switching means is closed responsive to at least one of said signals said impedance is energized to render said brake applicator mechanism effective to deactuate said brake.
Claim 12
Dependent Claim
42 words
A system as defined in claim 7 wherein said brake applicator mechanism includes a reversibly driven electric motor providing the actuation and deactuation of said brake, and said load impedance is a relay coil adapted to govern the operation of said motor.
Claim 13
Dependent Claim
41 words
A system as defined in claim 7 wherein said brake applicator mechanism includes a hydraulic arrangement having an electromagnetically controlled valve for effecting the actuation and deactuation of said brake and said load impedance is a control coil for said valve.
Claim 14
Dependent Claim
68 words
A system as defined in claim 6 wherein said first sensing means includes a sensing coil receiving an electric signal as said first signal substantially proportional in magnitude to the operation speed of said engine and said second sensing means includes a second sensing coil adapted to receive a second electric signal as said second signal substantially proportional in magnitude to the rotation of wheels of said vehicle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |