US3586920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile clutch disengaging apparatus
Assignee: Denso Corp
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Filing: 1969-06-04
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Granted: 1971-06-22
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Expires: 1989-06-04
Abstract
Abstract An automobile clutch disengaging apparatus comprising a first switch means adapted to be opened and closed in accordance with a lubricating oil pressure in the engine, a brake switch adapted to be opened and closed by the operation of a brake means, a second switch means adapted to be operated upon closure of said brake switch and said first switch means to permit power supply to a clutch disengaging solenoid, a holding circuit adapted to be operated upon closure of said second switch means to hold the latter in the closed state, and a third switch means for forcibly stopping the operation of said holding circuit, said second switch means including a self-holding circuit which is established by the fact that a current is caused to flow through said clutch disengaging solenoid. With this apparatus, the clutch is disengaged to cut off the connection between the wheels and the engine of a vehicle immediately when the engine is stopped as a result of the fact that the wheels are stopped from rotating when the vehicle is braked, so that the vehicle can be prevented from skidding while the wheels are stopped from rotating, by facilitating the rotation of the wheels when the brake force imparted to the vehicle is removed even in the case where the vehicle is running on a road such as frozen snow-covered one the surface of which represents a low coefficient of friction with respect to the wheels.
Inventors
- 👤 Hisato Wakamatsu
- 👤 Noriyoshi Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:59
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/103; B60T8/00; B60T8/17; B60T8/176; B60T8/1763; B60T8/17633
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
223 words
A clutch disengaging apparatus for use in a wheeled motor vehicle having an engine lubricated by lubricating oil, brake means and a clutch for engaging and disengaging the wheels of said vehicle with said engine, said apparatus comprising: first switch means constructed to be opened and closed in accordance with the pressure of said lubricating oil in the engine, a brake switch connnected with said first switch means and constructed to be opened and closed by the operation of said brake means, second switch means connected in circuit with said first switch means and said brake switch and arranged to be closed upon closure of said brake switch and said first switch means, a solenoid connected with said second switch means for disengaging said clutch from said engine upon the clutch from said engine upon the closure of said second switch means, holding circuit means connected with said first switch means, for maintaining the closure of said second switch means after said second switch means has been once closed even after said first switch means is opened, and third switch means, connected in series with said holding circuit means, for discontinuing the operation of said holding circuit means, said second switch means including a self-holding circuit for maintaining the closure of said second switch means even after said brake switch has been opened.
Claim 2
Dependent Claim
223 words
A clutch disengaging apparatus for use in a wheeled motor vehicle having an engine lubricated by lubricating oil, brake means and a clutch for engaging and disengaging the wheels of said vehicle with said engine, said apparatus comprising: first switch means constructed to be opened and closed in accordance with the pressure of said lubricating oil in the engine, a brake switch connnected with said first switch means and constructed to be opened and closed by the operation of said brake means, second switch means connected in circuit with said first switch means and said brake switch and arranged to be closed upon closure of said brake switch and said first switch means, a solenoid connected with said second switch means for disengaging said clutch from said engine upon the clutch from said engine upon the closure of said second switch means, holding circuit means connected with said first switch means, for maintaining the closure of said second switch means after said second switch means has been once closed even after said first switch means is opened, and third switch means, connected in series with said holding circuit means, for discontinuing the operation of said holding circuit means, said second switch means including a self-holding circuit for maintaining the closure of said second switch means even after said brake switch has been opened.
Claim 3
Dependent Claim
35 words
Apparatus as in claim 1 wherein said first switch means is constructed to be closed when the pressure of said oil decreases substantially to the level caused by at least near stoppage of said engine.
Claim 4
Dependent Claim
65 words
Apparatus as in claim 1, wherein said second switch means comprises: a first transistor connected in series with said solenoid to said power source for switching the power supply to said solenoid, and a second transistor connected in circuit with said first transistor for controlling the switching operation of said first transistor in response to the operation of said brake switch and first switch means.
Claim 5
Dependent Claim
201 words
An automobile clutch disengaging apparatus for use with a motor vehicle having an engine and braking system, comprising: first switch means constructed to be opened and closed respectively in response to starting and stopping of said engine, a brake switch constructed to be opened and closed in accordance with the operation of said braking system, second switch means connected with said first switch means and said brake switch and having an opening and closing element which is closed by closure of said first switch means and said brake switch, a clutch disengaging solenoid connected to said opening and closing element of said second switch means, a holding circuit connected with said first switch means and operative by sensing a current flowing through said solenoid to hold said element of said second switch means closed even if said first switch means opens, and actuatable third switch means connected with said holding circuit to release the holding of said holding circuit when actuated, said second switch means being arranged to supply an output signal thereof to the input side thereof to hold said opening and closing element closed even if said brake switch is opened and until said third switch means is actuated.
Claim 6
Dependent Claim
201 words
An automobile clutch disengaging apparatus for use with a motor vehicle having an engine and braking system, comprising: first switch means constructed to be opened and closed respectively in response to starting and stopping of said engine, a brake switch constructed to be opened and closed in accordance with the operation of said braking system, second switch means connected with said first switch means and said brake switch and having an opening and closing element which is closed by closure of said first switch means and said brake switch, a clutch disengaging solenoid connected to said opening and closing element of said second switch means, a holding circuit connected with said first switch means and operative by sensing a current flowing through said solenoid to hold said element of said second switch means closed even if said first switch means opens, and actuatable third switch means connected with said holding circuit to release the holding of said holding circuit when actuated, said second switch means being arranged to supply an output signal thereof to the input side thereof to hold said opening and closing element closed even if said brake switch is opened and until said third switch means is actuated.
Claim 7
Dependent Claim
44 words
Apparatus as in claim 4, wherein said second switch means comprises a first transistor and a second transistor which is made conductive by said first transistor, and the output side of said second transistor is connected to the input side of said first transistor.
Claim 8
Dependent Claim
21 words
Apparatus as in claim 1, wherein said first switch means is opened and closed by lubricating oil pressure in the engine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |