Patent US4591186A successfully refreshed from Google Patents.
US4591186A
Expired / Lapsed
US
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Hydraulic shock absorbing device of adjustable damping force type
Assignee: Tokico Ltd
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Filing: 1984-10-16
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Granted: 1986-05-27
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Expires: 2004-10-16
Abstract
Abstract A hydraulic shock absorbing device of adjustable damping force type for use in a vehicle such as an automobile includes hydraulic dampers with the damping force thereof being adjustable between at least two, low and high damping force conditions, and a selective switching circuit operable by a driver of the vehicle for selectively determining the damping force condition of the dampers. At least one sensor is provided to detect the operating condition of the vehicle, such as the speed of the vehicle, the position of the gas pedal, the pressure in the braking system or the like, to generate a signal at a predetermined operating condition of the vehicle, and the signal is supplied to a control circuit for switching the dampers to the high damping force condition to override the switching circuit.
Inventors
- 👤 Masahiro Ashiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:33
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/0152; F; F16; F16F; F16F9/00; F16F9/32; F16F9/44; F16F9/46; F16F9/466; F16F9/467; F16F9/468
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A hydraulic shock absorbing device of adjustable damping force type for use in a vehicle, said device comprising: a hydraulic damper with the damping force thereof being adjustable between at least two, low and high damping force conditions; selective switching circuit means operable by a driver of the vehicle for selectively determining the damping force of the damper; at least one sensor means for detecting an operating condition of the vehicle; and control means connected to said sensor means for adjusting the damping force of said damper to said high damping force condition, in response to a predetermined operating condition of the vehicle detected by said sensor means, and thereby to predominate over said switching circuit means.
Claim 2
Dependent Claim
117 words
A hydraulic shock absorbing device of adjustable damping force type for use in a vehicle, said device comprising: a hydraulic damper with the damping force thereof being adjustable between at least two, low and high damping force conditions; selective switching circuit means operable by a driver of the vehicle for selectively determining the damping force of the damper; at least one sensor means for detecting an operating condition of the vehicle; and control means connected to said sensor means for adjusting the damping force of said damper to said high damping force condition, in response to a predetermined operating condition of the vehicle detected by said sensor means, and thereby to predominate over said switching circuit means.
Claim 3
Dependent Claim
34 words
A hydraulic shock absorbing device according to claim 1 wherein said sensor means comprise a pressure sensor detecting the hydraulic pressure in a brake cylinder and a sensor detecting the velocity of the vehicle.
Claim 4
Dependent Claim
37 words
A hydraulic shock absorbing device according to claim 1 wherein said sensor means comprise a sensor detecting the speed of the vehicle and a sensor detecting the rotating angle of a steering gear or a steering wheel.
Claim 5
Dependent Claim
27 words
A hydraulic shock absorbing device according to claim 1 wherein said sensor means comprise a sensor detecting the position of an accelerator pedal or a throttle lever.
References Cited (Backward Citations)
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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) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |