← Back to Patent Explorer
US4635960A Expired / Lapsed US ⏱️ 0.0 years remaining

Control system for hydraulic dampers

Assignee: Tokico Ltd
•
Filing: 1985-10-09
•
Granted: 1987-01-13
•
Expires: 2005-10-09
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A control system for controlling the damping force of a plurality of hydraulic dampers, each of which includes a damping force producing mechanism; a damping force adjustment members for adjusting the effective passage area of an oil passage in the damping force producing mechanism; and an actuator connected to the damping force adjustment member, comprises an indicator circuit for indicating the adjusted and en-route conditions of at least one damping force producing mechanism; an electric power supply circuit for supplying electric power to respective actuators; and the power supply circuit being provided with an inhibiting circuit for inhibiting the supply of power to an actuator associated with a damping force adjustment member which has already been adjusted, through a part of the power supply circuit associated with a damping force adjustment member which has yet not been adjusted.

Inventors

  • 👤 Takashi Shirakuma

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 22:26
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/06; B60G17/08; F; F16; F16F; F16F9/00; F16F9/32; F16F9/44; F16F9/46; F16F9/461; F16F9/462; B60G11/00; B60G11/26; B60G17/015; B60G17/018

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 143 words
A control system for controlling the damping force of a plurality of hydraulic dampers, each of said dampers including a damping force producing mechanism; a damping force adjustment member for adjusting the effective passage area of an oil passage in the damping force producing mechanism; and an actuator connected to the damping force adjustment member, said system characterized by comprising: an indicator circuit for indicating the adjusted and en-route conditions of at least one damping force producing mechanism; an electric power supply circuit for supplying electric power to respective actuators; and said power supply circuit being provided with an inhibiting circuit for inhibiting the supply of power to an actuator associated with a damping force adjustment member which has already been adjusted, through a part of the power supply circuit associated with a damping force adjustment member which has yet not been adjusted.
Claim 2
Dependent Claim 143 words
A control system for controlling the damping force of a plurality of hydraulic dampers, each of said dampers including a damping force producing mechanism; a damping force adjustment member for adjusting the effective passage area of an oil passage in the damping force producing mechanism; and an actuator connected to the damping force adjustment member, said system characterized by comprising: an indicator circuit for indicating the adjusted and en-route conditions of at least one damping force producing mechanism; an electric power supply circuit for supplying electric power to respective actuators; and said power supply circuit being provided with an inhibiting circuit for inhibiting the supply of power to an actuator associated with a damping force adjustment member which has already been adjusted, through a part of the power supply circuit associated with a damping force adjustment member which has yet not been adjusted.
Claim 3
Dependent Claim 25 words
The control system according to claim 1, wherein said indicator circuit includes a selector circuit for selecting any one of said plurality of hydraulic dampers.
Claim 4
Dependent Claim 20 words
The control system according to claim 2, wherein said selector circuit comprises a rotary switch having at least four contacts.
Claim 5
Dependent Claim 20 words
The control system according to claim 2, wherein said selector circuit comprises a pattern switch having at least four contacts.

References Cited (Backward Citations)

US3559776A Cited
US4313529A Cited
US4466625A Cited
US4463839A Cited
US4527676A Cited
US4564214A Cited
US4575115A Cited
US4564215A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-01-12 1990-07-14 1991-01-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-01-12 1994-07-14 1995-01-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-01-12 1998-07-14 1999-01-13 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag