US3592302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic shock absorbers
Assignee: Individual
•
Filing: 1968-12-06
•
Granted: 1971-07-13
•
Expires: 1988-12-06
Abstract
Abstract This invention relates to a telescopic hydraulic shock absorber in which flow of hydraulic fluid in the direction from the working chamber of the shock absorber to a compensating chamber through an apertured element is controlled by a flexible valve shim which opens by flexing under the effect of a fluid pressure differential in said direction, and is characterized by the provision of a profiled stop which first limits opening of the shim to an extent which presents only a relatively small fluid flow area and then permits flexing of an outer region of the shim to afford opening to a greater extent which presents a larger fluid flow area.
Inventors
- 👤 Fernand Stanislas Allinquant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:23
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/06; F16F9/066; F16F9/067; F16F9/32; F16F9/34; F16F9/348; F16F9/3485; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
193 words
In a telescopic shock absorber comprising piston means incorporating damping passage means therethrough and a piston rod reciprocable in a working chamber containing a damping fluid and connected to a compensating chamber by first and second respective one-way passage means for controlling flow of the damping fluid from the working chamber to the compensating chamber and from the compensating chamber to the working chamber respectively, the improvement comprising the provision, in the first passage means, of a control valve comprising a spring leaf adapted to cover said first passage means in a resting position of the spring leaf and to flex therefrom with relatively low restrain upon exertion to relatively small damping fluid pressures from said working chamber, and an abutting member having a convex abutting surface which is spaced from the spring leaf when in said resting position, the spring leaf being adapted to engage a region of said convex surface at the end of a predetermined relatively unrestrained deflection of said spring valve and thereafter to further flex in contact engagement with said abutting surface with relatively high restrain upon exertion of relatively largE damping fluid pressures from said working chamber.
Claim 2
Dependent Claim
193 words
In a telescopic shock absorber comprising piston means incorporating damping passage means therethrough and a piston rod reciprocable in a working chamber containing a damping fluid and connected to a compensating chamber by first and second respective one-way passage means for controlling flow of the damping fluid from the working chamber to the compensating chamber and from the compensating chamber to the working chamber respectively, the improvement comprising the provision, in the first passage means, of a control valve comprising a spring leaf adapted to cover said first passage means in a resting position of the spring leaf and to flex therefrom with relatively low restrain upon exertion to relatively small damping fluid pressures from said working chamber, and an abutting member having a convex abutting surface which is spaced from the spring leaf when in said resting position, the spring leaf being adapted to engage a region of said convex surface at the end of a predetermined relatively unrestrained deflection of said spring valve and thereafter to further flex in contact engagement with said abutting surface with relatively high restrain upon exertion of relatively largE damping fluid pressures from said working chamber.
Claim 3
Dependent Claim
41 words
A shock absorber as claimed in claim 1, wherein the spring leaf and abutting member are disc-shaped and arranged around a common axis, and said region of the convex surface is radially nearer to the axis than the first passage means.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |