US3690425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically damped vehicle suspension device
Assignee: Individual
•
Filing: 1970-09-10
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Granted: 1972-09-12
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Expires: 1990-09-10
Abstract
Abstract A hydraulically damped vehicular suspension device comprises a self-contained damper unit which incorporates a shock absorber and which can be easily fitted into a pipe carrying a wheel-axle journal at its lower end. In order to replace the damper unit in the outer pipe it is only necessary to unscrew a lock nut and uncouple the damping cylinder of the inserted unit from the vehicle chassis. The device may also include means for cooling the damping cylinder in use.
Inventors
- 👤 Jean Herbert Willich
- 👤 Walter Bruninghaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:35
CPC Classifications
B; B60; B60G; B60G3/00; B60G3/01; B60G13/00; B60G13/001; B60G13/005; B60G13/008; B60G13/02; B60G13/06; B60G13/08; B60G2204/00; B60G2204/40; B60G2204/418; B60G2204/423; B60G2204/4232
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A vehicular suspension device comprising: an open-topped upright pipe provided at its lower end with a wheel-axle journal and with an internal bottom stop; a damping unit extending from above into said pipe and resting on said bottom stop, said unit including a tube coaxial with said pipe, a damping cylinder provided with a downwardly projecting piston rod coaxially received in said tube with annular clearance, annular guide means in said clearance centering said cylinder with reference to said tube while enabling relative axial displacement thereof, said tube having a plugged lower end anchored to said piston rod and an upper end sealingly engaging said cylinder, and lubricant in said clearance facilitating relative axial motion between said tube and said cylinder, the latter being provided with mounting means for securing same to an overlying vehicular chassis; and releasable locking means detachably connecting the upper end of said tube with the top of said pipe, said damping unit being bodily extractable from said pipe upon the release of said locking means.
Claim 2
Dependent Claim
170 words
A vehicular suspension device comprising: an open-topped upright pipe provided at its lower end with a wheel-axle journal and with an internal bottom stop; a damping unit extending from above into said pipe and resting on said bottom stop, said unit including a tube coaxial with said pipe, a damping cylinder provided with a downwardly projecting piston rod coaxially received in said tube with annular clearance, annular guide means in said clearance centering said cylinder with reference to said tube while enabling relative axial displacement thereof, said tube having a plugged lower end anchored to said piston rod and an upper end sealingly engaging said cylinder, and lubricant in said clearance facilitating relative axial motion between said tube and said cylinder, the latter being provided with mounting means for securing same to an overlying vehicular chassis; and releasable locking means detachably connecting the upper end of said tube with the top of said pipe, said damping unit being bodily extractable from said pipe upon the release of said locking means.
Claim 3
Dependent Claim
48 words
A suspension device as defined in claim 1 wherein said piston rod has a threaded extremity passing through said plugged lower end of said tube and provided with a bottom bearing from below upon said lower end, said bottom stop comprising a fixed plate underlying said bottom nut.
Claim 4
Dependent Claim
54 words
A suspension device as defined in claim 1 wherein the top of said pipe is internally threaded, said locking means comprising a clamping nut screwed into said top and secured to said tube as a rotatable but axially fixed upward extension thereof, said clamping nut being provided with packing means bearing upon said cylinder.
Claim 5
Dependent Claim
37 words
A suspension device as defined in claim 3, further comprising a bellows secured to the top of said pipe and to an upper extremity of said cyliNder projecting from said tube, said bellows enveloping said clamping nut.
Claim 6
Dependent Claim
31 words
A suspension device as defined in claim 3 wherein said clamping nut is provided with an outer circumferential groove, said tube having an inner annular bead matingly engaging in said groove.
Claim 7
Dependent Claim
53 words
A suspension device as defined in claim 3 wherein said guide means comprises an upper ring adjacent said clamping nut and a lower ring axially spaced from said upper ring, said lower ring dividing said clearance into an upper chamber for said lubricant and a lower chamber open toward said plugged lower end.
Claim 8
Dependent Claim
51 words
A suspension device as defined in claim 6 wherein said tube is provided with at least one air hole beneath said lower ring, said pipe being provided with apertures at levels above and below said air hole to facilitate the pumping of atmospheric air into and out of said lower chamber.
Claim 9
Dependent Claim
21 words
A suspension device as defined in claim 7 wherein said pipe is externally provided with protective shroud means overlying said apertures.
References Cited (Backward Citations)
US3499505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |