US3578355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air suspension system
Assignee: Individual
•
Filing: 1969-01-29
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Granted: 1971-05-11
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Expires: 1989-01-29
Abstract
Abstract An air suspension leaf spring assembly for drop center axles used on vehicles, such as trucks and the like. The leaf spring is secured to the axle at its center and suspended from the vehicle frame at an intermediate point by an air spring, with the ends of said leaf spring being free to move in a restricted vertical path.
Inventors
- 👤 Carl E Oeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:29
CPC Classifications
B; B62; B62D; B62D61/00; B62D61/12; B62D61/125; B60; B60G; B60G11/00; B60G11/32; B60G11/34; B60G11/46; B60G11/465; B60G2204/00; B60G2204/10; B60G2204/12; B60G2204/126; B60G2206/00; B60G2206/01; B60G2206/40; B60G2206/42; B60G2206/424
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
In combination with a vehicle body having a frame for mounting wheel assemblies, an improved suspension system comprising a forward and a rear bracket suspended from said frame, a leaf spring assembly disposed therebetween, each said bracket provided with a pair of side members for controlling the vertical movement of said leaf spring assembly between first and second positions and eliminating the side movement thereof, said leaf spring assEmbly comprising a plurality of contiguous pyramidially disposed leaves, one of said leaves having one end joined to said forward bracket and the other end joined to said leaf spring assembly at a first location, a drop center-type axle secured at said first location, and an air spring joining said frame to said leaf spring assembly at a second location, said second location being at a point between said first location and said rear bracket.
Claim 2
Dependent Claim
143 words
In combination with a vehicle body having a frame for mounting wheel assemblies, an improved suspension system comprising a forward and a rear bracket suspended from said frame, a leaf spring assembly disposed therebetween, each said bracket provided with a pair of side members for controlling the vertical movement of said leaf spring assembly between first and second positions and eliminating the side movement thereof, said leaf spring assEmbly comprising a plurality of contiguous pyramidially disposed leaves, one of said leaves having one end joined to said forward bracket and the other end joined to said leaf spring assembly at a first location, a drop center-type axle secured at said first location, and an air spring joining said frame to said leaf spring assembly at a second location, said second location being at a point between said first location and said rear bracket.
Claim 3
Dependent Claim
29 words
The combination claimed in claim 1 wherein the endmost forward portion of said leaf spring assembly is movable in a vertical path above the end of said leaf spring.
Claim 4
Dependent Claim
23 words
The combination claimed in claim 2 including a restraining member in said forward bracket above said endmost portion of said leaf spring assembly.
Claim 5
Dependent Claim
25 words
The combination claimed in claim 1 wherein said air spring comprises an air pressure chamber and means for pressurizing said chamber to a predetermined level.
Claim 6
Dependent Claim
28 words
The combination claimed in claim 4 wherein said means for pressurizing the chamber is a two-way valve permitting said collapse to collapse caused by any sudden impact thereon.
Claim 7
Dependent Claim
21 words
The combination claimed in claim 4 including a member on said rear bracket to counteract the action of said air spring.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |