Patent US3870336A successfully refreshed from Google Patents.
US3870336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle suspension
Assignee: Individual
•
Filing: 1973-06-01
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Granted: 1975-03-11
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Expires: 1993-06-01
Abstract
Abstract A vehicle suspension suitable for trucks and trailers positions a wheel and axle assembly on the vehicle on the trailing ends of a pair of single leaf springs arranged to urge the wheel and axle assembly toward the vehicle so as to lift the same from a road surface. Air bags are positioned between the wheel and axle assembly and the vehicle and means for inflating and deflating the air bags permit the wheel and axle assembly to be lifted from the road surface or engaged therewith in a weight carrying relation to the vehicle. The single leaf springs are attached at their forward ends to the conventional spring and axle assembly of the vehicle.
Inventors
- 👤 Michael Bilas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:14
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/32; B60G11/34; B60G11/46; B60G11/465; B62; B62D; B62D61/00; B62D61/12; B62D61/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A wheel suspension for a vehicle having a First wheel and axle assembly and first springs on said wheel and axle assembly arranged to pivotally engage said vehicle, said suspension including an auxiliary wheel and axle assembly, parallel elongated secondary springs having opposite end portions attached to said first wheel and axle assembly and to said auxiliary wheel and axle assembly, said parallel elongated secondary springs normally urging said auxiliary wheel and axle assembly toward said vehicle and air bags positioned between said auxiliary wheel and axle assembly and said vehicle acting when inflated to move said auxiliary wheel and axle assembly away from said vehicle and means for inflating and deflating said air bags.
Claim 2
Dependent Claim
115 words
A wheel suspension for a vehicle having a First wheel and axle assembly and first springs on said wheel and axle assembly arranged to pivotally engage said vehicle, said suspension including an auxiliary wheel and axle assembly, parallel elongated secondary springs having opposite end portions attached to said first wheel and axle assembly and to said auxiliary wheel and axle assembly, said parallel elongated secondary springs normally urging said auxiliary wheel and axle assembly toward said vehicle and air bags positioned between said auxiliary wheel and axle assembly and said vehicle acting when inflated to move said auxiliary wheel and axle assembly away from said vehicle and means for inflating and deflating said air bags.
Claim 3
Dependent Claim
115 words
A wheel suspension for a vehicle having a First wheel and axle assembly and first springs on said wheel and axle assembly arranged to pivotally engage said vehicle, said suspension including an auxiliary wheel and axle assembly, parallel elongated secondary springs having opposite end portions attached to said first wheel and axle assembly and to said auxiliary wheel and axle assembly, said parallel elongated secondary springs normally urging said auxiliary wheel and axle assembly toward said vehicle and air bags positioned between said auxiliary wheel and axle assembly and said vehicle acting when inflated to move said auxiliary wheel and axle assembly away from said vehicle and means for inflating and deflating said air bags.
Claim 4
Dependent Claim
115 words
A wheel suspension for a vehicle having a First wheel and axle assembly and first springs on said wheel and axle assembly arranged to pivotally engage said vehicle, said suspension including an auxiliary wheel and axle assembly, parallel elongated secondary springs having opposite end portions attached to said first wheel and axle assembly and to said auxiliary wheel and axle assembly, said parallel elongated secondary springs normally urging said auxiliary wheel and axle assembly toward said vehicle and air bags positioned between said auxiliary wheel and axle assembly and said vehicle acting when inflated to move said auxiliary wheel and axle assembly away from said vehicle and means for inflating and deflating said air bags.
Claim 5
Dependent Claim
43 words
The wheel suspension of claim 1 and wherein attachment means secures said first wheel and axle assembly to said first springs on said vehicle and one of the opposite end portions of said parallel elongated secondary springs are secured to said attachment means.
Claim 6
Dependent Claim
39 words
The wheel suspension of claim 2 and wherein said attachment means comprises U-bolt clamps and said parallel elongated secondary springs are positioned by said clamps between said first wheel and axle assembly and said first springs on said vehicle.
Claim 7
Dependent Claim
23 words
The vehicle suspension of claim 1 and wherein said parallel elongated secondary springs are single leaf springs of a U-shape in unloaded condition.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |