US3301573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light duty tandem axle suspension
Assignee: Hickman Developments Inc
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Filing: 1964-09-04
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Granted: 1967-01-31
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Expires: 1984-09-04
Abstract
No abstract record available.
Inventors
- 👤 Albert F Hickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:07
CPC Classifications
B; B60; B60G; B60G5/00; B60G5/04; B60G2200/00; B60G2200/30; B60G2200/32; B60G2200/324; B60G2204/00; B60G2204/40; B60G2204/41; B60G2204/422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
229 words
A TANDEM AXLE SPRING SUSPENSION ADAPTED TO BE INTERPOSED BETWEEN A VEHICLE FRAME AND A PAIR OF TANDEM AXLES EACH HAVING RUBBER TIRED WHEELS JOURNALLED AT THE ENDS THEREOF, COMPRISING A WALKING BEAM ARRANGED AT EACH SIDE OF SAID FRAME AND EXTENDING LENGTHWISE THEREOF CLOSE TO THE INNER VERTICAL FACES OF THE CORRESPONDING PAIR OF TIRES, A HORIZONTAL CROSS ROD EXTENDING TRANSVERSELY OF SAID FRAME INTO THE SPACE BETWEEN SAID TIRES AT EACH SIDE OF SAID VEHICLE AND WITH ITS ENDS ARRANGED ADJACENT THE CENTRAL PARTS OF SAID WALKING BEAMS, BEARING MEANS JOURNALLING SAID CROSS ROD NEAR THE RESPECTIVE ENDS THEREOF ON SAID CENTRAL PARTS OF SAID WALKING BEAMS, A CROSS ROD BRACKET SECURED TO EACH END OF SAID CROSS ROD AND HAVING UPRIGHT FACES FACING IN OPPOSITE DIRECTIONS, A FRAME BRACKET RIGIDLY CONECTED TO SAID FRAME AND HAVING UPRIGHT FACES SEVERALLY OPPOSING THE CORRESPONDING FACES OF AID CROSS ROD BRACKET, A RUBBER BODY SECURED AT ITS OPPOSITE UPRIGHT FACES TO EACH COMPANION PAIR OF UPRIGHT FACES OF SAID CROSS ROD BRACKET AND FRAME BRACKET AND ARRANGED SUBSTANTIALLY WHOLLY EXTERIORLY OF THE VERTICAL PLANE OF SAID INNER VERTICAL FACES OF THE CORRESPONDING PAIR OF TIRES, AND SAID RUBBER BODIES BEING DISTORTED IN UPRIGHT SHEAR IN SUPPORTING EACH FRAME BRACKET ON ITS CROSS ROD BRACKET, AND MEANS MOVABLY CONNECTING EACH END OF EACH WALKING BEAM WITH A CORRESPONDING AXLE END.
Claim 2
Dependent Claim
229 words
A TANDEM AXLE SPRING SUSPENSION ADAPTED TO BE INTERPOSED BETWEEN A VEHICLE FRAME AND A PAIR OF TANDEM AXLES EACH HAVING RUBBER TIRED WHEELS JOURNALLED AT THE ENDS THEREOF, COMPRISING A WALKING BEAM ARRANGED AT EACH SIDE OF SAID FRAME AND EXTENDING LENGTHWISE THEREOF CLOSE TO THE INNER VERTICAL FACES OF THE CORRESPONDING PAIR OF TIRES, A HORIZONTAL CROSS ROD EXTENDING TRANSVERSELY OF SAID FRAME INTO THE SPACE BETWEEN SAID TIRES AT EACH SIDE OF SAID VEHICLE AND WITH ITS ENDS ARRANGED ADJACENT THE CENTRAL PARTS OF SAID WALKING BEAMS, BEARING MEANS JOURNALLING SAID CROSS ROD NEAR THE RESPECTIVE ENDS THEREOF ON SAID CENTRAL PARTS OF SAID WALKING BEAMS, A CROSS ROD BRACKET SECURED TO EACH END OF SAID CROSS ROD AND HAVING UPRIGHT FACES FACING IN OPPOSITE DIRECTIONS, A FRAME BRACKET RIGIDLY CONECTED TO SAID FRAME AND HAVING UPRIGHT FACES SEVERALLY OPPOSING THE CORRESPONDING FACES OF AID CROSS ROD BRACKET, A RUBBER BODY SECURED AT ITS OPPOSITE UPRIGHT FACES TO EACH COMPANION PAIR OF UPRIGHT FACES OF SAID CROSS ROD BRACKET AND FRAME BRACKET AND ARRANGED SUBSTANTIALLY WHOLLY EXTERIORLY OF THE VERTICAL PLANE OF SAID INNER VERTICAL FACES OF THE CORRESPONDING PAIR OF TIRES, AND SAID RUBBER BODIES BEING DISTORTED IN UPRIGHT SHEAR IN SUPPORTING EACH FRAME BRACKET ON ITS CROSS ROD BRACKET, AND MEANS MOVABLY CONNECTING EACH END OF EACH WALKING BEAM WITH A CORRESPONDING AXLE END.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |