Patent US4220352A successfully refreshed from Google Patents.
US4220352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension for a front axle of a trailer
Assignee: Komatsu Ltd
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Filing: 1978-10-13
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Granted: 1980-09-02
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Expires: 1998-10-13
Abstract
Abstract A suspension for a front axle of a trailer comprising a trailer frame, an outer cylindrical member fixedly secured to the trailer frame, a bracket mounted on the front axle, a shaft mounted on the bracket and arranged at right angles to the front axle, a sleeve rotatably mounted on the shaft, an inner cylindrical member fixedly secured to the sleeve and adapted to slide within the outer cylindrical member, a first spring retainer pivotally mounted on the outer cylindrical member, a second spring retainer pivotally mounted on the sleeve, and a spring disposed between the first and second spring retainers.
Inventors
- 👤 Haruhiko Umeda
- 👤 Masaru Uenoyama
- 👤 Kotoshige Ishizuki
- 👤 Hiroyuki Ando
- 👤 Naotaka Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:22
CPC Classifications
B; B60; B60G; B60G3/00; B60G3/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A suspension for a front axle of a trailer comprising a frame of the trailer; an outer cylindrical member fixedly secured to said frame; bracket means mounted on said front axle; shaft means mounted on said bracket means, said shaft means being arranged at right angles to said front axle; a sleeve rotatably mounted on said shaft means; an inner cylindrical member fixedly secured to said sleeve and adapted to slide within said outer cylindrical member; a first spring retainer pivotally mounted on said outer cylindrical member; a second spring retainer pivotally mounted on said sleeve; spring means disposed between said first and second spring retainers; and a cylindrical bushing disposed between said outer and inner cylindrical members.
Claim 2
Dependent Claim
118 words
A suspension for a front axle of a trailer comprising a frame of the trailer; an outer cylindrical member fixedly secured to said frame; bracket means mounted on said front axle; shaft means mounted on said bracket means, said shaft means being arranged at right angles to said front axle; a sleeve rotatably mounted on said shaft means; an inner cylindrical member fixedly secured to said sleeve and adapted to slide within said outer cylindrical member; a first spring retainer pivotally mounted on said outer cylindrical member; a second spring retainer pivotally mounted on said sleeve; spring means disposed between said first and second spring retainers; and a cylindrical bushing disposed between said outer and inner cylindrical members.
Claim 3
Dependent Claim
39 words
The suspension as defined in claim 1 wherein said first spring retainer is mounted on said outer cylindrical member by a first swivel joint and said second spring retainer is mounted on said sleeve by a second swivel joint.
Claim 4
Dependent Claim
151 words
A suspension for a front axle of a trailer comprising a trailer frame; an outer cylindrical member fixedly secured to said trailer frame; bracket means mounted on said front axle; shaft means mounted on said bracket means, said shaft means being arranged at right angles to said front axle; a sleeve rotatably mounted on said shaft means; an intermediate cylindrical member fixedly secured to said sleeve and adapted to slide within said outer cylindrical member; an inner cylindrical member suspended from said outer cylindrical member and adapted to slide within said intermediate cylindrical member, said inner cylindrical member having fluid and compressed gaseous medium contained therein; a first bushing inwardly mounted on said intermediate cylinder; a second bushing outwardly mounted on said inner cylindrical member defining a cylindrical chamber between said first and second bushings; and means for communicating said cylindrical chamber with the fluid contained in said inner cylindrical member.
Claim 5
Dependent Claim
151 words
A suspension for a front axle of a trailer comprising a trailer frame; an outer cylindrical member fixedly secured to said trailer frame; bracket means mounted on said front axle; shaft means mounted on said bracket means, said shaft means being arranged at right angles to said front axle; a sleeve rotatably mounted on said shaft means; an intermediate cylindrical member fixedly secured to said sleeve and adapted to slide within said outer cylindrical member; an inner cylindrical member suspended from said outer cylindrical member and adapted to slide within said intermediate cylindrical member, said inner cylindrical member having fluid and compressed gaseous medium contained therein; a first bushing inwardly mounted on said intermediate cylinder; a second bushing outwardly mounted on said inner cylindrical member defining a cylindrical chamber between said first and second bushings; and means for communicating said cylindrical chamber with the fluid contained in said inner cylindrical member.
Claim 6
Dependent Claim
20 words
The suspension as defined in claim 3 further comprising a third bushing disposed between said outer and intermediate cylindrical members.
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) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |