US3556545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable trailer
Assignee: PEERLESS TRAILER AND TRUCK SER
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Filing: 1969-01-08
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Granted: 1971-01-19
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Expires: 1989-01-08
Abstract
Abstract An expandable trailer for highway trucks having a first frame attachable to a driving vehicle and a second frame attached to the first frame and to which the trailer wheels are journaled. The second frame comprises two transversely disposed girders which are transversely slidable with respect to the first frame, such girders being attached to each other telescopically in the transverse direction. Piston and cylinder means are attached to the second frame and are adapted transversely to expand and contract its girders with respect to the first frame, thereby transversely to vary the width or track of the wheels.
Inventors
- 👤 Frederick F Van Raden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:40
CPC Classifications
B; B60; B60B; B60B35/00; B60B35/02; B60B35/10; B60B35/1036; B60B35/1054; B60B35/1072; B60B35/109; B60Y; B60Y2200/00; B60Y2200/10; B60Y2200/14; B60Y2200/147
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
A transversely expandable trailer for highway trucks comprising: a first frame attachable to a driving vehicle; a second frame attached to said first frame, said second frame comprising two transversely disposed girders having a plurality of ground-contacting wheels journaled therefrom, said girders being attached to each other telescopically in the transverse direction, said girders being transversely slidable with respect to said first frame; an extension beam attached to each of said second frame girders; a longitudinally-oriented hydraulic cylinder attached to said first frame along the centerline thereof; a piston received within said cylinder; a first set of arms attached to said piston at their inner ends, said arms being attached at their outer ends to said extension beams of said second frame girders; and a second set of arms pivotally attached to said extension beams and to said first frame, said first and second sets of arms cooperating to cause said second frame girders to move slightly longitudinally while being urged transversely apart upon extension of said piston from said longitudinally-oriented cylinder.
Claim 2
Dependent Claim
172 words
A transversely expandable trailer for highway trucks comprising: a first frame attachable to a driving vehicle; a second frame attached to said first frame, said second frame comprising two transversely disposed girders having a plurality of ground-contacting wheels journaled therefrom, said girders being attached to each other telescopically in the transverse direction, said girders being transversely slidable with respect to said first frame; an extension beam attached to each of said second frame girders; a longitudinally-oriented hydraulic cylinder attached to said first frame along the centerline thereof; a piston received within said cylinder; a first set of arms attached to said piston at their inner ends, said arms being attached at their outer ends to said extension beams of said second frame girders; and a second set of arms pivotally attached to said extension beams and to said first frame, said first and second sets of arms cooperating to cause said second frame girders to move slightly longitudinally while being urged transversely apart upon extension of said piston from said longitudinally-oriented cylinder.
Claim 3
Dependent Claim
18 words
The trailer of claim 1 further comprising a telescoping crossbeam attached to and joining said second frame girders.
Claim 4
Dependent Claim
64 words
The trailer of claim 2 further comprising: a transversely-oriented hydraulic cylinder attached to one part of said telescoping crossbeam; and a piston received in said transversely-oriented cylinder and attached to the other part of said telescoping crossbeam, extension of said piston from said tr transversely-oriented cylinder expanding said crossbeam and assisting said longitudinally-oriented cylinder to vary the transverse spacing of said second frame girders.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |