US3854747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laterally and longitudinally extensible truck
Assignee: Individual
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Filing: 1974-03-28
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Granted: 1974-12-17
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Expires: 1994-03-28
Abstract
Abstract A wheeled truck or cart having a rectangular bed frame expandable laterally and longitudinally with lateral and longitudinal slide tracks formed of angle members, affording sufficient contact of the sliding elements to give good cantilever support throughout their range of adjustment so that the cart may be adjusted in width and lengths to support loads of different sizes on its flanged bed which is rigid in any of its adjusted positions.
Inventors
- 👤 J Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
B; B62; B62D; B62D21/00; B62D21/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
In a truck: a main elongated frame; first and second support means for the frame, the first comprising two laterally spaced supporting elements and the second comprising at least one supporting element longitudinally spaced from the first, so that the main frame has at least three-point support for stability; a bed frame, the bed frame having one laterally extending member fixedly mounted on the main frame, and side frames supported on the laterally extending member and on the laterally spaced supporting elements, the bed frame including at least one extension frame, the bed frame and extension frame having elongated slide-track interengagement above and below with one of the said frames sliding between upper and lower parts of the other, whereby the extension frame can slide out from the main frame and yet be confined to linear displacement.
Claim 2
Dependent Claim
137 words
In a truck: a main elongated frame; first and second support means for the frame, the first comprising two laterally spaced supporting elements and the second comprising at least one supporting element longitudinally spaced from the first, so that the main frame has at least three-point support for stability; a bed frame, the bed frame having one laterally extending member fixedly mounted on the main frame, and side frames supported on the laterally extending member and on the laterally spaced supporting elements, the bed frame including at least one extension frame, the bed frame and extension frame having elongated slide-track interengagement above and below with one of the said frames sliding between upper and lower parts of the other, whereby the extension frame can slide out from the main frame and yet be confined to linear displacement.
Claim 3
Dependent Claim
137 words
In a truck: a main elongated frame; first and second support means for the frame, the first comprising two laterally spaced supporting elements and the second comprising at least one supporting element longitudinally spaced from the first, so that the main frame has at least three-point support for stability; a bed frame, the bed frame having one laterally extending member fixedly mounted on the main frame, and side frames supported on the laterally extending member and on the laterally spaced supporting elements, the bed frame including at least one extension frame, the bed frame and extension frame having elongated slide-track interengagement above and below with one of the said frames sliding between upper and lower parts of the other, whereby the extension frame can slide out from the main frame and yet be confined to linear displacement.
Claim 4
Dependent Claim
137 words
In a truck: a main elongated frame; first and second support means for the frame, the first comprising two laterally spaced supporting elements and the second comprising at least one supporting element longitudinally spaced from the first, so that the main frame has at least three-point support for stability; a bed frame, the bed frame having one laterally extending member fixedly mounted on the main frame, and side frames supported on the laterally extending member and on the laterally spaced supporting elements, the bed frame including at least one extension frame, the bed frame and extension frame having elongated slide-track interengagement above and below with one of the said frames sliding between upper and lower parts of the other, whereby the extension frame can slide out from the main frame and yet be confined to linear displacement.
Claim 5
Dependent Claim
34 words
In the truck of claim 1: the laterally spaced supporting elements of the first support means comprising two wheels and axle means therefor, the axle means being firmly fixed to the elongated main frame.
Claim 6
Dependent Claim
52 words
In the truck of claim 2: the extension frame being a side frame, the track interengagement being with the laterally extending member fixed to the main frame, and it also having sliding support on axle means, whereby it has sliding support on the main frame and additional support on the axle means.
Claim 7
Dependent Claim
32 words
In the truck of claim 1: the bed frame having horizontal and vertical portions, the horizontal portions being adapted to support a load and the vertical to restrain it against lateral movements.
Claim 8
Dependent Claim
57 words
In the truck of claim 1: the extension frame being an end frame, and having the sliding interengagement lengthwise of the main frame, whereby to change the length of the bed frame, the laterally extending member on the bed frame and the extension frame having horizontal support portions that are disposed near opposite ends of the truck.
Claim 9
Dependent Claim
50 words
In the truck of claim 5: the side frames having transverse portions with the same slide track type of interengagement with the laterally extending member, and having sliding interengagement with the axle means, whereby they can be slid in or out laterally to change the width of the bed frame.
Claim 10
Dependent Claim
56 words
In the truck of claim 6: additional extension frames, one on each side, said additional extension frames having the same type slidable track interengagement with the side frames, whereby to change the lengthwise dimensions of the side frames, and having inwardly extending end portions to slidably engage and be supported by the horizontal support portion thereof.
Claim 11
Dependent Claim
26 words
In the truck of claim 7: the bed frame including members to provide the same elevation for the underparts of loads supported on the bed frame.
Claim 12
Dependent Claim
62 words
In the truck of claim 5, the main frame comprising an elongated rigid member having a non-circular groove therein, and a rod mounted rigidly over the groove and providing a track-slot between them; the extension frame having an elongated member complementary in shape to the groove and slidable lengthwise in the groove, the non-circular groove restricting twisting movement of the extension frame.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |