US3982767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-operated pallet truck
Assignee: Marco Materialhantering AB
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Filing: 1975-06-13
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Granted: 1976-09-28
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Expires: 1995-06-13
Abstract
Abstract A hand-operated pallet truck having a single steerable ground wheel the axis of which intersects a vertical axis about which a combined wheel and jack assembly of the truck is rotatable.
Inventors
- 👤 Hans Gustav Ingvar Larsson
- 👤 Sven Gunnar Harald Stjarnovist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:33
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/04; B62B3/06; B62B3/0612; B62B5/00; B62B5/06; B62B5/063
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
A hand-operated truck having a combined wheel and jack assembly rotatable about a vertical axis and movable on a steerable wheel, a lift fork associated with and raisable and lowerable relative to said assembly by means of a hydraulic jack, support wheels raisable and lowerable in said lift fork, said wheel and jack assembly carrying a bar for pulling the truck, said bar comprising pumping means for raising the jack, said bar being pivotally mounted on the wheel and jack assembly, said bar having operating means for lowering the jack, said jack being mounted on a plate, said steerable wheel being mounted on a wheel fork which is connected to said plate the prongs of said wheel fork extending substantially obliquely downwardly and rearwardly, the axis of the steerable wheel substantially intersecting the vertical axis about which said wheel and jack assembly is rotatable.
Claim 2
Dependent Claim
144 words
A hand-operated truck having a combined wheel and jack assembly rotatable about a vertical axis and movable on a steerable wheel, a lift fork associated with and raisable and lowerable relative to said assembly by means of a hydraulic jack, support wheels raisable and lowerable in said lift fork, said wheel and jack assembly carrying a bar for pulling the truck, said bar comprising pumping means for raising the jack, said bar being pivotally mounted on the wheel and jack assembly, said bar having operating means for lowering the jack, said jack being mounted on a plate, said steerable wheel being mounted on a wheel fork which is connected to said plate the prongs of said wheel fork extending substantially obliquely downwardly and rearwardly, the axis of the steerable wheel substantially intersecting the vertical axis about which said wheel and jack assembly is rotatable.
Claim 3
Dependent Claim
24 words
A hand-operated pallet truck as defined in claim 1, wherein the wheel fork is made in an integral piece of pressed or bent metal.
Claim 4
Dependent Claim
21 words
A hand-operated pallet truck as defined in claim 1, wherein said steerable wheel is aligned with the vertical axis of rotation.
Claim 5
Dependent Claim
59 words
A hand-operated pallet truck as defined in claim 1, wherein the bar which pulls the truck is detachably mounted in a bracket hingedly mounted on the wheel and jack assembly by means of a joint bolt, said bracket having a recess for accommodating and clamping the bar and a lever arm for actuating the pump piston of the jack.
Claim 6
Dependent Claim
22 words
A hand-operated pallet truck as defined in claim 4, wherein the joint bolt is non-rotatably mounted on lugs associated with the jack.
Claim 7
Dependent Claim
122 words
A hand-operated pallet truck as defined in claim 4 wherein the operating means for lowering the jack comprises an operating lever located at the upper free end of the bar, which pulls the truck, an operating rod associated with said operating lever and passed through said bar, said operating rod extending into a recess passing transversely through the joint bolt and terminating in the region of the axis of the joint bolt, and a valve rod which has one end extending into the recess of the joint bolt from the direction opposite to the operating rod to bear in end-to-end relationship against and be acted upon by the operating rod, and the other end connected to a valve associated with the jack.
Claim 8
Dependent Claim
44 words
A hand-operated pallet truck as defined in claim 6, characterised in that the end of the operating rod terminating in the region of the axis of the joint bolt is pointed and bears in point-suspension fashion against the facing end of the valve rod.
Claim 9
Dependent Claim
36 words
A hand-operated pallet truck as defined in claim 6, characterised in that the recess of the joint bolt is sector-shaped to permit pivoting said bar and the operating rod extending therethrough relative to the joint bolt.
References Cited (Backward Citations)
FR1056722A
Cited
US3843147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |