US4275894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand truck construction assembly
Assignee: Magline Inc
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Filing: 1978-10-24
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Granted: 1981-06-30
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Expires: 1998-10-24
Abstract
Abstract A hand truck having a wheeled upright frame is provided at its lower end with a load-supporting nose member swingable between raised and lowered positions, the nose member being biased to its raised position and provided with detent means for releasably latching the nose member in its lowered position. The nose member is pivoted to the upright frame in such manner that when the nose member is in its lowered, load-supporting position the nose member abuts and is supported by the upright frame member, thereby reinforcing the nose member without the need for external bracing. The upright frame carries an extensible and retractable sub-frame to enable the truck to be used for transporting loads of greatly varying height.
Inventors
- 👤 Carl N. Mortenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:44
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/10; B62B1/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A hand truck construction comprising an upright frame member; a load-supporting nose connected to said frame member at its lower end; a sub-frame member carried by said frame member for movements from a retracted position to an extended position in prolongation of said frame member, and return; cooperable latch means carried by said frame member and said sub-frame member for limiting movement of the latter in a direction in prolongation of said frame member; and resilient means carried by one of said members and engaging the other of said members for yieldably maintaining said sub-frame member in a selected position of adjustment relative to said frame member, said resilient means comprising an angular spring arm having a knee engaging said other of said members.
Claim 2
Dependent Claim
124 words
A hand truck construction comprising an upright frame member; a load-supporting nose connected to said frame member at its lower end; a sub-frame member carried by said frame member for movements from a retracted position to an extended position in prolongation of said frame member, and return; cooperable latch means carried by said frame member and said sub-frame member for limiting movement of the latter in a direction in prolongation of said frame member; and resilient means carried by one of said members and engaging the other of said members for yieldably maintaining said sub-frame member in a selected position of adjustment relative to said frame member, said resilient means comprising an angular spring arm having a knee engaging said other of said members.
Claim 3
Dependent Claim
34 words
A construction according to claim 1 wherein said latch means comprises an abutment on one of said members and means carried by the other of said members in a position to engage said abutment.
Claim 4
Dependent Claim
14 words
A construction according to claim 2 wherein said abutment is on said sub-frame member.
Claim 5
Dependent Claim
46 words
A construction according to claim 1 wherein said upright frame member has an upper end crossbar and said sub-frame is mounted for sliding bearing engagement therewith so that the said crossbar functions both as a handlebar and as a load bearing support for the extended sub-frame.
Claim 6
Dependent Claim
128 words
A hand truck construction comprising an upright frame member having upper, lower, forward and rearward ends; a load supporting nose member carried by said frame member adjacent its lower end; ground engaging wheels mounted on said frame member adjacent its lower end; a pair of body members each having a rearward surface and parallel grooves adjacent its rearward surface; means mounting each of said body members on said frame member adjacent opposite sides thereof with said body members extending rearwardly of said frame member; and a smooth surface wear strip fitted to each of said body members, each of said wear strips being C-shaped and having flanges which may be slid into the grooves of the associated body member, said grooves terminating at one end in an abutment.
Claim 7
Dependent Claim
128 words
A hand truck construction comprising an upright frame member having upper, lower, forward and rearward ends; a load supporting nose member carried by said frame member adjacent its lower end; ground engaging wheels mounted on said frame member adjacent its lower end; a pair of body members each having a rearward surface and parallel grooves adjacent its rearward surface; means mounting each of said body members on said frame member adjacent opposite sides thereof with said body members extending rearwardly of said frame member; and a smooth surface wear strip fitted to each of said body members, each of said wear strips being C-shaped and having flanges which may be slid into the grooves of the associated body member, said grooves terminating at one end in an abutment.
Claim 8
Dependent Claim
61 words
A construction according to claim 5 wherein said frame member comprises a pair of channel shaped rails having parallel sides, and wherein the mounting means for each of said body members comprises a part fitted between the sides of the associated rail and clasp members carried by such body member and embracing said part and a portion of said associated rail.
Claim 9
Dependent Claim
80 words
A construction according to claim 5 in which the opposite ends of said body members are formed with endwise projecting tongues of a width no greater than the space between said grooves so that the wear strip flanges will slide over it; and in which mating abutting end caps fit over each tongue and form an opposite shoulder for holding each insert in position; and fastener means is provided for holding the end caps in assembled position on the tongues.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |