Patent US4458906A successfully refreshed from Google Patents.
US4458906A
Expired / Lapsed
US
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Platform hand truck
Assignee: LOCKWOOD MANUFACTURNG Co
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Filing: 1981-08-24
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Granted: 1984-07-10
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Expires: 2001-08-24
Abstract
Abstract A platform hand truck having a molded thermoplastic deck cover with an integrally molded bumper extending about the periphery of a metal deck. An interchangeable handle is disclosed that may be attached to either the pivot end of the turning end of the truck.
Inventors
- 👤 Frederick W. Lamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:36
CPC Classifications
B; B62; B62B; B62B3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
An improved platform truck of the type including a planar load bearing deck having a subtantially flat top and vertical side edges, a plurality of wheels depending from the bottom of the load bearing deck and a handle means extending upwardly from one end of said load bearing deck for exerting a motive force upon said platform truck wherein the improvement comprises: a cover overlyingly attached to the load bearing deck including an integrally formed resilient bumper portion having a free bottom edge which is laterally flared outwardly from a peripheral edge of the cover in spaced relation to the vertical edges of said deck and extending downwardly from said top surface; and means for securing said cover to said load bearing deck.
Claim 2
Dependent Claim
123 words
An improved platform truck of the type including a planar load bearing deck having a subtantially flat top and vertical side edges, a plurality of wheels depending from the bottom of the load bearing deck and a handle means extending upwardly from one end of said load bearing deck for exerting a motive force upon said platform truck wherein the improvement comprises: a cover overlyingly attached to the load bearing deck including an integrally formed resilient bumper portion having a free bottom edge which is laterally flared outwardly from a peripheral edge of the cover in spaced relation to the vertical edges of said deck and extending downwardly from said top surface; and means for securing said cover to said load bearing deck.
Claim 3
Dependent Claim
68 words
The platform truck of claim 1 wherein said cover comprises a first fully-surrounding peripheral surface which overlies the peripheral side edges of the deck in the operative arrangement, said bumper portion comprising a second fully-surrounding peripheral surface having a free bottom edge and which is laterally outwardly flared from the first peripheral surface to provide a resilient bumper action, said first and second peripheral surfaces being integrally joined.
Claim 4
Dependent Claim
14 words
The platform truck of claim 1 wherein said deck cover is formed from polyethylene.
Claim 5
Dependent Claim
32 words
The platform truck of claim 1 wherein said handle means is adapted to be telescopically received by an attachment means disposed on bottom of said load bearing member at one end thereof.
Claim 6
Dependent Claim
45 words
The platform truck of claim 4 wherein a second attachment means is provided on the bottom of said load bearing member at the other end thereof, wherein said handle means is adapted to engage the attachment means at either end of the load bearing member.
Claim 7
Dependent Claim
46 words
The platform truck of claim 2 wherein open recesses are formed in the first peripheral surface of the cover perpendicular to the top thereof to firmly engage the side of said load bearing member, each recess having an opening formed therein for receiving a fastener therethrough.
Claim 8
Dependent Claim
309 words
An improved platform hand truck of the type including an elongate planar load bearing member having a turning end and a pivot end, a plurality of casters depending from the bottom of the load bearing member, a first pair of said casters being rotatable about a vertical axis and attached in spaced relationship to said turning end, and a second pair of casters being non-rotatable about a vertical axis and attached to said pivot end in spaced relationship wherein the improvement comprises: a handle having first and second aubstantially horizontally extending ends in spaced relationship to one another corresponding to the spaced relationship of said first pair of casters and said second pair of casters; means attached to the bottom of said load bearing member adjacent said first pair of casters for securing the handle ends to said load bearing member; means attached to the bottom of said load bearing member adjacent said second pair of casters for securing the handle ends to said load bearing member; first and second fasteners attached to first and second ends respectively and being adapted to releasably lock said handle to said means for securing the handle ends, whereby said handle may be alternatively attached to said turning end or said pivot end; a plastic cover disposed over said planar load bearing member and having an integrally formed bumper around the periphery thereof in free, outwardly spaced relationship to said load bearing member, said cover having first and second sides depending from peripheral edges thereof and on opposite sides thereof between and interconnecting the cover and bumper, said first and second sides being flared slightly outwardly from said edges and having a plurality of recesses formed at spaced intervals and including a hole formed therein, said hole being adapted to receive a fastener therethrough for securing the cover to said load bearing member.
Claim 9
Dependent Claim
309 words
An improved platform hand truck of the type including an elongate planar load bearing member having a turning end and a pivot end, a plurality of casters depending from the bottom of the load bearing member, a first pair of said casters being rotatable about a vertical axis and attached in spaced relationship to said turning end, and a second pair of casters being non-rotatable about a vertical axis and attached to said pivot end in spaced relationship wherein the improvement comprises: a handle having first and second aubstantially horizontally extending ends in spaced relationship to one another corresponding to the spaced relationship of said first pair of casters and said second pair of casters; means attached to the bottom of said load bearing member adjacent said first pair of casters for securing the handle ends to said load bearing member; means attached to the bottom of said load bearing member adjacent said second pair of casters for securing the handle ends to said load bearing member; first and second fasteners attached to first and second ends respectively and being adapted to releasably lock said handle to said means for securing the handle ends, whereby said handle may be alternatively attached to said turning end or said pivot end; a plastic cover disposed over said planar load bearing member and having an integrally formed bumper around the periphery thereof in free, outwardly spaced relationship to said load bearing member, said cover having first and second sides depending from peripheral edges thereof and on opposite sides thereof between and interconnecting the cover and bumper, said first and second sides being flared slightly outwardly from said edges and having a plurality of recesses formed at spaced intervals and including a hole formed therein, said hole being adapted to receive a fastener therethrough for securing the cover to said load bearing member.
Claim 10
Dependent Claim
20 words
The platform truck of claim 7 wherein said bumper is disposed about the entire periphery of said load bearing member.
Claim 11
Dependent Claim
18 words
The platform truck of claim 7 wherein said recesses are disposed perpendicular to said planar load bearing member.
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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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |