Patent US4512591A successfully refreshed from Google Patents.
US4512591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand truck
Assignee: Individual
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Filing: 1982-07-06
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Granted: 1985-04-23
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Expires: 2002-07-06
Abstract
Abstract The disclosure herein describes a hand truck which comprises a base frame defined by side members and front and rear end members and into which may be compactly stored various components mountable to the base frame such as a handle, four uprights, a pair of bed plates and support elements for the bed plates; the base frame is equipped in one case, with supporting mounts for inclining two uprights relative to the base frame and, in another case, of an opening at each corner for mounting the four uprights to which are attached the support elements cooperating with the bed plates to form platforms which may be formed at various heights relative to the base frame.
Inventors
- 👤 Jean-Paul Plante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:31
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/002; B62B3/007; B62B3/02; B62B2205/00; B62B2205/006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
A hand truck comprising, in combination: (a) a substantially rectangular base frame defined by a pair of longitudinal side members and front and rear end members, said members being fixed in a horizontal plane; (b) a handle adapted for connection to said front end member; (c) four uprights each adapted for mounting in an opening provided at each corner of said base frame; (d) a pair of support elements adapted for mounting to said uprights vertically above said side members; (e) platform means adapted for support on said support elements; (f) supporting mounts secured to said front and rear end members for receiving two of said uprights in an inclined plane relative to the plane of said base frame; and (g) means for compactly storing in said base frame said handle, said uprights, said support elements and said platform means comprising a pair of parallel facing L-shaped cross-members secured to the underside of said side members and slidably receiving said platform means sideways therein.
Claim 2
Dependent Claim
164 words
A hand truck comprising, in combination: (a) a substantially rectangular base frame defined by a pair of longitudinal side members and front and rear end members, said members being fixed in a horizontal plane; (b) a handle adapted for connection to said front end member; (c) four uprights each adapted for mounting in an opening provided at each corner of said base frame; (d) a pair of support elements adapted for mounting to said uprights vertically above said side members; (e) platform means adapted for support on said support elements; (f) supporting mounts secured to said front and rear end members for receiving two of said uprights in an inclined plane relative to the plane of said base frame; and (g) means for compactly storing in said base frame said handle, said uprights, said support elements and said platform means comprising a pair of parallel facing L-shaped cross-members secured to the underside of said side members and slidably receiving said platform means sideways therein.
Claim 3
Dependent Claim
36 words
A hand truck as defined in claim 1, wherein said storing means for said uprights and said support elements consist of a pair of cross-members secured to said frame adjacent said front and rear end members.
Claim 4
Dependent Claim
33 words
A hand truck as defined in claim 2, wherein said storing means for said support elements further include slot means in said end members for receiving therein the extremities of said support members.
Claim 5
Dependent Claim
33 words
A hand truck as defined in claim 1, 2 or 3, wherein said storing means for said handle consist of engagement means on said supporting mounts for receiving opposite extremities of said handle.
Claim 6
Dependent Claim
25 words
A hand truck as defined in claim 1, 2 or 3, comprising attachment means on said front end member for removably connecting said handle thereto.
Claim 7
Dependent Claim
38 words
A hand truck as defined in claim 1, wherein said uprights include a series of vertically spaced slots to receive opposite extremities of said support elements when said uprights are mounted at the corners of said base frame.
Claim 8
Dependent Claim
46 words
A hand truck as defined in claims 1 or 6, further comprising rod means adapted for connection to said uprights and spaced vertically from said front and rear end members; said rod means being storable in supports mounted to at least one of said L-shaped cross-members.
Claim 9
Dependent Claim
60 words
A hand truck as defined in claim 1, wherein said platform means consist of a pair of bed plates with edges adapted to sit in said support elements; said bed plates being adapted to be fixed to said side members and said front and rear end members when said handle, uprights and support elements are stored in said base frame.
Claim 10
Dependent Claim
22 words
A hand truck as defined in claim 1, 2 or 3, comprising a swivel caster at each corner of said base 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) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |