Patent US4448434A successfully refreshed from Google Patents.
US4448434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible hand truck
Assignee: Individual
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Filing: 1981-12-30
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Granted: 1984-05-15
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Expires: 2001-12-30
Abstract
Abstract The collapsible hand truck disclosed includes a pair of spaced-apart, segmented, upright frame members, their segments each being pivotly connected to a "U" bracket; The upright frame members each having a handle and a wheel at opposite ends; The handles and wheels extending in the same direction from the upright members; A load-carrying bracket is rotatably connected between the upright members near the handle ends; Brace members are rotatably connected to the upright members between the "U" bracket and wheel ends; and A weight support bracket is rotatably and pivotly connected between the upright frame members and when in an operable position extends outwardly from the upright frame members on the opposite side from the handles and wheels.
Inventors
- 👤 Milan B. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:43
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/10; B62B1/12; B62B2202/00; B62B2202/22; B62B2205/00; B62B2205/12; Y; Y10; Y10S; Y10S224/00; Y10S224/915
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
205 words
An improved collapsible hand truck comprising: a pair of side-by-side, spaced-apart, segmented, upright members, each of the segments of each upright member are pivotally attached in a spaced-apart relationship to a common "U" bracket and each upright comprises a handle member formed on one end thereof, extending at an angle therefrom and a wheel rotatably attached near the end remote from said handle member and extending therefrom in a direction of the distal end of said handle member, whereby said handle member and wheel lie along a common plane and the open portion of said "U" bracket is perpendicular to said common plane; a load-carrying bracket positioned between and rotatably attached to the upright members adjacent the handle member end thereof; a weight support shelf member rotatably attached to the upright members at their wheel adjacent ends; brace members extending between said upright members intermediate said common "U" bracket and said wheels, said upright members are rotatable relative thereto; and a pair of levers pivotally interconnected intermediate their ends, each of said levers being pivotally attached at one end to said brace members and at their opposite end to said weight support shelf member intermediate the upright member attachment and its opposite outer end surface.
Claim 2
Dependent Claim
205 words
An improved collapsible hand truck comprising: a pair of side-by-side, spaced-apart, segmented, upright members, each of the segments of each upright member are pivotally attached in a spaced-apart relationship to a common "U" bracket and each upright comprises a handle member formed on one end thereof, extending at an angle therefrom and a wheel rotatably attached near the end remote from said handle member and extending therefrom in a direction of the distal end of said handle member, whereby said handle member and wheel lie along a common plane and the open portion of said "U" bracket is perpendicular to said common plane; a load-carrying bracket positioned between and rotatably attached to the upright members adjacent the handle member end thereof; a weight support shelf member rotatably attached to the upright members at their wheel adjacent ends; brace members extending between said upright members intermediate said common "U" bracket and said wheels, said upright members are rotatable relative thereto; and a pair of levers pivotally interconnected intermediate their ends, each of said levers being pivotally attached at one end to said brace members and at their opposite end to said weight support shelf member intermediate the upright member attachment and its opposite outer end surface.
Claim 3
Dependent Claim
44 words
The invention as defined in claim 1 additionally comprising a pair of brackets at least one rotatably attached at a fixed location to each of said upright members intermediate said load carrying bracket and said "U" bracket for rotation relative to said common plane.
Claim 4
Dependent Claim
61 words
The invention as defined in claim 2 wherein the upper surface of each bracket of said pair of brackets includes an elongated member for nesting therewith, said elongated member is pivotally attached to the distal end of an upper surface bracket whereby the elongated members distal end is free to rotate with respect to the upper surface of its associated bracket.
Claim 5
Dependent Claim
39 words
The invention as defined in claims 2 and 3 further comprising a first locking means for locking said pair of brackets in a first position parallel to said handle members and wheels and in a second position perpendicular thereto.
Claim 6
Dependent Claim
30 words
The invention as defined in claim 1 further comprising locking means for locking the rotation of said upright members with respect to said load-carrying bracket, brace members and weight-supporting shelf.
Claim 7
Dependent Claim
19 words
The invention as defined in claim 1 additionally comprising means for attaching elongated pole members to said upright members.
Claim 8
Dependent Claim
22 words
The invention as defined in claim 2 additionally comprising locking means for locking the pivotly interconnected levers in their maximum extended position.
Claim 9
Dependent Claim
29 words
The invention as defined in claim 3 wherein a soft container is positioned between said pair of brackets in an open condition and locked thereto by said elongated member.
Claim 10
Dependent Claim
43 words
The invention as defined in claim 1 wherein said "U" bracket locks the segments of said upright members in their extended position when rotated to a first position and allows said segments to pivot toward each other when rotated to a second position.
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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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |