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Collapsible hand truck
| Details |
Inventors: vom Braucke, Manfred; vom Braucke, Hans;
Assignee: Bielefelder Kuchenmaschinen- und Transportgerate-Fabrik (Bielefeld, DE)
Primary Examiner: Mitchell; David M.
Assistant Examiner:
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis
A hand truck comprises a frame having upper and lower frame parts which can be pivoted between folded and unfolded positions. Pivotable locks retain the frame parts in both such positions. A pair of wheel braces are attached to the lower frame part for rotation between folded and unfolded positions. A carrier member is mounted to the lower frame part for rotation between folded and unfolded positions. The carrier member locks the wheel braces in their unfolded positions. The wheel braces carry tires which frictionally engage the carrier member to retain the wheel braces in their folded positions. The portion of the lower frame part which carries the wheel braces and carrier member can be separated from the lower frame part and then rotated ninety degrees before being reattached to the lower frame part in a stored condition. |
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DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION FIGS.
1 to 4 show a first embodiment of the hand truck or barrow, with a vertical frame 10, running gear 20 and load holding means 30 in the unfolded working position (FIGS.
1, 2) and in the folded transport position (FIGS.
3, 4).
The vertical frame 10 comprises a lower frame part 10' and an upper frame part 10", articulated to each other in a manner such that upper profiles or profile tubes 11" of the upper frame are pivoted to the inside of lower profiles or profile tubes 11', whereby the upper frame part 10" may be folded into a space bordered by the lower frame part 10' around a pivot axis S3 (see FIG.
4).
A cross-stay 12 connects the two upper long profiles 11" and forms a grip handle of the vertical frame.
The articulation of the upper frame part 10" on the lower frame part 10' is secured by lock catches 14 which, as will be later described, are able to rotate around pivot axes S4 and immobilize the profiles 11', 11" selectively in the unfolded and folded positions (FIGS.
1, 4).
The lower ends of the upper profiles 11" are interconnected by a cross bar 16, which is located coaxially relative to the pivot axis S3.
At the lower end of the lower frame part 10' the running gear 20 is located.
The lower ends of the lower profiles 11' are interconnected by a cross bar 27, the outward ends 27' of which are bent to be parallel to the lower ends of the lower profiles 11'.
These bent ends 27' hold pivot bushings 24 for the wheel braces 21, with the wheel braces 21 being equipped with wheels 23 rotatable around an axle D.
The wheels 23 are advantageously equipped with tires 23' to improve the rolling behavior and to absorb shocks.
Each of the bushings 24 of the wheel braces 21 is rotatable around a pivot axis S1 defined by a respective bent end 27', so that it may be unfolded to the working position (FIG.
1, 2) and folded into the rest position (FIGS.
3, 4).
In the folded position the bushings and wheels are located within the confines of a receiving space formed essentially by the crossbar 27 and lying in the plane of the frame 10
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