Two-wheel hand truck
OwnerJochum Biermainventor
Life of this patent
Estimating the term…
Abstract
A sack trolley (1) comprises a support frame (2) presenting a lower pair of carrying wheels (4) and a hoist mechanism (6) for climbing steps, which comprises a lifting arm (10) equipped with support rollers at its free end and which can be swivelled about a swivelling axis (S) parallel to the carrying wheel axis (L) by means of a crank drive (8). In order to achieve step-climbing assistance which is simple, space-saving, easy to handle and functionally safe, the lifting arm (10) is comprised of a swing guide component (11) swivel-mounted about the swivel axis (S) and a support component (12) taking up the support rollers (13) and longitudinally displaceable compared to the swivel guide component (11), whereby the crank drive (8) is articulated on the support component (12) with its crank arm (9).
Claims4
A sack trolley comprising
- (a) a support frame extending in a longitudinal direction and having an upper end and a lower end,
- (b) hand grip means at the upper end of the support frame,
- (c) a pair of carrying wheels at the lower end of the support frame, the carrying wheels being rotatable about axes extending transversely to the longitudinal direction, and
- (d) a hoist mechanism mounted on the support frame between the carrying wheels for climbing steps, the hoist mechanism comprising
- (1) a lifting arm having one end comprised of a swing guide component which may be swivelled about a swivel axis extending parallel to the axes of the carrying wheels and a support component at a free end opposite to the swing guide component, the support bracket component being longitudinally displaceable relative to the swing guide component and comprising a pair of legs and a support portion extending between the legs transversely to the longitudinal direction,
- (2) support rollers on the support bracket component, and
- (3) a crank drive comprising two crank arms linked to the legs of the support bracket component and having a crank axis arranged above the swivel axis of the swing guide component.
Dependencies are inferred from the claim text.