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US 4,046,391 AGranted
Stair climbing and descending attachment for a hand truck
AssigneeNutting Truck and Caster Company
InventorsEverett L. Restad, Roger W. Pitan
Life of this patent
Estimating the term…
Abstract
The present invention is an attachment for a hand truck. The attachment comprises two truss members welded to the hand truck and two elongated rail members, each secured to one of the truss members. The rail members each include an elongated slide of an ultra-high molecular weight polymer which provide a low-friction surface for slidably supporting the hand truck on the edge of a stair.
Claims6
A stair climbing and descending attachment for use with a hand truck to support the hand truck slidably on the edge of a stair, the attachment comprising:
- frame means for rigid attachment to the hand truck;
- and
- slide means including a low-friction material secured to said frame means for slidably engaging the stair edge;
- said slide means including a pair of elongated rail members secured to said frame means;
- each said elongated rail member including an elongated slide secured thereto, which elongated slide is comprised of said low-friction material for slidably engaging the stair edge;
- said frame means further including two truss members each having one of said elongated rail members secured thereto;
- said elongated rail members being substantially identical and each comprising two substantially identical half members, each of which is symmetrical about a plane bisecting it transversely, secured together with a face of one half member in contact with a face of the other half member to capture one of said elongated slides therebetween;
- and
- said elongated slides, each of which is symmetrical about a plane bisecting it transversely, being substantially identical.
6 more elements
Dependencies are inferred from the claim text.