The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 1992
Filed:
Jun. 11, 1991
Chuan Chang, Changhua, TW;
Other;
Abstract
A folding hand truck auxiliary wheel structure comprising an U-shaped auxiliary wheel frame adjustably secured to the wheel frame of a folding hand truck by a stop plate and a U-shaped spring wire to hold a pair of auxiliary wheels, wherein the U-shaped auxiliary wheel frame has a plurality of pairs of pin holes symmetrically made on the two linked, elongated rods thereof along longitudinal direction; the stop plate has two curved portions spaced from each other for fastening the two linked, elongated rods of the U-shaped auxiliary wheel frame which have each a pin hole at an inner side. The auxiliary wheels are extended out and fixedly set at a level below the wheels on the wheel frame of the folding hand truck to which the auxiliary wheel structure is attached when the two opposite ends of the U-shaped spring wire are respectively fastened through the pin holes on the stop plate into the first pair of pin holes on the U-shaped auxiliary wheel frame, or received back into an idle position when the two opposite ends of the U-shaped spring wire are fastened into the last pair of pin holes on the U-shaped auxiliary wheel frame.