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. 01, 1988
Filed:
May. 30, 1986
James A Shelton, Modesto, CA (US);
Other;
Abstract
An improved power assisted hand truck includes a lower frame and an upper, upwardly extending, tilting frame for supporting a load in generally upright and rearwardly tilting orientations. The upper frame is tilted forward by a first hydraulic actuator mounted between the lower and upper frame portions. To stabilize the hand truck while raising the load, a stabilizer, pivotally mounted to the frame, is driven by a second hydraulic actuator mounted between the frame and the stabilizer. The first and second actuators are powered by a hand pump. Pressurizing the retract port of the second actuator causes the stabilizer to move until it contacts the ground. Continued pressurization of the retract port causes the second hydraulic actuator to pull the upper frame towards its rearwardly tilting position. The extend port of the second actuator is then pressurized slightly to cause the stabilizer to pivot away from the ground. The load is lowered by pressurizing the extend port of the first actuator.