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:
Jul. 28, 1987
Filed:
Sep. 26, 1986
Steven M Rudolph, David City, NE (US);
Donald J Maxwell, Lincoln, NE (US);
Eidos Corporation, David City, NE (US);
Abstract
Twin linkage assemblies shift a support platform between a low profile, fully collapsed position and a fully extended position of a height suitable for supporting a workman underneath an aircraft or for supporting, for instance, an engine at a comfortable working position. A hydraulic cylinder and piston assembly is connected at opposite ends to swivel members and torque arms, the latter of which are connected to short links which in turn are coupled to linkages interconnecting a base and the work supporting platform. The torque arms, in cooperation with the swivel members, facilitate swinging of the links and linkages to reduce the force necessary to separate the platform and base to a value smaller than would otherwise be required. In preferred embodiments, opposite end regions of the cylinder and piston are provided with trunnions that carry the swivel members and which engage stops mounted to the platform and base, to resist rotational urging of the piston and cylinder assembly and to assist the torque arms in swinging the links and associated linkages both when the assembly is collapsed and when the assembly is extended.