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:
Dec. 07, 1999
Filed:
Mar. 23, 1998
Applicant:
Inventor:
Douglas A Lund, Anacortis, WA (US);
Assignee:
Team Corporation, Burlington, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73662 ; 73665 ;
Abstract
A hydraulic actuator for vibration testing equipment includes a double-acting piston having a coaxial floating piston assembly coupled to one end of the piston rod. The floating piston assembly has a preload piston pressurized to allow the overall length of the actuator to adjust for small changes in distance between the mating surfaces of the vibration test equipment when the equipment tilts or rotates.