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:
Apr. 02, 1985
Filed:
Aug. 30, 1982
John J Tuss, Englewood, OH (US);
The Warner & Swasey Company, Cleveland, OH (US);
Abstract
A coordinate measuring machine (10) having a vertically movable probe (41) supported from the bottom of a probe arm (42), the weight of which is offset by an improved pneumatic counterbalance (50). The pneumatic counterbalance is adapted to use a source of pressurized air acting upon a spherical piston (54) which is connected to probe arm (42). Spherical piston (54) fits with a close tolerance in cylinder (52). A rigid bracket (58) is connected to the top of probe arm (42). Piston rod (56) connects spherical piston (54) to a spherical bearing (53) in rigid bracket (58). A precision pressure regulator (70) having a relatively small capacity is provided to insure only a small change in the counterbalance force as the spherical piston (54) moves within cylinder (52). Regulator (70) is adjusted to provide make up air for the air which leaks past spherical piston (54).