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:
Oct. 20, 1986
Ralph M Hoffmann, Eden Prairie, MN (US);
Trochoid Power Corporation, Eden Prairie, MN (US);
Abstract
A rotary device and method for replacing apex seals is provided. The rotary device comprises a housing having a peripheral wall surface and two inner side walls that define a chamber. A rotor is located within the chamber and rotates therein. The peripheral wall surface of the housing includes a plurality of slots having disposed therein an insert, a wave spring, and an apex seal. The apex seal extends radially outward from the slot and is spring biased by the wave spring that is sandwiched between the insert and apex seal. The side walls of the housing include spring biased button seals. The button seals are urged against a portion of the apex seal. A side wall of the housing includes a rotatable nut for relieving the spring pressure on the button seal and an aperture covered by a removable cap for accessing the insert member so that it can be removed. A method of replacing the apex seals is also provided.