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:
Jan. 01, 1980
Filed:
Mar. 13, 1978
John R Weber, Chillicothe, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A rotary mechanism having improved seal life including a housing defining an operating chamber having a wall configuration based on a desired geometrical shape which is an n order harmonic curve where n is an integer of 1 or more, a shaft journalled in the housing and having an eccentric within the chamber, and a rotor within the chamber and journalled on the eccentric and having a working surface based on the desired geometric shape and which is an n+1 order harmonic curve to define n+1 equally angularly spaced apexes or noses on the surface. n+1 seals are carried by the rotor, one at each apex or nose and timing gearing interconnects the rotor and the housing to establish relative rates of rotation between the housing, the shaft and the rotor. The chamber wall further is defined by an n+1 harmonic curve superimposed on the n order harmonic curve which minimizes relative movement between the seal and the rotor to improve the life of the seals.