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. 24, 1990
Filed:
Oct. 10, 1989
Applicant:
Inventors:
Louis W Johnson, Eugene, OR (US);
Bruce G Johnson, Eugene, OR (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241215 ; 241216 ;
Abstract
A first annular seal member on the base of a gyratory rock crusher is associated with a second annular seal member on the crusher cone. These two seal members have cooperating spherical surfaces which rub slidably together in the gyratory movements. An air sealing chamber is formed by the sealing members and other portions of the crusher and is associated with an annular groove in the first seal member having an inlet with a forced air system in an arrangement wherein air currents intercept dust moving along the spherical surfaces and also carry such dust away from inner portions of the crusher.