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. 06, 1993
Filed:
Jun. 26, 1991
Applicant:
Inventor:
Charles A Harris, Evansville, IN (US);
Assignee:
Babcock Industries, Inc., Fairfield, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
B60B / ;
U.S. Cl.
CPC ...
16 21 ; 16 20 ; 16 3 / ;
Abstract
A caster assembly has a stem and ball bearing retainer made of a single homogeneous unit of reinforced plastic, a horn made of a single piece of reinforced plastic, a bottom bearing retainer made of a single piece of reinforced plastic, an upper set of ball bearings between the horn and the upper retainer, a lower set of ball bearings between the horn and the bottom retainer, with the bottom retainer being ultrasonically welded to the unitary stem and retainer.