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. 19, 1993
Filed:
Jun. 12, 1991
Donald J McCarthy, deceased, late of Hayward, CA (US);
Manuel Pastor, Berkeley, CA (US);
ETEC Systems, Inc., Hayward, CA (US);
Abstract
A linear bearing assembly comprising sets of guides (ways) for guiding rolling elements (ball bearings or rollers) constrained within a cage. Typically, two sets of rolling elements and cages are used between a moving part and a stationary part. Each set has four resilient elements (springs) with one end of each spring anchored to the cage and with the other ends of two springs anchored to the stationary way or part and the other ends of the other two springs are anchored to the movable way or part. This arrangement provides a restoring spring force that gradually forces the cage to its correct tracking position. If the cage is tracking properly, the spring forces cancel out and there is no inherent rubbing in the restoring mechanism.