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:
May. 30, 1989
Filed:
Sep. 18, 1986
James G Boyko, Amesbury, MA (US);
George E Brackett, Cape Elizabeth, ME (US);
Maxaxam Corporation, Dover, DE (US);
Abstract
In a worm wheel for a roller worm drive, each roller is movable along its axis relative to the body of the wheel, and biased towards an extended position by a spring. The springs are mounted in the space between inboard and outboard bearings associated with each roller, so as to conserve room within the roller wheel and hence permit use of large, robust, anti-friction bearings. In particularly preferred arrangements, the outboard anti-friction bearing can be used to limit outboard movement of each roller relative to the wheel body, and may also serve to transmit inboard-directed thrusts from the roller to the body via the biasing spring. The overall arrangement provides enhanced load carrying capacity and compactness in roller worm drives.