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:
Dec. 23, 1986
Filed:
Nov. 05, 1984
Applicant:
Inventor:
Bertel S Nelson, Naperville, IL (US);
Assignee:
Wedgtrac Corporation, Yorkville, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ; F16H / ; F16H / ;
U.S. Cl.
CPC ...
74425 ; 74458 ;
Abstract
A worm and meshing worm gear are provided. The worm has a central cylindrical portion, and tapered portions at either end thereof. The angle of taper of the two tapered portions is the same, but in different directions. The angle of taper is substantially equal to 360 degrees divided by the number of teeth in the worm gear. Contact between the worm and gear occurs over three times the number of teeth in which contact is obtained with a conventional cylindrical worm. The worm is capable of being formed by thread rolling.