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:
Nov. 17, 1981
Filed:
Oct. 12, 1979
Robert F Urbanic, Mentor, OH (US);
PMC Industries, Inc., Wickliffe, OH (US);
Abstract
A centering and self-adjusting chuck for clamping stock includes at least three circumferentially spaced dependent jaws that initially are displaced by being simultaneously radially inwardly driven equal distances under low pressure to center the stock positioned therebetween and further includes at least three other circumferentially spaced independent jaws that are then independently displaced by being radially inwardly driven under low pressure any distance required to have each such independent jaw engage the centered stock, the dependent and independent jaws finally being displaced by being simultaneously radially inwardly driven under higher pressure tightly and uniformly to clamp the stock therebetween for subsequent machining.