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. 27, 1990
Filed:
Jun. 28, 1989
Ernest A Benway, Mentor, OH (US);
Thomas J Gardner, Kirtland, OH (US);
Cajon Company, Macedonia, OH (US);
Abstract
A clamping device for holding cylindrical workpieces having a nominal radius R which varies from a minimum of (R-A) to a maximum of (R+B), where A and B are the limits of the tolerance range for the nominal radius, includes opposed clamp halves each having a clamp face adapted to be moved toward and away from one another and each of the clamp halves carrying a rigid collet element adapted to engage on opposite sides of cylindrical workpieces when the clamp halves are moved toward one another. Each of the collet elements has a semi-cylindrical clamping surface extending inwardly from the clamp face of the respective clamp half. Each semi-cylindrical clamping surface has a radius substantially equal to (R+B) with the center of the radius being offset outwardly of the clamp face of the respective clamp half an amount at least equal to (A+B). Preferably, the center of the radius is offset an amount at least equal to (A+B+C), where C is the tolerance deviation permitted to the radius (R+C). Additionally, each clamping surface is comprised of individual surface portions mounted for independent flexing movement to allow the collet to further compensate for workpiece tolerance variations.