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:
Mar. 01, 1977
Filed:
Oct. 16, 1975
Applicant:
Inventor:
Douglas M Johnson, Waconia, MN (US);
Assignee:
Fluoroware, Inc., Chaska, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B / ;
U.S. Cl.
CPC ...
294 33 ; 81 43 ; 294 / ;
Abstract
Wafer tongs for grasping semiconductor wafers and the like are provided with a pair of jaws and at least one wafer-contacting stop limiting the reach of the jaws onto the surface of a wafer from the wafer edge. The stops may take the form of jaw guides which extend from one jaw towards the other to maintain alignment of the jaws. In one embodiment, the guides are carried by a clip movably attached to one jaw for forward or rearward movement thereon to adjust the reach of the jaws onto a wafer. The forward ends of the jaws may be resilient so as to engage and flatten against surfaces of the wafer to improve the grip of the jaws and reduce wafer breakage.