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:
Apr. 09, 1991
Filed:
Dec. 08, 1989
Applicant:
Inventors:
Herbert H Mathews, Muskogee, OK (US);
Joseph L Welch, Jenks, OK (US);
Assignee:
Coburn Optical Industries, a Division of Pilkington Visioncare, Inc., Muskogee, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164334 ; 5121 / ; 425808 ; 269-7 ; 269 58 ;
Abstract
A blocking mechanism comprises a similified rotary dial mechanism and a l clamp which automatically depressurizes a molten alloy tank in response to a release of the lens clamp pressure. A lens seat is provided with a raised resilient pad to accommodate the recessed portion of a bifocal lens. The application of final lens clamping pressure cannot occur until the lens clamp contacts the lens in order to assure that an operator's finger cannot become accidentally pinched.