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:
Aug. 06, 1996
Filed:
Feb. 03, 1994
Applicant:
Inventor:
Ron R Karani, Chagrin Falls, OH (US);
Assignee:
NPK Construction Equipment, Inc., Walton Hills, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23D / ;
U.S. Cl.
CPC ...
30134 ; 30228 ;
Abstract
A heavy duty shear attachable to the boom of an excavator comprises a fixed lower jaw and a movable upper jaw driven by a hydraulic cylinder. To overcome jams, the cylinder is provided with hydraulic fluid at a higher pressure in the open direction than in the close direction.