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:
May. 06, 1980
Filed:
Apr. 27, 1978
Applicant:
Inventor:
John R Muntjanoff, Aurora, IL (US);
Assignee:
Caterpillar Tractor Co., Peoria, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66C / ;
U.S. Cl.
CPC ...
414730 ; 60420 ; 91518 ; 294 88 ;
Abstract
A grapple tong system has first and second hydraulic lines for closing and raising the grapple tongs, respectively. A hydraulic system is provided for automatically, controllably passing fluid from the second to the first line in response to a preselected pressure in the first line and a higher pressure in the second line for automatically, controllably urging the grapples to a closed position.