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. 30, 1989
Filed:
Nov. 18, 1987
Jerry D Fidler, East Peoria, IL (US);
John J Krone, Dunlap, IL (US);
Michael A Roussin, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
Impact rippers are useful for ripping solid rock. The service life of the impactor can be extended if the impactor is operated only when the ripper shank is loaded sufficient to transmit the impact energy into the material being ripped. The subject control system uses control signals generated by a plurality of signal generating means when the ripper shanks are loaded above a predetermined level to control the operation of the hydraulically actuated impactors associated with such ripper shanks. The number of control signals being generated is also used to control the volume of fluid made available for use by the impactors being operated at an given time to control the operating speed thereof. Thus, only the impactor(s) associated with a ripper shank(s) loaded above the predetermined level is operated thereby avoiding non-productive and harmful impactor operation if the ripper shank(s) is not sufficiently loaded.