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:
Dec. 14, 1993
Filed:
May. 08, 1992
Applicant:
Inventor:
Jack B Ottestad, La Jolla, CA (US);
Assignee:
ESCO Corporation, Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25D / ; E02F / ;
U.S. Cl.
CPC ...
173200 ; 173206 ; 173128 ; 91229 ; 299 37 ;
Abstract
An impact device for breaking up and separating hard material comprises an actuating system for providing a faster cycle rate as well as an increased impact force. More specifically, the device includes a pair of pistons movably arranged in a cylinder to cooperate in compressing the gaseous component prior to initiating the blow. A closed tube is provided to fluidly interconnect opposite chambers adjacent the two pistons to coordinate the different movements of the pistons to effect the desired compression. The impact device is particularly well suited for use in an impact bucket.