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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.:

US 5174387 B1

PDFFull Text
Date of Patent:
Dec. 29, 1992

Filed:

Nov. 20, 1991

Method and apparatus for adapting the operational behavior of a

Applicant:
Inventors:

Friedrich K Arndt, Essen, DE;

Robert-Jan Bartels, Essen, DE;

Heribert Vielhaber, Essen, DE;

Assignee:

Krupp Maschinentechnik Gesellschaft mit beschrankter Haftung, Essen, DE;

Attorney:

Spencer, Frank & Schneider

Primary Examiner:

Frank T Yost

Assistant Examiner:

Scott A Smith

Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
173-1 ; 173-2 ; 173176 ; 173206 ; 91300 ; 91321 ; 175 27 ;
Abstract

A control system for a hydraulic percussion mechanism (6) is based on the continuous measurement of the striking rate (z) of the striking piston, or on the continuous measurement of the striking rate (z) of the striking piston together with the quantity per unit time (Q.sub.e) of the hydraulic driving medium coming into the percussion mechanism (6). One, or possibly both, of these parameters is measured from outside the percussion mechanism itself. The control system is configured in such a way that the internal resistance of the percussion mechanism or the hydraulic pump which powers it is increased if there is an increase in the striking rate (z) or the ratio z/Q of the striking rate to the incoming stream rate beyond respective limit values.

Find Patent Forward Citations

Arndt, Friedrich. (1992). Method and apparatus for adapting the operational behavior of a (U.S. Patent No. 5174387). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5174387

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