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:
Jan. 28, 2003
Filed:
Feb. 04, 2000
Applicant:
Inventor:
Franz-Josef Puttmann, Lennestadt, DE;
Assignee:
Tracto-Technik-Paul Schmidt Spezialmaschinen, Lennestadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
E21B 4/06 ;
U.S. Cl.
CPC ...
E21B 4/06 ;
Abstract
In the case of an earth boring apparatus, preferably a thrust boring apparatus, the head of which is actuated by a pneumatically operated reciprocating ram, a supply hose ( ) provides the connection from a compressor as an example to the thrust boring apparatus which also serves to reverse the direction of operation by the rotation of the hose. To ensure error-free control over greater lengths of hose and to avoid kinking—partly due to the pressure from surrounding ground—the hose ( ) is equipped with a snugly fitting corset ( ) in the form of a spring wire spiral or a woven wire support.