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. 25, 2011
Filed:
Apr. 10, 2006
Franz-josef Püttmann, Lennestadt, DE;
Gerhard Balve, Lennestadt, DE;
Franz-Josef Püttmann, Lennestadt, DE;
Gerhard Balve, Lennestadt, DE;
Tracto-Technik GmbH, Lennestadt, DE;
Abstract
A pneumatically reversible ram boring device includes a percussion piston () that is situated in a casing () and is movable back and forth by operation air supplied via an operational-air supply via an operational-air line (), a control pipe () having at least one control opening (), an outer pipe (), and a control sleeve () that can be displaced by compressed air from a control chamber (). An essentially torsion-resistant operational-air line () can be rotatably connected to a rotary valve () that supplies the control chamber with operational air or vents air from the chamber.