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:
Oct. 09, 1984
Filed:
Jan. 31, 1983
Richard D Beck, Salem, OR (US);
Other;
Abstract
A liquid operated motor assembly has an exterior housing arranged to be driven rotatably by fluid pressure. The exterior housing has a cutter at its leading end which is dimensioned and arranged to clear a path through a pipe at least as large in cross section as trailing portions of the motor assembly. The motor assembly is connected at its trailing end to radially expandable links arranged when expanded to engage the inner surface of a pipe and stabilize the position of the motor assembly and arranged when retracted to allow retrieval of the tool through a bore made by the cutter. Operation of the expanding links is accomplished by a fluid operated cylinder assembly in the same circuit as the motor whereby to be expanded when the motor is in operation. Fluid supply for the motor includes forwardly directed orifices that clean debris away from the front of the tool. The discharge outlet for the motor is located within the cutter housing so that discharged fluid cools the cutter.