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:
Jun. 20, 1989
Filed:
Feb. 27, 1987
Applicant:
Inventor:
Roger A Bullivant, Burton-on-Trent, GB;
Assignee:
Roger Bullivant of Texas, Inc., Grand Prairie, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
405241 ; 175 20 ; 175 21 ; 405232 ; 405240 ;
Abstract
A soil displacement tool, or mole, comprises a hollow cylindrical body in which is provided an hydraulically reciprocal piston the movement of which drives the tool through the soil to form a hole, the body and piston being annular such that the tool is hollow.