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. 29, 1999
Filed:
Nov. 12, 1996
Applicant:
Inventor:
Bernard Lionel Gien, Edenvale 1610, ZA;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25D / ;
U.S. Cl.
CPC ...
173 91 ;
Abstract
A down the hole drill in which a larger surface area is provided to which a greater quantity of pressure can be applied. The drill includes a piston and cylinder assembly in which the cylinder is divided in to a plurality of longitudinally extending contiguous sections, and the piston is shaped to provide together with the cylinder a drive and lifting chamber in each sections, and the air supply and exhaust provided in separate passages in a control rod which extends along a bore in the pistons, and a piston head is provided in each section.
Gien, Bernard. (1999). Down the hole drill (U.S. Patent No. 5915483). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5915483
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile