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:
Apr. 03, 2007
Filed:
Mar. 23, 2004
Applicant:
Bernard Lionel Gien, Morningside, Sandton, Gauteng Province, ZA;
Inventor:
Bernard Lionel Gien, Morningside, Sandton, Gauteng Province, ZA;
Assignee:
Other;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides a down-the-hole drill assembly having exhaust passages from upper and lower chambers past the inner end of a bit and through the body of the bit to exit through the bit face. The construction of the assembly and bit obviates a foot valve tube from the head of the bit and the disadvantages associated with this component.
Gien, Bernard. (2007). Down-the-hole drill assembly (U.S. Patent No. 7198120). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7198120
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile