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:
Mar. 21, 1978
Filed:
Nov. 03, 1976
Applicant:
Inventor:
Frank A Hollingshead, Houston, TX (US);
Assignee:
Reed Tool Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408 60 ; 175340 ; 239600 ; 285404 ;
Abstract
A rotary drill bit having a plurality of journal-mounted rotating cutters and jet passageways through which drilling fluid is discharged between the cutters is provided with removable nozzles for air or other drilling fluid. The nozzles are provided with a peripheral groove and secured in place in said passageways by the divided ends of a bifurcated retaining pin.