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. 23, 1984
Filed:
Sep. 24, 1982
Applicant:
Inventor:
Robert F Evans, La Habra, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175 56 ; 175391 ; 175409 ;
Abstract
Harmonic resonation of cutting elements against the earth formation is impeded in a rotary drag-type drill bit by providing connection means which yieldably and resiliently support the cutting elements from the drill bit but which deflects or vibrates with different natural resonant harmonic frequencies. The different natural harmonic frequencies tend to cancel or nullify resonance of any one of the connection means. The connection means can also be externally damped against vibrational movement.