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:
Nov. 30, 1993
Filed:
Jun. 13, 1991
Applicant:
Inventor:
Norman L Scott, Port Lambton, Ontario, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01C / ; E01C / ; E21B / ; E21C / ;
U.S. Cl.
CPC ...
404 94 ; 404 76 ; 299 38 ; 172197 ;
Abstract
A scarifier comprises a plurality of supported, downwardly depending, axially secured scarifying teeth supported on a scarifying-tooth supporting frame connected in loose fitting relation to a tractor to thereby operatively impart a first component of lateral play at respective scarifying tip ends. The frame also includes a bracket engaging respective shank portions of the scarifying teeth en axially secured relation with sufficient degrees of lateral freedom to provide a second component of lateral play to spaced apart scarifying points of respective ones of those teeth.