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. 08, 1991
Filed:
Oct. 18, 1990
Richard E Eckman, Houston, TX (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
An improved automatic feed drill including a housing, a rotatable tool spindle located for reciprocating movement in the housing, driving means located in the housing operably connected with the spindle for rotating and reciprocating the spindle in feed and retraction movements, and structure for supporting the spindle including a nose assembly secured with the housing around the drilling end of the spindle having a telescoping section with a bore concentric with the spindle, and a bearing on the spindle drilling end fitted in sliding relation in the nose bore for piloting the spindle and a drill connected thereto during reciprocating movement of the spindle. A right angle form of the feed drill further include drive threads on the spindle having a flat crest, and a closely fitting bushing in the head of the drill around the upper end of the spindle, the bushing having a concentric bore fitting in close piloting relation with the drive thread crest for holding the upper end portion of the spindle against lateral movement as the spindle reciprocates.