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. 23, 1993
Filed:
Oct. 04, 1991
Applicant:
Inventor:
Roger D Smith, Cedar Hill, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
82127 ; 414 17 ;
Abstract
A bar feed apparatus for supplying elongated bar stock to the headstock of an automatic lathe. An elongated guide tube receives the stock and includes a hydraulic piston that controllably advances the stock toward the lathe. For cushioning the rotating bar stock against vibration within the tube, controlled quantities of hydraulic fluid is forced longitudinally into an annular clearance about the piston to and about the bar stock. A flexible seal secured downstream of the piston effects collapse during the forward stoke of the piston and effects a vacuum seal during a vacuum induced return stoke of the piston.