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:
Sep. 11, 2007
Filed:
Jun. 20, 2005
Ernest R. Siler, Springboro, OH (US);
Ronald G. Smith, New Carlisle, OH (US);
Kathleen Murphy, Wilmington, OH (US);
David B. Drennen, Bellbrook, OH (US);
Patrick A. Mescher, Bellbrook, OH (US);
Thomas J. Bucholz, Sanford, MI (US);
Ernest R. Siler, Springboro, OH (US);
Ronald G. Smith, New Carlisle, OH (US);
Kathleen Murphy, Wilmington, OH (US);
David B. Drennen, Bellbrook, OH (US);
Patrick A. Mescher, Bellbrook, OH (US);
Thomas J. Bucholz, Sanford, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A method for making a ball-nut includes cutting a 360-degree closed-loop surface groove in the inner-circumferential wall portion of a ball-nut body using a whirling-type internal-diameter cutting machine. The closed-loop surface groove surrounds the longitudinal axis of the wall portion, is adapted for receiving a plurality of ball bearings, includes a helical-grooved portion substantially coaxially aligned with the longitudinal axis, and includes a crossover-grooved portion. A method for making a ball-screw includes cutting at least one 360-degree closed-loop surface groove in the outer-circumferential wall portion of a ball-screw body using a whirling-type external-diameter cutting machine. The closed-loop surface groove surrounds the longitudinal axis of the wall portion, is adapted for receiving a plurality of ball bearings, includes a helical-grooved portion substantially coaxially aligned with the longitudinal axis, and includes a cross-under-grooved portion.