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. 15, 2009
Filed:
May. 24, 2004
Jurgen Osterlanger, Emskirchen, DE;
Dieter Adler, Herzogenaurach, DE;
Manfred Kraus, Herzogenaurach, DE;
Jurgen Osterlanger, Emskirchen, DE;
Dieter Adler, Herzogenaurach, DE;
Manfred Kraus, Herzogenaurach, DE;
Ina-Schaeffler KG, Herzogenaurach, DE;
Abstract
Ball screw having a spindle nut () arranged on a spindle (), together with balls () which are arranged in a series and are capable of rolling in a helical ball track (), the helical ball track () being defined by a thread groove () formed on the spindle () and by a thread groove () formed on the spindle nut (), the balls () arranged in a series being returned in a return duct () from an outlet end to an inlet end of the helical ball track (), the divided circle end play of the series of balls being less than or equal to 0.3 millimeters or the ratio between the pitch of the helical ball track () and the diameter of the balls () ranging from 1.02 to 1.2 or the thread grooves () of the spindle nut () and of the spindle () in each case having a gothic profile (), a pressure angle formed by the balls () in contact with the gothic profile () ranging from 15 to 35 degrees.