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:
Jun. 11, 2002
Filed:
Oct. 06, 2000
Amir Ziv-Av, Kiryat Ono, IL;
Other;
Abstract
An apparatus for providing a variable pitch thread includes a hollow cylindrical element configured to provide a plurality of parallel, radially projecting ridges extending circumferentially around the cylindrical element and spaced apart with a given step as measured parallel to a central axis of the cylindrical element. The cylindrical element also featuring a slit extending substantially parallel to the central axis along the length of the cylinder. An actuation mechanism is configured to selectively generate controlled relative displacement between the opposing edges on opposing sides of the slit so as to vary a helical angle of the projecting ridges relative to the central axis. The actuation mechanism is preferably configured to relatively displace the opposing edges such that the plurality of projecting ridges together form alternatively a helical pattern and a pattern of substantially closed rings.