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. 01, 1993
Filed:
May. 27, 1992
Wolf-Dieter Fuhrmann, Aachen, DE;
Singer Spezialnadelfabrik GmbH, Wurselen, DE;
Abstract
A sewing machine needle has a piston for clamping the needle into a sewing machine, a needle shaft comprised of a shaft portion and an end piece with a tip, whereby the needle shaft has a needle eye between the shaft portion and the end piece for receiving a sewing thread. A conical portion connected to the piston forms a transition into the needle shaft. The end piece, between the tip and the needle eye, has a triangular radial cross-section with rounded corners, whereby the size of the triangular cross-section increases from the tip toward the needle eye, and whereby the triangular cross-section has its greatest size in the vicinity of the needle eye. The needle shaft, in the area of the needle eye, has an essentially circular cross-section, and this circular cross-section has a size that is smaller than the greatest size of the triangular cross-section.