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:
Oct. 05, 1999
Filed:
Jun. 30, 1998
Arthur Picker, Steinhagen, DE;
Durkopp Adler, , DE;
Abstract
An actuating device (54) for lifting the presser foot (53) of a sewing machine. A piston (14) having a piston rod (15) is supported on the bearing (13) which guides the presser foot support rod (18). The presser foot support rod (18) is biased against the sewing material by a spring (40). The piston (14) is surrounded by a cylinder (26). The piston (14) with the piston rod (15) and the cylinder (26) form a piston-cylinder drive for actuation by compressed air, to urge the piston rod (15) against the force of the spring (40) and thereby lift the presser foot (53) off of the sewing material. The actuating device (54) has two set screws (42, 45) which respectively control the spring force acting on the presser foot and the distance the presser foot is raised by the actuating device. Two embodiments are described.