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:
Jan. 20, 1981
Filed:
Jul. 16, 1979
James C Hsiao, Morton Grove, IL (US);
Yoichiro Ishikawa, Villa Park, IL (US);
Union Special Corporation, Chicago, IL (US);
Abstract
This disclosure relates to a sewing machine lubrication system including positive displacement mechanisms adapted to transmit lubricant under pressure to the operating mechanisms of the machines and for transferring lubricant collected in non-drainable areas of the machine to the lubricant reservoir. Arranged in combination with the displacement mechanisms is a filtering/distribution assembly which serves to individually and selectively supply a relatively small, but sufficient quantity of lubricant to the operating mechanisms according to the requirements thereof. The present invention further provides a pressure relief valve assembly for selectively regulating the pressure in the lubrication system.