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. 01, 2008
Filed:
Dec. 10, 2003
Hideaki Koda, Nagano, JP;
Sentaro Kobayashi, Nagano, JP;
Osamu Sakai, Nagano, JP;
Motohiro Matsuzawa, Nagano, JP;
Hideaki Koda, Nagano, JP;
Sentaro Kobayashi, Nagano, JP;
Osamu Sakai, Nagano, JP;
Motohiro Matsuzawa, Nagano, JP;
A.K. Technical Laboratory, Inc., Nagano, JP;
Abstract
Improvement of simplicity and durability of a stretch rod extending device and a bottom mold lifting device, equipped on a stretch blow molding machine, is achieved by applying a combination of a magnetic screw shaft and a magnetic nut member, which is able to convert rotary-linear movement smoothly without contact. The nut member and the screw shaft of the extending deviceand lifting devicecomprise a magnetic nut memberand a magnetic screw shaft, having spiral N magnetic pole and S magnetic pole alternately provided on inner peripheral surface of a cylindrical member and outer peripheral surface of a shaft at a same regular pitch. The magnetic screw shaft is inserted into the plunger, having the magnetic nut member equipped inside with keeping required clearance so as to match the magnetic pole to oppose the magnetic nut member at the same poles each other.