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:
Nov. 25, 2003
Filed:
Oct. 31, 2001
Shinyo Kimoto, Kanagawa, JP;
Kenji Tokunaga, Kanagawa, JP;
Katsunori Sakata, Fukayasu-Gun, JP;
Norio Kajita, Aichi-Ken, JP;
Other;
Abstract
A cylinder of the invention can precisely send out a piston rod into four different positions and comprises: a spring receiving member placed coaxially with piston rod in a piston room (I-II) of a cylinder tube so that the movement of spring receiving member is limited by one end of the piston room; a first spring member to separate the spring receiving member from the piston; a stopper formed on piston rod to limit spring receiving member from moving in the opposite direction to piston , a hollow formed on the periphery of piston rod at farther position from piston than stopper ; and a stop pin installed in the cylinder tube to be pressed in the direction of hollow by a second spring member to engage with hollow , wherein the movable length of piston rod while stop pin is engaged with hollow is larger than movable distance of spring receiving member from the piston. A load port and a production system of this invention are constructed using the cylinder.