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. 13, 1998
Filed:
Jan. 25, 1996
Shinji Koyano, Narashino, JP;
Ryuichi Matsuzaki, Narashino, JP;
Seiko Seiki Kabushiki Kaisha, , JP;
Abstract
A vacuum-oriented vertical transfer system which provides super vacuum/super clean environments, and a gate valve assembly which reduces the size of electromagnet sections. The vacuum-oriented vertical transfer system includes a cylindrical partition wall, and a rod vertically moved through an open bottom of a vacuum container. The rod is floatingly supported in radial and axial directions thereof by a radial magnetic support device and an axial magnetic support device, respectively. The gate valve assembly comprises a closure member mounted for positioning adjacent to and away from a port of a container to close and open the port, respectively. A neck member is integrally connected to the closure member and is mounted for movement to position the closure member to open and close the port of the container. A radial magnet device levitates the neck member by magnetic forces in a radial direction thereof. An axial magnetic device levitates the neck member by magnetic forces in an axial direction thereof. A moving mechanism moves the neck member to position the closure member to open and close the port of the container.