Non-sliding gate valve for high vacuum use

• US 5,002,255 A
• Filed: 02/27/1990
• Issued: 03/26/1991
• Est. Priority Date: 03/03/1989
• Status: Expired due to Fees

• Current Assignee: IRIE Koken Kabushiki Kaisha
• Original Assignee: IRIE Koken Kabushiki Kaisha
• Inventors: Katagiri, Toshiro, Hayashi, Yuzo, Sawa, Toshio, Irie, Norikimi
• Primary Examiner(s): Fox, John C.
• Application Number:
  US07/485,985
• Time in Patent Office: 392 Days
• Field of Search: 251/158, 251/187, 251/193
• US Class Current: 251/193
• CPC Class Codes: F16K 3/18 by movement of the closure members

Abstract

A non-sliding vacuum gate valve comprising a valve housing hermetically sealed to the outside, an opening formed in one of its side walls, and a valve body disposed within the valve housing and adapted to sealingly open or close the valve seat formed around the opening in which the mechanism for opening and closing the valve body sealingly open or close the valve seat is provided outside the valve housing, the mechanism being made to be able to carry out two subsequent movements, one to move the valve body in a direction substantially perpendicular to the valve seat, the other to move the valve body substantially orthogonal to a direction substantially perpendicular to the valve seat with the valve body being spaced apart from the valve.

Claims

1. In a non-sliding vacuum gate valve including a valve housing, the inside of which can be held hermetically sealed from the outside, having an opening formed in one of its side walls, and a valve body disposed within said valve housing and adapted to sealingly open or close a valve seat formed around said opening, the improvement wherein a mechanism for moving said valve body to sealingly open or close said opening formed in said valve body is provided outside said valve housing, said mechanism being capable of carrying out two sequential movements, one to move said valve body in a direction substantially perpendicular to said valve seat, and the other to move said valve body substantially orthogonal to said substantially perpendicular direction with said valve body being spaced apart from said valve seat during said orthogonal movement;

said mechanism comprising a valve body actuating rod means connected to said valve body within said valve housing and loosely passing therethrough so as to elongate in a direction substantially orthogonal to said movement of said valve body substantially perpendicular to said valve seat, a swing frame means disposed outside said valve housing and comprising a horizontal arm member centrally connecting said valve body actuating rod means and a pair of leg members each vertically suspended from each end of said arm member, a fluid cylinder means secured to said arm member of said swing frame means so as to have a central axis coinciding with the center line of said valve body actuating rod means with its piston rod being connected thereto, a pair of support column means secured to said valve housing and elongating is parallel with said elongating direction of said valve body actuating rod means, a pair of fluid cylinders each secured to said support column means, respectively, and each arranged so as to push the respective ends of said horizontal arm member of said swing frame means, and pin means each swingably connecting the respective lower portions of said leg members of said swing frame means to said support column means.

2. A non-sliding vacuum gate valve as claimed in claim 1, wherein said valve body is resiliently connected to a valve body pressing member secured centrally to the lower end of said valve body actuating rod means, and said valve body pressing member is adapted to press said valve body at substantially its center portion.

3. A non-sliding vacuum gate valve as claimed in claim 2, wherein said valve body is resiliently connected to said valve body pressing member by means of a set of coil springs disposed between said valve body and said valve body pressing member.