Interface seal

Abstract

A seal member has a configuration including a ring-shaped main body portion, an inner peripheral lip portion protruding from a ring inner peripheral portion of the main body portion and an outer peripheral lip portion protruding from a ring outer peripheral portion of the main body portion. The inner peripheral lip portion takes an O-ring shape deformable in a protruding direction. The outer peripheral lip portion takes a structure deformable in a direction different from an extending direction, corresponding to a pressure in a sealed area. The member preferably sealing, when communicating a plurality of spaces separated from an external space, these spaces from an external environment, is thereby provided.

1 . A seal member disposed between an opening portion forming surface of a first space and an opening portion forming surface of a second space to separate said first and second spaces from the ambiance when connecting together said first space and said second space each having an opening portion that are capable of keeping an internal pressure at a pressure different from an ambient pressure while being each separated from the ambiance, said seal member comprising: 
 a main body portion taking a ring-shape and fixed along an outer periphery of said opening portion in any one of the opening portion forming surface of said first space and the opening portion forming surface of said second space;    an inner peripheral lip portion extending from an inner peripheral portion of a ring-shaped upper surface of said main body portion substantially in a direction of another opening portion forming surface different from the opening portion forming surface on the side where said main body portion is fixed; and    an outer peripheral lip portion extending from an outer peripheral portion of the ring-shaped upper surface of said main body portion substantially in the direction of another opening portion forming surface different from the opening portion forming surface on the side where said main body portion is fixed,    wherein said inner peripheral lip portion takes an O-ring shape connected to the inner peripheral portion in said main body portion and can deform in a direction vertical to the ring-shaped upper surface of said main body portion, and    said outer peripheral lip portion can deform in a direction substantially parallel with the ring-shaped upper surface of said main body portion.    
   
   
       2 . A seal member according to  claim 1 , wherein said main body portion has a hole penetrating from the ring-shaped upper surface down to a ring-shaped undersurface formed with neither said inner peripheral lip portion nor said outer peripheral lip portion between said inner peripheral lip portion and said outer peripheral lip portion.  
   
   
       3 . A seal member according to  claim 2 , wherein said outer peripheral lip portion takes substantially a funnel-like shape of which an inside diameter gets larger as it gets farther away from said main body portion.