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Sliding device for the gas-tight and air-tight closure of a container opening or of a conduit

  • US 4,052,036 A
  • Filed: 07/15/1975
  • Issued: 10/04/1977
  • Est. Priority Date: 07/15/1974
  • Status: Expired due to Term
First Claim
Patent Images

1. A sliding device for the gas-tight and air-tight closure of an opening of given size in a body, said sliding device comprising a thick locking member (7;

  • 7'"'"';

    7") which is displaceable by means of a push rod (8) and which comprises a deflectable sealing plate (10;

    10'"'"';

    10") having a counter element (12;

    12'"'"';

    12") connected therewith by means of a spring member (13,14,35) wherein the locking member (7;

    7'"'"';

    7") contains ball spreading elements (20) which rest against the sealing plate (10;

    10'"'"';

    10") and the counter element (12;

    12'"'"';

    12") to spread apart the sealing plate (10;

    10'"'"';

    10") and the counter element (12;

    12'"'"';

    12") when the locking member (7;

    7'"'"';

    7") has been moved into the closing position and to press the sealing plate (10;

    10'"'"';

    10") onto a seat of the body in a seal-tight manner through the intermediary of a narrow annular seat packing (11;

    11'"'"';

    11;

    ), characterized in that a plurality of the spreading elements (20) are disposed in the locking member (7;

    7'"'"';

    7") along a single closed line which, in the closing position of the locking member (7;

    7'"'"';

    7"), is located between the inner boundary line of the seat packing (11;

    11'"'"';

    11") and the boundary line of the opening (2,4) such that fluid pressure which acts on the sealing plate (10;

    10'"'"';

    10") within the enclosed area of the spreading elements and which is directed in the opposite direction to the sealing pressure at the seat to effect deflection of the sealing plate in the manner of a lever arm to produce an increased sealing pressure upon the seat packing.

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