Tubular one-way closure for injecting a material into a hole
AssigneeBergwerksverband GmbH
InventorsWalter Benedum, Otto-Ernst Glaesmann, Walter Marsch
Life of this patent
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Abstract
A tubular one-way closure for injecting a material, particularly synthetic plastic foam material, into a hole has a throttle channel through which the material is to be injected, and a central tube rotatable about its axis and movable in its axial direction. The closure also comprises an expandable anchoring member actuated by said central tube so as to anchor said closure in said hole while being expanded, and an elastic sealing member also actuated by said central tube so as to seal said hole after anchoring of the same.
Claims14
A tubular one-way closure for injecting a material, particularly synthetic plastic foam material, into a hole, comprising a central tube having a front section and a rear section and a passage through which material is to be injected;
- means for drawing said tube axially into the hole in response to rotation of said tube about its longitudinal axis, including an expandable annular anchoring member surrounding a portion of said tube;
- a shoulder on said rear section of said tube;
- and an elastic annular sealing member surrounding said tube intermediate said anchoring member and said shoulder so as to be axially compressed in response to axial advancement of the tube into said hole.
Dependencies are inferred from the claim text.