Seal assembly for pressure or vacuum chambers
AssigneeDiamond International Corporation
InventorGlenn V. Williams, Jr.
Life of this patent
Estimating the term…
Abstract
Improvements in seal assembly for use in pressure or vacuum chambers or the like comprising a sealing element which may be selectively placed in sealing condition or retracted to a non-sealing condition, the sealing element having a sealing surface adapted to be urged into contact with a wall member and also a surface including portions against load members which may be loaded to urge the sealing surface into sealing condition or relaxed, and spring unit for continuously urging the sealing element away from sealing condition whereby the sealing element is in fact urged out of sealing condition when the load members are relaxed.
Claims12
Seal assembly for use in forming a zone or chamber in which pressure or vacuum may be applied in the interior of a vacuum roll such as is used in the manufacture of paper comprising:
- a. a generally elongate sealing element having an arcuate sealing surface conforming generally in curvature to that of the interior of the roll in which it is to be incorporated;
- b. a generally flat spring unit disposed radially inwardly of said sealing element and being substantially equal to said sealing element in axial length and in circumferential width;
- c. loading means disposed between said sealing element and said spring unit to selectively apply a load for urging said sealing element away from said spring unit to a sealing condition;
- and
- d. means securing said sealing element and said spring unit together with said loading means therebetween and said spring unit urging said sealing element toward a non-sealing position.
Dependencies are inferred from the claim text.