Device for sealing the end of sheath pipe
First Claim
1. Sealing means whereby a main pipe can be concentrically supported inside a sheath pipe that has an inside diameter substantially larger than the outside diameter of the main pipe, and whereby the main pipe is protected against vibration and the like imparted to the sheath pipe and entry of foreign matter into the space between the pipes is prevented, said sealing means comprising:
- A. a pair of annular sealing elements of resiliently yieldable material, each of said sealing elements1. being substantially cup-shaped in cross section to havea. a concave surface that faces in one axial direction and terminates at substantially coplanar inner and outer edges of the sealing element andb. a convex surface that faces in the opposite direction,2.
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Accused Products
Abstract
Device for sealing the end of a sheath pipe that protects a main pipe therein, comprising a pair of sealing rings arranged in face-to-face relation, a pair of flanges oppositely placed at the outside of said sealing rings, all these sealing rings and flanges being tightened with bolts into a unit, each sealing ring being made of flexibly elastic material having a cup shape cross section.
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Citations
4 Claims
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1. Sealing means whereby a main pipe can be concentrically supported inside a sheath pipe that has an inside diameter substantially larger than the outside diameter of the main pipe, and whereby the main pipe is protected against vibration and the like imparted to the sheath pipe and entry of foreign matter into the space between the pipes is prevented, said sealing means comprising:
A. a pair of annular sealing elements of resiliently yieldable material, each of said sealing elements 1. being substantially cup-shaped in cross section to have a. a concave surface that faces in one axial direction and terminates at substantially coplanar inner and outer edges of the sealing element and b. a convex surface that faces in the opposite direction, 2. - View Dependent Claims (4)
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2. each sealing element when in relaxed condition having
a. an inside diameter to loosely fit around a main pipe and b. an outside diameter to loosely fit inside a sheath pipe, and each sealing element having a plurality of circumferentially spaced bolt holes therethrough, the bolt holes in the two sealing elements being located to align with one another when said sealing elements are concentrically disposed with their concave surfaces facing one another;-
B. a pair of annular flange members of substantially rigid material, each of said flange members having 1. an inside diameter at least as large as the inside diameter of the sealing elements, 2. an outside diameter no larger than the outside diameter of the sealing elements, and 3. bolt holes therethrough arranged to align with the bolt holes in the sealing elements when the flange member is disposed in concentric relation to the sealing elements; C. threaded means on one of said flange members cooperable with bolts received in its bolt holes; and D. a plurality of bolts, each extending through aligned bolt holes in both flange members and both sealing elements and holding them in concentric relation with said inner and outer edges on the two sealing elements respectively engaging one another and with the flange members overlying the opposite convex surfaces of the sealing elements, said bolts
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3. having threaded shanks engaged with said thread means on said one flange member andhaving heads overlying the other flange member
so that tightening of said bolts resiliently deforms the sealing elements in axial compression and thus expands them radially inwardly and
Specification