Pipe joint glands
AssigneeColumbus Foundries, Inc.
InventorBen A. Dugger
Life of this patent
Estimating the term…
Abstract
A ductile iron molded pipe joint gland used to create an effective and lasting seal between interfitting pipe sections allows considerable deflection of the joint in any direction from the axis of the pipeline without loss of seal integrity. The interfitting pipe sections are mechanically joined securely by the gland and compressible seal in a follower gland embodiment and also by angled set screws in a retainer gland embodiment. The pipe joint gland utilizes a minimum of material for reduced weight and savings of energy in its manufacture and transportation without sacrifice of strength. The construction and shallow angle of the sealing gasket engaging face of the gland prevents gasket creep under high pressure.
Claims17
A pipe joint gland for forming an effective fluid seal between interfitting bell and spigot pipe sections, comprising:
- (a) a web of substantially constant thickness adapted to surround a spigot pipe section in a plane normal to the spigot pipe section axis;
- (b) a generally axial wall connected to the interior margin of the web, adapted to surround the spigot pipe section and extending from one side of the web;
- (c) an elastic seal annular contact face formed on the end of the wall away from the web, wherein the face;
- (i) tapers, from its outer periphery, at a shallow angle to a plane normal to the axis of the spigot pipe section, toward the web;
- (ii) is radially wider than the wall;
- and
- (iii) projects inwardly from the interior surface of the wall;
- (d) a plurality of bosses formed circumferentially and spaced equidistantly from each other on the side of the web away from the wall, radially outward of the wall;
- and
- (e) a plurality of bolt holes penetrating the bosses and the web, wherein each corresponds to a boss and:
- (i) is circular in shape on the end of the boss away from the wall;
- (ii) is oval in shape on the side of the web toward the wall;
- and
- (iii) tapers uniformly from circular to oval shape.
A pipe joint gland for forming an effective fluid seal between interfitting bell and spigot pipe sections, comprising:
- (a) a web adapted to surround a spigot pipe section in a plane normal to the spigot pipe section axis;
- (b) a generally axial wall connected to the interior margin of the web, adapted to surround the spigot pipe section and extending from one side of the web;
- (c) an elastic seal annular contact face formed on the end of the wall away from the web, wherein the face:
- (i) tapers, from its outer periphery, at a shallow angle to a plane normal to the axis of the spigot pipe section, toward the web;
- (ii) is radially wider than the wall;
- and
- (iii) projects inwardly from the interior surface of the web;
- (d) a plurality of bosses formed circumferentially and spaced equidistantly from each other on the side of the web away from the wall, radially outward of the wall;
- (e) a plurality of bolt holes, each penetrating a boss and the web;
- (f) a plurality of radial ribs located only on the side of the web away from the wall, each connecting a boss to the wall;
- and
- (g) a plurality of outer scalloped arcuate ribs located only on the periphery of the web, each connecting two adjacent bosses.
Dependencies are inferred from the claim text.