Patent ID: 8628122
Filing Date: 2014-01-14
Classification: F01N,F16L

Abstract:
1. An assembly for forming a pipe compression joint comprising: a male pipe end having a male pipe wall that defines a male channelway with an upstream diameter, wherein the male pipe wall includes an outwardly-extending annular rib with an outward transition portion having a constant radius of curvature from the upstream diameter to a chine portion, and an inward transition portion having a non-constant radius of curvature that decreases from the chine portion to a straight portion with a downstream diameter less than the upstream diameter, and wherein the inward transition portion has an outside surface capable of deformation; a female pipe end having a female pipe wall that defines a female channelway with a constant diameter greater than the downstream diameter of the straight portion of the male pipe end and that terminates at a flared portion capable of deformation and having an inside surface that defines an opening adapted for slidably receiving the straight portion; a first clamp ring having an opening for slidable receipt of the male pipe wall and having a radially-curved shoulder with a constant radius of curvature that is complementary to the constant radius of curvature of the outward transition portion to enable a longitudinal force applied to the first clamp ring to be transferred to the outwardly-extending annular rib of the male pipe end when the first clamp ring slidably engages the outward transition portion while enabling the first clamp ring to be rotated relative to the male pipe end; and a second clamp ring fixedly attached to the female pipe wall at the constant diameter portion a distance from the flared portion such that the second clamp ring is spaced from the flared portion by at least part of the constant diameter portion and does not move relative to the female pipe end so that a longitudinal force applied to the second clamp ring will be transferred to the female pipe end; wherein when the male pipe wall straight portion is received in the female pipe wall opening and the first clamp ring is controllably urged toward the second clamp ring, the inside surface of the flared portion of the female pipe end will engage the outside surface of the inward transition portion in surface-to-surface contact, which will increase as at least one of the inward transition portion and the flared portion is deformed to facilitate continuity of the surface-to-surface contact and effecting a gasketless sealed joint.