Conduit connector
First Claim
1. A connection device for securing an exteriorly corrugated pipe end within a fitting having an internal shoulder portion comprising, an array of spaced finger portions arranged arcuately about a central polar axis for insertion axially within the fitting, each finger portion having an enlarged head portion thereon including a radially inwardly extending transverse buttress in use to engage an exterior corrugation of the pipe;
- a first radially outwardly inclined transverse cam portion, forming a first angle with the axis, for a first engagement axially against an internal shoulder portion of the fitting, in use to force the buttress radially inwardly to engage the corrugation while the cam portion engages the fitting internal shoulder portion; and
a second outwardly inclined transverse cam portion extending radially outwardly from the first cam portion and forming a second angle with the axis, the second angle being greater than the first angle, for second engagement axially against the internal shoulder portion of the fitting;
in use to force the buttress radially inwardly to engage the pipe corrugation while the second cam portion engages said fitting internal shoulder portion, to preclude withdrawal of the device from the fitting.
4 Assignments
0 Petitions
Accused Products
Abstract
A connection device for use in securing an end of a corrugated pipe to a fitting such as a terminal box connector or a pipe-to-pipe coupling has an array of fingers extending axially from an annular ring, for insertion into the fitting. Enlarged head portions at the inner ends of the fingers serve to engage the ribs or corrugations on the pipe outer surface, when a pipe is inserted therepast, and also provide a differentiated camming action to secure engagement of the head portions with a corrugation of the pipe and to prevent withdrawal of the pipe from the fitting. The fitting with which the device is combined also has an axially extended inner peripheral seat against which the pipe corrugations seat, to preclude passage of concrete betwen the pipe and the fitting.
137 Citations
22 Claims
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1. A connection device for securing an exteriorly corrugated pipe end within a fitting having an internal shoulder portion comprising, an array of spaced finger portions arranged arcuately about a central polar axis for insertion axially within the fitting, each finger portion having an enlarged head portion thereon including a radially inwardly extending transverse buttress in use to engage an exterior corrugation of the pipe;
- a first radially outwardly inclined transverse cam portion, forming a first angle with the axis, for a first engagement axially against an internal shoulder portion of the fitting, in use to force the buttress radially inwardly to engage the corrugation while the cam portion engages the fitting internal shoulder portion; and
a second outwardly inclined transverse cam portion extending radially outwardly from the first cam portion and forming a second angle with the axis, the second angle being greater than the first angle, for second engagement axially against the internal shoulder portion of the fitting;
in use to force the buttress radially inwardly to engage the pipe corrugation while the second cam portion engages said fitting internal shoulder portion, to preclude withdrawal of the device from the fitting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- a first radially outwardly inclined transverse cam portion, forming a first angle with the axis, for a first engagement axially against an internal shoulder portion of the fitting, in use to force the buttress radially inwardly to engage the corrugation while the cam portion engages the fitting internal shoulder portion; and
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20. A connection device for securing an exteriorly corrugated pipe end having a major axis within a fitting having an internal shoulder, the device comprising an array of arcuately spaced finger portions for insertion within the fitting, each finger portion having an enlarged head portion thereon including a radially inwardly extending transverse buttress in use to engage an external corrugation on said pipe, and a first radially outwardly directed cam portion in use to axially engage an internal shoulder portion of said fitting and forming a first angle with the axis so that in use as the pipe end is withdrawn from the fitting a major component of axial withdrawal forces are directed through the head in a radial direction;
- and a second cam portion extending radially outwardly of the first cam portion in use to axially engage the internal shoulder portion and forming an angle with the axis greater than the first angle such that a major component of axial withdrawal forces are directed through the head in an axial direction, to preclude withdrawal of the device from the fitting.
- View Dependent Claims (21, 22)
Specification