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US 6,641,178 B2Granted
Jointing system for pipes
AssigneeCoda Limited
InventorDenis Brendan Gowing
Life of this patent
Estimating the term…
Abstract
A copper pipe has a circumferential groove formed in an outer wall to receiver an O-ring seal. The groove is formed a pre-set distance from a free end of the pipe. Two pipe lengths are jointed together by a coupling having a housing with pipe seal-receiving seats at each end for receiving the O-ring seal fitted to the pipe. Caps screw threadingly engage the housing to clamp the pipe lengths in the housing. The fitting can be pre-assembled and used as a push-in fitting with a subsequent tightening by hand.
Claims16
A pipe fitting comprising:
- a pipe having a circumferential groove formed therein, the groove being axially spaced-apart a set distance from a free end of the pipe;
- a housing having an opening for receiving the pipe;
- a cap engageable with the housing;
- the housing having a seal receiver;
- and
- a seal locatable in the seal receiver of the housing;
- the housing having a stop against which the free end of the pipe is engageable, the stop being located a distance axially inwardly of the seal receiver substantially corresponding to the pipe set distance;
- the pipe being a push fit in the housing such that the free end of the pipe is engageable against the stop and the seal is thereby engageable in the groove of the pipe, the cap being axially movable relative to the housing to clamp the seal located in the pipe groove to seal the pipe in the housing and prevent pull out of the pipe from the housing.
5 more elements
A method for assembling a pipe fitting comprising the steps of:
- forming a seal-receiving groove in a pipe a set distance from a free end of the pipe;
- providing a housing having an opening for receiving a pipe, a pipe seal receiver and a pipe engagement stop axially spaced apart from the seal receiver;
- providing a cap for the housing;
- inserting a seal into the seal receiver of the housing;
- attaching the cap to the housing;
- inserting the pipe into the housing until the free end of the pipe is engaged against the stop, and the seal is engaged in the pipe groove;
- and
- tightening the cap to seal the pipe in the housing and to prevent pipe pull-out.
5 more elements
Dependencies are inferred from the claim text.