Tube couplings
First Claim
1. A tube coupling comprising a coupling body having a throughway open at opposite ends thereof to receive tubes to be coupled to the body and to enable a tube to pass through the body, two collets disposed in the respective ends of the coupling body through which tubes to be inserted in the body pass, the collets having resilient arms extending axially into the throughway to grip the respective tubes and the coupling body having internal frusto-conical cam surfaces adjacent said open ends and tapering towards the respective ends of the body to be engaged by the resilient arms of the collet with movement of the respective tubes outwardly of the coupling body to press the arms inwardly against the outer surfaces of tubes, and means in the throughway between said frusto-conical cam surfaces to limit the entry of a tube into the coupling body when inserted from one end thereof while permitting the tube to pass through the body when inserted from the other end.
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Accused Products
Abstract
The disclosure relates to double ended tube coupling (10) having a coupling body (11) with the throughway (12) through which a tube can pass. Collets (16) are located in the open ends of the throughway having resilient arms to engage the tube and tapered internal cam surface (15) are formed adjacent the open ends of the throughway to engage the arms of the collets to cause the collet to lock tubes extending into the ends of the coupling body in the body. Midway along the throughway in the coupling body there are four resilient arms (25) moulded integrally with the wall of the coupling body and inclined towards one end of the coupling body to provide end stops (26) to limit the insertion of a tube into the coupling body from that one end but to permit a tube to pass through the coupling body when inserted from the other. Thus the coupling body can be slid over an end part of one tube, a second tube moved into alignment with the first tube and the coupling body then return to bridge the tubes with the end stops of the resilient arms locating the coupling body between the two tubes.
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Citations
8 Claims
- 1. A tube coupling comprising a coupling body having a throughway open at opposite ends thereof to receive tubes to be coupled to the body and to enable a tube to pass through the body, two collets disposed in the respective ends of the coupling body through which tubes to be inserted in the body pass, the collets having resilient arms extending axially into the throughway to grip the respective tubes and the coupling body having internal frusto-conical cam surfaces adjacent said open ends and tapering towards the respective ends of the body to be engaged by the resilient arms of the collet with movement of the respective tubes outwardly of the coupling body to press the arms inwardly against the outer surfaces of tubes, and means in the throughway between said frusto-conical cam surfaces to limit the entry of a tube into the coupling body when inserted from one end thereof while permitting the tube to pass through the body when inserted from the other end.
Specification