Pipe joints or couplings – Elbow
Patent
1977-05-26
1979-08-28
Stein, Mervin
Pipe joints or couplings
Elbow
285 39, 285 89, 285158, 285161, 285328, 285336, 285339, 285346, 285348, 285352, 285423, 403 19, F16L 1300, F16L 1902, F16L 4108, F16L 4700
Patent
active
041658930
ABSTRACT:
A connector is described for joining tubes together, particularly plastics tubing as used in laboratories and the like.
The connector comprises a first member having a barb-like projection through which the tube can be pushed but cannot be pulled in the reverse direction due to the interaction between the barb-like projection and the surface of the tube. The protruding captive end of the tube passes through a resiliently deformable disc of plastics material preferably Polytetrafluroethylene and in a preferred embodiment the disc is partly housed in a cup-shaped extension from the first member.
The assembly of first member and disc is secured within a sleeve by means of a screw-thread engagement between the said sleeve and a further member which acts on the rear of the said first member. The said further member is screw-threadedly advanced into or onto the sleeve.
A screwdriver slot is formed at the end of the said further member and a transverse slot intersects the screwdriver slot to allow the tube extending therethrough to be pushed to one side or the other to facilitate the insertion of a screwdriver blade or the like tool.
In one embodiment the end face of the plastics disc is plain for seating against a corresponding plain end face of a similar plastics disc or seating within the sleeve. In another embodiment the sleeve is formed with two conical seatings at opposite ends joined by a through-bore and the discs are formed with complementary conical mating surfaces.
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patent: 2787480 (1957-04-01), Staller
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patent: 3884509 (1975-05-01), Marsh, Jr.
Collard Allison C.
Galgano Thomas M.
Pietruszka Carl F.
Stein Mervin
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