Spigot-and-socket joint secured against sliding

Details Spigot-and-socket joint secured against sliding Spigot-and-socket joint secured against sliding

1992-10-15

1994-03-29

Arola, Dave W.

Pipe joints or couplings

Movable jaw

285374, F16L 2106

Patent

active

052978249

ABSTRACT:
The spigot-and-socket joint which is secured against sliding is designated for moulded parts and for socket pipes (1) produced by the centrifugal casting technique, with the spigot end (3) of the one pipe adapted to be slid, with radial play, into the socket end (2) of the other pipe. In the socket end there are arranged a sealing ring (8) and a separate clamping ring (14) comprising a plurality of circumferentially extending, spaced clamping segments (15) having a spherically convex outer surface (17) and, on their inner surface (18), a tooth system (19) which, in the presence of axial forces, presses radially onto the spigot end (3) as the spherically convex surface (17) cooperates with a pipe socket's inner surface (18) which tapers conically towards the end. An elastomer support member (20), which can be fixed in its position at the socket face end and supports the same, is provided on the clamping ring (14). A form, which ensures proper retention also in the case of increased rated widths, is obtained when the support member's annular disk-shaped portion (23), which bears on the socket front face (22), comprises a reinforced transition region (26) of increased flexural strength in the region of the inner edge of the socket front face, with the portion (24) connecting to the clamping ring (14) issuing therefrom, and when the socket front face (22) has at its inner edge a recess matching the cross section of the reinforced transition region (26). There a steel ring (28), which increases the flexural strength and can be optionally inserted via an axial insertion slit (29), is cooperating with the reinforced transition region (26) of the support member.

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patent: 4293149 (1981-10-01), Bond
patent: 4623170 (1986-11-01), Cornwall
patent: 4641858 (1987-02-01), Roux
patent: 4805932 (1989-02-01), Imhof et al.

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