GB418072A - Improvements in or relating to closures for pipes and the like - Google Patents

Abstract

418,072. Stopping pipes. LEAD WOOL CO., Ltd., and MOULTON, F., Snodland, Kent. June 6, 1933, No. 16261. [Class 99 (ii).] The socket end 11 of a pipe formed with external flange-like projections 13 of wedgeshape or having inclined rear surfaces 14 is closed by a stopper 15 provided with hookshaped cramp members 19 adapted to engage said surfaces 14. Fluid tightness is secured by a ring 18 of soft packing which is compressed between the usual flared portion 12 of the socket and a cylindrical internal projection 16 and surrounding surface 17 of the stopper, or alternatively by a cup-leather 23 located upon the inner end of a slidable tube 30 which is centrally mounted in the stopper and is adapted to be connected to a device for supplying or indicating pressure within the pipe, the cup leather being forced by the pressure within the pipe against the internal cylindrical portion 29 of the socket and the face 24 of the stopper. In a modification for use with pipes having an ordinary flange instead of the projections 13, the stopper is secured to the pipe by cramps which engage the outer face of the stopper at one end and extend around and behind the flange at the other and are tightened by wedges forced between the cramps and the back of the flange. Specifications 21845/96, [Class 99], 336,962, [Class 99 (ii)], and 375,869 are referred to.