GB639074A - Improvements in or relating to the injection of cement grout and like materials in cementation operations - Google Patents

Abstract

639,074. Filling holes in roads. WHITLEY MORAN & CO., Ltd. Dec. 20, 1947, No. 33736. [Class 107] [Also in Group XXVIII] A device for feeding flowable materials such as cement grout into bores for cementation operations consists of a pipe 1 having an abutment 2 at one end, a sealing ring or washer 6, e.g. of rubber, surrounding the pipe 1 adjacent said abutment 2 and compressing means including a displaceable abutment 7 adapted to compress said ring 6 against the abutment 2 to expand the ring 6 radially and thus to form a seal between the pipe 1 and a bore into which it is inserted. The abutment 7 is at the end of a sleeve 8 which slides over the pipe 1 threaded at 3 for connection thereto of a feed hose 4 through a cock 5. The sleeve is adapted at its upper end to co-operate with a toggle mechanism to compress the sealing ring between the abutments 2 and 7. The end of the sleeve 8 or a loose washer disposed between the said end and the sealing ring 6 may act in place of the abutment 7. The toggle mechanism embodies a pair of levers 14 with spaced down-turned flanges each pivoted at points 16 on the upper flange 11a of a bracket 11 screwed to the pipe 1, and also pivoted to one end of a short link 18 at 17 or a pair of parallel links, which is or are pivoted at the other end or ends to the flange 12a of the lower bracket 12, displaceable along the pipe to apply a thrust to the sleeve 8 by downward movement of the levers 14, when the toggles may be automatically locked. By adjustment of the longitudinal position of the upper bracket 11 threaded to the pipe the degree of compression to be applied to the ring 6 can be adjusted and so the radial expansion of the ring 6 controlled. A pair or more of sealing rings, whose inner faces are chamfered or tapered, may be employed. The abutment flanges are then oppositely conical, and a wedge-shaped or conical intermediate ring is arranged between the two sealing rings. In another arrangement two or more sealing rings are disposed one above the other with flat washers therebetween. The upper flange may be located beneath and adapted for abutment with a collar, by way, if desired, of a thrust ring, said collar being threaded on the pipe 1 and having at least one handle for rotation.