DEVICE FOR MORTAR INJECTION INTO CONCRETE CRACKS Russian patent published in 1994 - IPC

FIELD: construction. SUBSTANCE: device has a body made of synthetic material and having an axial channel, a nipple secured to a body end section, and a seal ring. The seal ring has an axial channel, an axial groove, and axial bosses on its external surface. The bosses in the longitudinal plane have the form of a truncated cone with apex facing the axial channel outlet. The free end of the body is provided with a shank. The shank is disposed in a seal ring axial groove. He seal ring material is more elastic than those of the body. The circular bosses have the larger truncated cone base diameter lowering in the direction toward the seal ring axial channel outlet. The lateral surface of the body shank is provided with circular teeth having in longitudinal plane the form of a truncated cone with apex facing the nipple. The seal ring is made of polyethylene or polyurethane. The body is made of a fiber glass reinforced polyamide. EFFECT: enlarged operating capabilities. 4 cl, 3 dwg