Glue injector and the process of injection

Dispensing – Processes of dispensing

Patent

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222389, B67D 542

Patent

active

055181457

ABSTRACT:
The present invention relates to a glue injector for repairing the cracks on concrete and the process of injection, especially in that the glue in the injector is pushed by the gaseous pressure of carbon dioxide produced by the reaction of chemical decomposition into the crack of concrete. An aqueous solution of citric acid is arranged in the pressure chamber on the top of the injector in this invention, a sodium bicarbonate tablet is placed into the pressure chamber through the aperture thereon, and carbon dioxide gas is gradually released by the reaction of chemical decomposition caused by mixing these two media. The increasing gaseous pressure is used to push the piston in the injector, and push the glue in front of the piston into the crack.

REFERENCES:
patent: 3367545 (1968-02-01), Cook
patent: 3405845 (1968-10-01), Cook et al.
patent: 3430731 (1969-03-01), Satzinger
patent: 3842939 (1974-10-01), Satzinger
patent: 4744442 (1988-05-01), Bras et al.
patent: 5035351 (1991-06-01), Moran
patent: 5234140 (1993-08-01), Demarest
patent: 5386883 (1995-02-01), Graf

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