Sealant injector
AssigneeMitsubishi Kinzoku Kabushiki Kaisha
InventorsKazuhiko Tabei, Sadao Saito, Shunichi Kai
Life of this patent
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Abstract
A sealant injector for use in repair is provided with a sealant nozzle formed in a forward end of an injector body. A piston is slidably fitted in the injector body, and cooperates with the forward end of the injector body to define therebetween a sealant chamber capable of being filled with sealant. A coil spring is arranged within the injector body, and is provided with such a shape memory effect that when heated, the coil spring biases the piston toward the forward end of the injector body to inject the sealant through the sealant nozzle. A heating unit is associated with the injector body, for heating the coil spring.
Claims10
A portable sealant injector for use in repair of cracks in concrete structures, comprising:
- an injector body having a forward end formed with a sealant nozzle and having a rearward open end;
- a piston releasibly fitted in said injector body by sliding movement relative thereto, said piston cooperating with the forward end of said injector body to define therebetween a sealant chamber capable of being filled with sealant;
- a coil spring of a shape-memory alloy releasibly arranged within said injector body, for biasing said piston means toward the forward end of said injector body, when heated, to inject the sealant within said sealant chamber through said sealant nozzle;
- a heating unit releasibly associated with said injector body, for heating said coil spring;
- and
- a cap detachably mounted on said rearward open end of said injector body.
Dependencies are inferred from the claim text.