4 results about "Face seal" patented technology

The invention discloses a closed scraper device used for a gravure printing machine. The closed scraper device used for the gravure printing machine comprises a stand and a closed scraper cavity arranged on the stand, an adjustable scraper is arranged at the concave surface of the upper part of the closed scraper cavity, a fixed scraper is arranged at the lower part of the closed scraper cavity, the adjustable scraper is capable of moving along the concave surface of the closed scraper cavity, and a head face sealing block is arranged at each of the joint between the adjustable scraper and a printing plate roller and the joint between the fixed scraper and the printing plate roller; the adjustable scraper, closed scraper cavity, fixed scraper, printing plate roller and head face sealing blocks jointly form a closed cavity in a surrounding mode. The closed scraper device used for the gravure printing machine solves the problems that an existing open type scraper device is low in printing quality and large in printing ink consumption due to solvent evaporation in printing ink storage.

A mechanical face seal includes a rotating counter ring having a sealing surface and two radial planes. Each of the radial planes is associated with a clamping cam. A stationary face seal ring has a sealing surface opposite from the sealing surface of the counter ring. The sealing surfaces. of the counter ring and the face seal ring bear against each other.

The invention relates to the field of medical instruments, in particular to a self-service type injection gun. The self-service type injection gun comprises a sleeve shell, an injection device and a pushing device. The injection device comprises an elastic piece, an injection needle, a syringe, a piston and a remaining needle. Sealed contact is adopted between the wall of the lower end of the syringe and the injection needle and between the piston and the side wall of the syringe, so that a sealed cavity is formed in an inner cavity, below the piston, of the syringe. The upper end face of the injection needle is sealed. A through hole is formed in the side wall of the injection needle. The through hole is located in the sealed cavity. The pushing device comprises pressing and feeding pieces and pushing and feeding pieces. One end of each pressing and feeding piece is hinged to the outer wall of the sleeve shell. The outer end of each pushing and feeding device is hinged to the inner surface of the corresponding pressing and feeding piece. Limiting grooves which can be connected with the inner ends of the pushing and feeding pieces in a clamped mode are formed in the outer surface of the side wall of the syringe. The outer end of each pushing and feeding piece penetrates through a hole formed in the side wall of the sleeve shell to be connected with the corresponding limiting groove in the clamped mode. The self-service type injection gun has the advantages of being convenient to carry, easy to operate, accurate in injection and capable of being used for injection on multiple parts of a human body.