LEVER-TYPE HAND GUN FOR VISCOUS MASSES (HAND GREASE GUN)

1. A lever-type hand gun for injecting viscous substances, in particular lubricating grease, comprising a high-pressure piston pump with a cylindrical housing (3), a piston (4) and a high-pressure outlet aperture, stationary and movable hand levers (1, 2) which co-operate in the manner of a pistol grip, an articulated tension member (16) between the cylindrical housing (3) and the movable hand lever (2), a return spring (17) for the movable hand lever (2), a connecting socket (19) for the air-tight connection of an air-tight supply container (20) for the viscous substance, which container is made of flexible material, and a low-pressure intake aperture (6), characterised in that the cylindrical housing (3) and the stationary hand lever (1) are formed in one piece, in that the longitudinal extent of the hand levers (1, 2) follows the axis (4') of the piston (4), in that the high-pressure outlet aperture is formed by two apertures offset by 90 degrees, into which a non-return valve (7) and a closure member (13) respectively can be screwed and in that the closure member (13) substantially fills up the high-pressure outlet aperture which is coaxial to the piston (4), in that the connecting socket (19) has a connecting aperture with an outer cylindrical portion (22), a conical portion (23) and an inner cylindrical portion (24), a sawtooth thread being provided in the outer cylindrical portion (22), and in that the supply container (20) is rigid in the vicinity of the connecting socket (19).