HANDLE-OPERATED PUMP Russian patent published in 1995 - IPC

FIELD: pump engineering. SUBSTANCE: handle-operated pump has piston and plunger, which are interconnected telescopically, and device for locking the piston constructed as screw pair, coupling nut with a collar, and washer. The screw pair is defined by a disk having a threaded generatrix surface. The disk is coaxially mounted on the plunger from the side of a pivot. The coupling nut can be fastened to the housing. The collar is received in a groove made in the piston. The washer is mounted at the face end of the piston and arrests the axial movement of the collar. EFFECT: improved design. 2 dwg