Patent ID: 6945472

Claim:
Locking tensioning mechanism for a miniaturised high pressure generator with a spring-operated power takeoff and with a variable volume of the liquid to be delivered, essentially comprising two housing parts mounted to be movable relative to one another, an operating spring ( 4 ) which acts as a store for the mechanical energy acting on a spring component, a device for tensioning the operating spring, a first ( 8 ) and a second ( 9 ) stop for the spring component and also a piston connected to the spring component which is moved in the axial direction in a cylinder ( 21 ) as the spring component moves, and a nozzle ( 23 ) at the end of the cylinder, through which the volume of liquid is expelled by the piston, there being at least one additional component with which the position of one of the two stops of the spring component is altered wherein a helical thrust gear is provided as the minimum of one additional component for setting a position of at least one of the first and second stops of the spring component the helical thrust gear for setting a position of at least one of the first and second stops of the spring component comprises at least one rotatable adjusting ring ( 32 , 52 ) which has a handle ( 33 ) protruding from the housing, and wherein the rotatable adjusting ring has a helicoidal surface ( 34 a; 34 b ) which cooperates with a helicoidal surface located opposite it in the axial direction, and the opposing heilcoidal surface is provided on an axially movable component located within the housing.