Abstract: A liquid supply system with a pump for discharging fixed amounts of liquid composed of a liquid supply vessel which holds a liquid therein; a cylinder device composed of a cylinder cover and a cylinder with a bottom portion having a piston hole, a first liquid suction hole with a liquid suction valve and a second liquid suction hole; a piston device which is slidably disposed within the cylinder, including a piston with a liquid suction inlet and a liquid inlet valve, and a valve-pressing member, a piston cover provided above the piston to form an inner space therebetween to hold the liquid therein, a piston shaft which, in a sealed state, passes through the piston hole formed in the bottom portion of the cylinder, and is integrally connected with the piston in such a manner as to slidably move the piston device along the inner side of the cylinder when pressed upward or downward, the piston shaft including herein a liquid discharge conduit which is connected to the inner space of the piston device and from w

Abstract: A washer pump for sending, to a nozzle under pressure, cleaning liquid introduced thereinto from an inlet thereof provided in the interior of a washer tank and discharged from an outlet thereof is designed to allow an individual to determine the level of cleaning liquid in the washer tank. The washer pump includes: a cylindrical peripheral wall formed by extending the peripheral wall of the inlet upward so that the upper end of the cylindrical peripheral wall serves as the opening thereof; and a flow passage serving as a through-hole provided on the cylindrical peripheral wall at a lower portion thereof. Preferably, the through-hole is provided on the cylindrical peripheral wall such that the height of the through-hole is almost the same as that of the inlet or below the inlet. The through-hole may consist of a groove vertically extending in the direction from the upper end of the cylindrical peripheral wall toward a lower portion thereof.

Abstract: A dispensing unit retainer is formed with a tapered surface into which a dispensing unit, such as a modular pump or the like, is permanently retained with an interference fit. Axially inward movement of the modular pump is limited by a shoulder formed at the inner end of the tapered surface. The retainer can be integrally formed with a container. Once installed in the retainer, the dispensing unit cannot be removed without damage to the retainer or dispensing unit. An upstanding annular wall concentrically surrounding the surface includes an inwardly extending projection for sealing the discharge orifice of the dispensing unit actuator and two axially extending openings cooperating with the actuator to inhibit accidental discharge of the dispensing unit.