초록 ▼

The invention relates to a diaphragm pump for dispensing or metering purposes, for example for use in liquid soap dispensers. The pressure chamber (7) of the pump is defined by a fixed wall (6) and the diaphragm (1). A check-valve on the inlet side towards a storage vessel (11) forms a cylindrical f

The invention relates to a diaphragm pump for dispensing or metering purposes, for example for use in liquid soap dispensers. The pressure chamber (7) of the pump is defined by a fixed wall (6) and the diaphragm (1). A check-valve on the inlet side towards a storage vessel (11) forms a cylindrical flange (4) movable in a groove (5) and sealing against the outer surface thereof. Arranged in a spout (2) passing through the diaphragm is an oblique wall (3), which is slotted through a short distance around its periphery, thereby to form a seal against the suction of air into the pressure chamber (7). The diaphragm (1) is arranged to be compressed by a pressure body (9) provided on a lever (8).

대표청구항 ▼

A lever-operated diaphragm pump for fluid dispensing apparatus mounted beneath a fluid-storage vessel in fluid communication therewith, said diaphragm pump comprising: a lever; a resilient cup-shaped diaphragm having a cavity and including a discharge spout which is formed integrally with the diaphr

A lever-operated diaphragm pump for fluid dispensing apparatus mounted beneath a fluid-storage vessel in fluid communication therewith, said diaphragm pump comprising: a lever; a resilient cup-shaped diaphragm having a cavity and including a discharge spout which is formed integrally with the diaphragm, said discharge spout having a fluid passage extending from said cavity and including an obliquely positioned resilient wall which is firmly connected along the greater part of its periphery with said discharge spout; a plate element made of a nonresilient material having a bottom surface and rigidly disposed above said cavity, said bottom surface and said cavity together forming a pressure chamber, said plate element having at its bottom surface an annular groove which is in fluid communication with said fluid-storage vessel; a cylindrical flange provided on that side of said cup-shaped diaphragm which is remote from said discharge spout; said cylindrical flange having a rim of such dimension which in use needs to be biased in order to be accommodated during assembly along a part of its height within said annular groove arranged in said plate element, whereby upon operation of said lever, said cup-shaped diaphragm is urged to move towards said plate element, thereby increasing fluid pressure in said pressure chamber, in use, to disperse a quantity of said fluid from said pressure chamber through said discharge spout by dilating said obliquely positioned resilient wall.