Patent ID: 8123505

Claim:
A reciprocating pump comprising sealing members for liquid-tightly sealing the inside of a manifold formed from brass, wherein a reciprocating member performs a pumping action for sucking a liquid containing a detergent or wax into the manifold and discharging the liquid therefrom by reciprocating; wherein a valve collar and a cylinder collar made of stainless steel or titanium having a higher resistance to corrosion than the manifold and a higher resistance to wear than the manifold are liquid-tightly attached to an inner face of the manifold; wherein one of the sealing members, which is arranged on an inner periphery of the valve collar, is liquid-tightly in contact with the valve collar and in no contact with the manifold; wherein the one of the sealing members is arranged between the valve collar and a valve member, for providing a liquid-tight seal, and no sealing member is arranged between the valve collar and the manifold; wherein another one of the sealing members, which is arranged on an inner periphery of the cylinder collar, is liquid-tightly in contact with the cylinder collar and in no contact with the manifold; wherein the another one of the sealing members is arranged between the cylinder collar and a plunger, for providing a liquid-tight seal; and wherein, in response to the reciprocation of the reciprocating member, the sealing members are repeatedly pressurized and depressurized in the manifold.