Reciprocating pump with sealing collar arrangement
AssigneeMaruyama Mfg. Co., Inc.
InventorToshiro Nakanishi
Life of this patent
Estimating the term…
Abstract
An objective is to provide a reciprocating pump kept from lowering its performances, while restraining the cost from increasing. Collars 14, 20, 21 made of a material more excellent in resistance to corrosion than a manifold 3 are interposed between the manifold 3 and sealing members 10, 22, 23 for liquid-tightly sealing the manifold 3, so as to prevent the parts in contact with the sealing members 10, 22, 23 from being corroded by a liquid for use, and fully exhibit sealing functions, thereby preventing leakage from occurring in a pump chamber 4 and the pressure oscillation from being increased by the leakage, while the collars 14, 20, 21 made of the material excellent in resistance to leakage are used only in the parts in contact with the sealing members 10, 22, 23.
Claims14
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.
A reciprocating pump, comprising:
- a manifold formed from brass having a pump chamber and a channel that connects the pump chamber and an exterior of the pump chamber;
- a plunger, mounted in the pump chamber, that reciprocates therein for sucking a liquid containing a detergent or wax into the manifold and discharging the liquid therefrom through the channel;
- 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, that is liquid-tight and provided on a part of the side wall of the pump chamber;
- and
- a sealing member, provided between the cylinder collar and the plunger, for providing a liquid-tight seal,
- wherein the sealing member, which is arranged on an inner periphery of the cylinder collar, is in no contact with the pump chamber,
- wherein the cylinder collar is press-fit into the manifold,
- wherein no sealing member is arranged between the cylinder collar and the manifold, and
- wherein, in response to the reciprocation of the plunger, the sealing member is repeatedly pressurized and depressurized in the manifold.
A reciprocating pump comprising:
- a manifold formed from brass having a pump chamber and a channel that connects the pump chamber and an exterior;
- a plunger, mounted in the pump chamber, that reciprocates therein for sucking a liquid containing a detergent or wax into the manifold and discharging the liquid therefrom through the channel;
- a valve member provided in the channel;
- a valve 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, that is liquid-tight and provided on a part of the inner face of the channel;
- and
- a sealing member, provided between the valve collar and the valve member, for providing a liquid-tight seal,
- wherein the sealing member, which is arranged on an inner periphery of the valve manifold collar, is in no contact with the manifold,
- wherein the valve collar is press-fit into the manifold,
- wherein no sealing member is arranged between the valve collar and the manifold, and
- wherein, in response to the reciprocation of the plunger, the sealing member is repeatedly pressurized and depressurized in the manifold.
Dependencies are inferred from the claim text.