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A linear pump includes a housing having a bore and axially spaced apart inlet and outlet. A first check valve is joined to the housing for controlling flow of fluid through the bore. A piston is disposed coaxially in the housing bore for axial translation therein and includes a piston bore and axial

A linear pump includes a housing having a bore and axially spaced apart inlet and outlet. A first check valve is joined to the housing for controlling flow of fluid through the bore. A piston is disposed coaxially in the housing bore for axial translation therein and includes a piston bore and axially spaced apart inlet and outlet. A second check valve is joined to the piston for controlling fluid flow through the piston bore. A linear motor includes a plurality of axially adjoining drive coils disposed in the housing, and a pair of axially spaced apart magnet rings disposed in the piston and spaced radially inwardly of the drive coils for magnetically cooperating therewith to axially oscillate the piston in the housing for cyclically pumping the fluid in turn through the housing and piston inlets and outlets in unidirectional flow through the housing and piston bores.

대표청구항 ▼

[ I claim:] [1.] A pump for pumping a fluid comprising:a housing having a bore disposed in flow communication between a housing inlet and a housing outlet spaced apart at opposite ends of said housing, and a first check valve fixedly joined thereto for controlling flow of said fluid through said hou

[ I claim:] [1.] A pump for pumping a fluid comprising:a housing having a bore disposed in flow communication between a housing inlet and a housing outlet spaced apart at opposite ends of said housing, and a first check valve fixedly joined thereto for controlling flow of said fluid through said housing bore;a piston disposed coaxially in said housing bore for axial translation therein, and having a coaxial bore disposed in flow communication between a piston inlet and a piston outlet axially spaced apart at opposite ends of said piston, and a second check valve fixedly jointed thereto for controlling flow of said fluid through said piston bore; anda linear motor including a plurality of axially adjoining drive coils disposed in said housing, and a pair of axially spaced apart magnet rings disposed in said piston and spaced radially inwardly of said drive coils for magnetically cooperating therewith to axially oscillate said piston in said housing for pumping said fluid in turn through said housing and piston inlets and outlets in unidirectional flow through said housing and piston bores.