초록 ▼

In a valveless pump, a pump body, having a central chamber, is provided with a radially disposed array of pistons movable toward and away from the axis of the pump body. Cylinder heads cooperate with the pistons in controlling fluid movement through the pump. A drive shaft extends axially into the p

In a valveless pump, a pump body, having a central chamber, is provided with a radially disposed array of pistons movable toward and away from the axis of the pump body. Cylinder heads cooperate with the pistons in controlling fluid movement through the pump. A drive shaft extends axially into the pump chamber and includes a surrounding eccentric cam. A linkage assembly pivotally connects the inward end portions of the several pistons with a tether ring surrounding the drive shaft for maintaining the pistons in contact with the eccentric cam and reciprocating the pistons in sequence for moving fluid through conduits sequentially communicating with the several piston cylinders.

대표청구항 ▼

A rotary pump, comprising: pump body means having a central chamber and having a plurality of pump cylinders extending outwardly therefrom in a radial array; a like plurality of pump pistons reciprocable in said pump cylinders; a like plurality of cylinder head means overlying the outward end of sai

A rotary pump, comprising: pump body means having a central chamber and having a plurality of pump cylinders extending outwardly therefrom in a radial array; a like plurality of pump pistons reciprocable in said pump cylinders; a like plurality of cylinder head means overlying the outward end of said cylinder bores and forming a cylinder inlet port and a cylinder outlet port for pumping fluid therethrough; first tubular means connecting a source of fluid with a selected cylinder head inlet port; second tubular means connecting the cylinder head outlet port of the terminal cylinder head of the radial array; conduit means extending between and connecting the remaining cylinder head outlet ports, in sequence, to the remaining cylinder head inlet ports of the radial array; rotary drive means including a drive shaft axially extending into the pump chamber and having a surrounding cam eccentric rotatable therewith; tether means surrounding an intermediate portion of the drive shaft adjacent the cam; means extending between and pivotally connected at its respective end portions with the respective piston and said tether means for sequentially reciprocating said pistons in response to angular rotation of said cam eccentric; and, seal means on the outer end of the respective piston cooperating with the respective cylinder head means for closing said inlet port and said outlet port when the respective piston reaches the outer limit of its travel.