Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Patent
1997-04-11
1999-07-20
Freay, Charles G.
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
921711, F04B 3910
Patent
active
059248530
ABSTRACT:
A high pressure fluid pump 10 supplies fluids to a water blasting or cutting gun 14. The pump 10 is preferably of the in-line type, wherein both an inlet check valve 60 and a discharge check valve 62 move linearly along the axis 40 of the plunger 30 during a complete pumping cycle. A plurality of compression rods 42 are spaced circumferentially about a plunger housing 24, and press the plunger housing into sealing engagement with a suction valve seat 56, press the suction valve seat into sealing engagement with a pump discharge housing 36, press the pump discharge housing into sealing engagement with a discharge end plate 38. Seal ring 66 is provided for sealing between a front planar face 114 of the suction valve seat and a rear planar face 112 of the plunger housing. A weep path 116 extends radially outward from the seal ring 66 to release fluids which pass by the compressible seal ring. Plunger housing 24 is provided with a uniform diameter bore 106 extending axially between the plunger seal 54 and the rear planar face 112. A selected bearing material bushing 82 is provided within the plunger housing 24, and a high temperature seal ring 80 is spaced radially outward from a front portion of the bushing to prevent the bushing from becoming seized to the plunger housing. One or more rod front ends 140 may be interconnected with a corresponding compression rod 42 for attaching a support rod 46 thereto during a pump service operation. An alignment connector 28 structurally interconnects a pump rod 26 and a plunger 30, and further reduces the time and expense of pump maintenance.
REFERENCES:
patent: 3019739 (1962-02-01), Prosser
patent: 3049082 (1962-08-01), Barry
patent: 4551077 (1985-11-01), Pacht
patent: 4878815 (1989-11-01), Stachowiak
patent: 5253987 (1993-10-01), Harrison
patent: 5302087 (1994-04-01), Pacht
patent: 5605449 (1997-02-01), Reed
Bushman Browning
Butterworth Jetting Systems Inc.
Freay Charles G.
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