Abstract: A pump system includes a pump housing defining a plurality of pump bores, a plurality of pumping members, and a plurality of valves positioned within the pump housing. Each of the valves includes a valve body defining a plurality of inlets, arranged to receive a low pressure fluid, a suction valve coupled to the valve body and movable between a closed position and an open position, the suction valve including a suction valve closing member having a conical contact surface having a large diameter portion, and a first elastomeric member positioned adjacent the large diameter portion, and a discharge valve coupled to the valve body and movable between a closed position and an open position, the discharge valve including a discharge valve closing member having a conical contact surface having a large diameter portion, and a second elastomeric member positioned immediately adjacent the large diameter portion.

Abstract: A pump system includes a pump housing defining a plurality of pump bores, a plurality of pumping members, and a plurality of valves positioned within the pump housing. Each of the valves includes a valve body defining a plurality of inlets, arranged to receive a low pressure fluid, a suction valve coupled to the valve body and movable between a closed position and an open position, the suction valve including a suction valve closing member having a conical contact surface having a large diameter portion, and a first elastomeric member positioned adjacent the large diameter portion, and a discharge valve coupled to the valve body and movable between a closed position and an open position, the discharge valve including a discharge valve closing member having a conical contact surface having a large diameter portion, and a second elastomeric member positioned immediately adjacent the large diameter portion.

Abstract: An adjusting assembly adjustably coupling (1) a hand grip to a barrel of a water jetting gun or (2) a shoulder stock to a supply tube of a water jetting gun. The adjusting assembly includes a cam pin. The cam pin (1) couples to said grip and is proximate the barrel or (2) couples to the shoulder stock and is proximate the supply tube. A knob is rotatably coupled to the cam pin. A water jetting gun has a body with an access port leading into a valve cartridge chamber. An adaptor extends through said access port. In the operable state, the adaptor is removable from the body by a person gripping a head of the adaptor with its hand and unscrewing the adaptor by hand without the aid of a hand tool.

Abstract: A valve body has a first main channel, a second main channel and a plurality of inlet channels. Each inlet channel has a respective first and a respective second opening and a fluid pathway extending between its respective first opening and its respective second opening. Each first opening provides an entry into its respective pathway and provides an entry into the valve body. Each second opening provides an exit from its respective pathway into the first main channel. A suction valve seat delimits a first outlet. The first outlet opens into the first main channel. The suction valve seat has a continuous valve seating surface without any through channels opening therethrough. A discharge valve seat delimits a second outlet. The second outlet opens into the second main channel.

Abstract: A coupling for a pump connects a plunger to a plunger adaptor. The coupling provides a space between an end of the plunger and an end of the adaptor. Upon disconnecting the plunger from the adaptor, the space provides for removal of the plunger from and through a well of the pump.

Abstract: A coupling for a pump connects a plunger to a plunger adaptor. The coupling provides a space between an end of the plunger and an end of the adaptor. Upon disconnecting the plunger from the adaptor, the space provides for removal of the plunger from and through a well of the pump.

Abstract: An adjusting assembly adjustably coupling (1) a hand grip to a barrel of a water jetting gun or (2) a shoulder stock to a supply tube of a water jetting gun. The adjusting assembly includes a cam pin. The cam pin (1) couples to said grip and is proximate the barrel or (2) couples to the shoulder stock and is proximate the supply tube. A knob is rotatably coupled to the cam pin. A water jetting gun has a body with an access port leading into a valve cartridge chamber. An adaptor extends through said access port. In the operable state, the adaptor is removable from the body by a person gripping a head of the adaptor with its hand and unscrewing the adaptor by hand without the aid of a hand tool.

Abstract: A coupling for a pump connects a plunger to a plunger adaptor. The coupling provides a space between an end of the plunger and an end of the adaptor. Upon disconnecting the plunger from the adaptor, the space provides for removal of the plunger from and through a well of the pump.

Abstract: A coupling for a pump connects a plunger to a plunger adaptor. The coupling provides a space between an end of the plunger and an end of the adaptor. Upon disconnecting the plunger from the adaptor, the space provides for removal of the plunger from and through a well of the pump.

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.

Abstract: A high pressure regulator is provided with a valve member, a seat member, and an actuator. The axial position of the seat member may be selectively fixed with respect to the body. The valve member is axially moveable with respect to the seat member, and includes a flange member for engaging a shoulder surface on the body for limiting movement of the sealing member relative to the seat member. The sealing member preferably has a very slight taper of less than 10.degree. for maximizing the sealing area with the seat member. A frustro-conical sealing bore in the seat member preferably has a long axial length which is at least 50% of a nominal diameter of the valve member in sealing engagement with an annular seal between the body and the valve member. The cap housing includes an interior deflection surface for deflecting fluid from the seating bore.

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.

Abstract: A control system 10 for monitoring operation of a high pressure plunger pump 12 includes a microprocessor-based controller 40 and a plurality of sensors. Inlet pressure transducers 48 output electrical signals to the controller at intervals of less than 1 millisecond, indicative of the instantaneous inlet pressure to the pump. The controller 40 shuts down pump operation if a number of instantaneous pressure signals within a selected time period exceeds a predetermined value, or if the average inlet pressure signal exceeds a preselected value. The control system 10 is substantially tamperproof, and stored data indicative of tampering, pump startup, pump shutdown, and pump alarm conditions are recorded in a memory for subsequent retrieval and analysis. The serial interface 82 allows communication between the system operating computer 68 and a setup/processing computer 84, which may optionally be remote from the control system by use of a modem.

Abstract: A swivel jet assembly 20 for a fluid distribution system delivers high pressure fluid from a pressurized fluid source to an object to be cleaned. A bearing housing 46 is removably affixed to a swivel body 32 having an inlet port 34 and a fluid transmission passageway 36 therethrough. A hollow shaft 40 has an upstream end positioned within the swivel body and a downstream end extending outward for engagement with a nozzle assembly 30. One or more nozzle jets 116, 118 are supported directly within a nozzle housing, and are angled for causing a torque in response to the high pressure discharged from the nozzle jets. A speed control device within the swivel housing includes a plurality of pins 58 each movable radially outward in response to centrifugal force for engagement with the swivel housing. The swivel is of the in line design, and a thrust bearing 66 is provided within the swivel housing upstream from the swivel speed control device.

Abstract: A swivel jet assembly 20 for a fluid distribution system delivers high pressure fluid from a pressurized fluid source to an object to be cleaned. A bearing housing 46 is removably affixed to a swivel body 32 having an inlet port 34 and a fluid transmission passageway 36 therethrough. A hollow shaft 40 has an upstream end positioned within the swivel body and a downstream end extending outward for engagement with a nozzle assembly 30. One or more nozzle jets 116, 118 are supported directly within a nozzle housing, and are angled for causing a torque in response to the high pressure discharged from the nozzle jets. A speed control device within the swivel housing includes a plurality of pins 58 each movable radially outward in response to centrifugal force for engagement with the swivel housing. The swivel is of the in line design, and a thrust bearing 66 is provided within the swivel housing upstream from the swivel speed control device.

Abstract: A flow control valve is provided of the type useful for positioning in a fluid system between a high pressure pump and a fluid gun. The valve preferably includes a body having first and second flow paths therein, and first and second valve members for controlling the fluid flow through the respective flow paths. The first valve member is biased towards engagement with the first seat, and the second valve member serves to substantially restrict fluid flow through the second flow path to maintain a high pressure level upstream from the valve when the gun is deactivated. The second valve seat member may be easily replaced through an access port provided in the body, and adjustment of the second valve member to control the restricted orifice in the second fluid path is obtained with a rachet mechanism.

Abstract: A flow control valve is provided of the type useful for positioning in a fluid system between a high pressure pump and a fluid gun. The valve preferably includes a body having first and second flow paths therein, and first and second valve members for controlling the fluid flow through the respective flow paths. The first valve member is biased towards engagement with the first seat, and the second valve member serves to substantially restrict fluid flow through the second flow path to maintain a high pressure level upstream from the valve when the gun is deactivated. The second valve seat member may be easily replaced through an access port provided in the body, and adjustment of the second valve member to control the restricted orifice in the second fluid path is obtained with a rachet mechanism.

Abstract: A quick disconnect forming a coupler for high pressure fluid lines that has a first hollow member attached to a second hollow member in fluid-tight relationship with an attachment collar having relatively coarse threads thereon for quick attachment and detachment of the first and second members. A cylindrical stop ring is threadedly attached to one of the members to form a second shoulder in spaced opposition to a first shoulder on one of the members such that the attachment collar can move axially only between the two shoulders. A resilient O-ring is formed in a recess on the second member and engages an annular recess on the attachment collar to resist movement of the attachment collar by vibration.

Abstract: A high pressure pump includes a housing having a pump chamber therein for receiving a pump piston, and a separate pressure housing having a liquid pressure chamber therein in fluid communication with a pump discharge flow line within an outlet housing. A force-transmitting piston is provided within the pressure housing and is movable along an axis substantially coincident with the central axis of the pump piston to place a desired load on each of a plurality of compression rods. The pump may be initially manufactured with the pressure housing, or a separate pressure housing may be added to an existing pump without modifying other pump components. According to the method of this invention, a control valve in a compression line is opened, the pump is activated, then the compression line is closed to maintain the compression rods under load.

Abstract: A power assisted dump valve for a high pressure nozzle system. The dump valve is formed from a unitary housing or valve body. A valve chamber in the valve body includes a slidable piston which, in a first position, closes an atmospheric channel and allows high fluid pressure to be present at the nozzle and, in a second position, opens the atmospheric channel and allows the input fluid to dump to atmosphere to remove the high fluid pressure at the nozzle. A resilient spring, in conjunction with the piston, causes a snap action when the piston closes the atmospheric channel thereby forming a good seal.