Liquid flow valve system

Claim 2

A liquid pumping assembly, comprising: a pump having intake and discharge ports, means adapting said intake port for drawing liquid from a liquid source, a discharge liquid path in fluid communication with the discharge port of said pump and with an outlet adapted for connEction of a liquid discharge hose, said discharge path including a valve operable between open and closed positions, a bypass liquid path in fluid communication from the discharge port of said pump to its intake port, said bypass path including a bypass valve operable between open and closed positions, mechanical means connecting said discharge and bypass valves for operating said valves as one unit, said discharge valve being open only while said bypass valve is closed, and, conversely, said discharge valve being closed only while said bypass valve is open, said mechanical operating means additionally controlling the discharge and bypass valves in a manner that when said discharge valve is initially opened said bypass valve is simultaneously closed, thereby to create a rapid liquid pressure increase in the liquid discharge path that quickly drives the discharge valve fully open.

Claim 3

A liquid pumping assembly according to claim 1 which additionally comprises means associated with said mechanical connecting means for resilient biasing said discharge valve to a closed position and thus to bias said bypass valve to an open position.

Claim 4

A liquid pumping assembly according to claim 2 which additionally comprises a liquid hose attached to said discharge outlet, and a valve installed on said hose that is operable between open and closed positions, whereby opening said hose valve to the atmosphere causes said discharge valve to move to its open position while the bypass valve moves to its closed position.

Claim 5

A liquid pumping assembly according to claim 1 wherein said mechanical connecting means includes a rod extending between said liquid discharge path and said liquid bypass path, one end of said rod located within the bypass path forming said bypass valve and an enlarged flange surrounding said rod within said discharge liquid path forming said discharge valve.

Claim 6

A liquid pumping assembly according to claim 1 which additionally comprises a motor operably connected for driving said pump, said motor having a speed control regulator that is operably connected with said mechanical connecting means in a manner to drive said motor at a low speed when said bypass valve is in an open position.

Claim 7

A liquid pumping assembly according to claim 1 wherein said bypass liquid path includes means for controlling the size of said passage, thereby to permit control of liquid pressure against said discharge valve when in its closed position, whereby the speed of response of said valve moving to its open position may be controlled.

Claim 8

A liquid pumping assembly according to claim 3 wherein said bypass liquid path includes a normally closed check valve which opens upon fluid pressure therein reaching a certain threshold value above normal atmospheric pressure, whereby pump priming is facilitated.

Claim 9

A liquid pumping assembly, comprising: a housing, a liquid receiving inlet to said housing, a primary liquid passage within said housing forming at least one sharp turn of substantially 90* between said liquid inlet and a primary liquid outlet opening, a flange the size of said primary liquid passage and attached to a rod having a diameter significantly less than the size of said primary liquid passage for moving with said flange between extreme positions of closing said primary liquid passage by engaging all sides thereof and opening said primary liquid passage by moving to a position in said substantially right angle turn that allows fluid to travel along said primary liquid passage around said turn, a secondary liquid passage within said housing and in fluid communication with said liquid receiving inlet for discharging liquid through a secondary opening, said rod extending out of said primary liquid passage through a liquid-tight opening therewith, one end of said rod forming a secondary valve in said secondary liquid passage in a manner that said primary valve is open only when said secondary valve is closed, resilient Means associated with said rod for biasing said primary valve in the closed position and said secondary valve in an open position, whereby the primary valve opens and the secondary valve closes when said primary outlet opening is opened to atmosphere as a result of a desire to obtain liquid flow therefrom, a liquid pump having a discharge port communicating with the liquid receiving inlet of said valve assembly, and an intake port of said pump connectable to receive liquid from a liquid source and said intake port connected within said housing to said secondary outlet opening, whereby a quantity of liquid circulates through said secondary liquid passage in a bypass path and through said pump when said secondary valve is open.

Claim 10

A liquid pumping assembly, comprising: a housing, a liquid receiving inlet to said housing, a primary liquid passage within said housing forming at least one sharp turn of substantially 90* between said liquid inlet and a primary liquid outlet opening, a flange the size of said primary liquid passage and attached to a rod having a diameter significantly less than the size of said primary liquid passage for moving with said flange between extreme positions of closing said primary liquid passage by engaging all sides thereof and opening said primary liquid passage by moving to a position in said substantially right angle turn that allows fluid to travel along said primary liquid passage around said turn, a secondary liquid passage within said housing and in fluid communication with said liquid receiving inlet for discharging liquid through a secondary opening, said rod extending out of said primary liquid passage through a liquid-tight opening therewith, one end of said rod forming a secondary valve in said secondary liquid passage in a manner that said primary valve is open only when said secondary valve is closed, resilient Means associated with said rod for biasing said primary valve in the closed position and said secondary valve in an open position, whereby the primary valve opens and the secondary valve closes when said primary outlet opening is opened to atmosphere as a result of a desire to obtain liquid flow therefrom, a liquid pump having a discharge port communicating with the liquid receiving inlet of said valve assembly, and an intake port of said pump connectable to receive liquid from a liquid source and said intake port connected within said housing to said secondary outlet opening, whereby a quantity of liquid circulates through said secondary liquid passage in a bypass path and through said pump when said secondary valve is open.

Claim 11

The liquid pumping assembly according to claim 8 wherein said secondary liquid passage includes at least one sharp turn of substantially 90* positioned therein, said rod one end being positioned to seal off said secondary liquid passage by movement thereinto at said sharp turn of the secondard liquid passage.

Claim 12

The liquid pumping assembly according to claim 8 wherein said flange is movable a distance along said primary liquid passage further than necessary to close off said passage, thereby permitting said resilient means to hold the flange in a position requiring movement thereof a distance before said secondary liquid passage is opened.

Claim 13

The liquid pumping assembly according to claim 10 which additionally comprises an internal combustion engine driving said pump, said internal combustion engine having a throttle, and means operably connected between said engine throttle and said rod in a manner to hold the maximum speed of said engine at a minimum when said primary valve is in its closed position and the secondary valve in the open position.

Claim 14

A liquid pumping assembly, comprising: a liquid pump having intake and outlet ports, means adapting said intake port for drawing liquid from a liquid reservoir, a discharge liquid path in liquid communication between the discharge port of said pump and an outlet for controllably discharging liquid therefrom, a bypass liquid path in liquid communication between the outlet of said pump to the intake of said pump, said bypass liquid path being established without going through a liquid reservoir, a valve positioned within said discharge liquid path and operable between positions opening and closing said discharge path to liquid flow, a valve positioned within said bypass liquid path and operable between positions opening and closing said bypass path to liquid flow, and means interconnecting said discharge and bypass valves for moving them together in a manner that when one of said valves initially closes off its associated liquid path the other valve is simultaneously opening up its associated liquid path, thereby causing simultaneous liquid pressure changes in the liquid paths that promote fast movement of said valves.

Claim 15

A liquid pumping assembly, comprising: a liquid pump having intake and outlet ports, means adapting said intake port for drawing liquid from a liquid reservoir, a discharge liquid path in liquid communication between the discharge port of said pump and an outlet for controllably discharging liquid therefrom, a bypass liquid path in liquid communication between the outlet of said pump to the intake of said pump, said bypass liquid path being established without going through a liquid reservoir, a valve positioned within said discharge liquid path and operable between positions opening and closing said discharge path to liquid flow, a valve positioned within said bypass liquid path and operable between positions opening and closing said bypass path to liquid flow, and means interconnecting said discharge and bypass valves for moving them together in a manner that when one of said valves initially closes off its associated liquid path the other valve is simultaneously opening up its associated liquid path, thereby causing simultaneous liquid pressure changes in the liquid paths that promote fast movement of said valves.

Claim 16

The liquid pumping assembly according to claim 12 wherein each of the discharge and bypass liquid paths contains a sharp substantially right angle turn, each of said discharge and bypass liquid path valves movable between their opened and closed positions in a direction of one of the legs of their respective right angle liquid path sections, each of said valves closing off their respective liquid paths when moved into said one leg of their associated right angle section and opening said liquid path when the valve is moved out of said one leg.

Claim 17

The liquid pump assembly according to claim 12 which additionally comprises: an output control valve for selectively opening or closing said outlet to liquid flow, and resilient means normally biasing said discharge path valve to its closed position and said bypass path valve to its open position, the spring constant of said resilient means being of a low magnitude so that said discharge path valve quickly moves to its open position when said output valve is opened To permit liquid flow through said outlet.