Pressure wash control system

Claim 2

A pressure washing system comprising a power driven pump having a fluid receiving inlet connected to a fluid directing means and a fluid discharge outlet connected to a fluid discharge means; means are provided to interconnect said fluid directing means with said fluid discharge means to allow fluid to pass therebetween in response to changes in fluid pressure; injector means is mounted to said fluid directing means; said injector means including valve means adapted to alternately assume closed and opened position to provide a flow of at least one chemical from reservoir means into said fluid directing means when said valve means is open, control means mounted to said fluid directing means; said control means comprising a flow switch, positioned to serve fluid flow through said fluid directing means and electrical circuit means; said control means stopping said pump when the flow of fluid through said flow switch is substantially stopped and activating said pump and actuating said valve means to one of its alternate positions when fluid passes through said flow switch.

Claim 3

A pressure washing system as claimed in claim 1, wherein said interconnection means includes a pressure bypass valve means connected to said fluid discharge means and said fluid directing means; said pressure bypass valve means being adapted to allow fluid to flow only from said fluid discharge means to said fluid directing means when a predetermined increase in pressure occurs in the fluid discharge means and flow switch relief means, said flow switch relief means comprising conduit means connected to said fluid discharge means and said fluid directing means, said conduit means including a relief check valve means.

Claim 4

A pressure washer comprising a power driven pump having a fluid receiving inlet and a fluid discharge outlet, a fluid directing means connected to said pump inlet, said fluid directing means comprising conduit means, a flow switch mounted to said conduit means, circuit means connected to said flow switch, a regulatoR mounted to said conduit means, said regulator serving to regulate fluid pressure passing through said conduit means and injector means mounted to said conduit means, said injector means being adapted to be operated by said flow switch and said circuit means to selectively add a fluid to said fluid directing means, a fluid discharge means connected to said pump outlet, said fluid discharge means comprising a second conduit means, bypass conduit means mounted to said second conduit means, said bypass conduit means also being connected to said first conduit means, said bypass conduit means being adapted to allow a fluid from said second conduit means to flow into said first conduit means when said fluid is at a predetermined pressure, check valve means mounted to said second conduit means, said check valve means being connected to said first conduit means and adapted to provide for a fluid flow from said first conduit means to said second conduit means when the pump is stopped, and a fluid dispensing means connected to said second conduit means.

Claim 5

A pressure washer comprising a power driven pump having a fluid receiving inlet and a fluid discharge outlet, a fluid directing means connected to said pump inlet, said fluid directing means comprising conduit means, a flow switch mounted to said conduit means, circuit means connected to said flow switch, a regulatoR mounted to said conduit means, said regulator serving to regulate fluid pressure passing through said conduit means and injector means mounted to said conduit means, said injector means being adapted to be operated by said flow switch and said circuit means to selectively add a fluid to said fluid directing means, a fluid discharge means connected to said pump outlet, said fluid discharge means comprising a second conduit means, bypass conduit means mounted to said second conduit means, said bypass conduit means also being connected to said first conduit means, said bypass conduit means being adapted to allow a fluid from said second conduit means to flow into said first conduit means when said fluid is at a predetermined pressure, check valve means mounted to said second conduit means, said check valve means being connected to said first conduit means and adapted to provide for a fluid flow from said first conduit means to said second conduit means when the pump is stopped, and a fluid dispensing means connected to said second conduit means.

Claim 6

A pressure washer as claimed in claim 3, wherein said flow switch and circuit means is adapted to run and stop said pump and selectively control the chemical flow from said injector means.

Claim 7

A pressure washer as claimed in claim 3 wherein said injector means includes reservoir means and a mechanical valve, said mechanical valve being adapted to selectively control fluid flow from said reservoir means.

Claim 8

A pressure washer as claimed in claim 3 wherein said first conduit means has a one-way check valve mounted thereto on the pump side of the regulator, said one-way check valve allowing fluid to pass from said regulator through it while preventing fluid from flowing through it toward said regulator.

Claim 9

A pressure washer as claimed in claim 3, wherein said second conduit means has a suppressor mounted thereto between said pump outlet and said bypass conduit means.

Claim 10

A pressure washer as claimed in claim 3, wherein said injector means comprises injector apparatus, a fluid additive conduit connected to said injector apparatus, solenoid valve means mounted to said fluid additive conduit, mechanical valve means mounted to said fluid additive conduit and at least one tank connected to said fluid additive conduit.

Claim 11

A pressure washer comprising a power driven pump having an inlet means and an outlet means, a first conduit means adapted to connect said inlet means to a source of fluid, control means mounted to said first conduit means, said control means comprising a flow switch and circuit means connected to said flow switch, a regulator secured to said first conduit means to regulate the pressure of fluid passing therethrough, injector means mounted to said first conduit means, said injector means comprising an aspirator apparatus a fluid supply conduit connected to said aspirator apparatus, a reservoir connected to said fluid supply conduit, solenoid valve means mounted in said supply conduit; said solenoid valve means being adapted to be opened and closed by said control means to allow fluid to flow from said reservoir into said aspirator apparatus, a second conduit means secured to said pump outlet; a pulsation reducer mounted to said second conduit means to control the flow of fluid discharged from said pump outlet, bypass valve means mounted to said second conduit means, said bypass valve means being connected to said first conduit means, to carry fluid from said second conduit means to said first conduit means upon a predetermined fluid pressure increase at said bypass valve, check valve means interconnecting said first conduit means and said second conduit means, said check valve means being adapted to allow flow of fluid only from said first conduit means to said second conduit means, and fluid dispensing means secured to said second conduit means.

Claim 12

A pressure washer comprising a power driven pump having an inlet means and an outlet means, a first conduit means adapted to connect said inlet means to a source of fluid, control means mounted to said first conduit means, said control means comprising a flow switch and circuit means connected to said flow switch, a regulator secured to said first conduit means to regulate the pressure of fluid passing therethrough, injector means mounted to said first conduit means, said injector means comprising an aspirator apparatus a fluid supply conduit connected to said aspirator apparatus, a reservoir connected to said fluid supply conduit, solenoid valve means mounted in said supply conduit; said solenoid valve means being adapted to be opened and closed by said control means to allow fluid to flow from said reservoir into said aspirator apparatus, a second conduit means secured to said pump outlet; a pulsation reducer mounted to said second conduit means to control the flow of fluid discharged from said pump outlet, bypass valve means mounted to said second conduit means, said bypass valve means being connected to said first conduit means, to carry fluid from said second conduit means to said first conduit means upon a predetermined fluid pressure increase at said bypass valve, check valve means interconnecting said first conduit means and said second conduit means, said check valve means being adapted to allow flow of fluid only from said first conduit means to said second conduit means, and fluid dispensing means secured to said second conduit means.

Claim 13

A pressure washer as claimed in claim 9, wherein a one-way check valve is positioned in said first conduit means on the pump inlet side of said regulator and a relieF check valve is mounted to said second conduit means.

Claim 14

A pressure washer as claimed in claim 9, wherein a mechanical valve is mounted to said fluid supply conduit to selectively allow different chemicals to pass into said fluid supply conduit from a plurality of chemical reservoirs.