IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0275119
(2011-10-17)
|
등록번호 |
US-8727233
(2014-05-20)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Champion Power Equipment, Inc.
|
대리인 / 주소 |
Stetina Brunda Garred & Brucker
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
55 |
초록
▼
A method and apparatus is provided for starting and stopping a high pressure spray washer having a combustion engine driving a pump to provide high pressure fluid to a spray gun activated by a trigger. Pulling the trigger causes water to flow through the nozzle and pump and a sensor by the pump send
A method and apparatus is provided for starting and stopping a high pressure spray washer having a combustion engine driving a pump to provide high pressure fluid to a spray gun activated by a trigger. Pulling the trigger causes water to flow through the nozzle and pump and a sensor by the pump sends a flow start signal to a control module that activates an electric starter when an engine switch is turned on, thus starting the engine when it wasn't running. When the trigger is released flow to the pump stops and the sensor sends a flow stop signal to the control module. If a predetermined time passes before the sensor detects fluid flow to the pump as occurs when the trigger is pulled, then the engine is shut off. The time can be varied to adjust the time between releasing the trigger and shutting off the engine.
대표청구항
▼
1. An apparatus for supplying pressurized fluid to a high pressure washing device for use with a spray gun having a trigger which starts fluid flow regardless of the fluid pressure, the spray gun connected to a high pressure hose, the apparatus comprising: an internal combustion engine in driving co
1. An apparatus for supplying pressurized fluid to a high pressure washing device for use with a spray gun having a trigger which starts fluid flow regardless of the fluid pressure, the spray gun connected to a high pressure hose, the apparatus comprising: an internal combustion engine in driving communication with a fluid pump having a fluid inlet and fluid outlet, the engine having a shut-off switch having a run position and no-run position;an outlet coupling in fluid communication with the pump outlet, the outlet coupling being configured to connect to the hose;an inlet coupling configured to connect to a fluid source and in fluid communication with the inlet of the pump, the pump receiving fluid from the inlet coupling and providing high pressure pressurized-fluid between 1,000 and about 6,000 psi to the outlet coupling when driven by the engine;a sensor located at or between the inlet coupling and outlet coupling of the high pressure washing device and configured to provide a flow start indication in response to a fluid flow at the location of the sensor reflecting the start of fluid flow at the sensor in response actuation of the trigger even when the inlet coupling is in fluid communication with a fluid source without the engine running, the sensor further configured to provide a flow stop indication in response to a change in flow at the location of the sensor reflecting the stoppage of fluid flow at the sensor;an electronic control module having a timer to determine the passage of a predetermined amount of time, the module configured to start the timer to measure the predetermined amount of time in response to a flow stop indication of the sensor, the control module being configured to turn off the engine if the sensor does not provide a flow start indication before the predetermined amount of time has elapsed, the module configured to reset the timer with each flow start indication. 2. The apparatus of claim 1, wherein the sensor comprises a flow sensor switch and wherein the engine has an electronic starter and the control module is configured to start the engine in response to the first flow start indication after determining that the engine switch is turned to the run position and after determining that starting by the flow sensor is enabled. 3. The apparatus of claim 2, wherein the sensor comprises a flow sensor located at or between the inlet to the pump and the fluid inlet coupling. 4. The apparatus of claim 3, wherein the timer is adjustable by the user to vary the predetermined time delay. 5. The apparatus of claim 2, wherein the sensor comprises a flow sensor located by the inlet coupling. 6. The apparatus of claim 2, wherein the timer is adjustable by the user to vary the predetermined time delay. 7. The apparatus of claim 1, wherein the sensor comprises a flow sensor located at or between the inlet to the pump and the fluid inlet coupling. 8. The apparatus of claim 1, wherein the engine has a manual starter. 9. A control system for a high pressure spray washing device having a housing with an engine driving a pump, the housing having an outlet coupling for a hose connecting to a spray gun having a trigger, the housing having an inlet coupling for connecting to a fluid source, with the pump having a pump inlet in fluid communication with the inlet coupling and a pump outlet in fluid communication with the outlet coupling so the pump can receive fluid from the inlet coupling and provide pressurized fluid to the outlet coupling and the spray gun, the control system comprising: a sensor located between the inlet and outlet couplings of the high pressure washing device and providing a flow start indication in response to the starting of flow of fluid at the location of the sensor; and a flow stop indication in response to the stopping of flow of fluid at the location of the sensor, the sensor configured to provide the flow start indication when fluid flows out the outlet coupling in response to activating the spray gun trigger, with the sensor configured to provide the flow stop indication when the spray gun stops spraying in response to releasing the spray gun trigger;a timer activated by the flow stop indication, the timer being reset by a flow start indication, the timer causing a shut off signal to be sent to the engine when a predetermined amount of time passes after a flow stop indication without receiving a flow start indication. 10. The control circuit of claim 9, wherein the timer comprises an electronic circuit configured so that the predetermined amount of time may be set by a user. 11. The control circuit of claim 9, wherein the sensor comprises a flow sensor located at or between the inlet to the pump and the inlet coupling. 12. The control circuit of claim 11, wherein the timer comprises an electronic circuit configured so that the predetermined amount of time may be set by a user and wherein the predetermined amount of time is under 90 seconds. 13. The control circuit of claim 9, wherein the sensor comprises a flow sensor, and wherein the flow start indication is used to activate an electric starter to start the engine. 14. The control circuit of claim 13, wherein the flow sensor is located at or between the inlet to the pump and the inlet coupling. 15. The control circuit of claim 9, wherein the sensor comprises a pressure sensor located between the pump outlet and the outlet coupling. 16. A method for starting and stopping an engine on a high pressure spray washer having housing to which is mounted an engine driving a pump, the housing having an outlet coupling for a hose adapted to be connected to a spray gun during use, the housing further having an inlet coupling adapted to connect to a fluid source, with the pump being in fluid communication with the inlet and outlet couplings to receive fluid from the inlet coupling and provide pressurized fluid to the outlet coupling during use, with fluid flowing through the pump when the trigger is pulled to spray fluid and fluid flow through the pump stopping when the trigger is released to stop the spray of fluid, the method comprising; sensing the fluid flow between the fluid inlet coupling and the fluid outlet coupling of the high pressure spray washer to determine the start of fluid flow to the pump when the trigger is pulled to spray fluid and providing a flow start indication;sensing the fluid flow between the fluid inlet coupling and the fluid outlet coupling of the high pressure spray washer to determine the stopping of fluid flow to the pump and providing a flow stop indication;determining the time that passes between the flow stop indication and the following flow start indication; andshutting off the engine when a predetermined length of time passes after a flow stop signal and no flow start signal has been received. 17. The method of claim 16, wherein the flow sensor is located between the fluid inlet coupling and the inlet to the pump. 18. The method of claim 17, wherein the flow sensor is located by the fluid inlet coupling. 19. The method of claim 16, wherein the sensing step use a flow sensor located at or before the inlet to the pump and the spray washer has an engine switch to shut the engine off, the spray washer further having an electric starter, the method further comprising: determining whether the engine switch has been just turned on, and if the engine is not running, then in response to a flow start indication, activating the electric starter to start the engine running. 20. The method of claim 19, wherein the housing further comprises a switch enabling remote starting by the spray gun, the method further comprising determining whether the switch enabling remote starting by the spray gun is enabled, and if it is enabled activating the electric starter to start the engine running. 21. The method of claim 16, wherein the sensing steps sense fluid flow at a location between the inlet coupling and pump inlet, and wherein the spray washer has an engine switch to shut the engine off and turn the engine off, the spray washer further having an electric starter, the method further comprising: pulling the trigger on the spray gun to start the engine by causing fluid to flow through the pump and past the sensor which provides an indication communicated to a control module, the control module sending a start signal to the electric starter to start the engine.
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