GB2247161A - Electrical trigger control of water jet - Google Patents

Electrical trigger control of water jet Download PDF

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Publication number
GB2247161A
GB2247161A GB9018437A GB9018437A GB2247161A GB 2247161 A GB2247161 A GB 2247161A GB 9018437 A GB9018437 A GB 9018437A GB 9018437 A GB9018437 A GB 9018437A GB 2247161 A GB2247161 A GB 2247161A
Authority
GB
United Kingdom
Prior art keywords
high pressure
water
lance
pressure pump
control lever
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9018437A
Other versions
GB9018437D0 (en
Inventor
Shaun Waddingham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9018437A priority Critical patent/GB2247161A/en
Publication of GB9018437D0 publication Critical patent/GB9018437D0/en
Publication of GB2247161A publication Critical patent/GB2247161A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B08B3/028—Spray guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor

Landscapes

  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The electrical trigger control of a high pressure water jet pumping system (e.g. fig 1) comprises a high pressure pump (2) transmitting water through hose (3) to hand held lance (8) and nozzle (9). The process of pumping of water from high pressure pump (2) into hose (3) may be activated / deactivated by depression of lever (7) which actions switch (6) within trigger assembly (5) sending the appropriate electrical signal back to pump (2) via cable (4). <IMAGE>

Description

Electrical Trigger Control This invention relates to the method of control of a mobile hand operated high pressure water jet pumping system. Such a piece of equipment may be used, for example, for the cutting and removal of concrete, removal of coatings and debris from concrete and steel surfaces or for general cleaning of surfaces.
Systems of this kind have been proposed where water is pumped from a high pressure pump, comprising of an engine or prime mover attached to a suitable high pressure pump the water then being transmitted via a high pressure hose to the cutting nozzle which is mounted on the end of a hand held lance, the operator control of the water supply to the nozzle being by means of a hand operated trigger control lever, mounted on the back of the said lance.
In past inventions the trigger normally operated a mechanical water valve set in the trigger body. This has several undesirable characteristics of which all are detrimental to safety. Using this type of control the water would be held pressurised in the hose whilst not passing water to the nozzle, a danger if a hose should fail. The trigger would also require large operational forces to overcome the pressure in the valve, and would give rapid connection of the lance and nozzle to full pressure in the line - hence a large operator stress level and a related danger aspect.
This invention seeks to overcome the above problems by control of the emission of the high pressure water by means other than that described above.
In accordance with the invention there is provided a high pressure pump, which provides water at high pressure via a flexible hose to a hand held lance such a lance comprising of a nozzle/nozzles and a hand operated trigger mechanism, this mechanism being an electrical switch connected via an electrical cable to the high pressure pump, and connected in such a manner that whilst the trigger is released water pressure and flow exiting from the nozzle on the said lance is reduced or stopped.
The embodiment of the invention will now be described by reference to an example as in fig.l which is a schematic jet cutting system. Water is taken from a suitable supply (1) into the high pressure pump (2). The pump then provides high pressure delivery of water via hose (3) to the high pressure lance tube (8), and subsequently the nozzle (9). It is a feature of this invention that the process of pumping water by (2) into hose (3) may be activated or de-activated by depression of lever (7) mounted within the trigger assembly (5). This would work by lever (7) actioning a switch (6) within trigger assembly (5) and sending the appropriate electrical signal back to the high pressure pump (2)- via cable (4).
It may be a further feature of this invention that the switch (6) may be of the form, for example, of a proximity sensor, using a contained inductive sensing circuit to sense the proximity of the trigger action without a direct mechanical linkage to switch (6).

Claims (2)

1. A high pressure pumping system consisting of a high pressure pump supplying water via a suitable hose to a hand held lance, the said lance having an attached high pressure nozzle / nozzles and control lever, and wherein the control lever can be used to activate / deactivate the process of pumping water by the high pressure pump to the said lance, and where the control lever controls the said activation / deactivation by means of an electrical switch operated by the lever and an appropriate electrical signal transmitted by cable to the high pressure pump.
2. A high pressure water jet pumping system as in claim 1, where the electrical switch operated by the control lever may be of the 'proximity sensor' type incorporating a sensing circuit and without mechanical contacts inside the switch.
GB9018437A 1990-08-22 1990-08-22 Electrical trigger control of water jet Withdrawn GB2247161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9018437A GB2247161A (en) 1990-08-22 1990-08-22 Electrical trigger control of water jet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9018437A GB2247161A (en) 1990-08-22 1990-08-22 Electrical trigger control of water jet

Publications (2)

Publication Number Publication Date
GB9018437D0 GB9018437D0 (en) 1990-10-03
GB2247161A true GB2247161A (en) 1992-02-26

Family

ID=10681062

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9018437A Withdrawn GB2247161A (en) 1990-08-22 1990-08-22 Electrical trigger control of water jet

Country Status (1)

Country Link
GB (1) GB2247161A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019892A1 (en) * 1997-10-10 1999-04-22 Invasatec, Inc. Control device for providing a variable control signal to a fluid-supplying machine
EP1980330A3 (en) * 2007-04-12 2011-06-08 J. Wagner GmbH Spray gun

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274553A (en) * 1978-07-26 1981-06-23 Frank'sche Eisenwerke Ag Safety spraying device
US4585168A (en) * 1983-04-13 1986-04-29 Woma Apparatebau High pressure liquid installation
US4593858A (en) * 1985-04-01 1986-06-10 Butterworth, Inc. Fail-safe high pressure fluid delivery system
EP0312862A2 (en) * 1987-10-17 1989-04-26 Vdb-Patent Ag High pressure cleaning device
EP0420473A1 (en) * 1989-09-23 1991-04-03 Black & Decker Inc. Hand-held high-pressure cleaner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274553A (en) * 1978-07-26 1981-06-23 Frank'sche Eisenwerke Ag Safety spraying device
US4585168A (en) * 1983-04-13 1986-04-29 Woma Apparatebau High pressure liquid installation
US4593858A (en) * 1985-04-01 1986-06-10 Butterworth, Inc. Fail-safe high pressure fluid delivery system
EP0312862A2 (en) * 1987-10-17 1989-04-26 Vdb-Patent Ag High pressure cleaning device
EP0420473A1 (en) * 1989-09-23 1991-04-03 Black & Decker Inc. Hand-held high-pressure cleaner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019892A1 (en) * 1997-10-10 1999-04-22 Invasatec, Inc. Control device for providing a variable control signal to a fluid-supplying machine
EP1571519A3 (en) * 1997-10-10 2009-09-09 ACIST Medical Systems, Inc. Control device for providing a variable control signal to a fluid-supplying machine
EP1980330A3 (en) * 2007-04-12 2011-06-08 J. Wagner GmbH Spray gun

Also Published As

Publication number Publication date
GB9018437D0 (en) 1990-10-03

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)