GB2252134A - Hydraulic trigger control of a pump. - Google Patents

Hydraulic trigger control of a pump. Download PDF

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Publication number
GB2252134A
GB2252134A GB9018439A GB9018439A GB2252134A GB 2252134 A GB2252134 A GB 2252134A GB 9018439 A GB9018439 A GB 9018439A GB 9018439 A GB9018439 A GB 9018439A GB 2252134 A GB2252134 A GB 2252134A
Authority
GB
United Kingdom
Prior art keywords
high pressure
water
hose
lance
pump
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Withdrawn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
GB9018439A
Other versions
GB9018439D0 (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 GB9018439A priority Critical patent/GB2252134A/en
Publication of GB9018439D0 publication Critical patent/GB9018439D0/en
Publication of GB2252134A publication Critical patent/GB2252134A/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Withdrawn legal-status Critical Current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

Abstract

A hydraulic trigger assembly (5) controls a high pressure water pump (2) feeding water through a hose (3) to a hand held lance (8) and nozzle (9). The process of pumping of water from high pressure pump (2) into the hose (3) is activated or deactivated by depression of a lever (7) which operates a hydraulic valve (6) within the trigger assembly (5), sending the appropriate hydraulic signal back to high pressure pump (2) via a control hose (4). <IMAGE>

Description

Hydraulic 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 a hydraulic control valve, the said valve being not hydraulically connected to the main water pressure tubing within the lance, but carrying a fluid at much lower pressure than the main water pressure tubing, the said fluid, this fluid being for control purposes and being transmitted between the high pressure pump unit and the said control valve via hydraulic hoses, 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 valve (6) within trigger assembly (5) and sending the appropriate hydraulic signal back to the high pressure pump (2) via hose (4).

Claims (1)

  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 a hydraulic valve, operated by the lever and an appropriate hydraulic signal transmitted by a control hose to the high pressure pump.
GB9018439A 1990-08-22 1990-08-22 Hydraulic trigger control of a pump. Withdrawn GB2252134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9018439A GB2252134A (en) 1990-08-22 1990-08-22 Hydraulic trigger control of a pump.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9018439A GB2252134A (en) 1990-08-22 1990-08-22 Hydraulic trigger control of a pump.

Publications (2)

Publication Number Publication Date
GB9018439D0 GB9018439D0 (en) 1990-10-03
GB2252134A true GB2252134A (en) 1992-07-29

Family

ID=10681064

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9018439A Withdrawn GB2252134A (en) 1990-08-22 1990-08-22 Hydraulic trigger control of a pump.

Country Status (1)

Country Link
GB (1) GB2252134A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107061213A (en) * 2015-11-20 2017-08-18 苏州宝时得电动工具有限公司 Pump unit and Handheld high-voltage cleaning machine
WO2020001601A1 (en) * 2018-06-29 2020-01-02 苏州宝时得电动工具有限公司 Cleaning device assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1334769A (en) * 1970-10-26 1973-10-24 Leistikow J Device for the control of a high pressure pump
GB1447232A (en) * 1972-11-15 1976-08-25 Speed O Klene Equipment Co Ltd Pumping assembly
US4585168A (en) * 1983-04-13 1986-04-29 Woma Apparatebau High pressure liquid installation
US4589825A (en) * 1983-11-25 1986-05-20 Knud Erik Westergaard High-pressure cleaning unit with a bypass valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1334769A (en) * 1970-10-26 1973-10-24 Leistikow J Device for the control of a high pressure pump
GB1447232A (en) * 1972-11-15 1976-08-25 Speed O Klene Equipment Co Ltd Pumping assembly
US4585168A (en) * 1983-04-13 1986-04-29 Woma Apparatebau High pressure liquid installation
US4589825A (en) * 1983-11-25 1986-05-20 Knud Erik Westergaard High-pressure cleaning unit with a bypass valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107061213A (en) * 2015-11-20 2017-08-18 苏州宝时得电动工具有限公司 Pump unit and Handheld high-voltage cleaning machine
USRE49589E1 (en) 2015-11-20 2023-07-25 Positec Power Tools (Suzhou) Co., Ltd Pump unit and handheld high pressure washer
US11708822B2 (en) 2015-11-20 2023-07-25 Positec Power Tools (Suzhou) Co., Ltd. Handheld high-pressure cleaning machine
WO2020001601A1 (en) * 2018-06-29 2020-01-02 苏州宝时得电动工具有限公司 Cleaning device assembly

Also Published As

Publication number Publication date
GB9018439D0 (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)