EP0551998A1 - Spender für viskose Medien und seine Steuervorrichtung - Google Patents

Spender für viskose Medien und seine Steuervorrichtung Download PDF

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Publication number
EP0551998A1
EP0551998A1 EP93300130A EP93300130A EP0551998A1 EP 0551998 A1 EP0551998 A1 EP 0551998A1 EP 93300130 A EP93300130 A EP 93300130A EP 93300130 A EP93300130 A EP 93300130A EP 0551998 A1 EP0551998 A1 EP 0551998A1
Authority
EP
European Patent Office
Prior art keywords
trigger
controller
pressure
regulator
pressure setting
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Withdrawn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
EP93300130A
Other languages
English (en)
French (fr)
Inventor
Christopher John Eyre
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.)
BBA Group PLC
Original Assignee
BBA Group PLC
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 BBA Group PLC filed Critical BBA Group PLC
Publication of EP0551998A1 publication Critical patent/EP0551998A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/015—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with pneumatically or hydraulically actuated piston or the like

Definitions

  • the present invention relates to pneumatically actuated dispensers for viscous material and to a controller thereforcomprising a body, a trigger, and a pressure regulator having an inlet for supply air and an outlet.
  • a pneumatically actuated dispenser for viscous material comprises an actuating piston and cylinder device, a plunger connected to the piston of the device and a keep for a cartridge containing the material.
  • EP-A-0369568 describes a pneumatically actuated dispenser for viscous material which has a handle mounted trigger for opening and closing a pneumatic flow path from an air supply to a regulator associated with the actuating piston and cylinder device of the dispenser.
  • the regulator includes an adjuster for setting the pressure in the cylinder.
  • the trigger is arranged to admit or prevent the supply air to the cylinder at a pressure set by the regulator.
  • the present invention aims to alleviate these problems.
  • the present invention is characterised by a movable regulated pressure setting member arranged to be responsive to movement of the trigger, to change the regulated pressure at the outlet of the regulator.
  • the body comprises a handle which is formed as a pistol grip, comprising a portion to be held in the palm of the hand of a user, the trigger being engageable by a finger or thumb of the said hand.
  • the trigger may be pivotably connected to the handle or arranged for linear movement to move the pressure setting member of the regulator.
  • the trigger could be in the form of a lever, a linearly slidable member or other means by which force can be applied to regulated pressure setting member, such as a button.
  • the regulator is mounted (or at least partially mounted) within the body of the handle.
  • the connection between the trigger and the pressure setting member may be by means of a mechanical linkage.
  • a pair of linkage arms may be connected, at their respective first ends, to the trigger and a point on the handle, the second ends of the arms are pivotably connected together to rotate relative to one another as the trigger is moved to change the position of their common pivot relative to the handle, the pressure setting member being arranged to engage one of the arms intermediate its ends to move in response to movement of the trigger.
  • the engagement of the pressure setting member by one of the arms is towards the common pivot between the arms.
  • the trigger is biased to a position corresponding to a predetermined regulated pressure setting of the regulator.
  • the bias may act directly upon the trigger and/or be a constituent part of the regulator the latter biassing the trigger through the pressure setting member.
  • the mechanical advantage of the means of application of the force applied to pressure setting member increases with the degree of movement of the trigger.
  • the regulator may be arranged to regulate the outlet pressure to be substantially constant for a given position of the trigger, the outlet pressure being variable in response to movement of the trigger.
  • the pressure setting member is a linearly slidable plunger.
  • the pressure setting member comprises a plunger having a first portion which is coupled, through a resilient intermediate member, to a regulating piston of the regulator.
  • the pressure setting member may have a second portion which extends from a housing of the regulator and is arranged for pressure setting movement in response to movement of the trigger.
  • the pressure setting member may be provided with an abutment, such as a flange, in order to provide a limit to its movement in one direction. The flange may prevent the pressure setting member from detaching from the regulator housing.
  • the outlet pressure may be governed as a function of the position of the pressure setting member such as being linearly dependent upon the position of the pressure setting member.
  • the outlet pressure is related to the degree of depression of the trigger.
  • a controller according to the invention allows variation of the regulated outlet pressure simply by movement of the trigger.
  • the minimum pressure may be determined by the flange on the pressure setting member engaging an abutment on the regulator housing, limiting the extent of its movement in one direction.
  • the minimum pressure could be determined by a flange on the trigger engaging an abutment on the controller body to limit its extent of movement in one direction.
  • the maximum value may be limited by an adjustable stop mounted on the body, to limit the extent of movement of the trigger in the other direction.
  • the stop may be associated with or separate from locking means for locking the trigger in a position intermediate those corresponding to the minimum and maximum regulated outlet pressure settings.
  • control constitutes a stock of a dispensing gun for viscous material, the stock being provided with means for connecting it to the body of the gun.
  • the outlet of the regulator may be connected to the inlet of an actuating piston and cylinder device of a dispenser which is arranged to advance a dispenser plunger to discharge the viscous material from a cartridge.
  • the stock may be formed with a saddle which enables it to be connected to dispensers of various sizes.
  • the saddle may be of flexible material to accommodate dispenser cylinders of various sizes.
  • the stock may include couplings for attaching the controller outlet to the cylinder of the dispenser and the controller inlet to a pneumatic supply line.
  • the controller may include a pneumatic switch for directing air to alternate inlets on either end of side of an actuating piston in an actuating cylinder. In this way, actuation of the switch could select the direction in which the actuating piston is urged.
  • a dispenser for viscous material of the type specified including a controller according to the invention.
  • the dispenser includes a dump valve connected between the controller and the pressure cylinder.
  • the valve is arranged to vent air if pressure on the controller side of the valve drops substantially below that on the cylinder side of the valve.
  • an air pressure regulator 10 has an inlet 12, an outlet 14 and a pressure setting plunger 16.
  • the plunger 16 comprises a flange 18 at one end which is a sliding fit within a bore 20, defined by a body 22 of the regulator 10, and a narrower stem portion 24 which projects out of the bore 20 past a radially inwardly projecting retaining collar 26 in one end of the bore 20.
  • a helical spring 28 biases a piston 30 riding in the bore 20 away from the flange 18.
  • the piston 30 has a peripheral annular recess 32 which holds an O-ring seal 34 which seats against the bore 20.
  • the piston 30 also includes a co-axial vent port 36.
  • the piston 30 is formed into a stem 38 through which the port 36 extends on the side opposite that on which the spring 28 is located.
  • the end of the stem 38 acts as a valve seat 40 which is arranged to engage a regulating seal plate 42 biased towards the stem 38 by a helical spring 44 mounted in the bore 20 adjacent its connection with the inlet 12.
  • the body 22 has a radially inwardly projecting annular 'knife-edge' seat 46 which limits the extent of movement of the regulating seal plate 42. When engaged, the seat 46 and seal plate 42 seal the inlet 12 from the remainder of the bore 20.
  • a passage 48 leads away from the bore 20 to the outlet 14 in the form of a flexible tube.
  • the regulator 10 governs the pressure at the outlet 14 as follows :
  • the spring 28 compresses and exerts an increased force on the piston 30.
  • the valve seat 40 pushes the regulating seal plate 42 away from the seat 46. Air then flows from the supply through the inlet 12 to the outlet 14 and the pressure at the outlet 14 rises.
  • the piston 30 allows the seal plate 42 to return towards the seat 46.
  • the seal plate 42 will reseat, stopping air flowing from the inlet 12. Unless the pressure at the outlet 14 drops or the plunger 16 is moved again, the regulator 10 is in balance.
  • the insert 26 may be removed to permit withdrawal of the plunger 16 and spring 28 and, if desired, the spring 28 may be replaced by another of a different rating for an application requiring a different maximum outlet pressure.
  • the springs 28, 44 need not comprise helical springs and could instead comprise other forms of compressible or resilient means providing similar biassing for the plunger 16 and the piston 30, and the seal plate 42 and seat 46, respectively.
  • Fig.2 shows the regulator 10 installed within a pistol grip type handle 48 of a controller 50.
  • a trigger 52 is pivotably mounted on the handle 48 by a pivot pin 54.
  • a first linkage arm 56 is pivotably connected to the trigger 52 by a pivot pin 58 spaced from the pivot pin 54.
  • the other end of the first linkage arm 56 is pivotably connected to a second linkage arm 60 which is pivotably coupled at its other end to a further pivot pin 62 inside the handle 48.
  • the pair of linkage arms could be replaced by a unitary flexible arm having a region of flexure replacing the pivotable connection between the linkage arms.
  • the linkage arms 56,60 flex relative to one another as the trigger 52 is squeezed or released to cause the pressure setting plunger 16 in the regulator 10 to be depressed or extended.
  • the mechanism formed by the linkage arms 56,60 and the trigger 52 is such that the mechanical advantage of the trigger 52 and the plunger 16 increases as the trigger 52 is depressed.
  • the trigger 52 may therefore be compensated to give a 'constant feel' as it is depressed, i.e. the increasing force of the spring 28 beneath the plunger 16 is countered by the increasing mechanical advantage assisting the force applied to the trigger 52.
  • a strut 64 which has an axial bore 66, containing a spring 68 and a spigot 70 which extends into a recess 72 in a movement limit stop 74.
  • Both of the strut 64 and the limit stop 74 have helical engagement surfaces 76 as shown in Fig.3.
  • the limit stop 74 may be rotated by a knob 77 on the exterior of the handle 48 for varying the maximum amount by which the trigger 52 may be depressed.
  • the sprung spigot 70 biasses the trigger 52 outwards towards the minimum regulated outlet pressure setting so that, when the trigger 52 is released, the minimum outlet pressure setting is selected.
  • the variable stop 74 By adjusting the variable stop 74, the trigger movement can be adjusted for the maximum required pressure or material flow rate.
  • the knob could be mounted in the trigger with the limit stop so that it cooperates with the strut mounted on the handle.
  • Figure 4 shows a modified controller 50 which includes a selector switch 78.
  • the switch 78 selects between different outlets (not shown) leading to opposite sides of a piston 104 in a dispenser actuating cylinder 90 so that the piston may drive a dispensing plunger 105 either way as required.
  • Figure 5 shows an embodiment in which the pistol grip handle 48 includes a saddle 80 which is of flexible material for attaching the handle to pressure cylinders 82,84,86 of dispensing guns with differently sized actuating cylinders.
  • a fastening belt or collar 88 of sprung steel or a suitable plastics material is employed for attaching a selected dispenser actuating cylinder 82,84,86 to the handle 48.
  • Figure 6 shows a partial view of the rear of the actuating cylinder 90 of the embodiment of Figure 4 in which a flexible pipe 92 leads from the regulator 10 to a pressure vent 94.
  • the vent includes a dump valve 96 containing a flexible disc 98.
  • the trigger 52 is squeezed to force compressed air up the pipe 92, the disc 98 moves to the left as seen in Figure 6.
  • the compressed air can travel around the edges of the disc through notches 100 in the vent body 102 so that pressure is applied to the piston 104 of the cylinder 90.
  • the regulator 10 vents air to atmosphere and the pressure in the pipe 92 may drop below that in the cylinder 90.
  • the disc 98 may therefore move to the right as seen in Figure 6, opening large outlet ports (not shown) in an end wall 106 which allows rapid exhaust to atmosphere.
  • a replacable material cartridge 108 is attached to the cylinder 90 at a coupling keep 110.
  • the cartridge has an aperture 112 at one end for dispensing material as the trigger 52 is squeezed.
  • a dispenser incorporating a controller according to the invention allows a variable material discharge rate simply by the amount the trigger 52 is depressed. The operator is able to start application slowly and to build up speed as necessary and to release the trigger 52 to slow the flow rate. The discharge of viscous material can be brought to a controlled stop with little or no seepage when the trigger 52 is fully released.

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  • Coating Apparatus (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
EP93300130A 1992-01-14 1993-01-08 Spender für viskose Medien und seine Steuervorrichtung Withdrawn EP0551998A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB929200663A GB9200663D0 (en) 1992-01-14 1992-01-14 Dispenser for viscous material and controller therefor
GB9200663 1992-04-13

Publications (1)

Publication Number Publication Date
EP0551998A1 true EP0551998A1 (de) 1993-07-21

Family

ID=10708525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93300130A Withdrawn EP0551998A1 (de) 1992-01-14 1993-01-08 Spender für viskose Medien und seine Steuervorrichtung

Country Status (2)

Country Link
EP (1) EP0551998A1 (de)
GB (1) GB9200663D0 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468418A1 (de) 2010-12-23 2012-06-27 P C Cox Limited Ventil und Ausgabe mit dem Ventil
EP2468419A1 (de) 2010-12-23 2012-06-27 P C Cox Limited Bidirektionaler pneumatischen Spender
US8499977B2 (en) 2009-10-22 2013-08-06 P. C. Cox Limited Plunger
US8528793B2 (en) 2010-12-23 2013-09-10 P. C. Cox Limited Actuator
US8870093B2 (en) 2010-12-23 2014-10-28 P.C. Cox Limited Dispenser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3042268A (en) * 1959-04-10 1962-07-03 Pyles Ind Inc Sealant gun
EP0054702A1 (de) * 1980-12-22 1982-06-30 HILTI Aktiengesellschaft Gerät zum dosierten Abgeben von Massen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3042268A (en) * 1959-04-10 1962-07-03 Pyles Ind Inc Sealant gun
EP0054702A1 (de) * 1980-12-22 1982-06-30 HILTI Aktiengesellschaft Gerät zum dosierten Abgeben von Massen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8499977B2 (en) 2009-10-22 2013-08-06 P. C. Cox Limited Plunger
EP2468418A1 (de) 2010-12-23 2012-06-27 P C Cox Limited Ventil und Ausgabe mit dem Ventil
EP2468419A1 (de) 2010-12-23 2012-06-27 P C Cox Limited Bidirektionaler pneumatischen Spender
US8528793B2 (en) 2010-12-23 2013-09-10 P. C. Cox Limited Actuator
US8607824B2 (en) 2010-12-23 2013-12-17 P.C. Cox Limited Valve and dispenser using the valve
US8616415B2 (en) 2010-12-23 2013-12-31 P.C. Cox Limited Dispenser
US8870093B2 (en) 2010-12-23 2014-10-28 P.C. Cox Limited Dispenser

Also Published As

Publication number Publication date
GB9200663D0 (en) 1992-03-11

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