EP0174401A1 - Improvements in hand-operated sprayers - Google Patents

Improvements in hand-operated sprayers Download PDF

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Publication number
EP0174401A1
EP0174401A1 EP84306168A EP84306168A EP0174401A1 EP 0174401 A1 EP0174401 A1 EP 0174401A1 EP 84306168 A EP84306168 A EP 84306168A EP 84306168 A EP84306168 A EP 84306168A EP 0174401 A1 EP0174401 A1 EP 0174401A1
Authority
EP
European Patent Office
Prior art keywords
spool
hand
bore
head
nozzle
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.)
Granted
Application number
EP84306168A
Other languages
German (de)
French (fr)
Other versions
EP0174401B1 (en
Inventor
William Joseph Reed
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.)
Associated Sprayers Ltd
Original Assignee
Associated Sprayers Ltd
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
Priority claimed from GB838316027A external-priority patent/GB8316027D0/en
Priority to GB08414805A priority Critical patent/GB2141488B/en
Application filed by Associated Sprayers Ltd filed Critical Associated Sprayers Ltd
Priority to DE8484306168T priority patent/DE3477886D1/en
Priority to AT84306168T priority patent/ATE42479T1/en
Priority to EP19840306168 priority patent/EP0174401B1/en
Publication of EP0174401A1 publication Critical patent/EP0174401A1/en
Application granted granted Critical
Publication of EP0174401B1 publication Critical patent/EP0174401B1/en
Expired 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
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve

Definitions

  • This invention relates to hand-operated sprayers of the kind comprising a spray head for attachment to a container for liquid, in which the spray head incorporates a manually-operable valve for controlling the discharge of liquid from an inlet in the head to a discharge nozzle.
  • valve In known sprayers of the kind set forth the valve usually comprises a valve member with which a spring co-operates to urge it into a closed position in engagement with a seating surrounding the inlet, and a manually-operable trigger mounted on the head is movable to urge the valve member away from the seating to open the valve against the loading in the spring.
  • the spring is adapted to hold the valve in the closed position with the valve member in engagement with the seating.
  • the spring has to be relatively strong to resist an opening force comprising the pressure acting over the area of the valve member.
  • the valve comprises a spool guided for longitudinal movement in a bore in the head, the spool having a longitudinally extending passage adapted to provide communication between the inlet and the discharge nozzle, and a head defined by the end of the spool remote from the nozzle for engagement with a seating in the head to isolate the inlet from the passage in the spool, the sprayer also including a spring for urging the valve into a closed position in which the head is in engagement with the seating, an annular seal of elastomeric material disposed in the bore and surrounding the spool, the annular seal providing a seal between the bore and the spool and being adapted to prevent external leakage of liquid from the bore, and a manually-operable member for moving the valve into an open position against the force in the spring.
  • the annular seal is thus in frictional engagement with the spool, and this increases the resistance to movement of the spool with respect to the bore in both directions between the open and closed positions.
  • This enables us to choose a spring, the strength of which can comfortably be overcome by a manual force applied to the manually-operable member, thereby facilitating operation, but the spring must be sufficiently strong to overcome any pressure of liquid acting on the head at least during movement of the head towards the seating.
  • the inlet comprises a radial port leading to the bore, the port being located in an axial position between the seal and the seating.
  • the seal therefore prevents external leakage of liquid from the inlet when the valve is in its closed position. Since the annular seal is subjected at all times to any pressure in the container the sealing effect, and in consequence the frictional engagement of the seal with the spool, is enhanced by the pressure acting on it.
  • the annular seal is housed in a radial retaining groove in the wall of the bore and the spool is guided to slide through the seal.
  • This has the advantage that any tolerance variations between the spool and the bore are accommodated by the annular seal, and it is not necessary to provide a high surface finish on the complementary surfaces of the bore and the spool since they do not engage directly.
  • the head may comprise a plain face at the end of the spool, and the seating may comprise a resilient member supported by a wall at a closed inner end of the bore.
  • the head may be of relatively small diameter. This reduces to a minimum the force, comprising the pressure acting over the area of the spool, which urges the spool away from the seating, thereby enabling us to provide a relatively lighter spring.
  • the nozzle may comprise a separate member screwed onto the outer end portion of the spool.
  • a second annular seal of elastomeric material may be disposed between the nozzle and the spool to prevent the external escape of liquid except through the nozzle.
  • the longitudinal passage in the spool may be closed at its outer end and may communicate with the nozzle through one or more radial ports in the spool.
  • the spool may be constructed from two separate parts with a first part being guided to slide in the longitudinal bore, and the second part carrying the second annular seal and receiving the nozzle in a screw-threaded engagement.
  • the portion of the sprayer illustrated in the drawings is adapted for mounting on a container for liquid.
  • the portion comprises a spray head 1 including a longitudinally extending bore 2 which is closed at its inner end by a wall 3, and a manually-operable valve including a two-part spool assembly 4, for controlling discharge of liquid from an inlet 21 to a discharge nozzle 14.
  • the spool assembly 4 comprises a spool 5 which works in the bore 2 and has a longitudinally extending passage 6, and a hollow forward extension 7 which is closed at its forward end but which is provided adjacent to that end with a pair of diametrically arranged ports 8.
  • a first sealing 'O' ring 9 of elastomeric material is received in a radial groove 10 defined between the open outer end of the bore 2 and a retainer 11, so that it surrounds the spool 5 and is in frictional engagement with it.
  • a second sealing 'O' ring 12 of elastomeric material is received in a radial groove 13 provided in the extension 7 in a position inwardly of the ports 8 to seal against the wall of the nozzle 14, which is screwed onto the outer end of the extension 7.
  • the nozzle 14 has a central discharge opening 15 with which the ports 8 communicate through a clearance 16 between the extension 7 and nozzle and a swirl slot in the adjacent closed end of the extension 7.
  • a manually-operable member in the form of a trigger 17 fits over the spray head 1, and is coupled to the nozzle 14 by means of a fork 18 which is received in annular recess 18a in the nozzle 14.
  • a spring acts between the head 1 and the trigger 17 normally to hold the valve in a closed position as shown in Figure 1 with a head 19 comprising the plain inner end of the spool 5 in engagement with a seating comprising an '0' ring seal 20 of elastomeric material supported by the wall 3 at the closed inner end of the bore 2.
  • the radial inlet 21 in the wall of the head 1 is isolated from the passage 6, and external leakage of liquid from the space between the spool 5 and the bore 2 is prevented by the seal 9.
  • the spray head described above can be incorporated in a hand-operated sprayer of the pressurised liquid type forming the subject of our pending Patent Applications GB-A-2084258 and 8313900.

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Abstract

A hand-operated sprayer has a spray head (1) for attachment to a container for liquid. The spray head (1) includes a manually-operable valve for controlling the discharge of liquid from an inlet (21) in the head to a discharge nozzle (14) The sprayer includes a spring urging the valve into a closed position and a manually-operable member (17) mounted on the head, which can be moved against the spring-loading to urge the valve into an open position. The valve comprises a spool (5) having a passage (6) providing communication between the inlet (21) and the discharge nozzle (14), and a head (19) for engagement with a seating (20) to isolate the inlet (21) from the passage (6). An annular seal (9) of elastomeric material is also disposed in the bore (2) surrounding the spool (5), and in frictional engagement with it.

Description

  • This invention relates to hand-operated sprayers of the kind comprising a spray head for attachment to a container for liquid, in which the spray head incorporates a manually-operable valve for controlling the discharge of liquid from an inlet in the head to a discharge nozzle.
  • In known sprayers of the kind set forth the valve usually comprises a valve member with which a spring co-operates to urge it into a closed position in engagement with a seating surrounding the inlet, and a manually-operable trigger mounted on the head is movable to urge the valve member away from the seating to open the valve against the loading in the spring.
  • In such known constructions the spring is adapted to hold the valve in the closed position with the valve member in engagement with the seating. In consequence in those constructions in which the pressure of fluid in the container acts on the valve member in a direction tending to urge it away from the seating, the spring has to be relatively strong to resist an opening force comprising the pressure acting over the area of the valve member.
  • According to our invention in a hand-operated sprayer of the kind set forth the valve comprises a spool guided for longitudinal movement in a bore in the head, the spool having a longitudinally extending passage adapted to provide communication between the inlet and the discharge nozzle, and a head defined by the end of the spool remote from the nozzle for engagement with a seating in the head to isolate the inlet from the passage in the spool, the sprayer also including a spring for urging the valve into a closed position in which the head is in engagement with the seating, an annular seal of elastomeric material disposed in the bore and surrounding the spool, the annular seal providing a seal between the bore and the spool and being adapted to prevent external leakage of liquid from the bore, and a manually-operable member for moving the valve into an open position against the force in the spring.
  • The annular seal is thus in frictional engagement with the spool, and this increases the resistance to movement of the spool with respect to the bore in both directions between the open and closed positions. This enables us to choose a spring, the strength of which can comfortably be overcome by a manual force applied to the manually-operable member, thereby facilitating operation, but the spring must be sufficiently strong to overcome any pressure of liquid acting on the head at least during movement of the head towards the seating.
  • Preferably the inlet comprises a radial port leading to the bore, the port being located in an axial position between the seal and the seating. The seal therefore prevents external leakage of liquid from the inlet when the valve is in its closed position. Since the annular seal is subjected at all times to any pressure in the container the sealing effect, and in consequence the frictional engagement of the seal with the spool, is enhanced by the pressure acting on it.
  • Preferably the annular seal is housed in a radial retaining groove in the wall of the bore and the spool is guided to slide through the seal. This has the advantage that any tolerance variations between the spool and the bore are accommodated by the annular seal, and it is not necessary to provide a high surface finish on the complementary surfaces of the bore and the spool since they do not engage directly.
  • The head may comprise a plain face at the end of the spool, and the seating may comprise a resilient member supported by a wall at a closed inner end of the bore. In such a construction the head may be of relatively small diameter. This reduces to a minimum the force, comprising the pressure acting over the area of the spool, which urges the spool away from the seating, thereby enabling us to provide a relatively lighter spring.
  • The nozzle may comprise a separate member screwed onto the outer end portion of the spool. A second annular seal of elastomeric material may be disposed between the nozzle and the spool to prevent the external escape of liquid except through the nozzle.
  • The longitudinal passage in the spool may be closed at its outer end and may communicate with the nozzle through one or more radial ports in the spool.
  • The spool may be constructed from two separate parts with a first part being guided to slide in the longitudinal bore, and the second part carrying the second annular seal and receiving the nozzle in a screw-threaded engagement.
  • One embodiment of our invention is illustrated in the accompanying drawings in which:-
    • Figure 1 is a longitudinal section through a portion of a hand-operated sprayer with a manually-operable valve in a closed position; and
    • Figure 2 is similar to Figure 1 but showing the valve in an open position.
  • The portion of the sprayer illustrated in the drawings is adapted for mounting on a container for liquid. The portion comprises a spray head 1 including a longitudinally extending bore 2 which is closed at its inner end by a wall 3, and a manually-operable valve including a two-part spool assembly 4, for controlling discharge of liquid from an inlet 21 to a discharge nozzle 14.
  • The spool assembly 4 comprises a spool 5 which works in the bore 2 and has a longitudinally extending passage 6, and a hollow forward extension 7 which is closed at its forward end but which is provided adjacent to that end with a pair of diametrically arranged ports 8. A first sealing 'O' ring 9 of elastomeric material is received in a radial groove 10 defined between the open outer end of the bore 2 and a retainer 11, so that it surrounds the spool 5 and is in frictional engagement with it. A second sealing 'O' ring 12 of elastomeric material is received in a radial groove 13 provided in the extension 7 in a position inwardly of the ports 8 to seal against the wall of the nozzle 14, which is screwed onto the outer end of the extension 7. The nozzle 14 has a central discharge opening 15 with which the ports 8 communicate through a clearance 16 between the extension 7 and nozzle and a swirl slot in the adjacent closed end of the extension 7.
  • A manually-operable member in the form of a trigger 17 fits over the spray head 1, and is coupled to the nozzle 14 by means of a fork 18 which is received in annular recess 18a in the nozzle 14. A spring (not shown) acts between the head 1 and the trigger 17 normally to hold the valve in a closed position as shown in Figure 1 with a head 19 comprising the plain inner end of the spool 5 in engagement with a seating comprising an '0' ring seal 20 of elastomeric material supported by the wall 3 at the closed inner end of the bore 2. In this position the radial inlet 21 in the wall of the head 1 is isolated from the passage 6, and external leakage of liquid from the space between the spool 5 and the bore 2 is prevented by the seal 9.
  • When the trigger 17 is operated manually against the force in the spring, the force holding the head 19 against the seating 20 is relieved but the valve will not normally open until the trigger 17 physically applies a force to the spool 5 via the nozzle 14 in that direction, in order to overcome the frictional engagement of the seal 9 with the spool 5. As the head 19 moves away from the seating 20 into the position shown in Figure 2, pressurised fluid in the container acts over the area of the head 19, which comprises a relatively small annular area surrounding the bore 6, to augment the opening force and such liquid also passes from the nozzle through the bore 6 and the radial ports 8, to be discharged through the opening 15 in the nozzle. External leakage of liquid from the space between the nozzle 14 and the extension 7 is prevented by the provision of the sealing ring 12.
  • The spray head described above can be incorporated in a hand-operated sprayer of the pressurised liquid type forming the subject of our pending Patent Applications GB-A-2084258 and 8313900.

Claims (10)

1. A hand-operated sprayer of the kind set forth, in which the valve comprises a spool guided for longitudinal movement in a bore in the head, the spool having a longitudinally extending passage adapted to provide communication between the inlet and the discharge nozzle, and a head defined by the end of the spool remote from the nozzle for engagement with a seating in the head to isolate the inlet from the passage in the spool, the sprayer also including a spring for urging the valve into a closed position in which the head is in engagement with the seating, an annular seal of elastomeric material disposed in the bore and surrounding the spool, the annular seal providing a seal between the bore and the spool and being adapted to prevent external leakage of liquid from the bore, and a manually-operable member for moving the valve into an open position against the force in the spring.
2. A hand-operated sprayer as claimed in claim 1, in which the inlet comprises a radial port leading to the bore, the port being located in an axial position between the seal and the seating.
3. A hand-operated sprayer as claimed in claim 1 or claim 2, in which the annular seal is housed in a radial retaining groove in the wall of the bore and the spool is guided to slide through the seal.
4. A hand-operated sprayer as claimed in any preceding claim, in which the head comprises a plain face at the end of the spool, and the seating comprises a resilient member supported by a wall at a closed inner end of the bore.
5. A hand-operated sprayer as claimed in claim 4, in which the head is of relatively small diameter.
6. A hand-operated sprayer as claimed in any preceding claim, in which the nozzle comprises a separate member screwed onto the outer end portion of the spool.
7. A hand-operated sprayer as claimed in claim 6, in which a second annular seal of elastomeric material is disposed between the nozzle and the spool.
8. A hand-operated sprayer as claimed in any preceding claim, in which the longitudinal passage in the spool is closed at its outer end, and communicates with the nozzle through one or more radial ports in the spool.
9. A hand-operated sprayer as claimed in any preceding claim, in which the spool is constructed from two separate parts, with a first part guided to slide in the longitudinal bore, and a second part receiving the nozzle in screw-threaded engagement.
10. A hand-operated sprayer as claimed in claim 7 and claim 9, in which the second part of the spool carries the second annular seal.
EP19840306168 1983-06-11 1984-09-10 Improvements in hand-operated sprayers Expired EP0174401B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB08414805A GB2141488B (en) 1983-06-11 1984-06-11 Improvements in hand-operated sprayers
DE8484306168T DE3477886D1 (en) 1984-09-10 1984-09-10 Improvements in hand-operated sprayers
AT84306168T ATE42479T1 (en) 1984-09-10 1984-09-10 HAND OPERATED ATOMIZERS.
EP19840306168 EP0174401B1 (en) 1983-06-11 1984-09-10 Improvements in hand-operated sprayers

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB838316027A GB8316027D0 (en) 1983-06-11 1983-06-11 Hand-operated sprayers
GB08414805A GB2141488B (en) 1983-06-11 1984-06-11 Improvements in hand-operated sprayers
EP19840306168 EP0174401B1 (en) 1983-06-11 1984-09-10 Improvements in hand-operated sprayers

Publications (2)

Publication Number Publication Date
EP0174401A1 true EP0174401A1 (en) 1986-03-19
EP0174401B1 EP0174401B1 (en) 1989-04-26

Family

ID=27227247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840306168 Expired EP0174401B1 (en) 1983-06-11 1984-09-10 Improvements in hand-operated sprayers

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EP (1) EP0174401B1 (en)
GB (1) GB2141488B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR669927A (en) * 1929-07-27 1929-11-22 Tubular distributor shutter with rectilinear movement for fluids, in all applications and in particular automotive and aviation with manual or remote control, reserve, filter and switch with electric ignition
FR2104146A5 (en) * 1970-08-10 1972-04-14 British Oxygen Co Ltd
FR2270497A1 (en) * 1974-05-10 1975-12-05 Pont A Mousson Tap with sliding plug - has screw and nut mechanism moving plug in axial bore in body
GB2084258A (en) * 1980-09-23 1982-04-07 Ass Sprayers Ltd Improvements in hand operated sprayers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB295158A (en) * 1927-11-18 1928-08-09 Matti Vilho Lappalainen An appliance for cleaning the teeth
US2546808A (en) * 1947-03-22 1951-03-27 Prel Inc Pressure dispensing device
GB673708A (en) * 1949-11-01 1952-06-11 Nu Swift Ltd An improved nozzle for controlling the discharge of liquids
DE1782388B2 (en) * 1968-08-24 1973-03-15 Credo-Stahlwarenfabrik Gustav Kracht, 5650 Solingen APPLIANCE FOR POWING ESPECIALLY BEER IN CANS
IT1076650B (en) * 1977-03-31 1985-04-27 Massarani Giuliano DISPENSING VALVE FOR WHIPPED CREAM

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR669927A (en) * 1929-07-27 1929-11-22 Tubular distributor shutter with rectilinear movement for fluids, in all applications and in particular automotive and aviation with manual or remote control, reserve, filter and switch with electric ignition
FR2104146A5 (en) * 1970-08-10 1972-04-14 British Oxygen Co Ltd
FR2270497A1 (en) * 1974-05-10 1975-12-05 Pont A Mousson Tap with sliding plug - has screw and nut mechanism moving plug in axial bore in body
GB2084258A (en) * 1980-09-23 1982-04-07 Ass Sprayers Ltd Improvements in hand operated sprayers

Also Published As

Publication number Publication date
GB8414805D0 (en) 1984-07-18
EP0174401B1 (en) 1989-04-26
GB2141488A (en) 1984-12-19
GB2141488B (en) 1986-09-17

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