EP0487800A1 - Verriegelungsvorrichtung - Google Patents

Verriegelungsvorrichtung Download PDF

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Publication number
EP0487800A1
EP0487800A1 EP90313009A EP90313009A EP0487800A1 EP 0487800 A1 EP0487800 A1 EP 0487800A1 EP 90313009 A EP90313009 A EP 90313009A EP 90313009 A EP90313009 A EP 90313009A EP 0487800 A1 EP0487800 A1 EP 0487800A1
Authority
EP
European Patent Office
Prior art keywords
latching
container
operating element
latching element
handset
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
EP90313009A
Other languages
English (en)
French (fr)
Other versions
EP0487800B1 (de
Inventor
David Raffo
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.)
Nomix Chipman Ltd
Original Assignee
Nomix Chipman 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
Application filed by Nomix Chipman Ltd filed Critical Nomix Chipman Ltd
Priority to AT90313009T priority Critical patent/ATE119617T1/de
Priority to ES90313009T priority patent/ES2069028T3/es
Priority to EP90313009A priority patent/EP0487800B1/de
Priority to DE69017692T priority patent/DE69017692D1/de
Publication of EP0487800A1 publication Critical patent/EP0487800A1/de
Application granted granted Critical
Publication of EP0487800B1 publication Critical patent/EP0487800B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12—Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/16—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch
    • E05C3/22—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the bolt being spring controlled
    • E05C3/30—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member moving otherwise than rigidly with the latch the bolt being spring controlled in the form of a hook

Definitions

  • This invention relates to a latching mechanism, and is particularly, although not exclusively, concerned with a latching mechanism suitable for retaining a container of liquid on equipment for distributing the liquid.
  • GB-A-2207032 discloses hand-held equipment for distributing herbicides.
  • the equipment comprises a handset having a recess for receiving a container of the herbicide.
  • the handset is provided with a latching mechanism for retaining the container in the recess.
  • the latching mechanism comprises a pivotable lever which is movable into and out of a latching recess formed in the container.
  • a latching mechanism comprising an operating element and a latching element which is resiliently displaceable, upon operation of the operating element, from a latching position to a release position, characterised in that the operating element is displaceable along a guide surface in a direction transverse to the direction of displacement of the latching element between the latching position and the release position, and having a cam surface which cooperates with the latching element to displace the latching element against the resilient bias.
  • the operating element is itself resiliently biassed in the direction such that it allows the latching element to be displaced under its resilient bias in the latching position.
  • the latching element is connected by a flexible limb to a support member.
  • the support member, the latching element and the flexible limb may be formed in one piece, preferably as a plastic moulding.
  • the guide surface may be provided on the support member.
  • the cam surface may be provided on a projecting nose of the operating element, which nose is displaceable within a slot formed in the latching element. The cam surface then cooperates with one end of the slot in order to displace the latching element.
  • the latching mechanism comprises part of the handset of equipment for delivering a liquid such as a herbicide from the container releasably retained in a recess in the handset by the latching mechanism.
  • the applicator shown in Figure 1 comprises a handset 2 which carries a delivery head 4 on a support tube 6.
  • the delivery head 4 accommodates an electric motor (not shown) for driving a distribution disc (also not shown) in order to distribute herbicide over the ground under centrifugal force.
  • the liquid to be distributed, and power for the electric motor, are supplied to the delivery head 4 from the handset 2 through the support tube 6.
  • a valve controlling the flow of liquid and a switch controlling the supply of power are operated by a trigger 8 provided in the handset.
  • the handset 2 has a recess 10 for receiving a container 12 (see Figures 4 and 5) containing the liquid to be delivered.
  • the recess 10 accommodates a connection fitting 14 for engagement with an outlet fitting 16 on the container, and a latching mechanism 18 for engagement with a notch 20 formed in the wall of the container 12.
  • the handset 2 has a guide 22 extending in the direction of movement of the container 12 into and out of the recess 10. As shown in Figures 2 and 3, this guide comprises a track 24 having retaining flanges 26.
  • the handset 2 has a curved handle member 28 in which the trigger 8 is mounted.
  • the handle 28 also accommodates one or more batteries 30 for providing the electrical power for the equipment, and a potentiometer 32, controlled by a control knob 34, for regulating the power supply to the spinning disc in the delivery head 4, so as to control the rotational speed of the disc.
  • the trigger 8 is connected by a link to a shut-off valve 38 for controlling the flow of herbicide from the container 12 to the delivery head 4, through a flexible tube 40 provided in the support tube 6 (see Figure 5).
  • connection fitting 14 communicates with the inlet of the valve 38 through a duct 42.
  • the outlet fitting 16 of the container 12 is provided with a self-closing valve of the type disclosed in European Patent Application No. 90303900.6. This valve applies a resilient force on the connection fitting 14 tending to bias the container 12 away from the connection fitting 14.
  • the latching mechanism 18, shown in fragmentary view in Figure 6, comprises a latching element 44 which is connected by a flexible limb 46 to a support member 48 which is part of a partition 50 mounted within the handset 2 and carrying the valve 38.
  • the partition 50, including the flexible limb 46 and the latching element 44 are formed integrally with each other, and comprise a plastic moulding.
  • the latching mechanism 18 also comprises an operating element 52, which comprises a push button 54 and a projecting nose 56.
  • the push button 54 is situated on the outside of the handset 2, for manual operation by a user of the applicator.
  • the nose 56 extends into a slot 58 formed in the flexible limb 46 of the latching element 44.
  • the nose 56 has an oblique cam surface 60 which cooperates with the end wall 62 of the slot 58.
  • a leaf spring 64 ( Figure 6) acts between the support member 48 and the push button 54 in order to bias the operating element 52 in the direction away from the latching element 44.
  • the container 12 is shown in greater detail in Figures 7 to 9. It comprises a moulded body of plastics material, and has two side walls 64, a base 66, a front wall 68, a lower wall 70 and an upper wall 72.
  • the front wall 68 is provided with the outlet fitting 16, which has a removable cap 74.
  • the cap 74 is connected to the outlet fitting 16 by a flexible strap 76 and, when removed from the outlet fitting 16, the cap 74 can be accommodated in a recess 78 provided in the front wall 68.
  • the notch 20 is provided in the side wall 64 on the side opposite the recess 78, adjacent the front wall 68. It is separated from the front wall 68 by a ridge 80.
  • the side walls 64 are provided with shallow depressions 82, to assist in grasping the
  • the upper wall 72 is provided with a projecting rib 84 which has a shape generally complementary to that of the slot 24. However, the rib 84 tapers slightly in the direction from the base 66 to the front wall 68. Between the rib 84 and the main body of the container 12, there are oppositely disposed grooves 86, for receiving the flanges 26. The ribs 86 terminate some distance from the base 66.
  • the container In order to fit the container 12 to the handset 2, the container is presented from the rear of the handset 2 with the outlet fitting 16 directed towards the recess 10. The leading end of the rib 84 is engaged with the rear end of the slot 24. This requires no great accuracy, as a result of the narrower cross-section of rib 84 at its leading end. The container is then slid forwards, guided by the cooperation between the rib 84 and the slot 24.
  • the tapering shape of the rib 84 means that the fit between the rib 84 and the slot 24 becomes progressively tighter as the container 12 is advanced, so that the outlet fitting 16 is accurately directed at the connection fitting 14 within the recess 10. The two fittings 16 and 14 thus make proper engagement with each other as the container 12 is pushed home.
  • the latching element 44 rides over the rib 80, as a result of the tapering end face of the latching element 44 cooperating with the curved profile at the transition between the rib 80 and the front wall 68 of the container 12.
  • the latching element 44 then snaps under the resilience of the limb 46 into the notch 20, so retaining the container 12 in the recess 10, despite the resilient action exerted between the connection fitting 14 and the outlet fitting 16, tending to push the container 12 out of the recess 10.
  • the act of engaging the container 12 with the handset 2 causes the self-closing valve in the outlet fitting 16 to open, allowing liquid to flow to the valve 38. Operation of the trigger 8, allows the liquid to flow to the delivery head 4, to be discharged from the spinning disc provided in the delivery head 4.
  • the container 12 is released from the handset 2 by displacing the push button 54 rearwardly. This moves the projecting nose 56 along the guide surface 57, pressing the cam surface 60 against the end 62 of the slot 58.
  • the wedging action thus applied by the projecting nose 56 on the latching element 44 causes the latching element 44 to be displaced against the resilient action of the flexible limb 46, so withdrawing the latching element 44 from the notch 20.
  • the container 12 can be then be gripped by means of the depressions 82, and withdrawn from the handset 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Catching Or Destruction (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Closures For Containers (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Centrifugal Separators (AREA)
EP90313009A 1990-11-29 1990-11-29 Verriegelungsvorrichtung Expired - Lifetime EP0487800B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT90313009T ATE119617T1 (de) 1990-11-29 1990-11-29 Verriegelungsvorrichtung.
ES90313009T ES2069028T3 (es) 1990-11-29 1990-11-29 Mecanismo de retencion.
EP90313009A EP0487800B1 (de) 1990-11-29 1990-11-29 Verriegelungsvorrichtung
DE69017692T DE69017692D1 (de) 1990-11-29 1990-11-29 Verriegelungsvorrichtung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90313009A EP0487800B1 (de) 1990-11-29 1990-11-29 Verriegelungsvorrichtung

Publications (2)

Publication Number Publication Date
EP0487800A1 true EP0487800A1 (de) 1992-06-03
EP0487800B1 EP0487800B1 (de) 1995-03-08

Family

ID=8205628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90313009A Expired - Lifetime EP0487800B1 (de) 1990-11-29 1990-11-29 Verriegelungsvorrichtung

Country Status (4)

Country Link
EP (1) EP0487800B1 (de)
AT (1) ATE119617T1 (de)
DE (1) DE69017692D1 (de)
ES (1) ES2069028T3 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363336A1 (de) * 1988-09-08 1990-04-11 Aktiebolaget Electrolux Befestigungseinrichtung für einen Staubsaugerdeckel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363336A1 (de) * 1988-09-08 1990-04-11 Aktiebolaget Electrolux Befestigungseinrichtung für einen Staubsaugerdeckel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 31, no. 11, April 1989, pages 47-48, Armonk, New York, US; "Latch mechanism" *

Also Published As

Publication number Publication date
DE69017692D1 (de) 1995-04-13
ES2069028T3 (es) 1995-05-01
ATE119617T1 (de) 1995-03-15
EP0487800B1 (de) 1995-03-08

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