GB2093164A - Fluid flow control valve - Google Patents

Fluid flow control valve Download PDF

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Publication number
GB2093164A
GB2093164A GB8204396A GB8204396A GB2093164A GB 2093164 A GB2093164 A GB 2093164A GB 8204396 A GB8204396 A GB 8204396A GB 8204396 A GB8204396 A GB 8204396A GB 2093164 A GB2093164 A GB 2093164A
Authority
GB
United Kingdom
Prior art keywords
circlip
wheel
hand
body portion
groove
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
GB8204396A
Other versions
GB2093164B (en
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.)
IMI OPELLA Ltd
Original Assignee
IMI OPELLA 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 IMI OPELLA Ltd filed Critical IMI OPELLA Ltd
Priority to GB8204396A priority Critical patent/GB2093164B/en
Publication of GB2093164A publication Critical patent/GB2093164A/en
Application granted granted Critical
Publication of GB2093164B publication Critical patent/GB2093164B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
    • F16K5/0442—Spindles and actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles

Abstract

A hand-wheel 3 is releasably secured to a body portion 5 of a fluid flow control valve, by means which comprises locating a circlip 6 about the body portion 5 and preventing substantial movement of the circlip relative to the body portion other than compression of the circlip to reduce its diameter about the body, providing either the circlip 6 or the hand-wheel 3 with a flange and the other of these two components with a groove so that the flange and groove can be snap- fitted into locking engagement, and provide means for releasing the locking engagement whilst the hand- wheel is secured to the body portion. <IMAGE>

Description

SPECIFICATION Fluid flow control valve This invention relates to fluid flow control valves, and, more particularly, to the method by which a hand-wheel can be attached to a valve body portion.
In many valves, especially those for use in supply of household water, there is a need for a valve whose hand-wheel can be readily secured to the valve body but can also be readily removed for ease of service of the valve.
The present invention provides means for fixing the hand-wheel to the valve body which satisfies this need and which is especially applicable to valves manufactured from plastics material.
In accordance with the invention, means are provided for releasably securing a hand wheel to a body portion of a fluid flow control valve, which comprises locating a circlip about the body portion and preventing substantial movement of the circlip relative to the body portion other than compression of the circlip to reduce its diameter about the body, providing either the c,rclip or the handwheel with a flange and the other of these two components with a groove so that the flange and groove can be snap-fitted into locking engagement, and providing means for releasing the locking engagement whilst the hand-wheel is secured to the body portion.
All the component parts of the valve including the circlip are preferably made from a suitable plastics material. Clearly it is essential for the circlip to possess a degree of resilience to enable it to be snap-fitted into locking engagement with the hand-wheel.
The body portion to which the hand-wheel is to be attached is conveniently provided with protrusions or lugs to guide and hold the circlip into the correct position about the body portion so that it can receive the hand-wheel. Although, for use, the hand-wheel will tend to cover the circlip, arms are preferably provided at each end of the circlip which protrude outside the hand-wheel and which can be urged together to reduce the radius of the circlip and thereby to release the handwheel from its locking engagement with the circlip.
Guides are preferably provided on either the body portion or the circlip to ensure that the arms for releasing the hand-wheel are always positioned at the same place relative to the body.
Preferably the hand-wheel possesses the groove and the circlip possesses the flange.
The hand-wheel will commonly be circular and "cup" shaped, and the groove is usually positioned on the interior of the cup at a distance from the lip of the cup to cause a secure fit of the hand-wheel through interengagement between its groove and the corresponding flange on the circlip.
To allow the hand-wheel and the body portion to be snap-fitted into locking engagement, it is generally necessary to provide a cam surface on the flange to cause the necessary compression of the circlip and thereby reduce its diameter immediately prior to the snap-fitted engagement taking place. Preferably there will also be a cam surface adjacent the groove so that both cam surfaces engage with each other prior to the snap fitting between the circlip and the hand-wheel to facilitate mating between the flange and groove.
Reference will now be made by way of example, to the accompanying drawings in which: Figure 1 shows a valve with a hand-wheel attached to the body by means of the invention, Figure 2 shows, schematically, the circlip shown in Figure 1 from one side.
Figure 3 shows schematically, the circlip shown in Figure 1 from the opposite side to that shown in Figure 2.
Figure 4 is a sectional view of the circlip of Figures 2 and 3 taken at right-angles to the view shown in Figure 3.
Referring to the drawings, the valve shown in Figure 1 has a body 1, a valve member 2 and a hand-wheel 3. Operation of the valve member 2 is by means of an essentially square cross-section extension 4 of the hand-wheel 3 which is received by a corresponding, essentially square second cross-section hole in the valve member. All the components are made of plastic.
With regard to the method of fixing the handwheel 3 to an upwardly extending body portion 5, this is achieved by means of a circlip 6.
The circlip 6 comprises an essential "C" shaped ring of plastic having along its entire length outwardly pointing flange 7 and a cam surface 8.
It is also provided with lugs 9 and 10 and with arms 11 and 12.
A groove is defined on the outer face of the body portion 5 by means of protrusions (not shown in Figure 1) and a flange 13 on the body portion 5. For convenience the a gap in the circlip, and hence the arms 11 and 12 also, are kept directly above the valve inlet by means of a further protrusion 14 on the body portion 5 which cooperates with lugs 9 and 10 of the circlip.
The size of the circlip when not compressed is such that, although it is held in position by means of the lugs and protrusions described above, it is free to be compressed, and hence reduce its diameter, about the valve body portion 5.
The hand-wheel 3 is essentially cup-shaped and has a groove 1 5 on its inside wall; it also possesses a cam surface between the groove and the lip of the "cup".
To fix the hand-wheel to the body portion, the circlip is positioned about the body portion in a position defined by the lugs and protrusions on the body portion and the hand-wheel is located so that its cam surface contacts the cam surface of the circlip. Downward pressure on the hand-wheel causes engagement of the cam surfaces and a reduction in the diameter of the circlip and finally a snap-fit between the flange 7 and the groove 1 5 as shown in Figure 1.
When the hand-wheel is locked in position, it may be necessary in certain cases to provide an additional component which is positioned between arms 11 and 12 to keep these arms apart and hence ensure tight engagement between the flange and groove.

Claims (7)

1. Means for releasably securing a hand-wheel to a body portion of a fluid flow control valve, which comprises locating a circlip about the body portion and preventing substantial movement of the circlip relative to the body portion other than compression of the circlip to reduce its diameter about the body, providing either the circlip or the hand-wheel with a flange and the other of these two components with a groove so that the flange and groove can be snap-fitted into locking engagement, and provide means for releasing the locking engagement whilst the hand-wheel is secured to the body portion.
2. Means according to Claim 1 in which the hand-wheel possesses the groove and the circlip possesses the flange.
3. Means according to Claim 1 or Claim 2 in which one or both the flange or groove have a cam surface which facilitate mating between the flange and the groove.
4. Means according to any preceding Claim in which the body portion is provided with protrusions or lugs to guide and hold the circlip in the correct position.
5. Means according to any preceding claim in which arms are provided at each end of the circlip which protrude outside the hand-wheel and which can be urged together to reduce the radius of the circlip.
6. Means according to any preceding claim in which guides are provided on either the body portion or the circlip to ensure that the arms for releasing the hand-wheel are always positioned at the same place relative to the body.
7. Means according to Claim 1 substantially as herein described with reference to any one of Figures 1 to 4.
GB8204396A 1981-02-13 1982-02-15 Fluid flow control valve Expired GB2093164B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8204396A GB2093164B (en) 1981-02-13 1982-02-15 Fluid flow control valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8104539 1981-02-13
GB8204396A GB2093164B (en) 1981-02-13 1982-02-15 Fluid flow control valve

Publications (2)

Publication Number Publication Date
GB2093164A true GB2093164A (en) 1982-08-25
GB2093164B GB2093164B (en) 1985-07-17

Family

ID=26278429

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8204396A Expired GB2093164B (en) 1981-02-13 1982-02-15 Fluid flow control valve

Country Status (1)

Country Link
GB (1) GB2093164B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000708A1 (en) * 1992-06-19 1994-01-06 Nefit Industrial B.V. Valve
WO2000059416A1 (en) * 1999-04-06 2000-10-12 Ssl International Plc A tap

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000708A1 (en) * 1992-06-19 1994-01-06 Nefit Industrial B.V. Valve
WO2000059416A1 (en) * 1999-04-06 2000-10-12 Ssl International Plc A tap
US6722624B1 (en) 1999-04-06 2004-04-20 Coloplast A/S Tap

Also Published As

Publication number Publication date
GB2093164B (en) 1985-07-17

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20020214