Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve
Patent
1994-06-29
1997-04-15
Rivell, John
Fluid handling
With repair, tapping, assembly, or disassembly means
Assembling, disassembling, or removing cartridge type valve
25112915, 411549, F16K 3102, F16K 5100
Patent
active
056200196
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an operating device with a top part having an actuating arrangement for driving a control member, and a bottom part carrying the top part, wherein the top part and the bottom part are releasably connected with one another by means of a bayonet lock wherein essentially radial projections on one of the parts are held in the other part, the connection being effected by inserting the projections into recesses in the other part and turning the two parts in relation to each other.
Such an operating device is known from DE 40 13 875 A1. This publication relates to an electromagnetic valve, in the top part of which there is provided an armature and an energizing coil and in the bottom part of which there is provided a valve seat and corresponding inlet and outlets.
The top part and the bottom part are joined together by a bayonet joint. In the one part there is provided an oval opening for inserting of the other part, said opening having at two 180.degree. displaced places an undercut recess (26) which extends radially each over 90.degree.. The other part having radial side extensions (16) corresponding to the diameter of the free part (29) of the oval opening. By turning the one part (the upper part) 90.degree. the radial extension moves into the undercut recess (25). This joint is expensive, the half of the magnetic acutator part (10) is picked up by the valve housing (22), and the magnetic actuator is not locked in the mounted position, and may due to e.g. vibrations loosen after some time. Therefore it is necessary to lock the magnetic actuator by means of a wall part (33) of a not shown cover, picking up the electric connector pins
DE 36 09 366 C2 shows a corresponding bayonet joint in which knob-like extensions (10,13) provides for catch-in locking of the parts. Such a locking is not reliable.
An operating device is further known, for example, from EP 0 151 563 A2. That publication relates to an electromagnetic valve, in the top part of which there is provided an armature and an energizing coil and in the bottom part of which there is provided a valve seat and corresponding inlet and outlets. The top part and the bottom part are screwed together, that is to say, the top part has a foot with an external thread which is screwed into an internal thread in a bore in the bottom part. In order to join the top part and the bottom part together, it is necessary to rotate the top part several times relative to the bottom part. This can lead to difficulties if the upper part has already been electrically wired up, that is to say, its electrical connections have already been connected to cables.
Another operating device, which is also in the form of an electromagnetic valve, is known from EP 0 428 728 A1. Here, the top part and bottom part are joined to one another by screw bolts, which are guided through the top part and are screwed into the bottom part. Several bolts have to be provided in the circumferential direction in order to ensure that the top part and the bottom part are evenly clamped. This operating device is therefore not very easy to assemble.
Another operating device in the form of an electromagnetic valve is known from DE 32 19 799 A1, in which the magnetic system is mounted in an insulation sleeve also surrounding the armature and an armature tube. The insulating sleeve carries a mounting foot. At one end this has a snap-fit device, by means of which the magnetic system can be locked in a housing. The snap-fit device has locking projections which may optionally be forcibly deformed under heat in order to fix the magnetic system permanently in the housing. The reliability of an operating device of that kind is suspect if it is to be operated over a relatively long period of time with a large number of operating cycles, because the snap-fit connection can become loose through fatigue or the plastics material forcibly deformed under heat may break.
The invention is therefore based on the problem of providing an operating device in which in a simple manner the top part and the bott
REFERENCES:
patent: 2100816 (1937-11-01), Purnton
patent: 2374679 (1945-05-01), Hallock
patent: 3917218 (1975-11-01), Marocco
patent: 4842010 (1989-06-01), Edgecomb et al.
patent: 5102096 (1992-04-01), Siegel et al.
Danfoss A/S
Rivell John
LandOfFree
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