Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1998-10-14
1999-12-21
Donovan, Lincoln
Valves and valve actuation
Electrically actuated valve
Including solenoid
25112917, 335220, 335251, 335255, F16K 3102
Patent
active
060038381
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an electromagnetic valve according to the preamble.
German patent application No. 42 21 988 discloses attaching a retaining member in the shape of a valve cartridge into the opening of a housing by means of a double self-calking engagement. The self-calking engagement essentially includes an indentation on the outside periphery of the retaining member into which the housing material is displaced by the advance movement during the assembly of the retaining member to provide a form lock. The disclosed attachment device is exclusively limited to mounting and closing the housing by the retaining member which has an electromagnetic valve. This necessitates separate attachment devices and provisions for the other, functionally relevant elements of the electromagnetic valve, what increases the expenditure in terms of structure and manufacture.
An object of the present invention is to improve upon an electromagnetic valve of the above-mentioned type to such effect that a simple, functionally reliable and small-size valve assembly for universal applications is provided with minimum expenditure in terms of structure and manufacture.
According to the present invention, this object is achieved in an electromagnetic valve of the generic type by the characterizing features of patent claim 1.
Further features, advantages and possible applications of the present invention can be seen hereinbelow in the subclaims and the description of several embodiments, making reference to the accompanying drawings.
In the drawings,
FIG. 1 is an enlarged structural view of some elements of the present invention.
FIG. 2 is a special embodiment of the present invention implemented in an electromagnetic valve.
FIG. 3 is a variation of constructive details of the electromagnetic valve illustrated in FIG. 2.
FIG. 1 shows in a substantially enlarged view details of the subject matter of the present invention before the press-in operation is performed. A housing with a cylindrical opening 7 can be seen, into which extends, in sections, a cylindrical retaining member 2 with a shaped part 3 mounted on it. The shaped part 3 interposed between the housing 1 and the retaining member 2 which extends until an indentation 4 in the retaining member 2. The shaped part 3 covers the width of the groove-shaped indentation 4 in the retaining member 2 at least in part. Exactly as the retaining member 2, the shaped part 3 is configured as a sleeve in the present embodiment. The open end area of the shaped part 3 snugs largely against the inside and outside contour of the sleeve-shaped retaining member 2 and embraces the small-diameter end surface area of the retaining member 2 in the form of a circumferential groove on the retaining member 2. The indentation 4 provided on the outside periphery of the retaining member 2 between the two piston portions of the retaining member has an undercut 6. Between the undercut 6 and the outside contour of the retaining member 2, there is a wedge profile 5 (in the longitudinal cross-section in the drawing) having a wedge angle .alpha. between the undercut 6 and the outside contour which is smaller than 90.degree.. This is an advantage in terms of manufacture both for the displacing effect of the housing material, which plastically deforms into the indentation 4, and the deformation of the shaped part 3 which must yield along with the housing material into the indentation 4. The above-mentioned final deformation and gas-tight and fluid-tight connection after the self-calking operation by the application of an outside axial force on the retaining member 2 may easily be seen in a special constructive embodiment in FIG. 2 which is in conformity with the demands of application. In consideration of the main elements of the attachment device shown in FIG. 1, it should be mentioned that when calking the retaining member 2, not only the material of the housing 1 (which is softer compared to the retaining member 2) is also displaced into the open end of the shaped part 3 into the indentation 4. Furthe
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Search Report of the German Patent Office Relating to German Patent Application 196 03 383.7.
Donovan Lincoln
ITT Manufacturing Enterprises Inc.
Nguyen Tuyen
LandOfFree
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