Electromagnetically actuated valve

Details Electromagnetically actuated valve Electromagnetically actuated valve

1999-03-12

2001-11-20

Shaver, Kevin (Department: 3754)

Metal working

Method of mechanical manufacture

Valve or choke making

C251S129210

Reexamination Certificate

active

06317978

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an electromagnetically actuated valve.
BACKGROUND INFORMATION
German Patent no. 38 31 196 describes an electromagnetically actuated valve, which has a valve needle axially movable in a through bore of a valve seat support. The valve needle is formed by a cylindrical armature, a spherical valve closing body and a tubular or sleeve-shaped connection piece that connects those two components. The connection piece is made of a flat metal sheet that is subsequently rolled or bent until it assumes a cylindrical, sleeve-like shape. In this form, the connection piece has a slot extending over its entire axial length, which may run parallel or at an angle to the longitudinal valve axis. The two longitudinal end faces of the metal sheets used oppose one another, forming a constant-width slot between them.
German Application no. 40 08 675 describes an electromagnetically actuated valve, in which the valve closing body is attached to the connection piece with a welding seam, which is interrupted at least in the area of the longitudinal slot or also at other points in the peripheral direction.
SUMMARY OF THE INVENTION
The electromagnetically actuated valve according to the present invention has the advantage that it can be manufactured cost-effectively in a particularly simple manner due to the advantage of a connection piece with relatively great tolerances. Having light weight and high stability, the connection piece has a large hydraulic flow cross section area. Due to the fact that the slot extends over a large part of its axial length, the connection piece is spring-elastic at one end, which facilitates the connection to the armature. Due to its spring-like flexibility, the connection piece can be inserted in the inner opening of the armature with both of its half-shells under stress, so that the disadvantageous formation of chips during the assembly of the armature is avoided. On the other hand, the valve closing body can be attached to the unslotted end of the connection piece in a very simple and reliable manner without bridging slots. The slots of the connection piece made of a non-magnetic material prevent the formation of undesirable eddy currents.
It is particularly advantageous if the connection piece is made of a metal sheet by first punching and subsequently deep drawing sheet sections in a “wristwatch” shape. When deep drawing the sheet section, two sheet tabs that are formed are bent so that two half-shells with a semicircular cross section are obtained, the slot being formed by the long end faces of the two sheet tabs opposing one another with a short distance between them.
In an advantageous manner, the rigid attachment of the valve closing body, which is spherical, for example, can be achieved using a welding seam over the entire 360° periphery of the connection piece at its unslotted, non-elastic end, which has a very high dynamic strength due to its full contact with the connection piece. The advantage is the simple and reliable manner the components can be handled when the welding seam is applied, which has no interruptions due to the peripheral end of the connection piece and is also very homogeneous.


REFERENCES:
patent: 4915350 (1990-04-01), Babitzka et al.
patent: 4946132 (1990-08-01), Reiter
patent: 5178362 (1993-01-01), Vogt et al.
patent: 5199648 (1993-04-01), Fujikawa
patent: 5360197 (1994-11-01), Reiter et al.
patent: 5566920 (1996-10-01), Romann et al.
patent: 5649360 (1997-07-01), Schwarz
patent: 5875975 (1999-03-01), Reiter et al.
patent: 5927613 (1999-07-01), Koyanagi et al.
patent: 6012701 (2000-01-01), Reiter
patent: 38 31 196 (1990-03-01), None
patent: 40 08 675 (1991-09-01), None
patent: 44 26 006 (1996-01-01), None

Affiliated with

Also associated with

Rating

Electromagnetically actuated valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electromagnetically actuated valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetically actuated valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2591453