DE8510994U1 - Captive locking screw - Google Patents

Description

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Knorr-Bremse GmbH Munich, April 11, 1985 Moosacher Strasse 80 TP-ku

8000 Munich 40 our reference: - 1842 -

Text no .: 0097P

Captive locking screw The invention relates to a captive screw plug for

Container or housing openings, and it is based on the task of to design such a screw plug easy and inexpensive to manufacture and handle.

This object is achieved according to the invention in that of the Inside the container or housing facing the end face of the locking screw body protrudes a wire body with a At least approximately coaxially to the locking screw body extending wire section attaches to the end face and at a distance therefrom End face ends with an elastically deformable ring section, the axes of the locking screw body and the ring section run approximately at right angles to each other and the outer diameter of the ring section is larger than the diameter of the container or Housing opening is.

In a further embodiment of the invention, it is useful when through elastic deformation of the ring section whose outer circumference is deformable into an oval, the smaller axis of which is approximately perpendicular to the axis of the Closure screw body runs and is at most equal to the diameter container or housing opening. To hold the Wire section on the locking screw body, it can also be useful if the wire section in a bore of the Locking screw body engages and by a connecting means, such as soldering, gluing or the like, firmly with this connected is.

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In the drawing is an embodiment for one after the Invention trained locking screw shown, namely shows ι Fig.l is a view of the screw plug and 2 shows a plan view and a side view of the,

unassembled wire body.

The captive screw plug has according to Fig.l a Lock screw body 1, which on the part of the interior of the Container or housing facing end face 2 a Threaded section 3 carries with an external thread. The container or the

Housing, the opening of which is to be closed by the screw plug is not shown as a whole; di ^ opening is to be closed limited by an internal thread on the container or housing wall, with which the threaded section 3 can be screwed. At the

Locking screw body 1 closes to the container resp.

On the outside of the housing, a flange section 4 adjoins the threaded section 3 and to this a professional lab section 5, according to Fig.l a hexagon. Of the

Lock screw body 1 thus has the usual shape of a Screw plug. The locking screw body 1 is axially pierced into the Piercing protrudes one end of a straight line

Wire section 6 of a wire body 7. The end of the wire section 6 is on the part of the profile section 5 with the locking screw body 1 soldered at 11 to close the perforation. On the side of the end face 2, the wire section 6 projects coaxially from the closure body 1 and merges at a distance from the end face 2 into an annular section 8 forming the end of the wire body 7 on the other side. The axis 9 of the screw plug body 1 and the axis 10 of the ring section 8 run approximately at right angles to one another. Of the The outer diameter of the ring section 8 is slightly larger than the diameter of the threaded section 3 and thus also slightly larger than the diameter of the housing opening which is to be closed by the locking screw.

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To assemble the screw plug, the ring section 8 is through the to sealing housing opening introduced into the container or housing interior, the ring section 8 by lateral compression B is to be elastically deformed into an oval; the smaller, approximately perpendicular to the axis 9 axis of the oval must when passing through the Ring section be smaller than the diameter of the housing opening. in the In the interior of the container or housing, the ring section 8 expands back into its original shape, so that the ring section 8 can no longer be easily passed through the housing opening. The screw plug is thus removed from the housing opening unscrewed state by means of the wire body 7 held captive on the container or the housing. To close the Gehauseoffnung is the locking screw body 1 with his

Screw the threaded section 3 into the housing opening as usual.

The captive locking screw is especially useful for locking Oil drain holes and oil overflow control holes in the crankcase of Suitable for compressors, but can also be used to close other types of container or housing openings.

short version

The captive screw plug for container or housing openings has a screw plug body (1) from whose end face (2) facing the interior of the container a wire body (7) protrudes. The wire body (7) has an approximately coaxial wire section (6) attached to the locking screw body (1), which is spaced from the end face (2) in a. Ring section (8) passes. The outer diameter of the ring section (8) is slightly larger than the diameter of the container or housing opening to be closed by the screw plug body (1), so that it can only be passed through the housing opening with elastic deformation and thus with a little effort.
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Knorr-Bremse GmbH Munich, April 11, 1983 Moosacher Strasse 80 TP-ku

8000 Munich 40 our reference: - 1842 -

5 Text no .: 0097P

List of reference symbols

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X VS 1 Locking screw body 2 Front side 3 Threaded section 4th Flange section 5 Professional cut 15th 6th Wire cut 7th Wire body 8th Ring section 9 axis 10 axis 20th 11th Soldering

Claims (3)

say 1. Captive screw plug for container or housing openings, characterized in that the end face (2) of the locking screw body facing the interior of the container or housing (1) a wire body (7) protrudes with a wire section running at least approximately coaxially to the locking screw body (1) (6) attaches to the front side (2) and at a distance from the front side (2) ends with oinem elastically deformable ring section (8), the Axes (9,10) of the locking screw body (1) and the ring section (8) run at right angles to each other and the outer diameter of the Ring section (8) is larger than the diameter of the container or housing opening. 2. Closure screw according to claim 1, characterized in that by elastic deformation of the ring section (8) whose outer circumference can be deformed into an oval whose smaller axis is approximately perpendicular to the axis (9) of the locking screw body (1) runs and at most equal to the The diameter of the container or housing opening is. 3. Closure screw according to claim 1 or 2, characterized in that that the wire section (6) engages in a bore in the locking screw body (1) and through a connecting means (Soldering, gluing or the like) is firmly connected to this.