JPS6127612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closure for blind wall mounting, and more particularly to a closure that is leak-proof and, in addition to providing a seal for repairing or closing an aperture,
The present invention relates to a closure of this type which can form a workpiece to which instruments, pipes or fittings can be connected.

Previously, devices have been proposed that are adapted to be attached to a blind wall or to a receptor to be occluded, some of which utilize movable arms or toggle-like internal portions; After those parts are inserted into the holes in the wall,
It is adapted to cooperate with external fasteners that engage the interior surface in some way and secure the assembly to the wall. A device of this type is disclosed in US Pat. No. 2,360,395. Also, for example, U.S. Patent No.
Other devices, such as those disclosed in 3401958 and 3244056, use internal flanges shaped to be inserted into circular apertures. The internal flanges are inserted into the circular aperture and later rotated to overlap the circular aperture. clamped against the blind wall by the cooperative action of the external flange and the captured sealing means;
A solid assembly is formed. U.S. Patent No. 3193662
No. 1, which utilizes an oval aperture in the tank wall and an oval internal flange similar to the present invention, however, that patent states that oval or non-circular shapes are required for assembly during the installation process. Having only been shown to be advantageous in preventing rotation, the device disclosed therein is not suitable for application to blind wall mounting.

All of these conventional devices provide a simple and easy-to-install means for sealing leaks in blind walls or for mounting certain devices and couplings on the blind walls of tanks or other vessels. It's not a thing. The inventors have discovered that the above objects can be achieved by utilizing a unique elliptical shape in combination with a positioning and interference recess and an annular groove containing sealing means. The holes in the blind wall may be oval in shape or may simply have the characteristic of an oval shape, with corresponding maximum and minimum diameters.
In this way, the hole can be easily formed in the blind wall using two circular drills or cutting tools. Means is provided for holding the flange in sealing engagement with the blind wall by rotating a nut on an externally threaded connection projecting outwardly from the surface of the flange.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, an oval aperture 11 is cut into a blind wall 12 to be repaired or to be fitted with a fixture, coupling or other device. This aperture must have dimensions such that its maximum diameter is greater than the minimum diameter of the oval internal flange 20. The elliptical internal flange 20 is formed with an elliptical groove 21 positioned on the circular surface of the flange surface 22 . A sealing means 23 is arranged within the oval groove 21 . Although an oval O-ring 23 is shown in this example, other sealing means may be satisfactorily used. Attached to the flange is an externally threaded connection 30 having an external thread 31 at an angle of 90 DEG to the surface containing the groove for communication or attachment purposes. A combination of fasteners and bolts can also be used. Recesses 25a and 25b facilitate positioning of the flange relative to the blind wall and prevent rotation during assembly of the parts. An oval support flange 33 is fitted into the male threaded connection and is seated on the outer wall 34. A fastener 35, shown as a nut in the figures, is rotationally tightened onto the external threads of the externally threaded connection 30 to draw the internal flange 20 against the front wall surface 24. Seal means 23 within the annular groove 21 interact with the inner wall 24 under assembly pressure to form an air or liquid tight seal.

The same pressure forces the support flange 33 against the outer wall surface 34, covering the oval aperture and serving to strengthen the final assembly. A sealing means 23 is inserted into the oval groove 21 of the flange 20. The flange 20 is held by a male threaded connecting portion 30 inserted through the oval hole 11, and with the recesses 25a and 25b positioned inside the hole 11, the flange 20 is held against the inner wall surface. 24 in a semi-sealed position. An elliptical support circular flange 33 is fitted onto the externally threaded connecting portion 30 which is seated against the outer wall surface 34 .
Fastener 35 on screw 31 of externally threaded connection 30
are rotationally tightened, thereby drawing all the parts together into sealing engagement with the wall. FIG. 3 shows another embodiment of the invention, which replaces the oval aperture 11 in the embodiment shown in FIG. This is a case where the present invention is applied to a wall 60 in which a hole 61 is formed, and this hole 61 is formed in a metal portion 6 of the wall 60 as shown in FIG.
5a, 65b, 65c and 65d around it.

[Brief explanation of the drawing]

1 is an exploded perspective view showing the wall aperture, flange, sealing means and other parts according to one embodiment of the invention; FIG. 2 is a sectional view of the device shown in FIG. 1; and FIG. FIG. 4 is an exploded perspective view showing another embodiment of the present invention in which an aperture that is not elliptical but has important elliptical characteristics is formed in the wall; FIG. 4 shows another shape of the aperture to which the present invention can be applied. 11 is a plan view showing an example of
is an oval opening, 12 is a blind wall, 20 is an internal flange, 21 is an oval groove, 22 is a flange surface, 23
is an O-ring, 25a and 25b are recesses, 30 is a male threaded connection part, 33 is a support flange, 34
35 is a fastening means, 60 is a wall, and 61 is an opening.

Claims (1)

Claims: 1. A self-sealing flange device adapted to be removably mounted around a generally elliptical aperture formed in a blind wall or similar structure, comprising: a generally oval aperture;
an elliptical flange to which an externally threaded connection is fixed at an angle of 90°, the surface in which the externally threaded connection is positioned, the surface of which includes an elliptical groove around the outer periphery; at least one outwardly extending recess at each end of the oval flange between; an oval seal disposed within the oval groove; an oval washer; and the coupling portion. a self-sealing flange comprising threaded fasteners that interact with threads of the flange assembly to attract parts of the flange arrangement into sealing engagement with the inner and outer surfaces of the wall surrounding the oval aperture; Device.