SE457203B - CONDUCTOR CONTROLS IN A VENTILATION SYSTEM - Google Patents

Description

457 203 Characteristic of another advantageous embodiment of the invention is that each pipe stub is provided with rotation limiting means, such as for example a pin or a screw set up to cooperate with stop means on a connection pipe stub for limiting the rotational movement to said open and closed positions respectively. Thus, the pipe stubs are rotated in relation to each other only between the closed and the open position, the entire throttling device being stepless adjustable between the open and the closed position. If the boundary member consists of a screw, may be part of the pipe stubs read together either in a desired open or closed position, whereby they can not be rotated relative to each other.

The invention is described in the following by means of a example by referring to the accompanying drawing, where Figure 1 shows the throttling device seen from the side, there a pipe stub and the end cap are detached from the throttling device, Figure 2 shows a cross section taken along the line II-II in Figure 1, Figure 3 shows the same as Figure 2, but in a different, ie closed position.

The pipe portion of the throttling device, where the heel 1 is located, consists of several successive pipe stubs 2, which partially overlap each other so that the holes 1 in the pipe stubs 2 in the open position abut each other, figure 2, and in it finally, turn the position next to each other, the heel being end, figure 3. The pipe stub 2 consists of two different sizes, at attached ring mane parts, where at both there are round walking rows of pipes 1. The pipe stubs 2 are provided with a bounded member, such as with a pin 3, where the corresponding recess 4 at the opposite pipe stub allows a certain small rotation movement between the open and the closed position. 457 203 The end of the throttling device is closed with the lid 5, to which also the motor that regulates the throttle arrangement can be connected for coming from the rotary motion. The throttling device is closest intended to be placed in an enclosed space or a drawer, which can act as a pressure lowering chamber or distribution box.

It will be apparent to one skilled in the art that the invention does not limit itself to the example given above, without it may vary within the scope of the appended claims.

Claims (3)

457 203 P A T E N T K R A V A choke device for pipes in a ventilation system in which the jacket of the pipe has been provided with holes (1), which can be closed if necessary to effect the choke, characterized in that a part provided with holes (1) on each of a a plurality of successive pipe stubs (2), which partially overlap each other so that said perforated part of a pipe stub cooperates with a corresponding perforated part of a connecting pipe stub, the holes in the two parts coinciding with each other in the open position of the device and in the closed position of the device, in which the pipe stubs have been rotated relative to each other, are offset relative to each other so that the holes in the respective perforated part are closed. Throttling device according to claim 1, characterized in that each pipe stub (2) consists of two different sized ring jacket parts attached to each other, each of which is provided with circumferential rows of holes (1). Throttling device according to claim 1 or 2, characterized in that each pipe stub is provided with rotation-limiting means (3), such as for example a pin or a screw, arranged to cooperate with stop means (U) on a connecting pipe stub for limiting the rotational movement to the mentioned open and closed position, respectively. 88 07 l5