Rodent Entry Prevention Device

Abstract

The present invention relates to a device ( 1 ) for preventing entry of a rodent through a pipe comprising a jacket ( 2 ), a first gate plate ( 3 ) and a locking device ( 4 ), where the jacket ( 2 ) is adapted for mounting in the discharge pipe, where the first gate plate ( 3 ) is pivotally arranged inside the jacket ( 2 ), and where the locking device ( 4 ) is arranged in connection to the first gate plate ( 3 ), wherein a second gate plate ( 6 ) is pivotally arranged at a distance (X) from the first gate plate ( 3 ) inside the jacket ( 2 ) and connected to the first gate plate ( 3 ) by means of a connection assembly ( 8 ).

1 . Device ( 1 ) for preventing entry of a rodent into a building through a pipe comprising a jacket ( 2 ), a first gate plate ( 3 ) and a locking device ( 4 ), where the jacket ( 2 ) is adapted for mounting in the discharge pipe, where the first gate plate ( 3 ) is pivotally arranged inside the jacket ( 2 ), and where the locking device ( 4 ) is arranged in connection to the first gate plate ( 3 ), wherein said jacket has a shape substantially corresponding to the inner shape of the pipe and an extend covering more than half of the circumference of said pipe, and that a second gate plate ( 6 ) is pivotally arranged at a distance (X) from the first gate plate ( 3 ), inside the jacket ( 2 ) and in communication with the first gate plate ( 3 ) by means of a connection assembly ( 8 ). 
   
   
       2 . Device ( 1 ) according to  claim 1 , wherein the connection assembly ( 8 ) comprises a push rod ( 9 ) and a guidance pipe ( 10 ), where the push rod ( 9 ) is pivotally connected to the second gate plate ( 6 ), and where the guidance pipe ( 10 ) is arranged on part of the push rod ( 9 ), and where the first gate plate ( 3 ) is provided with an aperture ( 19 ) adapted to interact with the push rod ( 9 ). 
   
   
       3 . Device ( 1 ) according to  claim 1 , wherein the locking device ( 4 ) comprises a locking clamp ( 11 ) and a pivotal detent ( 12 ), the locking clamp ( 11 ) being connected to the first gate plate ( 3 ) and the detent ( 12 ) being pivotally connected to the jacket ( 2 ). 
   
   
       4 . Device ( 20 ) according to  claim 1 , wherein the connection assembly ( 21 ) comprises a first tension rod ( 22 ) and the locking device ( 23 ) comprises a hook member ( 24 ) and a locking pin ( 25 ), and where the first tension rod ( 22 ) is pivotally connected to the second gate plate ( 6 ), and where the hook member ( 24 ) is pivotally arranged inside the jacket ( 2 ) and pivotally connected to the first tension rod ( 22 ), and where the locking pin ( 25 ) is connected to the first gate plate ( 3 ). 
   
   
       5 . Device ( 30 ) according to  claim 1 , wherein the connection assembly ( 31 ) comprises a second tension rod ( 32 ), a guidance tube ( 33 ), a guidance strap ( 34 ) and the locking device ( 35 ) comprises a locking pin ( 36 ), where the second tension rod ( 32 ) is pivotally connected to the second gate plate ( 6 ) and connected to the guidance strap ( 34 ), which is arranged inside the jacket ( 2 ) between the first and second gate plates ( 3 ,  6 ), and where the locking pin ( 36 ) is connected to the first gate plate ( 3 ). 
   
   
       6 . Device ( 1 ) according to  claim 1 , wherein the distance (X) between the first gate plate ( 3 ) and the second gate plate ( 6 ) is minimum 30 mm, preferably more than 50 mm. 
   
   
       7 . Device ( 1 ) according to  claim 1 , wherein the jacket ( 2 ) is provided with a number of projections ( 17 ) arranged on an outer surface of the jacket ( 2 ). 
   
   
       8 . Device according to  claim 1 , wherein the connection assembly comprises a first notch ( 40 ) arranged on the second gate plate ( 6 ) and a pivotal pendulum member ( 41 ) adjacent the first gate plate ( 3 ) on the opposite side of said first gate plate ( 3 ) to the second gate plate ( 6 ), and that an aperture ( 42 ) is provided in the first gate plate ( 3 ) through which aperture ( 42 ) the pendulum member ( 41 ) may engage the first notch ( 40 ). 
   
   
       9 . Device according to  claim 8 , wherein the first and second gate plates ( 3 , 6 ) extend above the shafts ( 5 , 7 ) about which they pivot, and that the sections of the gate plates ( 3 , 6 ) extending above the shafts ( 5 , 7 ) are angled against the flow direction in relation to the plane of the gate plates. 
   
   
       10 . Device according to  claim 8 , wherein the pendulum member in its rest position partly projects through the aperture, and an engagement edge of the pendulum member engages an edge of the aperture in the first gate member, and when the first notch is brought into contact with the pendulum member, the pendulum member is released from its engagement with the first member such that the first gate may pivot.