One-way braking device

Abstract

A one way braking means comprising a first sealed chamber filled with a viscous fluid, a braking rotor being rotably supported within the chamber, a housing or the braking rotor, respectively, coacting with a pinion which in turn cooperates with a tooth rod or a gear or the like, characterized in that the first housing is floatingly supported in a second chamber of a second housing, the circumference of the first housing and a locking portion of the wall of the second chamber are formed such that a positive interengagement between first and second housing takes place if by a linear first force component the first housing and the locking portion are moved against each other and that a free running between first and second housing is effected when a second force component opposite to the first component effects between first and second housing.

1 . A one way braking means comprising a first sealed chamber filled with a viscous fluid, a braking rotor being rotably supported within the chamber, a housing or the braking rotor, respectively, coacting with a pinion which in turn cooperates with a tooth rod or a gear or the like, characterized in that the first housing ( 18   a ,  18   b ,  18   c ) is floatingly supported in a second chamber ( 16   a ,  16   b ,  16   c ) of a second housing ( 10   a ,  10   b ,  10   c ), the circumference of the first housing ( 18   a ,  18   b ,  18   c ) and a locking portion of the wall of the second chamber ( 16   a ,  16   b ,  16   c ) are formed such that a positive interengagement between first and second housing ( 18   a ,  18   b ,  18   c ;  10   a ,  10   b ,  10   c ) takes place if by a linear first force component the first housing ( 18   a ,  18   b ,  18   c ) and the locking portion are moved against each other and that a free running between first and second housing is effected when a second force component opposite to the first component effects between first and second housing ( 18   a ,  18   b ,  18   c ;  10   a ,  10   b ,  10   c ).  
     
     
         2 . The means of  claim 1 , wherein a circumference of the first housing ( 18   a ,  18   b ,  18   c ) has a toothing ( 22 ) and the second chamber ( 16   c ) has toothed portion ( 32 ).  
     
     
         3 . The means of  claim 1 , wherein the locking portion has two spaced locking edges ( 28 ,  30 ) which cooperate with preferably groove shaped recesses ( 20 ) at the circular circumference of the first housing ( 18   b )  
     
     
         4 . The means of  claim 1 , wherein the circumference of the first housing ( 18   a ) is a polygon in section and the locking portion is shaped as complementary polygonal portion ( 24 ).  
     
     
         5 . The means of one of the  claims 1  to  4 , wherein the second chamber ( 16   c ) of the second housing ( 10   c ) is defined within an annular portion ( 38 ), the open side of the annular portion ( 38 ) is covered by a cap which overgrips the annular portion ( 38 ).  
     
     
         6 . The means of one of the  claims 1  to  4 , wherein the whole parts are molded of plastic material.  
     
     
         7 . The means of claims  5  and  6 , wherein the cap ( 40 ) forms a snapping connection with the annular portion ( 38 ).