Rotary actuator device

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 31/163 (2006.01) F15B 15/08 (2006.01)

Patent

CA 2102226

A pressure controlled actuator mechanism (10) is disclosed for imparting rotary control motion to devices, such as valves, having rotary control means. The actuator includes a free-floating piston (20) movably and concentrically disposed within an airtight cylindrical housing (16). A non-rotating receptacle (36), having helically spiralled recesses therein, is attached therein to a support member (30) that is adapted to move in response to the free-floating piston (20). A rotatable shaft (42), one end of which mates with the helically spiralled recesses of the receptacle, is attached at its other end to a device having a rotary control means. A downward stroke of the receptacle rotates the shaft and activates the device. The support member (30) is spring biased to return the free-floating piston (20) to a starting position. In an alternative embodiment, the free-floating piston (20) is movably and concentrically attached to the support member (30) for travel therewith. In this embodiment, a second pressure medium is introduced into the housing to cause the piston and support member to return to a starting position.

Mécanisme actionneur contrôlé par pression (10) pour imprimer un déplacement rotatif à des dispositifs, comme des soupapes, munis d'un dispositif de commande rotatif. L'actionneur comprend un piston libre (20) placé de manière amovible et concentrique à l'intérieur d'un boîtier cylindrique étanche à l'air (16). Un logement non rotatif (36), muni de rainures en spirales, est fixé à l'intérieur à un support (30) configuré pour se déplacer en réponse au piston libre (20). Un arbre rotatif (42), dont une extrémité est en liaison avec les rainures du logement, est fixé à son autre extrémité à un dispositif muni d'un dispositif de commande rotatif. Une course descendante du logement fait tourner l'arbre et actionne le dispositif. Le support (30) est comprimé par un ressort pour retourner le piston libre (20) à une position de départ. Dans un autre modèle, le piston libre (20) est fixé de manière amovible et concentrique au support (30) pour se déplacer avec lui. Dans ce modèle, un deuxième médium de pression est introduit dans le boîtier pour permettre au piston et au support de retourner à une position de départ.

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