Displacement mechanism
AssigneeBritish Aerospace Public Limited Company
InventorAlan R. Bithrey
Life of this patent
Estimating the term…
Abstract
A displacement mechanism for effecting both rotary movement of a movable member (for example a fin) with respect to a fixed member (for example a flight vehicle body) from a first, inoperative position to a second, operative position about a longitudinal axis and axial movement of the movable member along that axis to effect subsequent locking in the second position, comprises a fluid operated vane motor to effect rotation and a fluid operated piston/cylinder arrangement to effect the axial movement. Preferably the vane motor and the piston/cylinder arrangement are closely integrated one with another.
Claims2
A flight vehicle having:
- body means;
- fin means capable of rotary movement from an inoperative position to an operative position about an axis and of axial movement along said axis to effect locking;
- displacement mechanism to effect such rotary and such axial movement;
- and
- locking means to effect locking on such axial movement;
- said displacement means including vaned stator shaft means fixedly carried by said vehicle body means;
- vaned rotor cylinder means carrying said fin means, said stator shaft means extending co-axially through said rotor means in sealing engagement therewith to provide a torque and an axial force producing pressure fluid chamber and to also provide a further axial force producing pressure fluid chamber;
- duct means for supplying pressure fluid to said torque and axial force producing pressure fluid chamber;
- and
- further duct means for supplying pressure fluid to said further axial force producing pressure fluid chamber, said further duct means having valve means effective to supply pressure fluid to said further chamber thereby to prevent movement of said fin means until rotational movement is complete and subsequently to allow venting of said further chamber while supply of pressure fluid is continued to said torque and axial force producing pressure fluid chamber thereby to effect axial locking movement.
Dependencies are inferred from the claim text.