F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/61
F15B 15/08 (2006.01) B66C 23/86 (2006.01)
Patent
CA 1292660
FLUID-POWER BEARING ACTUATOR Abstract of the Disclosure A fluid-powered rotary actuated support for a plat- form, having a body with a vertical axial orientation during use. A drive member has a drive shaft extending coaxially within the body and a flange attached to an end portion of the shaft toward an upper body end. The shaft and flange are formed as an integral unit free of connection joints there- between. The flange projects radially outward from the shaft beyond an inner body surface and is rotatable relative to the body through a horizontal plane. A first ball race is formed in the flange and a second ball race is formed in the body with balls disposed therebetween. Linear-to-rotary transmission means disposed within the body are operable for providing rotational movement between the drive member and body. The body utilizes a stationary seal to facilitate seal placement and reduce the overall length of the body. In one embodiment, the transmission means includes a plurality of rollers each having at least two roller disks adjustably axially movable relative to each other within a limited range for backlash elimination purposes. The rollers are rotatably disposed on spindles, each having a free end portion attached to an annular support plate and an opposite end portion rota- tably disposed in a piston sleeve bore hole for rotational adjustment of the spindles to axially move the support plate and apply an axial force on the roller disks.
583108
Oyen Wiggs Green & Mutala
Weyer Paul Peter
LandOfFree
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