Rotary cylinder and automatic collect holder

Claim 1

Apparatus of the type described, comprising in combination, fluid operated rotary drive means including a housing having a tubular drive shaft journaled therein, said drive means selectively rotating said drive shaft in one direction or the other, adjuster means mounted to one end of said housing, said drive shaft extending into said adjuster means, an arm mounted to said drive shaft and located within said adjuster means, said adjuster means including a pair of adjustable stops which coact with said arm for setting two respective angular positions to which said drive shaft is driven by said drive means, a collet holder positioned at the other end of said housing, said drive shaft extending into said collet holder and secured thereto, thrust bearing means positioned between said collet holder and said housing a collet axially movable in said collet holder, a reciprocable drive rod extending through said drive shaft and secured at one end to said collet, fluid operated means mounted to the end of said adjuster means opposite said drive means and connected to said drive rod for axially moving said collet relative to aid collet holder to open and close said collet, said drive rod extending through said fluid operated means, and means mounted to the end of said rod opposite the end to which said collet is connected to permit manual operation of said collet.