초록 ▼

The present invention resides in an elevator mechanism comprising a base plate defining the bottom wall of a chamber disposed above the base plate. The base plate has a top surface and a bottom surface with an opening therein communicating between the top and bottom surfaces. A first drive is dispos

The present invention resides in an elevator mechanism comprising a base plate defining the bottom wall of a chamber disposed above the base plate. The base plate has a top surface and a bottom surface with an opening therein communicating between the top and bottom surfaces. A first drive is disposed below the base plate for linear movement parallel to a first given direction. A carriage is connected for movement to the first drive and carries a lift tube extended upwards from the carriage along the given direction and through the opening in the base plate. The lift tube including a coaxially disposed rotary shaft therewithin. A second drive having an output is provided and is supported on the carriage parallel to the given direction and spaced from the rotary shaft in a side-by-side orientation. A coupling is also provided for drivingly connecting the output of the second drive to the rotary shaft.

대표청구항 ▼

[ What is claimed is:] [15.] A rotary linear drive comprising:a base;a linear positioning device extending in a given direction and having a first and second ends secured within said base;a first rotary drive, said rotary drive being secured to said base and drivingly coupled to said linear position

[ What is claimed is:] [15.] A rotary linear drive comprising:a base;a linear positioning device extending in a given direction and having a first and second ends secured within said base;a first rotary drive, said rotary drive being secured to said base and drivingly coupled to said linear positioning device;a carriage connected to said linear positioning device for movement along said given direction in response to energization and reverse energization of said first rotary drive;said carriage having a support base surface which extends generally perpendicularly to said first given direction;a lift tube supported on said support base at the lower end thereof and having a hollow internal confine for receiving a rotary shaft therein;said rotary shaft having a length longer than the length of said lift tube so as to extend upwardly beyond one end of said lift tube and to depend downwardly therefrom and through an opening formed in said support base to define a depending connecting portion thereon;a second drive mounted to said carriage and having an output for causing rotation of said rotary shaft;a coupling means for drivingly coupling the output of said second drive to the rotary shaft for effecting rotation in either rotational direction; andcontrol means for controlling the ON and OFF conditions of said first and second drives.