Oil-less Pneumatic Motor
AssigneeMedtronic PS Medical, Inc.
InventorMd Zahedul HUQ
Life of this patent
Estimating the term…
Abstract
The pneumatic drill has member defining an air input and an air output and a housing defining an internal cylindrical chamber having bearing surfaces having a through axis. A driven shaft is coupled to the tool engaging chuck that defines a plurality of longitudinal slots. The driven shaft is disposed within the chamber and has a longitudinal axis offset from the through axis. A plurality of vanes each being partially formed of graphite that are individually disposed within one of the plurality's of longitudinal slots. Two of the vanes, the housing, and the driven shaft define a moving compression chamber.
Claims19
A pneumatic drill comprising:
- a tool engaging chuck;
- a pneumatic motor having:
- a member defining an air input and an air output;
- a housing defining an internal cylindrical chamber having bearing surfaces having a through axis;
- a driven shaft coupled to the tool engaging chuck, said driven shaft defining a plurality of longitudinal slots, said driven shaft being disposed within the cylindrical chamber and having a longitudinal axis offset from the through axis;
- a plurality of vanes comprising graphite, the plurality of vanes individually disposed within one of the plurality of longitudinal slots;
- and
- wherein two of the vanes, the housing, and the driven shaft define a compression chamber.
A pneumatic drill comprising:
- a pneumatic motor having:
- a housing defining an internal cylindrical chamber having bearing surfaces having a through axis and defining an air input and an air output;
- a driven shaft defining a plurality of longitudinal slots evenly spaced about a circumference of the driven shaft, said driven shaft being disposed within the chamber and having a longitudinal axis offset from the through axis;
- a plurality of vanes comprising graphite individually disposed within one of the plurality of longitudinal slots;
- and
- wherein two of the vanes, the housing, and the driven shaft define a compressed gas receiving chamber.
A pneumatic drill comprising:
- a pneumatic motor having:
- a housing defining an internal cylindrical chamber having bearing surfaces having a through axis;
- a driven shaft defining three longitudinal slots, said driven shaft being disposed within the cylindrical chamber and having a longitudinal axis offset from the through axis;
- first, second, and third vanes comprising graphite, the first, second, and third vanes individually disposed within one of the three longitudinal slots;
- and
- wherein the first and second of the vanes, the housing, and the driven shaft define a high pressure compression chamber and the second and third of the vanes, the housing, and the driven shaft define a low pressure compression chamber.
Dependencies are inferred from the claim text.