| 摘要 |
Pneumatic surgical motor having a housing (30), a sleeve (40) substantially coextensive and contiguous with said housing (30) surrounding said housing (30) defining a handle, said housing having a plurality of serrations formed on the periphery thereof and extending axially and defining a handle for the operator, the apex of the serrations engaging the inner surface of said housing (30) and the valley portion defining an air gap acting as an insulator for said sleeve (40), a vane motor (53) including a spindle (1) supporting four vanes and a cylinder (3) and being rotatably supported in said cylinder (3), said spindle (1) having a fore stub shaft (61) and an aft stub shaft (63) being supported by bearings (5), an attachment mechanism (52) affixed to said housing (30) for receiving surgical tools being powered by said vane motor (53), passageways (58,62) in said housing (30) for leading pressurized air into said housing (30) and into said vane motor (53) for rotating said spindle (1), and discharge aperture (55) in said vane motor (53) for leading spent air out of said housing (30), and a portion of said air passing over said bearings (5) for cooling said bearings (5) before being admitted into said vane motor (53). |
