Abstract: Forward and reverse rotary tool, particularly for inserting and retracting a threaded element. The power-driven tool is designed primarily for surgical use and is capable of applying pressure against the free end of the threaded element during both the inserting and retracting operation, as into a bone. The shift from a driving mode to a retracting mode, or vice versa, is readily effected under conditions existing in an operating room. All movable and/or lubricated parts, other than the driven element, are housed to prevent leakage of lubricant. The tool comprises a unidirectionally driven pinion in constant engagement with a pair of counter-rotating clutch elements and means alternatively engageable with said clutch elements for rotative driving in one direction or the opposite direction.

Abstract: The transport for a cadaver has an undercarriage with four wheels arranged to define a rectangle. A pair of upright columns are mounted upon the undercarriage near opposite ends thereof and are connected at their upper ends to a frame which is preferably rectangular and elongated. The upright columns may include fluid pressure actuated cylinders which extend between the frame and the undercarriage. A canopy support is comprised of a pair of flat support members engageable at one edge of each to define a flat canopy support, each support member having a pair of legs rigidly secured at one end of each to the support member and pivotally connected at the other end of each to the frame whereby the support members can be pivoted between horizontal coplanar positions of engagement with each other and substantially upright positions at the opposite ends of the frame.

Abstract: Chuck for a gear reduction surgical rotary driver. There is provided for a controlled speed surgical driver an automatically releasable chuck for grasping tools of a very small diameter such as the wire used in bone pinning. In a driver having a conventional high-speed drive motor and speed reduction means, there is provided a frustro conical ramp, of generally circular cross section, and diverging outwardly toward the working end of the tool. A wire carrier is arranged for longitudinal sliding movement in the end of said tool and having a portion thereof projecting beyond said tool. Said wire carrier receives the wire centrally therethrough and carries three gripping devices which act between the wire and said ramp. Two of said gripping devices are preferably of ball shape and the third thereof is of generally disk shape with a rounded periphery whereby to project between said balls and engage a wire or other tool of small diameter.