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Updated in 7/27/2019 4:50:56 AM      Viewed: 360 times      (Patent)

Bone cement injector gun

Michael E Hawkins , Stephen H Hoag , Kirt L Case , Kwan-Ho Chan , Zimmer, Inc.
ABSTRACT
A paste injector gun, especially adapted for injecting bone cement, has first and second mechanical advantages corresponding to different portions of the trigger stroke. The first mechanical advantage is greater than the second such that the first facilitates pressurizing the bone cement and the second facilitates high volume dispensing of the bone cement. The injector gun also includes a pair of U-shaped slots. One of the slots is sized to accept a large cement cartridge and the other slot is sized to accept a small cement cartridge.
Notes
Claims What is claimed is:1. A paste injector gun comprising:a trigger having a range of travel with first and second stages, the first stage being from an initial rest position to an intermediate position and the second stage being from the intermediate position to a subsequent position of further trigger travel;first pivot means for providing a first center of rotation for the trigger, the first pivot means being engaged during the first stage of travel, the first pivot means corresponding to a first...