Bone cement injector gun

Details Bone cement injector gun Bone cement injector gun

1997-06-17

1999-04-13

Bomberg, Kenneth

Dispensing

With discharge assistant

Container with follower

222327, 604209, 606 94, 606 68, 606234, 741415, 74169, 74516, 74522, A67D 542

Patent

active

058934880

ABSTRACT:
A paste injector gun, especially adapted for injecting bone cement, has first and second mechanical advantages. In a first embodiment, the first and second mechanical advantages are produced by two fulcrums engageable during different portions of the trigger stroke. In a second embodiment, the first and second mechanical advantages are produced by a fixed fulcrum and a rotatable fulcrum. 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. An alternative embodiment provides a hinged cartridge retaining gate for closing the U-shaped slots for positive retention of the cartridge.

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