Cement pressurizing device
OwnerByron L. Browninventor
Life of this patent
Estimating the term…
Abstract
Apparatus and method for forcing flowable cement out of a container into a bone cavity under pressure for binding a prosthesis in the bone cavity with minimal bubbles and voids. The apparatus includes a first pressurization device such as a ratchet gun for forcing the flowable cement from a container of cement into the bone cavity in first increments. A second pressurization device then forces the flowable cement out of the container into the bone cavity in second increments smaller than the first increments to control the pressure in the bone cavity by causing it to increase in smaller increments than with the first pressurization device.
Claims20
A ratchet gun for forcing flowable cement out of a container having a moveable piston into a bone cavity under pressure, the ratchet gun comprising:
- a first pressurization device including a plunger rod having a first and second end, said first end for bearing against the piston of said container and forcing said flowable cement from said container into said bone cavity in first increments;
- and
- a second pressurization device for bearing against said second end of said plunger rod to move said plunger rod and said piston of said container so as to force said flowable cement out of said container into said bone cavity in second increments smaller than said first increments to control the pressure in said bone cavity by causing it to increase in smaller increments than with said first pressurization device.
An attachment for a ratchet gun having a movable plunger rod that moves a piston within a container of bone cement so as to pressurize bone cement in a bone cavity, said plunger rod extending between first and second ends, the first end of said plunger rod for engaging said piston within said container of cement, a pivotal handle engaging said plunger rod for moving said piston within said container in first increments to force said cement out of said container into said bone cavity under pressure, said attachment for bearing against said second end of said plunger rod to move said plunger rod and said piston within said container in second increments smaller than said first increments so as to enable a user to apply cement under pressure to said bone cavity in smaller units of pressure than with said pivotal handle.
Dependencies are inferred from the claim text.