Crank mechanism for balloon inflation device

Abstract

Devices used to pressurize, depressurize, or otherwise displace fluid are disclosed. The devices may be configured to displace fluid in order to inflate or deflate a medical device, such as a balloon. The devices may further include a crank member for providing a mechanical advantage when pressurizing or otherwise displacing fluid.

1 . An inflation device assembly, comprising:
 a syringe body;   a plunger configured for advancement and retraction within the syringe body; and   a coupling member comprising coupling member threads configured to constrain movement of the plunger within the syringe body;   a handle coupled to a proximal portion of the plunger; and   a crank member coupled to the handle;   wherein the plunger comprises plunger threads configured to be selectively engaged and disengaged with the coupling member threads, wherein the plunger threads are configured to be retractable from the coupling member threads.