Liquid tire sealant injection tool

A liquid tire sealant injection and/or tire balancing tool primarily used with pneumatic tube or tubeless tires having a threaded valve stem port provided with a removable threaded Schrader type valve core, comprising:

• a body member having a vented elongated chamber having an opening at one end for sealed communication with said threaded valve stem port and having a vented chamber wall opposite said opening, said body member having a laterally extending port for communication with an injection line, and an operating shaft extending through and guided by said vented chamber wall opposite said opening, said operating shaft having a Schrader type valve core grappling means including a bifurcated end located within said chamber at its inner end, a movable chamber sealing means taking the form of an "O" ring to center and support said operating shaft, and a control means located outside of said chamber, said grappling means being rotatably and axially shiftable within said chamber in response to said control means and having said bifurcated end thereof received over said Schrader type valve core to frictionally retain said core to effect unthreading of said valve core on rotation, and withdrawal of said valve core in response to axial motion of said control means to a position within said chamber between said laterally extending port and said vented chamber wall opposite said opening where it does not restrict the flow passage between said ports during the injection of liquid tire sealant and/or balancing fluid, said grappling means being also shiftable within said chamber in response to said control means to rethread and tighten said valve core within said threaded port after an injection operation has been completed.