A pump chuck for connection with a valve stem of a tire valve is disclosed. The pump chuck comprises a body having a first bore, a second bore, a third bore and a passageway connecting the first bore and the third bore therethrough, a pivot clip pivotally mounted on the body and having a plurality of threads on one end and a depression on a bottom surface, a compression spring compressed between the pivot clip and the body, a pneumatic piston and a washer housed inside the first bore of the body, an end cap mounted on the top surface of the body above the first bore, and a connector housed inside the third bore of the body to connect a hose from a tire pump. The pneumatic piston utilizes air pressure from the tire pump to push the washer against the valve stem to affect an air tight seal.
Bike Tire Pump Chuck
2015-09-10
Patent
Electronic Resource
English