Patent ID: 8393205

Claim:
A system for inflation and pressure measurement with over pressure protection, the system comprising: a valve body comprising: a sidewall and bottom defining an internal cavity with an opening and a central axis, a gauge port passing through the valve body sidewall, and an operating port passing through the valve body sidewall; a pressure gauge in gaseous communication with the gauge port; a plunger, aligned for axial movement within the valve body between an first and a second position, the plunger having sidewalls surrounding a hollow center and further comprising: an inflation valve passing through a plunger sidewall, a locating groove within a plunger sidewall and adjacent to the valve body sidewall, a first pathway passing through a plunger sidewall and providing gaseous communication between the inflation valve and the operating port when the plunger is in the first position, and a second air pathway providing gaseous communication between the operating port and the gauge port when the plunger is in the second position; a compression spring between the valve body and the plunger; and a locating structure passing through the valve body sidewall and contacting the locating groove of the plunger, limiting the axial movement of the plunger in the first and second positions.