Patent ID: 8087639

Claim:
An oxygen tank key comprising: an elongated substantially thin flat handle portion defining a first plane and having first and second ends that define the length thereof, first and second side edges that define the width thereof and first and second planar faces that define the thickness thereof; a socket integrally formed with said handle portion and located intermediate said ends of said handle portion at approximately the midpoint of the length of said handle portion, said socket having, a thickness that is greater than the thickness of said handle portion and which extends the width of the handle portion; said socket including an aperture having an axis parallel to said first plane but perpendicular to the length of said handle portion, said aperture being open adjacent one of said side edges and having a depth extending into but not entirely through the width of said handle portion whereby the other of said side edges is closed, said aperture having a substantially rectangular cross-section and being adapted to fit onto the rectangularly shaped end of an oxygen tank valve control stem, and an elongated slot passing entirely through said handle portion in a direction perpendicular to said plane, said slot being elongated in the direction of the length of said handle portion and having first and second ends, said first end of said slot being chamfered at said first planar face of said handle portion and said second end of said slot being chamfered at said second planar face of said handle portion.