Abstract: A propane tank with a valve passage containing a valve has a protection cap with a projecting pin which extends into the passage adjacent the valve to provide a secondary seal. The projecting pin is defined by an annular sleeve surrounding a hollow interior extending up to the upper wall where the sleeve has an outside surface tapered from the upper wall to the remote end and an inside surface tapered from the remote end to the upper wall and the passage carries an O-ring seal arranged so that movement of the upper wall in a direction away from the passage caused by pressure release is insufficient to cause release of the secondary seal between the projecting pin member from the O-ring seal. The projecting element extends into the hollow interior to a position beyond the remote end of an actuating pin of the valve.

Abstract: A propane tank of less than 4 pounds includes a tank body with a collar welded in an opening and a cylindrical valve receptacle threaded into a female screw thread in the collar with a valve body in a central passage. A protection cap has an upper wall and a peripheral wall which engages onto the outside of the collar and is spaced outwardly of the valve receptacle so as to define a crush area to receive impact loads. The upper wall includes a ring which extends into and engages a wider section of the passage and a projecting pin which extends into and engages into the passage adjacent the valve body to provide an additional seal. The peripheral wall defines a female thread on a plurality of displaceable sections so that the cap can be pushed axially on to a male screw thread on the collar and unscrewed.

Abstract: A propane tank of less than 4 pounds includes a tank body with a collar welded in an opening and a cylindrical valve receptacle threaded into a female screw thread in the collar with a valve body in a central passage. A protection cap has an upper wall and a peripheral wall which engages onto the outside of the collar and is spaced outwardly of the valve receptacle so as to define a crush area to receive impact loads. The upper wall includes a ring which extends into and engages a wider section of the passage and a projecting pin which extends into and engages into the passage adjacent the valve body to provide an additional seal. The peripheral wall defines a female thread on a plurality of displaceable sections so that the cap can be pushed axially on to a male screw thread on the collar and unscrewed.