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US 5,327,928 AGranted
Air seal valve
AssigneeSalem Engelhard
InventorBrian D. Thomason
Life of this patent
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Abstract
An air seal valve comprises an annular valve body having a circular valve plate disposed internally thereof with a pair of axially spaced valves thereon defining a fresh air plenum, one of said valves comprising a truncated conical plate having a radially outer edge engageable with the valve body to effect a seal thereagainst.
Claims2
An air seal valve comprising:
- a right circular cylindrical valve body;
- a rotatable support shaft extending diametrically of said valve body;
- a circular valve blade on said shaft;
- an annular primary valve seat on a radially inner surface of said valve body having a radially extending seating face;
- an annular primary valve face on said valve blade engageable with the radially extending seating face on said primary valve seat;
- a cylindrical secondary valve seat on the radially inner surface of said valve body axially spaced from said primary valve seat and having a cylindrical secondary seating face;
- a secondary valve on said valve blade axially spaced from said primary valve and of annular truncated conical configuration having a circular radially outer seating edge engageable with the cylindrical secondary seating face on said secondary valve seat;
- a fresh air plenum disposed between said primary and secondary valve seats;
- and
- means for conducting fresh air under pressure to said plenum.
7 more elements
Dependencies are inferred from the claim text.