Swivel assembly

Claim 1

A swivel assembly for a fire extinguisher consisting essentially of: a fire extinguisher valve body; a bore through said body, said bore including an enlarged first end portion through which fire extinguishing material may pass, and a lesser diameter opposite threaded second end portion; a swivel block including a through bore defining an inner inlet passage, and an outlet passage in fluid communication therewith and disposed at an angle to the axis of said inlet passage, said swivel block through bore further defining a reduced diameter outer portion; a bolt having a head and a shank portion extending inwardly freely coaxially through said swivel block through bore and said valve body bore first end portion and threaded in said body threaded second end portion to secure said swivel block to said fire extinguisher valve body accurately fixedly coaxially of said valve body bore first end portion with said swivel block inlet passage aligned with said valve body bore, said bolt having an annular clearance with said swivel block in said outer portion of the bore thereof; a sealing ring interposed between said bolt head and said swivel block for precluding the passage of fire extinguishing material outwardly through said outer portion of the swivel block bore; a bearing seal ring interposed between said swivel block and said valve body coaxially of said valve body and swivel block bores for precluding the passage of fire extinguishing material between said swivel block and said valve body and positioning said swivel block with itS through bore maintained accurately coaxially of said valve body bore to define means for maintaining said swivel block coaxially aligned with said body bore; and means for selectively locking the bolt with the bolt head urged sealingly against said sealing ring to urge said sealing ring sealingly against said swivel block, said swivel block sealing against said bearing seal ring, and said bearing seal ring sealingly against said valve body with a preselected force for effecting said sealing of said bores while permitting ready swivelling of said swivel block about the valve body bore axis.