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US 2006/0185507 A1Published application
Hydraulic breech mechanism for firearms
OwnerSimon Trendallinventor
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OwnerSimon Trendallinventor
Estimating the term…
A hydraulic breech mechanism uses a sealed reservoir of fluid to rigidly support the bolt 6 against barrel 2 resisting pressure generated by discharging a cartridge in chamber 3. Recoil forces cause the high pressure cylinder 7 and barrel assembly 2 and 4 to move relative to the sleeve valve 8 opening communication between reservoirs 9 and 11. This and subsequent bolt travel displace floating piston 12 compressing spring 13. During bolt opening any cartridge in chamber 3 will be ejected. With the firing load removed from the bolt 6 the floating piston 12 under influence of spring 13 will pump fluid into the high pressure reservoir 9, closing the bolt and chambering any round in the loading port. Continued load from spring 13 now returns the high pressure cylinder 7 and barrel assembly 2 and 4 to the original position relative to the sleeve valve locking bolt 6 ready for the next cycle.
A hydraulic breech mechanism comprising a low pressure reservoir for fluid having communication with a high pressure reservoir for fluid and a sealing means movable between a sealed position isolating the two reservoirs to allow the fluid sealed in the high pressure reservoir to rigidly lock the bolt or breech block in relation to the barrel and an open position permitting communication between the two reservoirs thus allowing the bolt or breech block to travel in relation to the barrel.
Dependencies are inferred from the claim text.