Braking system for high acceleration operated free pistons |
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| 申请号 | US3762279D | 申请日 | 1972-03-13 | 公开(公告)号 | US3762279A | 公开(公告)日 | 1973-10-02 |
| 申请人 | MESSERSCHMITT BOELKOW BLOHM; | 发明人 | ZEYHER F; | ||||
| 摘要 | A braking system for high acceleration operated free pistons comprises a cylinder having one end with an inturned flange which provides a stop or abutment for a deformable shell in the form of a cylinder which is opened at each end. The piston, which is freely movable in the cylinder in a direction toward the shell is provided with a concave face on the side facing toward the shell and with a rim which engages behind an inwardly turned rim of the braking shell. The shell is deformed inwardly into the concave recess of the forward end of the free piston upon the impact of the piston against the shell and the deformation of the shell provides a shock absorption for the impact of the piston. | ||||||
| 权利要求 | 1. A deceleration system for high acceleration operated free pistons, comprising a cylinder, a free piston movable in said cylinder, a collar formed on said cylinder adjacent one end, a disposable brake shell of a plastically deformable material located within said cylinder and secured against ejection by said collar, said piston having a piston base facing toward said brake shell with a concave indentation, said shell having an end engageable within said concave indentation of said piston base and being deformable inwardly within said base upon impact of said piston against said shell to absorb the impact shock. 2. A deceleration system, according to claim 1, wherein said brake shell is provided with a chamfered rim forming a wedge-shaped annular slot between said rim and said cylinder. 3. A deceleration deceleration system for high acceleration operated free pistons, comprising a cylinder, a free piston movable in said cylinder, a collar formed on said cylinder adjacent one end, a brake shell of deformable plastic material located within said cylinder and secured against ejection by said collar, said piston having a piston base facing toward said brake shell with a concave indentation, said shell having an end engageable within said concave indentation of said piston base and being deformable within said base upon impact of said piston against said shell to absorb the impact shock, said brake shell being provided with a chamfered rim forming a wedge-shaped annular slot between said rim and said cylinder, said brake shell also having weakened areas to cause the walls thereof to collapse and move around the surface of the concave end portion of said piston. 4. A deceleration system for a recoilless weapon, comprising a cylinder, a free piston movable in said cylinder, and a plastically deformable and disposable brake shell secured against movement beyond a fixed locatiOn within said cylinder located in the path of travel of said piston, said piston having an end facing said shell with a concentric concave recess extending substantially over its whole cross section, said shell having a peripheral portion facing said piston of a size to engage within the recess of said piston when it is moved toward said brake shell so as to be deformed inwardly by the curvature of the piston recess by the impact of the piston thereagainst to collapse its wall inwardly and to cause its plastic deformation while it stops the movement of said piston. |
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