Motors: expansible chamber type – Constantly applied motive fluid with controlled venting – Cyclically operable
Patent
1976-04-14
1978-03-07
Maslousky, Paul E.
Motors: expansible chamber type
Constantly applied motive fluid with controlled venting
Cyclically operable
91235, 92 30, 92130C, 92130D, F01L 1500, F01B 718
Patent
active
040773035
ABSTRACT:
A mechanism for generating a high impact force for hammering, pounding, stamping, forging or similar operations. A piston is slidably mounted in a fluid pressure chamber, and has a larger cross sectional area at one end of the chamber than at the other end thereof. A fluid is introduced into the chamber under pressure, and exerts a net axial force on the large cross section end of the piston. One end of the piston outside the chamber forms a cam, which is engaged by a spring loaded cam follower to prevent axial movement of the piston until the force thereon exceeds a predetermined value. When the force on the piston exceeds said value, the cam is suddenly disengaged from its follower, permitting rapid movement of the piston under the fluid pressure. When the piston reaches the end of its travel, fluid is permitted to leave the chamber so that the pressure on the piston rapidly decreases, and the spring loaded cam follower acts on the cam to return the piston to its initial position.
REFERENCES:
patent: 1749924 (1930-03-01), Runge et al.
patent: 1801259 (1931-04-01), Barks
patent: 2251323 (1941-08-01), Burke
patent: 2261925 (1941-11-01), Salzer
patent: 2389405 (1945-11-01), Birchfield
patent: 2678538 (1954-05-01), Cowan
patent: 2933069 (1960-04-01), Grotzmuller
patent: 3007454 (1961-11-01), Joelson
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