Motors: expansible chamber type – Working member position responsive motive fluid control – Exhaust control
Patent
1992-03-25
1993-02-23
Denion, Thomas E.
Motors: expansible chamber type
Working member position responsive motive fluid control
Exhaust control
91409, 92 85B, F15B 1522
Patent
active
051880164
ABSTRACT:
An improved cylinder structure for a pneumatically operated tool, which is characterized in the two air tight chambers defined at the front and rear ends of the cylinder so that the air confined therein can produce reaction pressure respectively to reduce the operation speed of the piston when it approaches the dead ends of the cylinder and further to bounce back the same in a rapid manner whereby the impact of the moving piston can be effectively reduced at the dead ends and the noise and vibration generated as a result of high speed impact on the ends of the cylinder can also be minimized; moreover, the piston can be protected from being deformed and damaged due to constant direct impacts.
REFERENCES:
patent: 3205787 (1965-09-01), Volkman
patent: 3805672 (1974-04-01), Pekrul
patent: 3834276 (1974-09-01), Gournelle
patent: 4397220 (1983-08-01), Russo et al.
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