Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Activation of one path disables second path
Patent
1975-09-18
1977-03-29
Maslousky, Paul E.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
Activation of one path disables second path
91234, 92136, 92184, 51170TL, F01L 2102
Patent
active
040142493
ABSTRACT:
A fluid actuated, valveless sanding tool is disclosed which comprises a housing containing a cylinder, a double-ended piston mounted for reciprocal movement within the cylinder, a mounting plate to which an abrasive tool can be attached, and a double rack and pinion connecting means reciprocally driving the mounting plate. A fluid supply system delivers pressurized fluid to a central portion of the bore and a vent system permits venting of the ends of the cylinder. The piston has two end seals and three internal, main seals which maintain a fluid tight relationship with the inner cylinder wall. Two internal passages in the piston are in communication with the annular areas between the three main seals and the respective ends of the piston. The end seals alternately cover the corresponding vents for the cylinder ends thereby permitting the piston to be reciprocally driven by the pressurized fluid which has been alternately delivered from the fluid supply system at the central portion of the cylinder to the other respective end portions of the cylinder through the internal passages in the piston itself. Hence the reciprocating piston serves as its own pressurized fluid directing valve.
REFERENCES:
patent: 841162 (1907-01-01), Lewis
patent: 1940388 (1933-12-01), Callahan
patent: 2610098 (1952-09-01), Reiners
patent: 2797664 (1957-07-01), Swanson
patent: 3606930 (1971-09-01), Curington
patent: 3713365 (1973-01-01), Goodrich
patent: 3803773 (1974-04-01), Pdowara
patent: 3838741 (1971-10-01), Pepe
Florida Pneumatic Manufacturing Corporation
Maslousky Paul E.
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