Safety inlet air valve control arrangement for air powered hand

Details Safety inlet air valve control arrangement for air powered hand Safety inlet air valve control arrangement for air powered hand

1975-02-06

1976-07-20

Cline, William R.

Fluid handling

Systems

Flow path with serial valves and/or closures

173169, 13761419, 1376372, F16K 1110

Patent

active

039701107

ABSTRACT:
Safety air valve control arrangement for feeding inlet air to the motor of a rotary hand held tool, such as an impact wrench, and guarding against accidental feeding of such air, as when the tool is carelessly rested or dropped, the control arrangement comprising a manipulative lever operated throttle valve and a manipulative trigger operable safety valve both of which must be separately manually operated and held at the same time in operated condition to enable inlet air feed to the motor. Release of either valve to closed condition will shut off operation of the tool.

REFERENCES:
patent: 710508 (1902-10-01), Ott
patent: 979024 (1910-12-01), Moore
patent: 1068605 (1913-07-01), Robertson
patent: 1417136 (1922-05-01), Burkel
patent: 2362608 (1944-11-01), Allen
patent: 2612141 (1952-09-01), Freedman et al.
patent: 2796888 (1957-06-01), Pape et al.
patent: 2939675 (1960-06-01), Warden

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