Dispensing – Gas or vapor dispensing – With cutter or punch
Patent
1977-11-14
1979-11-13
Spar, Robert J.
Dispensing
Gas or vapor dispensing
With cutter or punch
73182, 73212, 222148, B67B 724
Patent
active
041740491
ABSTRACT:
A spool valve includes a disposable, replaceable cylinder containing gaseous media under pressure which is selectively introduced into the pitot and static lines of an aircraft for purging same incident to the endwise movement of a normally retracted plunger which comprises the valving member of the valve. The plunger, when in an inoperative position, maintains certain instruments in open communication with the pitot tube and outside static lines of an aircraft. When the plunger is advanced to an operative position, the aforesaid connections between the instruments, pitot tube, and outside static lines are closed, whereupon the gaseous media under pressure is introduced into the lines leading to the pitot tube and outside static air line for thereby purging said lines, and simultaneously therewith the instruments are automatically connected to an auxiliary pitot tube and auxiliary outside static lines. If the gas thus introduced under pressure fails to completely purge the lines, the plunger is adapted to be maintained in its fully advanced position by a continuously energized solenoid for enabling the pilot of the aircraft to utilize the auxiliary equipment.
REFERENCES:
patent: 3059814 (1962-10-01), Poncel et al.
patent: 3326231 (1967-06-01), Hogg
patent: 3327530 (1967-06-01), Lepird
patent: 3380298 (1968-04-01), Hanson
patent: 3879771 (1975-04-01), Nakane
patent: 4083187 (1978-04-01), Nagashima
Sawyer John
Silverberg Fred A.
Spar Robert J.
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