Trap with reduced force opening means

Details Trap with reduced force opening means Trap with reduced force opening means

1983-09-14

1984-11-06

Schwadron, Martin P.

Valves and valve actuation

Valve head movably connected for accommodation to seat

With single plane swing pivoted connection

251298, F16K 2500

Patent

active

044808127

ABSTRACT:
A dust trap having an annular valve seat and a pivoted valve flap closing the same including an off-center connection between the actuating means for said pivoted flap and said flap thereby to lessen the force required to open the valve passageway against the force of vacuum.

REFERENCES:
patent: 1777580 (1930-10-01), Russell
patent: 2992655 (1961-07-01), Davis
patent: 3182951 (1965-05-01), Spencer
patent: 3257045 (1966-06-01), Carpentier
patent: 3307573 (1967-03-01), Epstein
patent: 3550904 (1970-12-01), Vawter
patent: 4121607 (1978-10-01), Bader
patent: 4307747 (1981-12-01), Carpentier
patent: 4308894 (1982-01-01), Carpentier

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