Mechanically timed mixing faucet for aircraft lavatories and the

Details Mechanically timed mixing faucet for aircraft lavatories and the Mechanically timed mixing faucet for aircraft lavatories and the

1987-05-22

1988-05-24

Cohan, Alan

Fluid handling

Systems

Programmer or timer

74405, 744115, F16K 3100

Patent

active

047459492

ABSTRACT:
A faucet assembly comprising a movable handle, an axially adjustable mixing valve operated by the handle, and a timer assembly. The timer assembly is entirely mechanical and comprises a drive gear, an actuator arm coupling the drive gear to the handle, a timer gear journalled coaxially with the drive gear, fixed check gear coaxial with the drive gear, and a latch. The latch is carried transversely on the drive gear, and terminates at either end in first and second latch arms extending opposite to each other substantially parallel to the drive gear. The first latch arm mechanically latches the drive gear to the timer gear when the handle is depressed toward the open position. The second latch arm latches the drive gear to the fixed check gear when the handle reaches the open position. The timer counterrotates the timer gear at a given rate after the timer gear and the drive gear are unlatched. A hook extending outwardly from the timer gear reengages the first latch arm with the timer gear after the timer gear has been counterrotated by the timer. A valve spring in the mixing valve biases the handle and the drive gear coupled thereto toward the closed position, so that when the drive gear is unlatched from the check gear the handle returns to the closed position.

REFERENCES:
patent: 1445871 (1923-02-01), Davis
patent: 1468949 (1923-09-01), Koch
patent: 1747117 (1923-11-01), Meyer
patent: 2115689 (1938-04-01), Morrison
patent: 2545928 (1951-03-01), Martin
patent: 2996082 (1961-08-01), Miner
patent: 3026907 (1962-03-01), Klingler
patent: 3351095 (1967-11-01), Harvey et al.
patent: 3385324 (1968-05-01), Wolf et al.
patent: 3893481 (1975-07-01), Watts
patent: 4040446 (1977-08-01), Watts
patent: 4286623 (1981-06-01), Spanides

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