Latch with preload indication

Details Latch with preload indication Latch with preload indication

1989-11-21

1991-04-30

Nicholson, Eric K.

Closure fasteners

Bolts

Hooked end

292DIG60, 7386239, E05C 500

Patent

active

050112007

ABSTRACT:
An improved latch with preload indicator for securing together a pair of hinged cowlings surrounding an aircraft engine. The latch comprises a hook which engages a keeper attached to one of the cowlings, a handle attached to the other cowling and mounted with the hook along a common pivot, and a hook-handle spreader spring with a free end that moves relative to and extends through the handle to provide indication of latch preload. The visual indication of the preload eliminates the need for maintenance personnel to measure the handle closing force during installation, rigging or maintenance of the cowlings.

REFERENCES:
patent: 1247249 (1917-11-01), Felcyn
patent: 2894777 (1959-07-01), Hogan
patent: 3347578 (1967-10-01), Sheenan et al.
patent: 3943882 (1976-03-01), Sollack et al.
patent: 4045063 (1977-08-01), Fletcher et al.
patent: 4053177 (1977-10-01), Stammreich et al.
patent: 4116479 (1978-09-01), Poe
patent: 4531769 (1985-07-01), Glancy
patent: 4538843 (1985-09-01), Harris
patent: 4557441 (1985-12-01), Aspinall
patent: 4784404 (1988-11-01), Kowatsch

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