Mounting means for door-check for torsionally balanced hatchway

Details Mounting means for door-check for torsionally balanced hatchway Mounting means for door-check for torsionally balanced hatchway

1977-07-13

1978-08-08

Feldbaum, Ronald

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Closure checks

Pneumatic

16 51, E05F 300, E05F 510

Patent

active

041047613

ABSTRACT:
Mounting means for a door-check for a hatchway door hinged to swing between an elevated open position and a closed position and having torsion bars which serve not only as springs for counterbalancing the weight of the door, but also as the hinge pins for the door. Each torsion bar has a terminal portion which is bent backwardly into parallel relation with a straight portion, the terminal portion extending through the hinge and forming the hinge pin. The straight portion is secured at its other end to the hatchway frame and is twisted about the terminal portion by the hinge as the door is closed. The door-check member is mounted on the hatchway frame and is connected to a bracket mounted across the crook formed in the torsion bar where the terminal portion bends backward. The bracket therefore pivots about the hinge pin with the main portion of the torsion bar when the door is closed and provides a crank arm for actuating the door-check.

REFERENCES:
patent: 3058146 (1962-10-01), Harrison
patent: 3067453 (1962-12-01), Lyons

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