Movable grating control

Details Movable grating control Movable grating control

2005-09-20

2005-09-20

Boles, Derek S. (Department: 3749)

Ventilation

Having inlet airway

Including specific air distributor

C454S334000

Reexamination Certificate

active

06945867

ABSTRACT:
A grating assembly drive means is connected to control the movement of the movable grating between OPEN and CLOSED positions relative to a fixed grating. The drive means moves the movable grating through yieldable connection when moving toward CLOSED position, whereby when such movement is blocked by a foreign object the movable grating stops without damaging the object or the drive. On the other hand movement by the drive means toward OPEN position is direct after removal of any slack caused by a previous yielding.

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patent: 2295891 (2003-07-01), None

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