Movable grating control
First Claim
1. A stationary and movable grating, drive means moving said movable grating between OPEN and CLOSED positions relative to said stationary grating,said drive means connected to drive said movable grating toward CLOSED position through a yieldable connection, said drive means connected to directly drive said movable grating toward OPEN position, wherein said drive means is connected, before driving said movable grating toward OPEN position, to remove any slack in the system due to yielding in movement toward CLOSED position.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
16 Claims
-
1. A stationary and movable grating, drive means moving said movable grating between OPEN and CLOSED positions relative to said stationary grating,
said drive means connected to drive said movable grating toward CLOSED position through a yieldable connection, said drive means connected to directly drive said movable grating toward OPEN position, wherein said drive means is connected, before driving said movable grating toward OPEN position, to remove any slack in the system due to yielding in movement toward CLOSED position.
-
4. Room air grating assembly comprising:
-
a first stationary grating, a second grating movable between OPEN and CLOSED positions, drive means connected to drive said second grating from OPEN toward CLOSED position through a yieldable connection, said drive means connected to directly drive said second grating during travel from CLOSED to OPEN position, wherein said drive means will move slack in the drive toward OPEN position before directly driving said second grating. - View Dependent Claims (5, 6, 7, 8)
-
-
9. Room air grating assembly comprising:
-
a first stationary grating, a second grating movable between OPEN and CLOSED positions relative to said first grating, drive means moveable with an attachment adapted to contact an attachment on said second grating to yieldably move the latter toward CLOSED position, wherein said drive means on movement in an OPEN direction causes said second grating to move toward OPEN position after removing any slack due to an earlier yielding. - View Dependent Claims (10)
-
-
14. A grating system, comprising:
-
a stationary grating;
a movable grating;
a drive connected to drive said movable grating toward a closed position through a yieldable connection such that said yieldable connection may yield during movement toward said closed position thereby creating slack;
said drive connected to directly drive said movable grating toward said open position after first removing any said slack. - View Dependent Claims (15, 16)
-
Specification