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US 6,886,620 B2Granted
Security bar assembly
OwnerMoshe Cohen-Ravid, John A. Laneinventors
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OwnerMoshe Cohen-Ravid, John A. Laneinventors
Estimating the term…
A security bar assembly has a plurality of bars that extend across an opening and have ends joined to drive chains. The bars may extend between two channels positioned on opposite faces of the opening, and may be slidable within the channels. The ends of the bars may be retained in the channels and the ends may have connections to chain links in opposing drive chains which are spaced apart a predetermined number of links to keep the bars a predetermined distance apart. A drive mechanism may be provided for moving the drive chains to slide the bars in the channels and a storage area adjacent the opening associated with the channels to retain the bars when they are not in place over the opening. The channels may each enclose a drive mechanism for independently moving the bar ends in each channel. In such embodiments, the drive mechanisms in the channels may be independently driven respectively by first and second motors. The first and second motors may be synchronized by a non-mechanical communication link. Transfer mechanisms are provided for moving the security bars between a stored position and a position in which the bars engage the bar drive chain.
A security bar assembly for an opening, comprising a plurality of bars extending between first and second channels, the first and second channels being positioned one on each of a first and second opposing side of the opening, the bars having bar ends connected to transport mechanisms for movement in each channel, wherein the channels each comprise a drive mechanism for independently driving each transport mechanism for moving the bar ends in each channel, and the drive mechanism in each of the first and second channels is independently driven respectively by first and second motors, and wherein the first and second motors are synchronised by a non-mechanical communication link.
A transfer mechanism for a security bar assembly, wherein the security bar assembly comprises security bars driven by a bar drive chain, wherein the transfer mechanism comprises cam-like side plates on the bar drive chain, and at least one of the cam-like side plates are adapted to engage a security bar.
A security bar assembly for an opening, comprising a plurality of bars extending between first and second channels, the first and second channels being positioned one on each of a first and second opposing side of the opening, the bars having bar ends connected to transport mechanisms for movement in each channel, further comprising a storage area for storing bars that are not in place over the opening, and a transfer mechanism for moving the bars from the storage area into engagement with the transport mechanisms, wherein the transfer mechanism comprises a cam supporting the bar ends and having a recess adapted for accommodating a bar end to feed the bar end on to the transport mechanisms.
Dependencies are inferred from the claim text.