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Room grating

  • US 6,340,329 B1
  • Filed: 09/12/2000
  • Issued: 01/22/2002
  • Est. Priority Date: 01/13/2000
  • Status: Expired due to Fees
First Claim
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1. Room air grating comprising:

  • first stationary grid, a second grid movable between OPEN and CLOSED positions, a motor operable to move said second grid between said positions, a resilient yieldable connection between said motor and said grid, whereby resistance to screen grid movement causes yielding of said connection.

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