US Patent No: 5,576,581

Number of patents in Portfolio can not be more than 2000

Door control system and release mechanism

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Importance

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Abstract

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Fire control systems and release mechanisms. The release mechanisms of the present invention comprise a digital logic circuit for processing signals which are indicative of a condition in an outside environment, and for providing a trigger that will actuate the mechanical release mechanism in response to the condition, a power circuit for providing regulated power to the electronic circuit in response to the input power, the regulated power being used to operate the digital logic circuit, and a power backup circuit interfaced to the power circuit for providing the regulated power for a predetermined time in the event of an input power failure so that the digital logic circuit can be operated for the predetermined time during the input power failure.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SOLID STATE COMPUTERS, INC.HAZLETON, PA1
SOLID STATE SECURITIES, INC.HAZLETON, PA3

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Iannuzzi, Nelson A 96 S. Cedar St., Hazleton, PA 18201 2 32
Mehalshick, George M Hazleton, PA 5 48

Cited Art Landscape

Patent Info (Count) # Cites Year
 
CORNELL IRON WORKS, INC. (1)
4,386,645 Side folding closure 27 1981
 
National Environmental Products, Ltd. (1)
5,278,454 Emergency capacitive energy source and circuit for damper motors and actuator motors 23 1992
 
The Cookson Company (1)
5,082,316 Release mechanism and method with alarm circuit 74 1990
 
Other [Check patent profile for assignment information] (1)
5,272,385 Photographic and X-ray film protection system 1 1990

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
OVERHEAD DOOR CORPORATION (4)
7,299,847 Fire door control system and method 7 2003
6,924,730 Fire door control system and method including periodic system testing 1 2003
8,397,787 Door release mechanism 2 2010
8,770,255 Door release mechanisim 0 2011
 
RITE-HITE HOLDING CORPORATION (4)
5,743,317 Impact detection system for industrial doors 18 1996
6,612,357 Impact detection system for industrial doors 9 1998
6,598,648 Industrial door system responsive to an impact 10 1999
6,964,289 Industrial door system responsive to an impact 8 2003
 
SMARTDOOR HOLDINGS, INC. (2)
6,484,784 Door controlling device 38 2000
6,945,303 Intruder, theft and vandalism deterrent management system for controlling a parking area 10 2002
 
TD IP HOLDCO, LLC (2)
6,259,352 Door lock system 38 1998
6,049,287 Door with integrated smoke detector and hold open 23 1998
 
The Chamberlain Group, Inc. (2)
6,014,307 Fire door operator having an integrated electronically controlled descent device 40 1998
7,138,912 Movable barrier operations method and apparatus 18 2003
 
CIW ENTERPRISES, INC. (1)
8,651,164 Method for vertical acting egress and fire/smoke protection 0 2011
 
IRA J. ALLIGOOD (1)
5,983,971 Reinforced burglar- and storm-resistant cover for windows and doors 3 1997
 
Other [Check patent profile for assignment information] (5)
5,850,865 Rolling fire door with delayed closing mechanism 11 1997
6,100,655 Mechanical return fail-safe actuator for damper, valve, elevator or other positioning device 14 1999
7,574,826 Emergency door opening actuator 2 2005
8,825,535 Management and control system for a designated functional space having at least one portal 0 2011
8,831,970 Virtual attendant system and parking management system 0 2012