US Patent No: 5,557,887

Number of patents in Portfolio can not be more than 2000

Yieldable gearing and safety mechanisms for garage door operators

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Importance

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Abstract

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A garage door operator which senses obstructions and takes corrective action before entrapment can occur. Yieldable gears are utilized as a failsafe mechanism such that when the applied torque exceeds certain limit, the gears disengage so that the garage door can be manually moved. The yieldable gears may also be disengaged by remote control or by hand. Solid state circuitry is provided to achieve soft starts and stops of the electric motor. Test circuitry is provided that tests the operational readiness of the electrical components by simulating an abnormal torque condition. During operation of the electric motor, the torque load is electronically calculated and if an abnormal torque load is encountered, the electric motor reverses direction.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FELLOWS; JERRY W.MARTINEZ, CA1

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Davis, Richard S San Diego, CA 17 266
Fellows, Jerry W 4950 John Muir Rd., Martinez, CA 94553 2 57
Sherlock, Thomas M Los Altos, CA 13 116

Cited Art Landscape

Patent Info (Count) # Cites Year
 
BBH, INC. (1)
4,553,652 Coupling mechanism 11 1983
 
C. & E. FEIN GMBH (1)
4,923,047 Machine with variable torque setting 6 1988
 
Chamnberlain Manufacturing Corporation (1)
4,472,910 Integral device for garage door opener 81 1982
 
CONAX FLORIDA CORPORATION (1)
4,680,537 Method and apparatus for testing a conductivity sensing circuit 12 1985
 
Effective Flow Ideas, Inc. (1)
4,832,184 Live roller conveyor apparatus 20 1987
 
Everest & Jennings Canadian Limited (1)
4,504,094 Drive mechanism for invalid carriages 10 1982
 
F.LLI CUCCHI S.R.L. (1)
4,667,789 Control device for feeding metal bars for supplying an automatic multi-spindle lathe 5 1985
 
Faiveley Entreprises (1)
4,605,108 Device for releasing a rotational-locking actuating member 16 1983
 
Firmaframe Nominees Pty. Ltd. (1)
4,342,354 Mechanism for stopping the drive or reversing the drive of motors of roller shutter doors 30 1980
 
Firmagroup Australia Pty. Ltd. (1)
4,706,727 Door operator 21 1985
 
GMI HOLDINGS, INC. (1)
5,384,495 Wiring error detector for door operator 11 1993
 
ITT CORPORATION (1)
5,105,131 Power drive system for sliding door 42 1990
 
IVG Australia Pty. Limited (1)
5,042,315 Gear mechanism 7 1989
 
JOHNSON CONTROLS TECHNOLOGY COMPANY (1)
5,246,095 Output torque sensor and control apparatus 2 1992
 
JOHNSON SERVICE COMPANY (1)
4,794,314 Environmental position actuator apparatus having load responsive limit control apparatus 18 1987
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
5,080,642 Rotation transmission device with a torque limiting transmission gear mechanism 7 1990
 
R & S WHOLESALE DOORS, INC. (1)
5,222,327 Side mount garage door operator 32 1991
 
SIEMENS AKTIENGESELLSCHAFT (1)
5,239,252 Method and apparatus for controlling single or multiphase A.C. power controllers 6 1990
 
Stanley Home Automation (1)
5,278,480 Door opener control with adaptive limits and method therefor 138 1992
 
Sundstrand Corporation (1)
5,040,643 Radial torque limiter 1 1990
 
The Chamberlain Group, Inc. (1)
4,653,565 Garage door opener 17 1985
 
UUSI, LLC (1)
5,334,876 Power window or panel controller 92 1992
 
Other [Check patent profile for assignment information] (5)
4,191,237 Garage door operator 37 1977
4,281,475 Apparatus for opening and closing a door 6 1979
4,428,252 Actuator device for opening a sliding door 2 1981
4,732,203 Sectional door with operator 14 1986
5,335,307 Precision electric motor speed 8 1993

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
HOMERUN HOLDINGS CORP. (20)
5,931,212 Motorized operator for doors 35 1997
5,929,580 System and related methods for detecting an obstruction in the path of a garage door controlled by an open-loop operator 63 1997
6,164,014 Cable control device for sectional overhead door 48 1998
6,401,792 Motorized operator for doors 30 1999
6,263,947 Cable control device for sectional overhead door 6 2000
6,561,255 Overhead door locking operator 11 2000
6,588,156 Sectional door operator alignment method 3 2001
6,845,804 Overhead door locking operator 5 2003
6,851,465 Overhead door locking operator 4 2003
6,880,609 Overhead door locking operator 6 2003
6,739,372 Overhead door locking operator 10 2003
7,397,342 Operating system for a motorized barrier operator with a radio frequency energized light kit and/or switch and methods for programming the same 4 2004
7,367,160 Door operator system 5 2004
7,143,804 Overhead door locking operator with remote light assembly 3 2005
7,061,197 Pivoting and barrier locking operator system 7 2005
7,282,883 Pivoting and barrier locking operator system 1 2006
7,717,155 Pivoting barrier operator system with integral cable storage drum and transfer assembly 0 2006
7,576,504 Pivoting and barrier locking operator system 0 2006
7,246,647 Overhead door locking operator 4 2006
7,607,263 Door operator system 2 2008
 
The Chamberlain Group, Inc. (6)
6,091,217 Safety gate operator which prevents entrapment, and method of its operation 26 1998
6,860,065 Remote release for a movable barrier arrangement 5 2002
6,995,533 Controlled torque drive for a barrier operator 1 2003
7,205,735 Barrier movement operator having obstruction detection 3 2004
7,610,030 Wireless transmit-only apparatus and method 0 2006
7,432,676 Barrier movement operator having obstruction detection 3 2006
 
OVERHEAD DOOR CORPORATION (2)
6,118,243 Door operator system 70 1999
6,442,897 Counterbalance system cable drum for sectional doors 7 2000
 
SMARTDOOR HOLDINGS, INC. (2)
6,484,784 Door controlling device 39 2000
6,945,303 Intruder, theft and vandalism deterrent management system for controlling a parking area 10 2002
 
WAYNE-DALTON CORP. (2)
6,253,824 Disconnect for powered sectional door 25 1999
6,326,751 System and related methods for detecting and measuring the operational parameters of a garage door utilizing a lift cable system 44 1999
 
WON-DOOR CORPORATION (2)
7,782,019 Method and apparatus for battery-backed power supply and battery charging 10 2009
8,493,033 Method and apparatus for battery-backed power supply and battery charging 0 2010
 
HORMANN KG ANTRIEBSTECHNIK (1)
7,007,427 Separating device for an overhead door 3 2002
 
Hydromach Inc. (1)
5,698,073 Automatic sectional door opener 51 1996
 
Kabushiki Kaisha Komatsu Seisakusho (1)
5,802,766 Method and apparatus for controlling automatic opening and closing of window of driver's cab of working vehicle 3 1996
 
REGAL BELOIT AMERICA, INC. (1)
7,271,560 Assembly for moving a barrier and method of controlling the same 0 2004
 
Other [Check patent profile for assignment information] (5)
5,937,578 Garage door safety sensor mounting assembly 4 1997
6,179,036 Automatic overhead door opening system with dual motor drive and automatic door lock 17 1999
8,375,635 Apparatus for opening and closing overhead sectional doors 0 2009
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