US Patent No: 7,854,423
Number of patents in Portfolio can not be more than 2000
Modular lift assembly
Stats
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Dec 21, 2010
Issued date -
Aug 8, 2008
filing date -
12/189,002
serial no -
In Force
status
Importance
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Abstract
A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to one or more portions of the frame. A plurality of head blocks can be connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up can maintain a predetermined fleet angle between a take off point from the drum and the head block.
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First Claim
Related Publications
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International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,988,716 Modular lift assembly | 14 | 2002 | |
| 6,889,958 Brake for hoist assembly | 23 | 2003 | |
| 6,997,442 Safety sensor for a lift assembly | 12 | 2004 | |
| 2005/0247,919 Intermediate brake for modular lift assembly | 9 | 2005 | |
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| 5,351,937 Hoist and traction machine with free rotation control | 7 | 1992 | |
| 5,586,751 Manual chain block | 5 | 1994 | |
| 5,570,872 Free-rotation control apparatus of hoist and traction machine | 5 | 1994 | |
| 6,007,054 Hand operated chain block having an improved cover | 7 | 1998 | |
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| 5,492,306 Air balance hoist with load position indicator | 9 | 1994 | |
| 5,553,832 Safety device for an air balancing hoist | 15 | 1994 | |
| 5,593,138 Air balancing hoist combination | 7 | 1995 | |
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| 2004/0098,944 Batten for lift assembly | 9 | 2003 | |
| 2004/0099,852 Modular lift assembly | 9 | 2003 | |
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| 5,865,426 Human power amplifier for vertical maneuvers | 36 | 1996 | |
| 6,554,252 Device and method for wireless lifting assist devices | 17 | 2002 | |
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| 6,634,622 Modular lift assembly | 15 | 2000 | |
| 6,691,986 Modular lift assembly | 14 | 2002 | |
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| 5,074,528 Redundant crane reeving apparatus | 11 | 1989 | |
| 5,141,085 Hoist load brake | 20 | 1990 | |
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| 4,772,923 Automatically operated vacuum feed and hold down assembly for camera system | 6 | 1987 | |
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| 6,729,605 Cable winch hoisting device for stages | 4 | 2002 | |
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| 4,251,059 Apparatus for determining the reeving of a pulley system | 16 | 1979 | |
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| 7,210,670 Drawworks apparatus | 10 | 2004 | |
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| 5,106,057 Stage set lift apparatus | 14 | 1990 | |
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| 5,794,400 Composite frame member | 17 | 1996 | |
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| 6,807,790 Ring beam/lintel system | 7 | 2002 | |
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| 7,284,744 Lifting device | 12 | 2006 | |
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| 5,772,360 Topless watercraft lifting apparatus with a differential gearing system | 30 | 1997 | |
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| 5,848,781 Balancing hoist braking system | 16 | 1997 | |
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| 5,263,660 Anti-two block device | 10 | 1990 | |
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| 7,562,863 Theater rigging system | 4 | 2005 | |
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| 6,023,862 Control system for rope bucket | 11 | 1998 | |
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| 6,155,538 Winch | 5 | 1999 | |
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| 4,532,739 Roof ridge capping system | 10 | 1982 | |
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| 5,003,732 Roof verge system | 5 | 1989 | |
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| 6,118,652 Implantable medical device having flat electrolytic capacitor with laser welded cover | 40 | 1998 | |
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| 6,080,981 Apparatus for controlling the operation of a door movable in a door opening to prevent contact between the door and an obstruction in the door opening | 22 | 1998 | |
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| 4,802,787 Electrical control system | 10 | 1987 | |
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| 6,634,621 Lifting device and a method for lifting by using the same | 8 | 2001 | |
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| 6,364,062 Linear tracking mechanism for elevator rope | 13 | 1999 | |
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| 4,606,527 Theatre scenery hoisting mechanism | 18 | 1984 | |
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| 4,905,849 Overhoist prevention system | 10 | 1989 | |
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| 4,204,153 Method of determining the open circuit voltage of a battery in a closed circuit | 9 | 1978 | |
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| 5,661,945 Universal beam for movable load | 8 | 1996 | |
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| 5,662,311 Lifting apparatus including overload sensing device | 16 | 1996 | |
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| 5,190,250 Autonomous, heliborne-mobile construction/emergency pod system | 13 | 1991 | |
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| 6,517,054 Lever hoist with overload preventing device | 6 | 2001 | |
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| 4,324,386 Battens system for raising and lowering sceneries or similar loads on a stage | 22 | 1980 | |
| 4,446,587 Patient positioning device | 22 | 1981 | |
| 4,438,903 Obstacle detector for a descending or ascending load | 10 | 1982 | |
| 4,662,628 Device for maneuvering scenery | 23 | 1985 | |
| 4,624,386 Easy opening can top | 9 | 1985 | |
| 5,031,574 Control system for poultry house ventilation curtains | 22 | 1990 | |
| 5,361,565 Elevating system | 33 | 1993 | |
| 5,555,695 Extrusions providing for low deformability | 17 | 1993 | |
| 5,678,805 Method and apparatus for retrieving lost golf balls including golf ball picker and power drive device for moving the picker | 12 | 1994 | |
| 5,711,713 Modified theatrical counterweight apparatus | 13 | 1996 | |
| 6,299,139 Human power amplifier for vertical maneuvers | 28 | 1998 | |
| 6,520,485 Winch system for raising and lowering theatre scenery | 22 | 2000 | |
| 6,615,564 For a connector for joining adjacent flat roof panels coplanarly together | 9 | 2001 | |
| 6,802,170 Box beam and method for fabricating same | 6 | 2003 | |
| 7,264,227 Self-climbing stage light support | 4 | 2004 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jun 21, 2014 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jun 21, 2018 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 21, 2022 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |