Beds – With means for relocating an invalid – With a hoisting – lifting – elevating – or raising device
Reexamination Certificate
2007-05-14
2009-12-22
Trettel, Michael (Department: 3673)
Beds
With means for relocating an invalid
With a hoisting, lifting, elevating, or raising device
C005S085100
Reexamination Certificate
active
07634825
ABSTRACT:
A personal lift device is disclosed having a motor having an output shaft. A gearing system is operatively connected to the output shaft for increasing torque. A strap for suspending a weight is wound onto a spool and rotating the spool extends and retracts the strap. A drive connection is made between the gearing system and the spool to permit said motor to drive said spool. A brake is associated with said spool to prevent unwanted extension of said strap from said spool, when a weight is suspended by said strap. In a preferred embodiment a clutch is provided between the brake and the drive train, and the greater the weight supported by the spool the greater the braking force. An emergency lift and lower device is also provided in the event of a failure of the motor.
REFERENCES:
patent: 4243147 (1981-01-01), Twitchell et al.
patent: 4372452 (1983-02-01), McCord
patent: 4944056 (1990-07-01), Schroeder et al.
patent: 5138953 (1992-08-01), Horcher et al.
patent: 5694654 (1997-12-01), Roy
patent: 5809591 (1998-09-01), Capaldi et al.
patent: 6085368 (2000-07-01), Robert et al.
patent: 6523195 (2003-02-01), Rodier et al.
patent: 7240621 (2007-07-01), Chepurny et al.
patent: 3432043 (1986-03-01), None
patent: 3442138 (1986-05-01), None
patent: 9421601 (1996-07-01), None
patent: 0026133 (2000-05-01), None
Chepurny Mark
Molnar Gordon J.
Wilson Michael F.
Prism Medical Ltd.
Trettel Michael
Vidas Arrett & Steinkraus
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