Personal lift device
US7634825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2007 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Jun 24, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G2200/34
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.