Traction apparatus and traction force control method of traction apparatus
US8028590B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 2007 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Nov 15, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61H2201/5064
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In the traction apparatus, a control circuit has the following traction control process portions. First, a first traction control process portion winds up the slack portion of a wire by a motor to eliminate the slack of the wire connected to a body to be pulled. Next, a second traction control process portion converts a set traction force that is set by an operation portion to a traction amount to calculate a converted value and, by defining a predetermined amount of a traction amount set based on the converted value as an initial target value, continuously winds up the wire by the motor to that target value. Next, a third traction control process portion detects the traction force that is being applied to the body to be pulled by a load cell, calculates a drive stop time of the motor by defining the set traction force as a final target value on the basis of a detected output of the load cell and drives the drive mechanism, and stops the driving of the motor at a point of reaching the drive stop time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.