Industry Patents
Patent: 7080824
Chain Motor Drive Controller
(Click image for PDF of full patent)
| Patent Number: |
7080824 |
| Title: |
Chain Motor Drive Controller |
| Abstract: |
An improved chain motor drive controller is provided for a chain hoist.
The system employs a position encoder including a position sensor located
within the casing of the chain hoist to producing encoded electrical
position signals. A motor pulley is mounted on the chain motor rotary
drive shaft and is coupled by a cogged belt to rotate an encoder pulley
that is mounted on the same shaft as the position sensor. A mechanical
coupling is thereby provided entirely within the casing of the chain
hoist to transmit rotary motion from the rotary drive shaft directly to
the position sensor. Also, tracking circuitry, likewise located entirely
within the chain hoist casing, receives electrically encoded destination
signals and compares these to signals from the position sensor. The
tracking circuitry accelerates rotation of the chain motor drive shaft
starting from a stationary condition and decelerates rotation of the
chain motor drive shaft as the differences between the encoded position
signals and the encoded destination signals approach zero.
|
| Country of Issue: |
US |
| First Named Inventor: |
George, Bracegirdle, Peppard, Booth, Guth |
| Assignee: |
George & Goldberg Design Associates |
| Continuation or Divisional of: |
|
| International Classification: |
B66D 1/50 |
| US Classification: |
254/267 |
| Issue Date: |
07-25-2006 |
| Filing Date: |
04-09-2004 |
| Application : |
10/821429 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7080824 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7080824 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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