Lifter with electropermanent magnets
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 4, 2018
Grant Date -
Sep 7, 2017
app pub date -
Aug 18, 2015
filing date -
Sep 9, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A lifter with electro-permanent magnets is provided. It has an external bearing structure closed at the bottom by a plate, provided with a heat shield, and pole pieces secured under the respective poles and protruding from the bottom plate. Each of the electro-permanent magnets has a reversible magnet arranged on top of one of the poles, of a fixed polarization magnet formed by a plurality of blocks placed along the lateral faces of the pole and of a coil arranged around the reversible magnet to cause the reversal of the polarization of the latter by means of an electrical pulse. An airtight air gap between 1 and 4 mm high is formed between each pole piece and the respective pole through the interposition of a plate of thermal insulation material that resists high temperatures provided at each pole with a rectangular window slightly smaller in size than the pole itself, with the top sides of the pole pieces and/or the bottom sides of the poles being provided with peripheral recesses suitable to act as seats for the positioning of the plate.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2015 Application Filing Year
- B66C Class
- 359 Applications Filed
- 310 Patents Issued To-Date
- 86.36 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B66C Class
- 39.57 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jun 4, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 4, 2030 |
