Hoist with overspeed protection
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Dec 11, 2012
Grant Date -
Sep 23, 2010
app pub date -
Sep 4, 2009
filing date -
Mar 17, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A hoist system with an overspeed detection sub-system for detecting overspeed by comparing an actual drum assembly speed with a target value. For example, the rotation of a motor may be determined by a first rotary encoder and the rotation of a drum may be determined by a second rotary encoder. The output of the first rotary encoder (the basis of a target value) is compared with the output of the second rotary encoder (corresponding to actual motion of the drum). If the difference between the target value and the actual motion is too large, then a problem, such as a broken hoist hardware component may exist, and appropriate remedial action is taken, such as braking the motor and/or the drum.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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WENGER CORPORATION | 555 PARK DRIVE OWATONNA MN 55060 |
International Classification(s)

- 2009 Application Filing Year
- B66D Class
- 85 Applications Filed
- 58 Patents Issued To-Date
- 68.24 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Eschelbacher, Lawrence L | Marcellus, US | 1 | 13 |
# of filed Patents : 1 Total Citations : 13 | |||
Svitavsky, Peter V | Port Byron, US | 9 | 102 |
# of filed Patents : 9 Total Citations : 102 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 1 Citation Count
- B66D Class
- 5.45 % this patent is cited more than
- 13 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Jan 18, 2021 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
Jan 18, 2021 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Dec 11, 2020 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Dec 11, 2020 |
Aug 03, 2020 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
Nov 19, 2019 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:J R CLANCY, INC.;REEL/FRAME:051100/0258 Owner name: WENGER CORPORATION, MINNESOTA Effective Date: Nov 19, 2019 |
Jun 07, 2016 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Dec 11, 2012 | I | Issuance | |
Nov 21, 2012 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Sep 23, 2010 | P | Published | |
Dec 03, 2009 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ESCHELBACHER, LAWRENCE L.;SVITAVSKY, PETER V.;REEL/FRAME:023681/0414 Owner name: J. R. CLANCY, INC., NEW YORK Effective Date: Dec 03, 2009 |
Sep 04, 2009 | F | Filing | |
Mar 17, 2009 | PD | Priority Date |

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