Maintenance safety device for elevator and a operation method thereof

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10676321
APP PUB NO 20170355569A1
SERIAL NO

15615431

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The present invention provides a maintenance safety apparatus for an elevator system and a method for operating the same, and belongs to the technical field of elevators. The maintenance safety apparatus of the present invention comprises a safety switch, a door lock device, a linkage control assembly and a linkage locking assembly. The maintenance safety apparatus of the present invention is very simple to operate and is capable of ensuring the safety of the staff entering a hoistway for performing maintenance operations.

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First Claim

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Patent Owner(s)

  • OTIS ELEVATOR COMPANY

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wang, Bin Tianjin, CN 1025 8458

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Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Dec 9, 2023
7.5 Year Payment $3600.00 $1800.00 $900.00 Dec 9, 2027
11.5 Year Payment $7400.00 $3700.00 $1850.00 Dec 9, 2031
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
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