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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
METSO AUTOMATION USA INC	9 EAST LOOCKERMAN STREET DOVER DE 19901

International Classification(s)

• F16D:COUPLINGS FOR TRANSMITTING ROTATION
• F03G:SPRING, WEIGHT, INERTIA, OR LIKE MOTORS; MECHANICA....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Coe, Thomas Edward	Raymond, NH	4	33
# of filed Patents : 4 Total Citations : 33

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Patent Citation Ranking

• 13 Citation Count
• F16D Class

• 72.12 % this patent is cited more than
• 23 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
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

US Patent No: 6431317

Rotary electric actuator with a mechanical spring return back-up

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Abstract

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A tri-modal--energy storage mode, fail-safe mode, and operating mode--fail-safe actuator with low overall power consumption and specifically low fail-safe power consumption due to energy storage pawling mechanisms. Stored energy is discharged at a controlled rate in fail-safe mode. The actuator's sequencing through its three modes is enabled by a dual-cam/clutch system which is powered separately from the operational (shaft control) system.

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Description

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Claims

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Claims data not available

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Legal Events

 

• STCH2014
• FP2014
• LAPS2014
• REMI2014
• FPAY2010
• FPAY2006
• FEPP2005
• REFU2005
• AS2005
• I2002
• AS2001
• AS2001
• F2000
• PD1999

Date	Code	Event	Description
Sep 08, 2014	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Aug 13, 2014	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Aug 13, 2014
Aug 13, 2014	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Mar 21, 2014	REMI	MAINTENANCE FEE REMINDER MAILED
Feb 16, 2010	FPAY	FEE PAYMENT	year of fee payment: 8
Feb 13, 2006	FPAY	FEE PAYMENT	year of fee payment: 4
Dec 02, 2005	FEPP	FEE PAYMENT PROCEDURE	free format text: PAT HOLDER NO LONGER CLAIMS SMALL ENTITY STATUS, ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: STOL); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Dec 02, 2005	REFU	REFUND	free format text: REFUND - SURCHARGE, PETITION TO ACCEPT PYMT AFTER EXP, UNINTENTIONAL (ORIGINAL EVENT CODE: R2551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
Nov 30, 2005	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VALVCON CORPORATION;REEL/FRAME:016851/0118 Owner name: METSO AUTOMATION USA INC., MASSACHUSETTS Effective Date: Nov 30, 2005
Aug 13, 2002	I	Issuance
Aug 03, 2001	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COE, NANCY H.;REEL/FRAME:012065/0136 Owner name: VALVCON CORPORATION, NEW HAMPSHIRE Effective Date: Aug 03, 2001
May 02, 2001	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COE, THOMAS EDWARD;REEL/FRAME:011784/0194 Owner name: COE, NANCY H., NEW HAMPSHIRE Effective Date: May 02, 2001
Aug 11, 2000	F	Filing
Aug 12, 1999	PD	Priority Date