IP Library › Granted Patent US 7,847,457
Granted Patent B2
US 7,847,457 · App. 11/746,086 · Granted Dec 7, 2010

BLDC motor assembly

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Quick Facts
Patent No.
US 7,847,457
App. No.
11/746,086
Granted
Dec 7, 2010
Kind
B2
Abstract

A BLDC electric motor assembly ( 24 ) includes a rotor ( 42 ) having a plurality of magnet segments ( 50 ) securely retained thereabout by an annular ring ( 68 ) which is shrunk in situ in an electromagnetic forming operation. The magnet segments ( 50 ) are formed with tongues ( 62, 64 ) on their upper and lower ends ( 56, 58 ). One tongue ( 64 ) seats in a retaining pocket ( 48 ) molded on the rotor shaft ( 40 ), whereas the other tongue ( 62 ) provides a ledge into which the ring ( 68 ) seats. After the magnet forming operation, wherein the ring ( 68 ) is shrunk, the outer surface of the ring ( 68 ) is flush with the outer surfaces ( 54 ) of the magnet segments ( 50 ).

Claims (15)

1. A brushless direct current (BLDC) electric motor assembly of the type used in liquid fuel pumps and the like, said motor assembly comprising:

a stator for producing a controlled electro-magnetic field, said stator defining a central longitudinal axis;

a shaft supported for rotation about said longitudinal axis, said shaft including a hub section having an outer surface;

a plurality of permanent magnet segments supported on said outer surface of said hub for co-rotation with said shaft, each of said magnet segments having opposite, longitudinally spaced ends, said magnet segments arranged side-by-side in equal arcuate increments around said hub;

an annular ring encircling at least one of said ends of said arrayed plurality of magnet segments, said ring having been deformed in an electromagnetic forming operation so as to exert a generally uniform compression on each of said magnet segments to hold said magnet segments in an operative position around said hub; and

said hub section including an integral retaining pocket for receiving one of said longitudinally spaced ends of each of said magnets.

2. The assembly of claim 1 wherein said ring is fabricated from a metallic material.

3. The assembly of claim 2 wherein said ring is fabricated from aluminum or an alloy thereof.

4. The assembly of claim 1 wherein said retaining pocket includes anti-rotation lugs for preventing rotation of magnet segments relative to hub.

5. The assembly of claim 4 wherein each of said magnet segment includes a first tongue adjacent one of said longitudinally spaced ends for receiving said ring.

6. The assembly of claim 5 wherein each of said magnet segments includes a second tongue adjacent the other of said longitudinally spaced ends for seating in said retaining pocket.

7. The assembly of claim 1 further including a pump drive coupling integrally formed with said retaining pocket on said shaft.

8. The assembly of claim 1 wherein said ring is rotationally balanced about said longitudinal axis.

9. The assembly of claim 1 wherein each of said magnetic segments includes a convex, semi-cylindrical outer surface.

10. The assembly of claim 9 wherein said ring has an outer circumferential edge generally aligned flush with said outer surface of each of said magnet segments.

Assignments (32)
LIEN Recorded Dec 8, 2025
From: JEFFERIES FINANCE LLC
To: WILMINGTON SAVINGS FUND SOCIETY, FSB
Reel/Frame 073892/0154 →
LIEN Recorded Dec 3, 2025
From: JEFFERIES FINANCE LLC
To: WILMINGTON SAVINGS FUND SOCIETY, FSB
Reel/Frame 073819/0490 →
FIRST LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Jun 18, 2025
From: AIRTEX INDUSTRIES, LLC; AIRTEX PRODUCTS, LP; APC INTERMEDIATE HOLDINGS, LLC; APC PARENT, LLC; ASC INDUSTRIES, INC.; AUTOLITE OPERATIONS LLC; AVM EXPORT, INC.; BPI ACQUISITION COMPANY, LLC; BPI EC, LLC; BPI HOLDINGS INTERNATIONAL, LLC; BRAKE PARTS INC CHINA LLC; BRAKE PARTS INC INDIA LLC; BRAKE PARTS INC LLC; CARDONE INDUSTRIES, INC.; CARRAND COMPANIES, INC.; CARTER CARBURETOR HOLDINGS, LLC; CARTER CARBURETOR, LLC; CARTER FUEL EXPORT, INC.; CARTER FUEL SYSTEMS, LLC; CHAMPION LABORATORIES, INC.; CWD HOLDING, LLC; CWD INTERMEDIATE HOLDINGS I, LLC; CWD INTERMEDIATE HOLDINGS II, LLC; CWD, LLC; DALTON CORPORATION; DALTON CORPORATION, KENDALLVILLE; MANUFACTURING FACILITY DALTON CORPORATION, ASHLAND; MANUFACTURING FACILITY DALTON CORPORATION, STRYKER MACHINING FACILITY CO.; DALTON CORPORATION, WARSAW MANUFACTURING FACILITY; EAGLE CASTING, LLC; EAGLE MACHINING, LLC; FIRST BRANDS GROUP INTERMEDIATE, LLC; FIRST BRANDS GROUP, LLC; FRAM GROUP IP LLC; FRAM GROUP OPERATIONS LLC; FRAMAUTO HOLDINGS, LLC; FUEL FILTER TECHNOLOGIES, INC.; GLOBAL REMAN VENTURES, LLC; HEATHERTON HOLDINGS, LLC; HOPKINS ACQUISITION, INC.; HOPKINS MANUFACTURING CORPORATION; HORIZON EURO FINANCE LLC; HORIZON GLOBAL AMERICAS INC.; HORIZON GLOBAL COMPANY LLC; HORIZON GLOBAL CORPORATION; HORIZON INTERNATIONAL HOLDINGS LLC; IBI INTERNATIONAL HOLDING COMPANY, INC.; INTERNATIONAL BRAKE INDUSTRIES, INC.; JASPER ACQUISITION CORP.; JASPER RUBBER PRODUCTS, INC.; KTRI HOLDINGS, INC.; KTRI OFFSHORE HOLDINGS, LLC; LONGMAN ENTERPRISES, INC.; PHNX ACQUISITION CORP.; PREMIER MARKETING GROUP, LLC; PYLON MANUFACTURING CORP.; PYLON SOUTH BEND, INC.; QUALIS AUTOMOTIVE, L.L.C.; QUALIS ENTERPRISES, LLC; QUALITOR ACQUISITION INC.; QUALITOR AUTOMOTIVE, LLC; QUALITOR SUBSIDIARY H, INC.; QUALITOR SUBSIDIARY S, INC.; QUALITOR, INC.; REMAN MANAGEMENT INTERNATIONAL LLC; SDC TX, LLC; SMART CHOICE, LLC; SPECIALTY PUMPS GROUP, INC.; STRONGARM, LLC; TAE BRAKES, LLC; TAE CHINA HOLDINGS, INC.; TMD INTERNATIONAL HOLDINGS LLC; TMD MEXICO LLC; TOLEDO MOLDING & DIE, LLC; TRANSPORTATION AFTERMARKET ENTERPRISE, LLC; TRICO HOLDING CORPORATION; TRICO PRODUCTS CORPORATION; TRICO TECHNOLOGIES CORPORATION; TRIDONEX USA LLC; UCI ACQUISITION HOLDINGS (NO. 4) LLC; UCI INTERNATIONAL HOLDINGS PARENT, INC.; UCI INTERNATIONAL HOLDINGS, INC.; UCI INTERNATIONAL, LLC; UCI PENNSYLVANIA, INC.; UCI-AIRTEX HOLDINGS, INC.; UNITED COMPONENTS, LLC; UNIVERSAL AUTO FILTER LLC; VIPER ACQUISITION I, INC.; VIPER ACQUISITION, INC.; WALBRO LLC; WALBRO MIDCO LLC; WEM US CO.
To: GLAS USA LLC
Reel/Frame 071674/0688 →
RELEASE OF SECURITY INTEREST Recorded Jan 12, 2023
From: CITIBANK, N.A.
To: FEDERAL-MOGUL WORLD WIDE LLC (FORMERLY FEDERAL-MOGUL WORLD WIDE, INC.)
Reel/Frame 062389/0149 →
CORRECTIVE ASSIGNMENT TO CORRECT THE THE PATENT APPLICATION NUMBERS PREVIOUSLY RECORDED AT REEL: 053377 FRAME: 0596. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Dec 19, 2022
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: JEFFERIES FINANCE LLC
Reel/Frame 062584/0429 →
CORRECTIVE ASSIGNMENT TO CORRECT THE INCORRECT PATENT REGISTRATION NUMBERS:8166953, 6673433, 6631292, 7392363, 7265473 8535456, 9709133 PREVIOUSLY RECORDED ON REEL 053377 FRAME 0499. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF SECURITY INTEREST. Recorded Apr 9, 2021
From: CREDIT SUISSE AG
To: JEFFERIES FINANCE LLC
Reel/Frame 058292/0469 →
ASSIGNMENT OF SECURITY INTEREST Recorded Jul 31, 2020
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: JEFFERIES FINANCE LLC
Reel/Frame 053377/0596 →
ASSIGNMENT OF SECURITY INTEREST Recorded Jul 31, 2020
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: JEFFERIES FINANCE LLC
Reel/Frame 053377/0499 →
RELEASE OF INTELLECTUAL PROPERTY SECURITY INTEREST Recorded May 25, 2020
From: ACQUIOM AGENCY SERVICES LLC
To: ASC INDUSTRIES, INC.; CARTER FUEL SYSTEMS, LLC; FRAM GROUP IP LLC; STRONGARM, LLC; TRICO PRODUCTS CORPORATION; TRICO GROUP, LLC; TRICO GROUP HOLDINGS, LLC
Reel/Frame 053313/0812 →
SECURITY INTEREST Recorded Apr 23, 2020
From: CARTER FUEL SYSTEMS, LLC
To: ACQUIOM AGENCY SERVICES LLC
Reel/Frame 052481/0512 →
ASSIGNMENT OF SECURITY INTEREST IN INTELLECTUAL PROPERTY RIGHTS Recorded Feb 27, 2019
From: GOLDMAN SACHS BANK USA, AS COLLATERAL AGENT
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 048455/0762 →
SECOND LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Feb 27, 2019
From: ASC INDUSTRIES, INC.; CARTER FUEL SYSTEMS, LLC; FRAM GROUP IP LLC; HEATHERTON HOLDINGS, LLC; STRONGARM, LLC; TRICO PRODUCTS CORPORATION
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 048887/0495 →
TERMINATION OF SECURITY INTEREST IN PATENTS AT REEL/FRAME 038847/0322 Recorded Feb 6, 2018
From: HPS INVESTMENT PARTNERS, LLC
To: AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS LLC; TRICO PRODUCTS CORPORATION; PARTHENON METAL WORKS, LLC
Reel/Frame 045261/0321 →
TERMINATION OF SECURITY INTEREST IN PATENTS AT REEL/FRAME 33958/0771 Recorded Feb 6, 2018
From: JPMORGAN CHASE BANK, N.A.
To: TRICO PRODUCTS CORPORATION; AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS LLC
Reel/Frame 045261/0197 →
ABL INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Feb 5, 2018
From: CARTER FUEL SYSTEMS; STRONGARM, LLC; TRICO PRODUCTS CORPORATION
To: GOLDMAN SACHS BANK USA
Reel/Frame 045252/0469 →
RELEASE OF SECURITY INTEREST Recorded Feb 5, 2018
From: HPS INVESTMENT PARTNERS, LLC
To: AVM INDUSTRIES, LLC; TRICO PRODUCTS CORPORATION; CARTER FUEL SYSTEMS, LLC; PARTHENON METAL WORKS, LLC
Reel/Frame 045252/0543 →
FIRST LIEN INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Feb 5, 2018
From: CARTER FUEL SYSTEMS; STRONGARM, LLC; TRICO PRODUCTS CORPORATION
To: GOLDMAN SACHS BANK USA
Reel/Frame 045252/0800 →
RELEASE OF SECURITY INTEREST Recorded May 30, 2016
From: JEFFERIES FINANCE LLC
To: TRICO PRODUCTS CORPORATION; AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS, LLC
Reel/Frame 038847/0400 →
SECURITY INTEREST Recorded May 30, 2016
From: AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS, LLC; TRICO PRODUCTS CORPORATION; PARTHENON METAL WORKS, LLC
To: HPS INVESTMENT PARTNERS, LLC
Reel/Frame 038847/0322 →
RELEASE OF SECURITY INTEREST Recorded May 30, 2016
From: JEFFERIES FINANCE LLC
To: TRICO PRODUCTS CORPORATION; AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS, LLC
Reel/Frame 038847/0154 →
RELEASE OF SECURITY INTEREST Recorded Oct 13, 2014
From: JPMORGAN CHASE BANK, N.A.
To: CARTER FUEL SYSTEMS, LLC; AVM INDUSTRIES, LLC
Reel/Frame 033974/0133 →
SECURITY INTEREST Recorded Oct 10, 2014
From: TRICO PRODUCTS CORPORATION; AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS, LLC
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 033958/0771 →
RELEASE OF SECURITY INTEREST IN PATENTS AND TRADEMARKS Recorded Oct 6, 2014
From: MWV PINNACLE CAPITAL FUND, L.P.
To: CARTER FUEL SYSTEMS, LLC
Reel/Frame 033897/0135 →
SECURITY INTEREST Recorded Oct 2, 2014
From: TRICO PRODUCTS CORPORATION; AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS, LLC
To: JEFFERIES FINANCE LLC, AS SECOND LIEN TERM LOAN ADMINISTRATIVE AGENT
Reel/Frame 033886/0719 →
SECURITY INTEREST Recorded Oct 2, 2014
From: TRICO PRODUCTS CORPORATION; AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS, LLC
To: JEFFERIES FINANCE LLC, AS FIRST LIEN TERM LOAN ADMINISTRATIVE AGENT
Reel/Frame 033886/0695 →
SECURITY AGREEMENT Recorded Oct 18, 2013
From: CARTER FUEL SYSTEMS, LLC
To: MWV PINNACLE CAPITAL FUND, L.P.
Reel/Frame 031436/0508 →
SECURITY AGREEMENT Recorded Oct 8, 2013
From: AVM INDUSTRIES, LLC; CARTER FUEL SYSTEMS, LLC
To: JP MORGAN CHASE BANK, N.A.
Reel/Frame 031393/0769 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 3, 2013
From: FEDERAL-MOGUL CORPORATION
To: CARTER FUEL SYSTEMS, LLC
Reel/Frame 031334/0429 →
RELEASE OF SECURITY INTEREST Recorded Oct 2, 2013
From: CITIBANK, N.A., AS COLLATERAL TRUSTEE
To: FEDERAL-MOGUL WORLD WIDE, INC.
Reel/Frame 031324/0055 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 20, 2013
From: FEDERAL-MOGUL WORLD WIDE, INC.
To: FEDERAL-MOGUL CORPORATION
Reel/Frame 031246/0838 →
SECURITY AGREEMENT Recorded Jan 3, 2008
From: FEDERAL-MOGUL WORLD WIDE, INC.
To: CITIBANK, N.A. AS COLLATERAL TRUSTEE
Reel/Frame 020362/0139 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 9, 2007
From: ACHOR, KYLE D.
To: FEDERAL-MOGUL WORLD WIDE, INC.
Reel/Frame 019266/0288 →