IP Library › Granted Patent US 7,411,326
Granted Patent B2
US 7,411,326 · App. 11/435,958 · Granted Aug 12, 2008

BLDC motor and pump assembly with encapsulated circuit board

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,411,326
App. No.
11/435,958
Granted
Aug 12, 2008
Kind
B2
Abstract

A BLDC motor assembly and method for manufacturing same is disclosed. The motor has a housing, a shaft supported for rotation within the housing, a stator disposed within the housing for generating an electro-magnetic field, a rotor operatively coupled to the shaft and disposed for powered rotation within the stator in response to the electro-magnetic field, at least one temperature sensitive electronic device (TSED) disposed within the housing and electrically connected to the stator for controlling or measuring an aspect of the electro-magnetic field, and a fuel resistant and electrically insulated polymeric material encapsulating the TSED so that the TSED is protected from adverse temperature and chemical agents without the need for a separate internal container or a pre-potting operating. The TSED, which may be carried on a printed circuit board within the housing, is thus overmolded with polymeric material so that the polymeric material fills, or substantially fills, a space within the housing. Not only is the cost and weight associated with a prior art dedicated container for the electronics eliminated, but this invention allows greater design freedom in the location or placement of the various electrical devices within the housing for better motor efficiency and/or protection.

Claims (20)

1. A fuel pump assembly comprising:

a fluid pump for pumping fuel;

a rotor engaged with said fluid pump at a first end and having with a plurality of magnets;

a stator with a plurality of windings encircling said plurality of magnets of rotor;

a circuit board operable to control a current directed to said windings of said stator;

at least one sensor disposed to sense a proximity of said plurality of magnets and communicate a signal to said circuit board in response to said sensed proximity and wherein said circuit board controls the current at least partially in response to said signal; and

a polymeric body formed from fuel-resistant and electrically insulating material and encapsulating said circuit board and said at least one sensor and defining at least one passageway operable to directly receive a stream of fuel to cool said circuit board and said at least one sensor.

2. The fuel pump assembly of claim 1 wherein said at least one passageway is further defined as being substantially axially centered with respect to said polymeric body.

3. The fuel pump assembly of claim 1 wherein said polymeric body is further defined as encircling a portion of said rotor axially spaced from said plurality of magnets.

4. The fuel pump assembly of claim 3 further comprising:

a bearing supporting a second end of said rotor opposite said first end and supported by said polymeric body.

5. The fuel pump assembly of claim 4 wherein said at least one passageway substantially encircles said bearing.

6. The fuel pump assembly of claim 1 further comprising:

at least one cooling plate physically contacting said at least one sensor and having at least one surface open to said at least one passageway.

7. The fuel pump assembly of claim 6 wherein said at least one cooling plate further comprises:

at least one cooling fin projecting from at least one surface towards a center axis of said at least one passageway.

8. The fuel pump assembly of claim 1 wherein said polymeric body is further defined as encircling a portion of said stator.

9. The fuel pump assembly of claim 1 wherein said polymeric body is further defined as encircling both a portion of said rotor and a portion said stator.

10. The fuel pump assembly of claim 1 wherein at least a portion of said at least one passageway defines a multifid cross-section.

11. The fuel pump assembly of claim 10 wherein said polymeric body includes a plurality of cavities radially aligned with lobes of said multifid cross-section.

Assignments (35)
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 Sep 6, 2007
From: SERVO MAGNETICS, INC.
To: FEDERAL-MOGUL WORLD WIDE, INC.
Reel/Frame 019788/0930 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 16, 2006
From: MAHONEY, DANIEL L.
To: SERVO MAGNETICS, INC.
Reel/Frame 018415/0755 →
INTELLECTUAL PROPERTY AGREEMENT Recorded Oct 16, 2006
From: SERVO MAGNETICS INC.
To: FEDERAL-MOGUL CORPORATION
Reel/Frame 018416/0157 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 17, 2006
From: ACHOR, KYLE D.
To: FEDERAL MOGUL WORLD WIDE, INC.
Reel/Frame 017913/0308 →