IP Library › Granted Patent US 7,617,810
Granted Patent B1
US 7,617,810 · App. 11/949,425 · Granted Nov 17, 2009

Counterweight shaft construction which reduces lubricant aeration

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Quick Facts
Patent No.
US 7,617,810
App. No.
11/949,425
Granted
Nov 17, 2009
Kind
B1
Abstract

A casing is provided to be disposed around at least a portion of a counterweight of a balance shaft in order to define a circumferential surface surrounding the counterweight which has a generally constant radius relative to the axis of rotation. The function of the casing is to reduce or eliminate aeration of oil in which the balance shaft is disposed.

Claims (12)

1. A shaft of an engine, comprising:

a counterweight attached to said shaft for rotation with said shaft about an axis of rotation, said counterweight having a center of gravity which is displaced radially from said axis of rotation; and

a casing disposed at least partially around said counterweight to define an outer surface surrounding said counterweight, said casing comprising a polymer material which is over molded on said counterweight, all surfaces of said counterweight which are not directly in contact with said shaft being completely encased within said polymer material.

2. The shaft of claim 1 , wherein:

said outer surface comprises a generally circumferential surface which has a generally constant radius relative to said axis of rotation.

3. The shaft of claim 1 , wherein:

said shaft is a balance shaft which rotates in synchrony with a crankshaft of said engine.

4. The shaft of claim 1 , wherein:

said shaft is a crankshaft of said engine.

5. A shaft of an engine, comprising:

a counterweight attached to said shaft for rotation with said shaft about an axis of rotation, said counterweight having a center of gravity which is displaced radially from said axis of rotation; and

a casing disposed at least partially around said counterweight to define an outer surface surrounding said counterweight, said shaft being a balance shaft of said engine, said outer surface comprising a generally circumferential surface which has a generally constant radius relative to said axis of rotation, said casing comprising a polymer material which is over molded on said counterweight, all surfaces of said counterweight which are not directly in contact with said shaft being completely encased within said polymer material.

Assignments (7)
RELEASE OF SECURITY INTEREST Recorded Jan 22, 2015
From: JPMORGAN CHASE BANK, N.A.
To: BRUNSWICK CORPORATION; ATTWOOD CORPORATION; BOSTON WHALER, INC.; BRUNSWICK COMMERCIAL & GOVERNMENT PRODUCTS, INC.; BRUNSWICK FAMILY BOAT CO. INC.; BRUNSWICK LEISURE BOAT COMPANY, LLC; LAND 'N' SEA DISTRIBUTING, INC.; LUND BOAT COMPANY; BRUNSWICK BOWLING & BILLIARDS CORPORATION
Reel/Frame 034794/0300 →
RELEASE OF SECURITY INTEREST Recorded Jan 13, 2014
From: THE BANK OF NEW YORK MELLON
To: BRUNSWICK CORPORATION
Reel/Frame 031973/0242 →
SECURITY AGREEMENT Recorded Apr 4, 2011
From: BRUNSWICK CORPORATION; ATTWOOD CORPORATION; BOSTON WHALER, INC.; BRUNSWICK COMMERICAL & GOVERNMENT PRODUCTS, INC.; BRUNSWICK FAMILY BOAT CO. INC.; BRUNSWICK LEISURE BOAT COMPANY, LLC; LAND 'N' SEA DISTRIBUTING, INC.; LUND BOAT COMPANY; BRUNSWICK BOWLING & BILLIARDS CORPORATION; LEISERV, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 026072/0239 →
RELEASE OF SECURITY INTEREST Recorded Mar 25, 2011
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: BRUNSWICK CORPORATION; TRITON BOAT COMPANY, L.P.; ATTWOOD CORPORATION; BOSTON WHALER, INC.; BRUNSWICK COMMERICAL & GOVERNMENT PRODUCTS, INC.; BRUNSWICK FAMILY BOAT CO. INC.; BRUNSWICK LEISURE BOAT COMPANY, LLC; LAND 'N' SEA DISTRIBUTING, INC.; LUND BOAT COMPANY; BRUNSWICK BOWLING & BILLIARDS CORPORATION
Reel/Frame 026026/0001 →
SECURITY AGREEMENT Recorded Aug 28, 2009
From: BRUNSWICK CORPORATION; ATTWOOD CORPORATION; BOSTON WHALER, INC.; BRUNSWICK COMMERCIAL & GOVERNMENT PRODUCTS, INC.; BRUNSWICK FAMILY BOAT CO. INC.; BRUNSWICK LEISURE BOAT COMPANY, LLC; LAND 'N' SEA DISTRIBUTING, INC.; LUND BOAT COMPANY; BRUNSWICK BOWLING & BILLIARDS CORPORATION; TRITON BOAT COMPANY, L.P.
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 023180/0493 →
SECURITY AGREEMENT Recorded Jan 7, 2009
From: BRUNSWICK CORPORATION; TRITON BOAT COMPANY, L.P.; ATTWOOD CORPORATION; BOSTON WHALER, INC.; BRUNSWICK COMMERCIAL & GOVERNMENT PRODUCTS, INC.; BRUNSWICK FAMILY BOAT CO. INC.; BRUNSWICK LEISURE BOAT COMPANY, LLC; LAND 'N' SEA DISTRIBUTING, INC.; LUND BOAT COMPANY; BRUNSWICK BOWLING & BILLIARDS CORPORATION
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 022092/0365 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 3, 2007
From: PHILLIPS, GEORGE E.; JASZEWSKI, WAYNE M.; FUGAR, GREGORY L.
To: BRUNSWICK CORPORATION
Reel/Frame 020188/0623 →