IP Library › Patent Application 12134064
Patent Application
App. No. 12/134,064

CRANKSHAFT

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 None
App. No.
12/134,064
Abstract

A crankshaft, in particular to be developed as part of an internal combustion engine of a motor vehicle, with at least one main bearing for connecting the crankshaft with an engine block, wherein the main bearing is developed at least partly, so that the axial border areas of the main bearing are convexly opposite the mid-section of the main bearing configured between the axial border areas, and/or with at least one large end bearing to connect the crankshaft with a connecting rod, wherein the large end bearing is at least partially developed so that the axial border areas of the large end bearings are convexly opposite the mid-section of the large end bearing, configured between the axial border areas. Through that it is possible to increase the stiffness of the crankshaft, without the need to alter the fittings on the main bearing and/or on the large end bearing.

Claims (8)

1 . A crankshaft for an internal combustion of a motor vehicle, comprising:

a main bearing configured to connect the crankshaft with an engine block; wherein the main bearing is at least partially configured such that axial border areas of the main bearing convexly opposite a mid-section of the main bearing is between the axial border areas; and

an end bearing configured to connect the crankshaft with a connecting rod, wherein the one end bearing is at least partially configured such that axial border areas of the end bearing convexly opposite the mid-section of the end bearing is between the axial border areas.

2 . The crankshaft according to claim 1 , wherein the diameter of the axial border areas of the main bearing comprises a ratio of at least 23/21 to the diameter of the middle area of the main bearing and the diameter of the axial border areas of the end bearing to the diameter of a middle area of the end bearing comprises a ratio of at least 23/21.

3 . The crankshaft according to claim 1 , wherein the axial border areas of the main bearing comprises a larger clearance than the mid-section of the main bearing.

4 . The crankshaft according to claim 1 , wherein the axial border areas of the end bearing comprises a larger clearance than the mid-section of the end bearing.

5 . The crankshaft according to claim 1 , wherein the main bearing is produced through a machining process.

6 . The crankshaft according to claim 1 , wherein the end bearing is produced through a machining process.

Assignments (12)
CHANGE OF NAME Recorded Feb 10, 2011
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Reel/Frame 025781/0211 →
SECURITY AGREEMENT Recorded Nov 8, 2010
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: WILMINGTON TRUST COMPANY
Reel/Frame 025324/0475 →
RELEASE OF SECURITY INTEREST Recorded Nov 5, 2010
From: UAW RETIREE MEDICAL BENEFITS TRUST
To: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Reel/Frame 025315/0001 →
RELEASE OF SECURITY INTEREST Recorded Nov 4, 2010
From: UNITED STATES DEPARTMENT OF THE TREASURY
To: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Reel/Frame 025245/0909 →
SECURITY AGREEMENT Recorded Aug 28, 2009
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: UAW RETIREE MEDICAL BENEFITS TRUST
Reel/Frame 023162/0187 →
SECURITY AGREEMENT Recorded Aug 27, 2009
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: UNITED STATES DEPARTMENT OF THE TREASURY
Reel/Frame 023156/0215 →
RELEASE OF SECURITY INTEREST Recorded Aug 21, 2009
From: UNITED STATES DEPARTMENT OF THE TREASURY
To: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Reel/Frame 023126/0914 →
RELEASE OF SECURITY INTEREST Recorded Aug 21, 2009
From: CITICORP USA, INC. AS AGENT FOR BANK PRIORITY SECURED PARTIES; CITICORP USA, INC. AS AGENT FOR HEDGE PRIORITY SECURED PARTIES
To: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Reel/Frame 023155/0769 →
SECURITY AGREEMENT Recorded Apr 16, 2009
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: CITICORP USA, INC. AS AGENT FOR BANK PRIORITY SECURED PARTIES; CITICORP USA, INC. AS AGENT FOR HEDGE PRIORITY SECURED PARTIES
Reel/Frame 022554/0538 →
SECURITY AGREEMENT Recorded Feb 4, 2009
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: UNITED STATES DEPARTMENT OF THE TREASURY
Reel/Frame 022201/0448 →
CORRECTION TO THE ASSIGNMENT RECORDATION COVER SHEET TO CORRECT THE TYPOGRAPHICAL ERROR IN THE ASSIGNEE NAME RECORDED AT REEL: 021057 AND FRAME 0632 Recorded Jan 8, 2009
From: BREIDENBACH, PAUL; HILGER, FRANK
To: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Reel/Frame 022075/0182 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 5, 2008
From: BREIDENBACH, PAUL; HILGER, FRANK
To: GM GLOBAL TECHNOLOGY, INC.
Reel/Frame 021057/0632 →