IP Library Patent Application 12307359
Patent Application
App. No. 12/307,359

Manual Transmission

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Quick Facts
Patent No.
US None
App. No.
12/307,359
Filed
Oct 6, 2009
Art Unit
3658
USPC
74/473.21
Abstract

A manual transmission, in particular for an automobile, comprises a transmission housing ( 25 ), a drive and a driven shaft, which may be coupled to one another in different transmission ratios, a shifter shaft ( 1 ), which is rotatable and axially displaceable along predefined paths between positions corresponding to the different transmission ratios of the manual transmission, as well as at least one pair of guide elements ( 10, 5 ), which predefine these paths in a cooperating manner. The first ( 10 ) of the two guide elements is attached so that it can move with the shifter shaft ( 1 ) and the second ( 5 ) is attached to a first flange ( 26 ) connected to the transmission housing ( 25 ). The first flange ( 26 ) is fastened detachably to the transmission housing ( 25 ) and is connected to the shifter shaft ( 1 ) to form a structural unit.

Claims (12)

1 . A manual transmission for an automobile, comprising:

a transmission housing;

a drive and a driven shaft adapted to coupled to one another in different transmission ratios;

a shifter shaft that is rotatable and axially displaceable along a plurality of predefined paths between a plurality of positions corresponding to the different transmission ratios;

at least one pair of guide elements that predefine the plurality of predefined paths in a cooperating manner, wherein of the first element of the at least one pair of guide elements is attached for movement with the shifter shaft and the second element of the at least one pair of guide elements is attached to a first flange connected to the transmission housing, wherein the first flange is fastened detachable from the transmission housing and is connected to the shifter shaft.

2 . The manual transmission according to claim 1 , wherein the shifter shaft is guided through the first flange.

3 . The manual transmission according to claim 1 , wherein the first element comprises a tip and the second element comprises a guide contour scanned by the tip.

4 . The manual transmission according to claim 1 , wherein the at least one pair of guide elements are pressed toward one another by a spring having an adjustable spring force.

5 . The manual transmission according to claim 1 , wherein grooves defining the plurality of predefined paths are formed on a guide contour.

6 . The manual transmission according to claim 1 , wherein the first flange is fastened on a complementary second flange forming a component of the transmission housing and at least one of the first flange and the second flange has a centering body that engages in a complementary recess of the respectively other flange.

7 . The manual transmission according to claim 6 , wherein the centering body is part of the first flange and the second guide element is attached to the centering body.

8 . (canceled)

Assignments (11)
CHANGE OF NAME Recorded Feb 10, 2011
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Reel/Frame 025781/0245 →
SECURITY AGREEMENT Recorded Nov 8, 2010
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: WILMINGTON TRUST COMPANY
Reel/Frame 025324/0515 →
RELEASE OF SECURITY INTEREST Recorded Nov 5, 2010
From: UAW RETIREE MEDICAL BENEFITS TRUST
To: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Reel/Frame 025315/0046 →
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 023162/0237 →
SECURITY AGREEMENT Recorded Aug 27, 2009
From: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
To: UNITED STATES DEPARTMENT OF THE TREASURY
Reel/Frame 023156/0313 →
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 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 9, 2009
From: HELDMANN, OLAF
To: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Reel/Frame 022936/0266 →
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 →