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Shifting unit for an automatic transmission
   
Document Number
US Patent 7334492
Issued Date
February 26, 2008
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Inventors
Muller; Bernd (Friedrichshafen,DE)
Steinborn; Mario (Friedrichshafen,DE)
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Abstract
A shifting unit (1) for an automatic transmission, especially controlled by pressurized medium for an automobile, with multiple valves which are connected to each other through a pressure supply line (30) and a pressure reduction line (32). The chambers (16, 18) of servo cylinders (10, 12) fitted with servo actuators contain at least one shift valve each (22, 24, 26, 28). There is a pressure accumulator (36) designed in between the pressure supply line (30) and the shift valves (22, 24, 26, 28).
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Number of Claims:
13
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Owner
ZF Friedrichshafen AG (Friedrichshafen,DE)
Published
February 26, 2008
Application Number
11/284,474
Filed
November 22, 2005
US Classification
74/335  
Int'l Classification
F16H   59/00   (20060101)  
Examiner
Priority Data
Nov 23, 2004 [DE] 10 2004 056 407
USPTO Field of Search
74/335  
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