Jeffrey M Curtis

US Patent:

7219642, May 22, 2007

Filed:

Feb 10, 2006

Appl. No.:

11/352936

Inventors:

Adam S. Kwiatkowski - Commerce MI, US
Randall S. Beikmann - Brighton MI, US
Julie A. Brown - Ann Arbor MI, US
Jeffrey D. Curtis - Belleville MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F02B 77/00

US Classification:

123195C

Abstract:

A cast oil pan is connected between en engine crankcase and a lower end portion of a transmission bellhousing. Oil pan side walls each incorporate an integrally cast truss extending between an end flange of the oil pan and adjacent portions of an upper flange to stiffen the connection of the engine crankcase with the transmission bellhousing. Each truss includes a horizontal rail, a plurality of bolt columns extending between the horizontal rail and the upper flange adjacent corresponding bolt openings. Diagonal ribs extend from the oil pan flange generally toward the peripheral end flange. Oil pan bolts at the truss locations pass through the horizontal rail and the oil pan upper flange adjacent the bolt columns so that bolt clamping forces are carried through the bolt columns. The heads of the bolts are positioned below the horizontal rail accessible by power tools for securing and removing the bolts.

US Patent:

20220213955, Jul 7, 2022

Filed:

Jan 5, 2021

Appl. No.:

17/141594

Inventors:

- Detroit MI, US
John Miller - Howell MI, US
Martin G. Foulkes - Howell MI, US
Jeffrey D. Curtis - South Lyon MI, US
Jack M. Gayney - Grosse Ile MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

F16H 57/028
F16H 57/021

Abstract:

A sound reduction assembly includes a housing and a component supported via the housing. The component is movable relative to the housing. The sound reduction assembly includes a ring coupled to the component and the housing. The ring is configured to attenuate sound inducing vibrations in response to operation of the component. The ring includes a flange fixed relative to the housing to maintain a position of the ring relative to the component which maximizes attenuation of the sound in response to operation of the component. A method of utilizing a ring to attenuate sound inducing vibrations in response to operation of a component inside of a housing. A torque is selected to be applied to the ring. A stiffness of the ring is determined based on a stiffness-torque curve utilizing the selected torque to maximize attenuation of the sound. The ring is manufactured to meet the determined stiffness.