# US 8,240,446 B2 · Clutch assembly with formed retention ring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,240,446 B2 - Document ID: US8240446B2 - Status: Granted - Kind: B2 - Application number: 13/153,869 - Filed: 2011-06-06 - Published: 2011-12-08 - Granted: 2012-08-14 - Earliest claimed: 2010-06-04 - Assignees: Szuba Consulting, Inc.; Value Extraction LLC - Inventors: Joseph Szuba - Web page: https://patentgrep.com/patent/US8240446B2 ## CPC - F16D 13/683: {for clutches with multiple lamellae} - F16D 13/70: Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members {(clutch flywheels comprising two or more masses with a rotational damper F16F15/12)} - F16D 25/0638: with more than two discs, e.g. multiple lamellae - F16D 2250/0023: Shaping by pressure - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A clutch assembly for a vehicle transmission includes a housing defined by a wall having an annular configuration circumscribing a clutch axis. The wall extends between an open end and a floor. The floor extends inwardly from the wall toward the clutch axis. A plurality of splines formed in the wall and each is spaced from the open end of the housing. A snap ring retains clutch plates in the housing. The open end of the wall is deformed inwardly toward the clutch axis defining a retainer for retaining the snap ring within the housing. ## Claims ### Claim 1 A clutch assembly for a transmission, comprising: a housing defined by a wall having an annular configuration circumscribing a clutch axis, said wall extending between an open end and a floor, said floor extending inwardly from said wall toward said clutch axis; a plurality of splines formed in said wall, said splines being spaced from said open end of said housing; a snap ring for retaining clutch plates in said housing; said open end of said wall being deformed inwardly toward said clutch axis defining a retainer for retaining said snap ring within said housing in a space disposed between said retainer and said splines; and said wall of said housing includes a major housing diameter and a minor housing diameter, said retainer defining a minor retainer diameter being truncated between said major housing diameter and said minor housing diameter. ### Claim 2 (depends on 1) The assembly set forth in claim 1, wherein said retainer provides three hundred sixty degrees of contact retention to said snap ring. ### Claim 3 (depends on 1) The assembly set forth in claim 1, comprising a plurality of tabs extending radially inwardly from said retainer. ### Claim 4 (depends on 3) The assembly set forth in claim 3, wherein said tabs circumferentially overly said splines. ### Claim 5 (depends on 1) The assembly set forth in claim 1, wherein said clutch plates include a peripheral edge and said peripheral edge defines a plurality of plate teeth of thereby defining a plate major diameter, said plate major diameter being lesser than said housing major diameter. ### Claim 6 (depends on 1) The assembly set forth in claim 1, wherein said splines formed in said wall of said housing are spaced from said floor of said housing. ### Claim 7 (depends on 1) The assembly set forth in claim 1, including a plurality of clutch rings being retained within said clutch housing by said snap ring. ### Claim 8 A clutch assembly for a transmission, comprising: a housing defined by a wall having an annular configuration circumscribing a clutch axis, said wall extending between an open end and a floor, said floor extending inwardly from said wall toward said clutch axis; a plurality of splines formed in said wall, said splines being spaced from said open end of said housing; a snap ring for retaining clutch plates in said housing; said open end of said wall being deformed inwardly toward said clutch axis defining a retainer for retaining said snap ring within said housing in a space disposed between said retainer and said splines; and said retainer includes a retainer wall disposed radially outwardly from said annular wall of said housing. ### Claim 9 A clutch housing for use in a transmission, the housing enclosing clutch plates interacting with a drive shaft of a vehicle, comprising: a wall having a tubular configuration with an open end and a partially closed end, said partially closed end having a floor extending radially inwardly from said wall; a plurality of splines formed into said wall thereby providing gear like engagement with the clutch plates disposed inside said housing, said plurality of splines being spaced from said open end of said wall; a retainer defined by a hem extending from said open end of said wall, said hem extending radially inwardly from said wall for retaining a snap ring used to retain the clutch plate assemblies within said clutch housing; and said retainer defining a major retainer diameter, said housing defining a minor housing diameter and a major housing diameter, said major retainer diameter being greater than said minor housing diameter and said major housing diameter. ### Claim 10 (depends on 9) The clutch housing set forth in claim 9, comprising a plurality of tabs extending radially inwardly from said retainer. ### Claim 11 (depends on 10) The clutch housing set forth in claim 10, wherein each of said tabs are circumferentially aligned with one of said plurality of splines formed in said wall of said clutch housing. ### Claim 12 (depends on 9) The clutch housing set forth in claim 9, wherein said plurality of splines are spaced from said floor of said clutch housing. ### Claim 13 (depends on 9) The clutch housing set forth in claim 9, wherein each of said plurality of splines define a continuous surface. ### Claim 14 (depends on 9) The clutch housing set forth in claim 9, wherein said retainer defines a space with said plurality of splines for receiving a snap ring. ### Claim 15 (depends on 9) The clutch housing set forth in claim 9, wherein said retainer defines a retainer wall disposed radially outwardly from said annular wall of said housing. ### Claim 16 (depends on 9) The clutch housing set forth in claim 9, wherein said clutch plates include a plurality of teeth for engaging said plurality of splines and said clutch teeth define a major teeth diameter being less than said major retainer diameter. ### Claim 17 (depends on 9) The clutch housing set forth in claim 9, wherein said retainer engages said snap ring along three hundred sixty degrees of said wall having a tubular configuration. ### Claim 18 (depends on 9) The assembly set forth in claim 9, wherein said retainer includes a minor retainer diameter. ### Claim 19 A clutch assembly, comprising: a housing having an open end and a floor, said housing defining an annular wall around a clutch axis with said wall defining a plurality of splines extending between said open end and said floor; a plurality of clutch plates received by said splines inside said housing and a ring retaining said clutch plates in said housing; a retainer disposed at said open end of said housing and defining a space with said splines, said space receiving said ring thereby securing said ring between said retainer and said splines in a substantially fixed position relative to an axis defined by said clutch assembly and retaining said clutch plates inside said housing, and said splines defining a major housing diameter and a minor housing diameter, said retainer defining a minor retainer diameter being truncated between said major housing diameter and said minor housing diameter. ### Claim 20 (depends on 19) The assembly set forth in claim 19, wherein said retainer is defined by deforming said open end of said housing radially inwardly thereby defining a space between said retainer and said splines for receiving said ring. ### Claim 21 (depends on 20) The assembly set forth in claim 20, wherein space defines a substantially continuous groove for receiving said ring. ### Claim 22 (depends on 19) The assembly set forth in claim 19, wherein said splines are spaced from said open end of said housing. ### Claim 23 (depends on 19) The assembly set forth in claim 19, wherein said retainer defines a plurality of retainer teeth extending radially inwardly from said annular wall. ### Claim 24 (depends on 23) The assembly set forth in claim 23, wherein said teeth are circumferentially aligned with said splines. ### Claim 25 (depends on 19) The assembly set forth in claim 19, wherein said retainer provides substantially continuous contact with said ring. ### Claim 26 (depends on 1) The assembly set forth in claim 1, wherein said retainer includes a major retainer diameter. ### Claim 27 (depends on 19) The assembly set forth in claim 19, wherein said retainer includes a major retainer diameter.