# US 5,701,634 A · Grommet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,701,634 A - Document ID: US5701634A - Status: Granted - Kind: A - Application number: 08/695,859 - Filed: 1996-08-09 - Granted: 1997-12-30 - Earliest claimed: 1996-08-09 - Assignees: Sumitomo Wiring Systems, Ltd. - Inventors: Kazuhiro Uemura; Koji Yamashita - Web page: https://patentgrep.com/patent/US5701634A ## CPC - F16L 5/10: by using sealing rings or sleeves only - B60R 16/0222: {Grommets} - F16L 41/088: {fixed using an elastic grommet between the extremity of the tube and the wall} - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR ## Abstract A grommet (1) is provided for sealing an opening in a panel, through which at least one cable passes, comprising a tapered hollow body which sealingly engages the cable at least at a first end (10) and the edge of the opening via a groove (30) formed on a second end (20), wherein at least one means for reducing stiffness, in particular a recess (12, 14, 16) is provided on an inner surface (5) and/or on an outer surface (6) of the hollow body, so that elastic deformation of the grommet (1), in particular of its second end (2) is facilitated. ## Claims ### Claim 1 A grommet (1) for sealing an opening in a panel, through which at least one cable passes, said grommet (1) comprising a tapered hollow body having an inner surface (5), an outer surface (6), a first end (10) which sealingly engages the cable and a second end (20), a groove (30) formed in the outer surface (6) in proximity to the second end (20), said groove (30) being dimensioned such that portions of the outer surface (6) adjacent said groove (30) are engageable with portions of said panel adjacent said opening, wherein at least one stiffness reducing means for reducing stiffness and facilitating inward deformation of the second end (12, 14, 16) is provided on the hollow body, said stiffness reducing means (12, 13, 14) comprising at least one recess extending at least partly around said hollow body in proximity to said groove (30), said hollow body defining a thickness at said recess which is less than thicknesses of said hollow body at locations immediately adjacent said recess so that elastic deformation of the second end (20) of the grommet (1) is facilitated. ### Claim 2 (depends on 1) A grommet (1) according to claim 1, wherein the said at least one recess (12, 14, 16) is formed on said inner surface (5). ### Claim 3 (depends on 2) A grommet (1) according to claim 2, wherein said at least one recess (12, 16) is disposed between said groove (30) and one of said first and second ends (10, 20) of said hollow body. ### Claim 4 (depends on 2) A grommet (1) according to claim 2, wherein said at least one recess (14) is at a location on said inner surface (5) substantially aligned with said groove (30). ### Claim 5 (depends on 1) A grommet (1) according to claim 1, wherein said at least one recess (12, 14, 16) extends continuously around the hollow body. ### Claim 6 (depends on 1) A grommet (1) according to claim 1, wherein said stiffness reducing means further comprises a material that is less stiff than said hollow body. ### Claim 7 (depends on 1) A grommet (1) according to claim 1, wherein the groove (30) has its largest width at the bottom. ### Claim 8 (depends on 1) A grommet (1) according to claim 1, wherein the groove (30) is defined by edges (34, 36), said edges of the groove (30) being shaped to form sealing lips. ### Claim 9 (depends on 1) A grommet (1) according to claim 1, wherein a radial projection (32) defining a sealing lip is formed on a portion of the groove (30). ### Claim 10 (depends on 1) A grommet (1) according to claim 1, wherein the hollow body includes a tapered portion radially extending therefrom in proximity to both the second end (20) and the groove (30), said tapered portion being easily deformable for sealing engagement with the panel. ### Claim 11 (depends on 10) A grommet (1) according to claim 10, wherein said easily deformable portion of said hollow body in proximity to both said second end (20) and said groove (30) is of substantially wave-shape. ### Claim 12 A grommet (1) for sealing an opening in a panel through which at least one cable may pass, said grommet comprising a tapering hollow body having an inner surface (5) and an outer surface (6), said hollow body further having a cross-sectionally small first end (10) dimensioned such that portions of said inner surface (5) adjacent said first end are sealingly engageable with said cable, said hollow body further having a cross-sectionally large second end (20), a groove (30) formed on portions of said outer surface (6) substantially adjacent said second end (20), said second end (20) and said groove (30) being dimensioned for sealing engagement with said panel adjacent said opening therein, said inner surface (5) of said hollow body being formed with at least one recess (12, 14, 16), said hollow body defining a thickness at said at least one recess which is less than thicknesses of said hollow body at locations immediately adjacent said recess for substantially reducing stiffness of said hollow body at said recess for facilitating deformation of hollow body during engagement of said grommet with said panel. ### Claim 13 (depends on 12) A grommet (1) according to claim 12, wherein said at least one recess is disposed between said groove (30) and said second end (20). ### Claim 14 (depends on 12) A grommet (1) according to claim 12, wherein said at least one recess is disposed between said groove (30) and said first end (10). ### Claim 15 (depends on 12) A grommet (1) according to claim 12, wherein said at least one recess (14) is aligned with a portion of said groove (30). ### Claim 16 (depends on 12) A grommet (1) according to claim 12, wherein said at least one recess comprises a first recess disposed between said groove (30) and said second end (20) and a second recess disposed between said groove (30) and said first end (10). ### Claim 17 (depends on 12) A grommet (1) according to claim 12, wherein said outer surface (6) includes at least one sealing lip (32) for sealingly engaging said panel adjacent said opening therein. ### Claim 18 (depends on 17) A grommet (1) according to claim 17, wherein said sealing lip (32) is disposed within said groove (30). ### Claim 19 A grommet (1) for sealing an opening in a panel through which at least one cable may pass, said grommet comprising a tapering hollow body having an inner surface (5) and an outer surface (6), said hollow body further having a cross-sectionally small first end (10) dimensioned such that portions of said inner surface (5) adjacent said first end are sealingly engageable with said cable, said hollow body further having a cross-sectionally large second end (20), a groove (30) formed on portions of said outer surface (6) substantially adjacent said second end (20), said second end (20) and said groove (30) being dimensioned for sealing engagement with said panel adjacent said opening therein, said inner surface (5) of said hollow body being formed with at least one recess (12, 14, 16) for substantially reducing stiffness of said hollow body for facilitating engagement of said grommet with said panel, wherein said hollow body is unitarily formed from a material having a selected stiffness and wherein said grommet (1) further comprises a material (12') disposed in said at least one recess (12, 14, 16) and exhibiting a stiffness less than said hollow body. ### Claim 20 (depends on 1) A grommet (1) according to claim 1, wherein said at least one recess (12, 14, 16) is closer to the second end (20) of said hollow body than to the first end (10) thereof.