IP Library › Granted Patent US 12,304,609
Granted Patent B2
US 12,304,609 · App. 18/123,468 · Granted May 20, 2025

Stern drives and transom bracket assemblies for stern drives providing vibration isolation

Inventors: John A. Groeschel (Theresa, WI); Chetan Avinash Dharmadhikari (Brookfield, WI)
Assignee: Brunswick Corporation
B63H21/305B63H21/14
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Quick Facts
Patent No.
US 12,304,609
App. No.
18/123,468
Granted
May 20, 2025
Kind
B2
Abstract

A stern drive for a marine vessel having a transom. The stern drive has a drive assembly comprising a drive unit configured to generate a thrust force in water and a powerhead configured to power the drive unit, and a transom bracket assembly configured to support the drive unit outside of the transom and further configured to support the powerhead inside of the transom, wherein the transom bracket assembly is configured to vibrationally isolate the drive unit and powerhead relative to the transom.

Claims (25)

1. A transom bracket assembly for mounting a stern drive to a transom of a marine vessel, the transom bracket assembly comprising:

an inner clamp bracket and an outer clamp bracket that are configured to clamp on opposite sides of the transom,

a transom housing that is supported by the inner clamp bracket and outer clamp bracket and configured to support a drive unit of the stern drive outside of the marine vessel and a powerhead of the stern drive inside of the marine vessel,

a vibrational dampener that elastically supports the transom housing between the inner clamp bracket and the outer clamp bracket, and

a plurality of elastomeric mounts that elastically suspends the transom housing from the inner clamp bracket.

2. The transom bracket assembly according to claim 1 , wherein the vibrational dampener is positioned between the inner clamp bracket and the outer clamp bracket and wherein the plurality of elastomeric mounts is on the inner clamp bracket.

3. The transom bracket assembly according to claim 1 , wherein the plurality of elastomeric mounts is spaced apart on the inner clamp bracket.

4. The transom bracket assembly according to claim 1 , wherein the plurality of elastic mounts comprises at least two elastomeric mounts that are located on a port side of the inner clamp bracket and at least two elastomeric mounts that are located on a starboard side of the inner clamp bracket.

5. The transom bracket assembly according to claim 4 , wherein the at least two elastomeric mounts that are located on the port side of the inner clamp bracket are aligned with the at least two elastomeric mounts that are located on the starboard side of the inner clamp bracket.

6. The transom bracket assembly according to claim 1 , wherein each of the plurality of elastomeric mounts comprises an outer shell and an elastomeric spacer.

7. The transom bracket assembly according to claim 6 , wherein each of the plurality of elastomeric mounts comprises a fastener that extends through the elastomeric spacer and fastens the inner clamp bracket to the transom housing.

8. The transom bracket assembly according to claim 7 , wherein each of the plurality of elastomeric mounts comprises a mounting hard point through which the fastener extends.

9. The transom bracket assembly according to claim 6 , wherein the elastomeric spacer is cylindrical.

10. The transom bracket assembly according to claim 1 , wherein the vibrational dampener is sandwiched between the transom housing and at least one of the inner clamp bracket and the outer clamp bracket.

11. The transom bracket assembly according to claim 1 , wherein the vibrational dampener provides a seal configured to prevent water intrusion into the marine vessel.

12. The transom bracket assembly according to claim 1 , wherein the vibrational dampener includes an annular seal configured to prevent water intrusion into the marine vessel.

13. The transom bracket assembly according to claim 12 , wherein the annular seal comprises a groove that extends along a perimeter of the annular seal and is mated with a locating protrusion on at least one of the inner clamp bracket and the outer clamp bracket.

14. The transom bracket assembly according to claim 1 , wherein the vibrational dampener comprises an annular monolithic dual O-ring seal.

15. The transom bracket assembly according to claim 1 , wherein the vibrational dampener comprises an annular member having a cross-section that varies along a length of the annular member.

16. The transom bracket assembly according to claim 1 , wherein the vibrational dampener is adhered to the transom bracket assembly.

17. A transom bracket assembly for mounting a stern drive to a transom of a marine vessel, the transom bracket assembly comprising:

an inner clamp bracket and an outer clamp bracket that are configured to clamp on opposite sides of the transom,

a transom housing for positioning in an opening through the transom, the transom housing configured to support a drive unit of the stern drive outside the marine vessel and a powerhead of the stern drive inside the marine vessel,

an outer vibrational dampener that elastically supports the transom housing in the opening relative to the inner clamp bracket and the outer clamp bracket, and

an inner vibrational dampener that elastically suspends the transom housing from the inner clamp bracket, wherein the inner vibrational dampener comprises a plurality of elastomeric mounts that is spaced apart on the inner clamp bracket.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 14, 2023
From: GROESCHEL, JOHN A.; DHARMADHIKARI, CHETAN AVINASH
To: BRUNSWICK CORPORATION
Reel/Frame 063322/0510 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 20, 2023
From: GROESCHEL, JOHN A.; DHARMADHIKARI, CHETAN AVINASH
To: BRUNSWICK CORPORATION
Reel/Frame 063035/0204 →
Continuity (2)
Provisional Application 63324251 · Mar 28, 2022
Related Publication 20230303231A1 · Sep 28, 2023
References Cited (137)
US 1161935A · Heck · 1915 [cited by applicant]
US 1774956A · Wilson · 1930 [cited by applicant]
US 2372247A · Pemberton · 1945 [cited by applicant]
US 2384436A · Bossen · 1945 [cited by applicant]
US 2536894A · Wanzer · 1951 [cited by applicant]
US 2549481A · Kiekhaefer · 1951 [cited by applicant]
US 2688299A · Gload et al. · 1954 [cited by applicant]
US 2732819A · Irgens · 1956 [cited by applicant]
US 2804838A · Moser · 1957 [cited by applicant]
US 2877733A · Harris · 1959 [cited by applicant]
US 2902967A · Wanzer · 1959 [cited by applicant]
US 3021725A · Schneider · 1962 [cited by applicant]
US 3084657A · Kiekhaefer · 1963 [cited by applicant]
US 3094967A · Willis · 1963 [cited by applicant]
US 3164122A · Morris · 1965 [cited by applicant]
US 3171382A · Bergstedt · 1965 [cited by applicant]
US 3285221A · North · 1966 [cited by applicant]
US 3310021A · Shimanckas · 1967 [cited by applicant]
US 3376842A · Wynne · 1968 [cited by applicant]
US 3404586A · Fanstone · 1968 [cited by applicant]
US 3483843A · Hawthorne · 1969 [cited by applicant]
US 3486478A · Halliday · 1969 [cited by applicant]
US 3548775A · Hammond et al. · 1970 [cited by applicant]
US 3707939A · Berg · 1973 [cited by applicant]
US 3738306A · Pinkerton · 1973 [cited by applicant]
US 3756188A · Smith · 1973 [cited by applicant]
US 3795219A · Peterson · 1974 [cited by applicant]
US 3841257A · Strang · 1974 [cited by applicant]
US 3881443A · Hump · 1975 [cited by applicant]
US 3896757A · Kucher · 1975 [cited by applicant]
US 3930436A · Hedenberg · 1976 [cited by applicant]
US 3946698A · LaFollette et al. · 1976 [cited by applicant]
US 3982496A · Blanchard · 1976 [cited by examiner]
US 4276034A · Kashmerick · 1981 [cited by applicant]
US 4297097A · Kiekhaefer · 1981 [cited by applicant]
US 4323354A · Blanchard · 1982 [cited by applicant]
US 4343612A · Blanchard · 1982 [cited by applicant]
US 4371348A · Blanchard · 1983 [cited by applicant]
US 4418633A · Krautkremer et al. · 1983 [cited by applicant]
US 4432737A · Johansson · 1984 [cited by applicant]
US 4619548A · Kazaoka et al. · 1986 [cited by applicant]
US 4668195A · Smith · 1987 [cited by applicant]
US 4747795A · Kawamura et al. · 1988 [cited by applicant]
US 4887982A · Newman et al. · 1989 [cited by applicant]
US 4907994A · Jones · 1990 [cited by applicant]
US 4911666A · Gage et al. · 1990 [cited by applicant]
US 4932907A · Newman et al. · 1990 [cited by applicant]
US 5024639A · Crispo · 1991 [cited by applicant]
US 5108325A · Livingston et al. · 1992 [cited by applicant]
US 5112256A · Clement · 1992 [cited by applicant]
US 5224888A · Fujimoto et al. · 1993 [cited by applicant]
US 5280708A · Sougawa et al. · 1994 [cited by applicant]
US 5463990A · Rush, II et al. · 1995 [cited by applicant]
US 5465633A · Bernloehr et al. · 1995 [cited by applicant]
US 5480330A · Brown · 1996 [cited by applicant]
US 5487687A · Idzikowski et al. · 1996 [cited by applicant]
US 5522744A · Schlogel · 1996 [cited by applicant]
US 5540606A · Strayhorn · 1996 [cited by applicant]
US 5660571A · Nakayasu et al. · 1997 [cited by applicant]
US 5674099A · Muramatsu et al. · 1997 [cited by applicant]
US 5711742A · Leinonen et al. · 1998 [cited by applicant]
US 5743774A · Adachi et al. · 1998 [cited by applicant]
US 6146220A · Alby et al. · 2000 [cited by applicant]
US 6183321B1 · Alby et al. · 2001 [cited by applicant]
US 6273771B1 · Buckley et al. · 2001 [cited by applicant]
US 6276977B1 · Treinen et al. · 2001 [cited by applicant]
US 6286845B1 · Lin · 2001 [cited by applicant]
US 6287159B1 · Polakowski et al. · 2001 [cited by applicant]
US 6402577B1 · Treinen et al. · 2002 [cited by applicant]
US 6431928B1 · Aarnivuo · 2002 [cited by applicant]
US 6544085B1 · Menard et al. · 2003 [cited by applicant]
US 6554083B1 · Kerstetter · 2003 [cited by applicant]
US 6609939B1 · Towner et al. · 2003 [cited by applicant]
US 7163427B1 · Lee · 2007 [cited by applicant]
US 7244152B1 · Uppgard · 2007 [cited by applicant]
US 7267587B2 · Oguma et al. · 2007 [cited by applicant]
US 7290638B2 · Shiino et al. · 2007 [cited by applicant]
US 7347753B1 · Caldwell et al. · 2008 [cited by applicant]
US 7387556B1 · Davis · 2008 [cited by applicant]
US 7517262B2 · Mizutani · 2009 [cited by applicant]
US 7527537B2 · Mizutani · 2009 [cited by applicant]
US 7588473B2 · Beachy Head · 2009 [cited by applicant]
US 7641527B1 · Balaji et al. · 2010 [cited by applicant]
US 7662005B2 · Provost · 2010 [cited by applicant]
US 7699674B1 · Wald et al. · 2010 [cited by applicant]
US 7794295B2 · Beachy Head · 2010 [cited by applicant]
US 7871302B2 · Provost · 2011 [cited by applicant]
US 7886678B2 · Mizutani · 2011 [cited by applicant]
US 7896304B1 · Eichinger et al. · 2011 [cited by applicant]
US 8118630B2 · Konakawa et al. · 2012 [cited by applicant]
US 8118701B2 · Okabe et al. · 2012 [cited by applicant]
US 8142247B2 · Konakawa et al. · 2012 [cited by applicant]
US 8157694B2 · Nakamura et al. · 2012 [cited by applicant]
US 8246398B2 · Inaba · 2012 [cited by applicant]
US 8246399B2 · Inaba · 2012 [cited by applicant]
US 8327789B2 · Emch · 2012 [cited by applicant]
US 8425373B2 · Okabe et al. · 2013 [cited by applicant]
US 8485854B2 · Gallato et al. · 2013 [cited by applicant]
US 8651904B2 · Pellegrinetti et al. · 2014 [cited by applicant]
US 8690616B2 · Grassi et al. · 2014 [cited by applicant]
US 8715021B2 · Horkko et al. · 2014 [cited by applicant]
US 8795011B2 · Takase et al. · 2014 [cited by applicant]
US 8808045B2 · Lundqvist et al. · 2014 [cited by applicant]
US 8821140B2 · Paval · 2014 [cited by examiner]
US 9205906B1 · Eichinger · 2015 [cited by applicant]
US 9233743B2 · Daikoku et al. · 2016 [cited by applicant]
US 9296458B2 · Saruwatari et al. · 2016 [cited by applicant]
US 9334034B1 · Waldvogel et al. · 2016 [cited by applicant]
US 9446828B1 · Groeschel · 2016 [cited by examiner]
US 9475560B1 · Jaszewski et al. · 2016 [cited by applicant]
US 9776700B2 · Beachy Head · 2017 [cited by applicant]
US 9809289B2 · Nutt et al. · 2017 [cited by applicant]
US 9849957B1 · Grahl et al. · 2017 [cited by applicant]
US 9896175B2 · Galletta, Jr. · 2018 [cited by applicant]
US 10215278B1 · Techscherer et al. · 2019 [cited by applicant]
US 10315747B1 · Jaszewski et al. · 2019 [cited by applicant]
US 10392091B2 · Galletta, Jr. · 2019 [cited by applicant]
US 10518858B1 · Klawitter et al. · 2019 [cited by applicant]
US 10752328B1 · Bielefeld et al. · 2020 [cited by applicant]
US 10800502B1 · Alby et al. · 2020 [cited by applicant]
US 11068297B2 · Galletta, Jr. · 2021 [cited by applicant]
US 11130554B1 · Alby et al. · 2021 [cited by applicant]
US 11292568B2 · Galletta, Jr. · 2022 [cited by applicant]
US 20070004294A1 · Mansfield et al. · 2007 [cited by applicant]
US 20130045648A1 · Kinpara et al. · 2013 [cited by applicant]
US 20210339839A1 · Galletta, Jr. · 2021 [cited by applicant]
CA 1317165 · 1993 [cited by applicant]
CN 101475050 · 2009 [cited by applicant]
GB 364207 · 1932 [cited by applicant]
JP 6004958 · 2016 [cited by applicant]
WO WO2007020906 · 2007 [cited by applicant]
WO WO2017223240 · 2017 [cited by applicant]
Extended European Search Report for EP 23164747.0 dated Aug. 30, 2023. [cited by applicant]
NTN, Tri-Ball Joint, Constant Velocity Joints (Small and Medium size). CAT. No. 5602-V/E. Available online from URL: https://www.ntnglobal.com/en/products/catalog/en/5602/index.html. [cited by applicant]
NTN, Constant Velocity Joints for Industrial Machines: Application Examples. CAT.No.5604/E. Available online from URL: https://www.ntnglobal.com/en/products/catalog/en/5602/index.html. [cited by applicant]
NTN, Constant Velocity Joints for industrial machines. CAT. No. 5603-V/E. Available online from URL: https://www.ntnglobal.com/en/products/catalog/en/5602/index.html. [cited by applicant]
Extended European Search Report for European Patent Application No. 23 164754.6, dated Sep. 19, 2023. [cited by applicant]