Patents Assigned to Duramax Marine, LLC
-
Patent number: 10697703Abstract: A multiple-stacked marine heat exchanger for cooling at least one heat source in a marine vessel having an upper marine heat exchanger with a forward beveled end and upper coolant flow tubes connected thereto, a lower marine exchanger having a forward beveled end which converges with the forward beveled end of the upper marine heat exchanger and lower coolant flow tubes connected thereto, and an ambient water passageway extending through each pair of stacked marine heat exchangers in the multi-stacked marine heat exchanger. In one situation, the beveled ends cooperate to form a stagnant pressure region near the entrance to the ambient water passageway to create an increase in pressure at the entrance to create jets of turbulent water flowing through the passageway to break up the laminar boundary layer and increase heat transfer from the coolant flow tubes.Type: GrantFiled: December 1, 2015Date of Patent: June 30, 2020Assignee: Duramax Marine, LLCInventors: Frank E. Horvat, Joseph H. Andulics
-
Patent number: 10179637Abstract: A keel cooler assembly comprising a coolant tube including a plurality of turbulence enhancers for improving the heat transfer of the coolant without substantially increasing pressure drop of the coolant. In one embodiment, the turbulence enhancers are provided for generating turbulent wakes in the coolant for disrupting laminar boundary layers for improving heat transfer. In another embodiment, the turbulence enhancers are provided for generating and propagating turbulent vortexes in the coolant to enhance mixing of the bulk coolant for improving heat transfer. In other embodiments, turbulators, including inserts or impediments, are provided having various configurations and being arranged in predetermined patterns for enhancing turbulence of the coolant for improving keel cooler heat transfer efficiency without substantially increasing pressure drop.Type: GrantFiled: March 19, 2015Date of Patent: January 15, 2019Assignee: Duramax Marine, LLCInventors: P. Charles Miller, Jr., Frank E. Horvat
-
Publication number: 20180283793Abstract: A multiple-stacked marine heat exchanger for cooling at least one heat source in a marine vessel having an upper marine heat exchanger with a forward beveled end and upper coolant flow tubes connected thereto, a lower marine exchanger having a forward beveled end which converges with the forward beveled end of the upper marine heat exchanger and lower coolant flow tubes connected thereto, and an ambient water passageway extending through each pair of stacked marine heat exchangers in the multi-stacked marine heat exchanger. In one situation, the beveled ends cooperate to form a stagnant pressure region near the entrance to the ambient water passageway to create an increase in pressure at the entrance to create jets of turbulent water flowing through the passageway to break up the laminar boundary layer and increase heat transfer from the coolant flow tubes.Type: ApplicationFiled: December 1, 2015Publication date: October 4, 2018Applicant: Duramax Marine, LLCInventors: Frank E. Horvat, Joseph H. Andulics
-
Patent number: 9957030Abstract: A keel cooler assembly comprising a liquid coolant tube including a plurality of turbulence enhancers for improving the heat transfer of the liquid coolant without substantially increasing pressure drop of the liquid coolant. In one embodiment, the turbulence enhancers generate turbulent wakes in the liquid coolant for disrupting laminar boundary layers for improving heat transfer. In another embodiment, the turbulence enhancers generate and propagate turbulent vortexes in the liquid coolant to enhance mixing of the bulk liquid coolant for improving heat transfer. In other embodiments, turbulators, including inserts or impediments, are provided having various configurations and being arranged in predetermined patterns for enhancing turbulence of the liquid coolant for improving keel cooler heat transfer efficiency without substantially increasing pressure drop.Type: GrantFiled: October 7, 2014Date of Patent: May 1, 2018Assignee: Duramax Marine, LLCInventors: P. Charles Miller, Jr., Frank E. Horvat
-
Publication number: 20150191237Abstract: A keel cooler assembly comprising a coolant tube including a plurality of turbulence enhancers for improving the heat transfer of the coolant without substantially increasing pressure drop of the coolant. In one embodiment, the turbulence enhancers provide a means for generating turbulent wakes in the coolant for disrupting laminar boundary layers for improving heat transfer. In another embodiment, the turbulence enhancers provide a means for generating and propagating turbulent vortexes in the coolant to enhance mixing of the bulk coolant for improving heat transfer. In other embodiments, turbulators, including inserts or impediments, are provided having various configurations and being arranged in predetermined patterns for enhancing turbulence of the coolant for improving keel cooler heat transfer efficiency without substantially increasing pressure drop.Type: ApplicationFiled: March 19, 2015Publication date: July 9, 2015Applicant: Duramax Marine, LLCInventors: P. Charles Miller, JR., Frank E. Horvat
-
Publication number: 20150020996Abstract: A keel cooler assembly comprising a coolant tube including a plurality of turbulence enhancers for improving the heat transfer of the coolant without substantially increasing pressure drop of the coolant. In one embodiment, the turbulence enhancers provide a means for generating turbulent wakes in the coolant for disrupting laminar boundary layers for improving heat transfer. In another embodiment, the turbulence enhancers provide a means for generating and propagating turbulent vortexes in the coolant to enhance mixing of the bulk coolant for improving heat transfer. In other embodiments, turbulators, including inserts or impediments, are provided having various configurations and being arranged in predetermined patterns for enhancing turbulence of the coolant for improving keel cooler heat transfer efficiency without substantially increasing pressure drop.Type: ApplicationFiled: October 7, 2014Publication date: January 22, 2015Applicant: Duramax Marine, LLCInventors: P. Charles Miller, JR., Frank E. Horvat
-
Patent number: 8376029Abstract: A fluid flow diverter is provided in a standard rectangular header of a keel cooler for optimizing the coolant flow towards both the interior tubes and also towards the exterior tubes of the keel cooler. The improvement enhances the internal coolant flow and subsequent heat transfer efficiency similar to what has been realized with a non-rectangular header, for example, a header with a beveled wall.Type: GrantFiled: January 23, 2009Date of Patent: February 19, 2013Assignee: Duramax Marine, LLCInventors: Steven Rericha, Jeffrey S. Leeson, Michael W. Brakey
-
Publication number: 20090145591Abstract: A fluid flow diverter is provided in a standard rectangular header of a keel cooler for optimizing the coolant flow towards both the interior tubes and also towards the exterior tubes of the keel cooler. The improvement enhances the internal coolant flow and subsequent heat transfer efficiency similar to what has been realized with a non-rectangular header, for example, a header with a beveled wall.Type: ApplicationFiled: January 23, 2009Publication date: June 11, 2009Applicant: Duramax Marine, LLCInventors: Steven Rericha, Jeffrey S. Leeson, Michael W. Brakey
-
Patent number: 7490992Abstract: A bearing unit for holding a shaft, the bearing unit having a housing and integral lands extending inwardly from the inner surface of the housing for tangentially engaging the rotating shaft, the bearing unit being made from a slippery polymer alloy comprising a heterogeneous composition of a thermoplastic in a continuous phase, a thermoplastic rubber compound dispersed in the thermoplastic and a lubricant dispersed in the thermoplastic.Type: GrantFiled: November 2, 2007Date of Patent: February 17, 2009Assignee: Duramax Marine, LLCInventor: Roy Lee Orndorff, Jr.
-
Patent number: 7481262Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.Type: GrantFiled: April 9, 2007Date of Patent: January 27, 2009Assignee: Duramax Marine, LLCInventors: Jeffrey S. Leeson, Michael W. Brakey, P. Charles Miller, Jr.
-
Publication number: 20080063327Abstract: A bearing unit for holding a shaft, the bearing unit having a housing and integral lands extending inwardly from the inner surface of the housing for tangentially engaging the rotating shaft, the bearing unit being made from a slippery polymer alloy comprising a heterogeneous composition of a thermoplastic in a continuous phase, a thermoplastic rubber compound dispersed in the thermoplastic and a lubricant dispersed in the thermoplastic.Type: ApplicationFiled: November 2, 2007Publication date: March 13, 2008Applicant: Duramax Marine, LLC an Ohio limited-liability companyInventor: Roy Orndorff
-
Patent number: 7328740Abstract: A multiple-pass heat exchanger having opposing headers with beveled end walls, one header having nozzles on opposite sides of a separator wall for delivering heat exchange fluid at one temperature from one or more nozzles on one side of the separator wall, the heat exchanger having one set of fluid flow tubes for conveying the fluid in one direction to the other header and another set of fluid flow tubes for carrying the fluid in the opposite direction from the latter header for delivering to the header with a nozzle or nozzles for discharging the fluid from the latter header at a changed temperature. There is also disclosed a multiple systems combined heat exchanger having an opposing headers with beveled end walls, wherein at least two heat exchangers independent of each other share the respective headers which are divided from each other by separator walls.Type: GrantFiled: May 15, 2006Date of Patent: February 12, 2008Assignee: Duramax Marine, LLCInventors: Jeffrey S. Leeson, Eric K. Peoples, Michael W. Brakey
-
Patent number: 7290932Abstract: A bearing stave for use in a water-lubricated bearing having a discontinuous surface with a plurality of discrete, separated contact locations for contacting the shaft, the discontinuous surface being made of slippery polymer alloy.Type: GrantFiled: April 29, 2005Date of Patent: November 6, 2007Assignee: Duramax Marine, LLCInventor: Roy Lee Orndorff, Jr.
-
Publication number: 20070187066Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.Type: ApplicationFiled: April 9, 2007Publication date: August 16, 2007Applicant: Duramax Marine, LLC - a limited-liability corporation of the State of OhioInventors: Jeffrey Leeson, Michael Brakey, P. Miller
-
Patent number: 7201213Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.Type: GrantFiled: May 23, 2005Date of Patent: April 10, 2007Assignee: Duramax Marine, LLCInventors: Jeffrey S. Leeson, Michael W. Brakey, P. Charles Miller, Jr.
-
Publication number: 20060201652Abstract: A multiple-pass heat exchanger having opposing headers with beveled end walls, one header having nozzles on opposite sides of a separator wall for delivering heat exchange fluid at one temperature from one or more nozzles on one side of the separator wall, the heat exchanger having one set of fluid flow tubes for conveying the fluid in one direction to the other header and another set of fluid flow tubes for carrying the fluid in the opposite direction from the latter header for delivering to the header with a nozzle or nozzles for discharging the fluid from the latter header at a changed temperature. There is also disclosed a multiple systems combined heat exchanger having an opposing headers with beveled end walls, wherein at least two heat exchangers independent of each other share the respective headers which are divided from each other by separator walls.Type: ApplicationFiled: May 15, 2006Publication date: September 14, 2006Applicant: Duramax Marine, LLCInventors: Jeffrey Leeson, Eric Peoples, Michael Brakey
-
Patent number: 7044194Abstract: A header for a heat exchanger, the header having a beveled closed end portion.Type: GrantFiled: April 9, 2002Date of Patent: May 16, 2006Assignee: Duramax Marine, LLCInventors: Jeffrey S. Leeson, Eric K. Peoples, Michael W. Brakey
-
Patent number: 6921206Abstract: A bearing stave for use in a water lubricated bearing having a discontinuous surface with a plurality of discrete, separated contact locations for contacting the shaft, the discontinuous surface being made of slippery polymer alloy.Type: GrantFiled: May 13, 2003Date of Patent: July 26, 2005Assignee: Duramax Marine, LLCInventor: Roy Lee Orndorff, Jr.
-
Patent number: 6896037Abstract: A keel cooler having a standard header with an internal beveled bottom wall, with orifices on the inner wall of the exterior tubes extending into the header, the orifices being in the natural flow path of the coolant flow. The orifices are sufficiently large so as not to restrict the flow of coolant. A fluid flow diverter is additionally provided in the header of the keel cooler for facilitating coolant flow towards both the interior tubes and also towards the exterior tubes.Type: GrantFiled: October 29, 2002Date of Patent: May 24, 2005Assignee: Duramax Marine, LLCInventors: Jeffrey S. Leeson, Michael W. Brakey, P. Charles Miller, Jr.
-
Patent number: 6866271Abstract: A sealing device for use with a drive shaft of a water vessel. The sealing device comprises a housing for a seal and bearing, a compression ring, a lip seal flange attachment and a diaphragm for tracking the movement of the shaft. The diaphragm is made of a resilient, flexible material and is operatively connected to the seal housing. In operation, the diaphragm tracks the motion of the drive shaft so that the drive shaft may move freely in the hull of the vessel. The diaphragm allows the rigid seal housing to also move in response to any axial, lateral or circular-axial (wobble-like) movement of the shaft so that a constant seal around the shaft is provided.Type: GrantFiled: February 5, 2003Date of Patent: March 15, 2005Assignee: Duramax Marine, LLCInventor: George MacDonald