Patents by Inventor Derrick R. Camenga
Derrick R. Camenga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11570948Abstract: Outdoor power equipment includes a frame, a power head, a hydrostatic transmission, a pair of rear drive wheels, a drive chain, and a wheel height adjustment mechanism. The hydrostatic transmission includes a drive gear configured to rotate about a first axis. The pair of rear drive wheels are coupled at respective ends of a rear drive axle, wherein the rear drive axle is operably coupled to a driven gear. The pair of rear drive wheels, the rear drive axle, and the driven gear are configured to rotate about a second axis. The drive chain is operably coupled to both the drive gear and the driven gear. The wheel height adjustment mechanism includes a first bell crank pivotally coupled to the frame about the first axis, with a first end of the first bell crank being coupled to the rear drive axle.Type: GrantFiled: August 23, 2019Date of Patent: February 7, 2023Assignee: Briggs & Stratton, LLCInventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Publication number: 20230018540Abstract: A lawnmower includes a frame, a pair of drive wheels, a front axle assembly, a first caster wheel, a second caster wheel, a first rod, a second rod, and a mower deck. The pair of drive wheels are coupled to a second end portion of the frame. The front axle assembly includes a bar pivotally coupled to a first end portion of the frame about a pivot axis. The first caster wheel is coupled to a first lateral end of the bar. The second caster wheel is coupled to a second lateral end of the bar. The first rod is coupled between the frame and the first lateral end of the bar. The second rod is coupled between the frame and the second lateral end of the bar. When the bar pivots about the pivot axis, the first caster wheel and the second caster wheel move relative to the frame.Type: ApplicationFiled: September 28, 2022Publication date: January 19, 2023Applicant: Briggs & Stratton, LLCInventors: Philip H. Wenzel, Robert S. Laurin, E. Mark Lynch, Brian Crossway, Derrick R. Camenga
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Publication number: 20220377976Abstract: Outdoor power equipment includes a frame, a power head, a transmission, a pair of rear drive wheels, and a wheel height adjustment mechanism. The power head is coupled to the frame. The transmission is coupled to the frame and operatively coupled to the power head. The transmission includes a drive rotatable member configured to rotate about a first axis. The pair of rear drive wheels are coupled at respective ends of a rear drive axle so that the rear drive axle, and the pair of rear drive wheels coupled thereto, rotate about a second axis different than the first axis. The wheel height adjustment mechanism includes a first bell crank pivotally coupled to the frame about the first axis. A first end of the first bell crank is coupled to the rear drive axle.Type: ApplicationFiled: August 9, 2022Publication date: December 1, 2022Applicant: Briggs & Stratton, LLCInventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Patent number: 11470773Abstract: A zero turn radius lawnmower, such as a stand-on lawnmower, including a main frame having a first end portion and a second end portion, a pair of drive wheels operably coupled to the second end portion of the main frame and configured to be driven independently in both forward and reverse directions, and a front axle assembly pivotally coupled to the first end portion of the main frame about a single axis. The zero turn radius lawnmower also includes a pair of caster wheels coupled to respective ends of the front axle assembly such that the pair of caster wheels are able to move relative to the main frame, as well as a mower deck coupled to the main frame by at least one first linkage and coupled to the front axle assembly by at least one second linkage.Type: GrantFiled: August 2, 2018Date of Patent: October 18, 2022Assignee: Briggs & Stratton, LLCInventors: Philip H. Wenzel, Robert S. Laurin, E. Mark Lynch, Brian Crossway, Derrick R. Camenga
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Publication number: 20210386019Abstract: A standing ride on mower includes a frame, a right drive wheel, a left drive wheel, a prime mover, a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel and having a housing, hydraulic pump, and hydraulic motor, a left side integrated transaxle operating under influence of the prime mover to drive rotation of the left drive wheel, having a housing, hydraulic pump, and hydraulic motor, and an operator platform to support a standing operator of the mower extending beneath the left housing and beneath the right housing such that a distance between an innermost portion of the right side integrated transaxle and an innermost portion of the left side integrated transaxle is less than a width of the operator platform.Type: ApplicationFiled: August 30, 2021Publication date: December 16, 2021Applicant: Briggs & Stratton, LLCInventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Patent number: 11102929Abstract: A standing ride on mower includes a frame, a right drive wheel, a left drive wheel, a prime mover, a cutting deck assembly, a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right side housing, a right hydraulic pump within the housing, and a right hydraulic motor within the housing, a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left side housing, a left hydraulic pump within the housing, and a left hydraulic motor within the housing, and an operator platform to support a standing operator of the mower. The operator platform extends beneath the left housing and beneath the right housing.Type: GrantFiled: September 17, 2018Date of Patent: August 31, 2021Assignee: Briggs & Stratton, LLCInventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Publication number: 20200068802Abstract: An outdoor power equipment unit such as, e.g., a walk-behind lawnmower including a frame, a power head, and a hydrostatic transmission, wherein the hydrostatic transmission includes a drive gear configured to rotate about a first axis. The unit also includes a pair of rear drive wheels coupled at respective ends of a rear drive axle, wherein the rear drive axle is operably coupled to a driven gear. The pair of rear drive wheels, the rear drive axle, and the driven gear are configured to rotate about a second axis. A drive chain is operably coupled to both the drive gear and the driven gear. Furthermore, a wheel height adjustment mechanism is provided, wherein the wheel height adjustment mechanism includes a first bell crank pivotally coupled to the frame about the first axis, with a first end of the first bell crank being coupled to the rear drive axle. A control assembly for controlling the speed and direction of the outdoor power equipment unit is also disclosed.Type: ApplicationFiled: August 23, 2019Publication date: March 5, 2020Inventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Publication number: 20190037769Abstract: A zero turn radius lawnmower, such as a stand-on lawnmower, including a main frame having a first end portion and a second end portion, a pair of drive wheels operably coupled to the second end portion of the main frame and configured to be driven independently in both forward and reverse directions, and a front axle assembly pivotally coupled to the first end portion of the main frame about a single axis. The zero turn radius lawnmower also includes a pair of caster wheels coupled to respective ends of the front axle assembly such that the pair of caster wheels are able to move relative to the main frame, as well as a mower deck coupled to the main frame by at least one first linkage and coupled to the front axle assembly by at least one second linkage.Type: ApplicationFiled: August 2, 2018Publication date: February 7, 2019Inventors: Philip H. Wenzel, Robert S. Laurin, E. Mark Lynch, Brian Crossway, Derrick R. Camenga
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Publication number: 20190014721Abstract: A standing ride on mower includes a frame, a right drive wheel, a left drive wheel, a prime mover, a cutting deck assembly, a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right side housing, a right hydraulic pump within the housing, and a right hydraulic motor within the housing, a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left side housing, a left hydraulic pump within the housing, and a left hydraulic motor within the housing, and an operator platform to support a standing operator of the mower. The operator platform extends beneath the left housing and beneath the right housing.Type: ApplicationFiled: September 17, 2018Publication date: January 17, 2019Inventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Patent number: 10091936Abstract: A standing ride on mower comprises a frame; a right drive wheel supporting the frame; a left drive wheel supporting the frame; a prime mover supported by the frame; a cutting deck assembly supported by the frame, the cutting deck assembly comprising a cutting deck at least one cutting blade mounted under the cutting deck and rotatable under influence of the prime mover; a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right side housing, a right hydraulic pump within the housing, and a right hydraulic motor within the housing; a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left side housing, a left hydraulic pump within the housing, and a left hydraulic motor within the housing; and an operator platform to support a standing operator of the mower.Type: GrantFiled: December 1, 2015Date of Patent: October 9, 2018Assignee: Briggs & Stratton CorporationInventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Publication number: 20160152262Abstract: A standing ride on mower comprises a frame; a right drive wheel supporting the frame; a left drive wheel supporting the frame; a prime mover supported by the frame; a cutting deck assembly supported by the frame, the cutting deck assembly comprising a cutting deck at least one cutting blade mounted under the cutting deck and rotatable under influence of the prime mover; a right side integrated transaxle operating under influence of the prime mover to drive rotation of the right drive wheel, the right side integrated transaxle including a right side housing, a right hydraulic pump within the housing, and a right hydraulic motor within the housing; a left side integrated transaxle operating under the influence of the prime mover to drive rotation of the left drive wheel, the left side integrated transaxle including a left side housing, a left hydraulic pump within the housing, and a left hydraulic motor within the housing; and an operator platform to support a standing operator of the mower.Type: ApplicationFiled: December 1, 2015Publication date: June 2, 2016Inventors: Robert S. Laurin, E. Mark Lynch, Derrick R. Camenga
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Patent number: 8220577Abstract: Some embodiments of the invention provide outdoor power equipment including a frame, a seat and at least one leg support angled from a horizontal plane. The outdoor power equipment can include one or more handles, a suspension unit coupled between the frame and the seat. In some embodiments, the seat can be declined with respect to a horizontal plane so that the operator's upper torso leans forward at an angle with respect to a vertical plane when the operator is sitting on the seat.Type: GrantFiled: September 7, 2011Date of Patent: July 17, 2012Assignee: Briggs & Stratton CorporationInventors: James F. Marshall, Matthew R. Hatch, Derrick R. Camenga, Joshua S. Williams, William J. Decker
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Publication number: 20110316315Abstract: Some embodiments of the invention provide outdoor power equipment including a frame, a seat and at least one leg support angled from a horizontal plane. The outdoor power equipment can include one or more handles, a suspension unit coupled between the frame and the seat. In some embodiments, the seat can be declined with respect to a horizontal plane so that the operator's upper torso leans forward at an angle with respect to a vertical plane when the operator is sitting on the seat.Type: ApplicationFiled: September 7, 2011Publication date: December 29, 2011Inventors: James F. Marshall, Matthew R. Hatch, Derrick R. Camenga, Joshua S. Williams, William J. Decker
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Patent number: 8033354Abstract: Some embodiments of the invention provide outdoor power equipment including a frame, a seat and at least one leg support angled from a horizontal plane. The outdoor power equipment can include one or more handles, a suspension unit coupled between the frame and the seat. In some embodiments, the seat can be declined with respect to a horizontal plane so that the operator's upper torso leans forward at an angle with respect to a vertical plane when the operator is sitting on the seat.Type: GrantFiled: April 11, 2011Date of Patent: October 11, 2011Assignee: Briggs & Stratton CorporationInventors: James F. Marshall, Matthew R. Hatch, Derrick R. Camenga, Joshua S. Williams, William J. Decker
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Publication number: 20110185692Abstract: Some embodiments of the invention provide outdoor power equipment including a frame, a seat and at least one leg support angled from a horizontal plane. The outdoor power equipment can include one or more handles, a suspension unit coupled between the frame and the seat. In some embodiments, the seat can be declined with respect to a horizontal plane so that the operator's upper torso leans forward at an angle with respect to a vertical plane when the operator is sitting on the seat.Type: ApplicationFiled: April 11, 2011Publication date: August 4, 2011Inventors: James F. Marshall, Matthew R. Hatch, Derrick R. Camenga, Joshua S. Williams, William J. Decker
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Patent number: 7942224Abstract: Embodiments of the invention provide a lawn mower including a frame, a seat or operator station, one or more handles, and a suspension unit coupled between the frame and the seat or operator station. The lawn mower can include one or more pivot members with a first portion coupled to the frame at a pivot location forward of the seat or operator station and a second portion coupled to the seat or operator station. The one or more pivot members can allow the seat or operator station and the one or more handles to move with respect to the frame while the suspension unit absorbs a portion of shock caused by riding over the uneven terrain. The seat can be positioned at least partially between a first drive wheel and a second drive wheel and at least partially along a drive axis. The seat can be declined with respect to a horizontal plane so that the operator's upper torso leans forward at an angle with respect to a vertical plane when the operator is sitting on the seat.Type: GrantFiled: June 16, 2008Date of Patent: May 17, 2011Assignee: Briggs & Stratton CorporationInventors: James F. Marshall, Matthew R. Hatch, Derrick R. Camenga, Joshua S. Williams, William J. Decker
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Publication number: 20090308039Abstract: Embodiments of the invention provide a lawn mower including a frame, a seat or operator station, one or more handles, and a suspension unit coupled between the frame and the seat or operator station. The lawn mower can include one or more pivot members with a first portion coupled to the frame at a pivot location forward of the seat or operator station and a second portion coupled to the seat or operator station. The one or more pivot members can allow the seat or operator station and the one or more handles to move with respect to the frame while the suspension unit absorbs a portion of shock caused by riding over the uneven terrain. The seat can be positioned at least partially between a first drive wheel and a second drive wheel and at least partially along a drive axis. The seat can be declined with respect to a horizontal plane so that the operator's upper torso leans forward at an angle with respect to a vertical plane when the operator is sitting on the seat.Type: ApplicationFiled: June 16, 2008Publication date: December 17, 2009Inventors: James F. Marshall, Matthew R. Hatch, Derrick R. Camenga, Joshua S. Williams, William J. Decker