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1.发明授权公开(公告)号：US10760227B2
公开(公告)日：2020-09-01
申请号：US16254451
申请日：2019-01-22
申请人： Multiquip, Inc.
摘要： A support structure for a float pan for floating a concrete surface provides an interface between the float pan and a rotating machine. The support structure is characterized by a hub configured for concentric attachment to a rotor, and by trusses that extend radially from the hub, each providing a float pan contact surface and means for attachment to the float pan. Perimetric bracing links the trusses about the perimeter of the support structure. A machine similar to a walk-behind or ride-on trowel but without rotor blades, may incorporate the support structure and operate as a dedicated power flotation machine. Under weight of the machine, the contact surfaces of the trusses conform the float pan to a desired shape or radius of curvature for optimizing a flotation process.
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公开(公告)号：US10584499B2
公开(公告)日：2020-03-10
申请号：US16006787
申请日：2018-06-12
申请人： Multiquip, Inc.
IPC分类号： E04F21/24 , E01C19/42 , E01C19/40 , E04F21/16 , B60L9/26 , B60L50/61 , B60L50/13 , B60W50/00 , B60L3/00 , B60W10/08 , B60W20/13
摘要： A hybrid drive train for a self propelled power trowel includes a frame having a centerline from front to rear, an engine-generator set, a pair of rotors with trowel blades tiltably connected to the frame and positioned to support the frame above a concrete surface being finished, electric motors for driving the rotors, means for tilting each rotor toward and away from the centerline, and means for tilting a rotor fore and aft, parallel to the centerline. A rectifier and inverter in series at the engine-generator output allows engine speed to be regulated by a capacitor bank, and usage of highly efficient brushless AC synchronous motors to drive the rotors. A rechargeable battery may be connected in parallel with the capacitor bank.
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3.发明授权公开(公告)号：US11535987B2
公开(公告)日：2022-12-27
申请号：US17007931
申请日：2020-08-31
申请人： Multiquip, Inc.
摘要： A support structure for a float pan for floating a concrete surface provides an interface between the float pan and a rotating machine. The support structure is characterized by a hub configured for concentric attachment to a rotor, and by trusses that extend radially from the hub, each providing a float pan contact surface and means for attachment to the float pan. Perimetric bracing links the trusses about the perimeter of the support structure. A machine similar to a walk-behind or ride-on trowel but without rotor blades, may incorporate the support structure and operate as a dedicated power flotation machine. Under weight of the machine, the contact surfaces of the trusses conform the float pan to a desired shape or radius of curvature for optimizing a flotation process.
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公开(公告)号：US11193286B2
公开(公告)日：2021-12-07
申请号：US16752598
申请日：2020-01-24
申请人： Multiquip, Inc.
摘要： A self propelled power trowel for finishing a concrete surface is equipped with reversible rotors to allow an operator to reverse the direction of rotation of rotor blades. The trowel includes a rigid frame adapted for operation over a concrete surface, a pair of rotor assemblies having rotor blades tiltably connected to the rigid frame for frictionally contacting the concrete surface and supporting the rigid frame thereabove, a prime mover mounted to the rigid frame and operatively coupled to drive the rotor blades of the rotor assemblies in opposite rotational directions. Synchronous or hydraulic motors are configured for causing, responsive to manual controls, reversal of the direction of rotation of the rotor blades.
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公开(公告)号：US20180355624A1
公开(公告)日：2018-12-13
申请号：US16006787
申请日：2018-06-12
申请人： Multiquip, Inc.
CPC分类号： E04F21/247 , B60L3/003 , B60L9/26 , B60L50/13 , B60L50/61 , B60L2200/40 , B60L2210/42 , B60L2220/16 , B60L2220/42 , B60W10/08 , B60W20/13 , B60W2050/0008 , E01C19/40 , E01C19/42 , E04F21/161
摘要： A hybrid drive train for a self propelled power trowel includes a frame having a centerline from front to rear, an engine-generator set, a pair of rotors with trowel blades tiltably connected to the frame and positioned to support the frame above a concrete surface being finished, electric motors for driving the rotors, means for tilting each rotor toward and away from the centerline, and means for tilting a rotor fore and aft, parallel to the centerline. A rectifier and inverter in series at the engine-generator output allows engine speed to be regulated by a capacitor bank, and usage of highly efficient brushless AC synchronous motors to drive the rotors. A rechargeable battery may be connected in parallel with the capacitor bank.
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公开(公告)号：US20200263443A1
公开(公告)日：2020-08-20
申请号：US16752598
申请日：2020-01-24
申请人： Multiquip, Inc.
摘要： A self propelled power trowel for finishing a concrete surface is equipped with reversible rotors to allow an operator to reverse the direction of rotation of rotor blades. The trowel includes a rigid frame adapted for operation over a concrete surface, a pair of rotor assemblies having rotor blades tiltably connected to the rigid frame for frictionally contacting the concrete surface and supporting the rigid frame thereabove, a prime mover mounted to the rigid frame and operatively coupled to drive the rotor blades of the rotor assemblies in opposite rotational directions. Synchronous or hydraulic motors are configured for causing, responsive to manual controls, reversal of the direction of rotation of the rotor blades.
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