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公开(公告)号：US20220090397A1
公开(公告)日：2022-03-24
申请号：US17543722
申请日：2021-12-06
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：US20240093513A1
公开(公告)日：2024-03-21
申请号：US18523858
申请日：2023-11-29
申请人： Multiquip, Inc.
CPC分类号： E04F21/245 , H02P23/14 , H02P29/68 , F03D7/02
摘要： A method for thermal management of a power trowel executable by an on-board logic controller allows operation of the trowel in normal mode in which rotor speed is determined by manual control and in which a sensed temperature of the trowel lies below a high temperature setpoint. In response to the sensed temperature exceeding the high temperature setpoint, the controller switches operation of the power trowel from normal mode to thermal management mode in which a maximum rotor speed achievable by manual control is reduced by the controller in incremental steps to allow the trowel to cool. In response to the sensed temperature reaching a low temperature setpoint, the controller increases rotor speed in incremental steps, and returns operation to normal mode when a desired rotor speed is maintained for sufficient time during which the sensed temperature remains below the low temperature setpoint.
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3.发明申请公开(公告)号：US20220178089A1
公开(公告)日：2022-06-09
申请号：US17677914
申请日：2022-02-22
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 a plurality of trusses that extend radially from the hub, each providing a planar contact surface. A mounting plate attaches between each planar contact surface and a top surface of the float pan and is radially adjustable along the planar contact surface. A truss beam structure cross-links the trusses together. A. walk-behind or ride-on machine may incorporate the support structure and operate as a dedicated power flotation machine. Under weight of the machine, the planar 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：US20210180340A1
公开(公告)日：2021-06-17
申请号：US17106055
申请日：2020-11-27
申请人： Multiquip Inc.
摘要： A method for thermal management of a power trowel executable by an on-board logic controller allows operation of the trowel in normal mode in which rotor speed is determined by manual control and in which a sensed temperature of the trowel lies below a high temperature setpoint. In response to the sensed temperature exceeding the high temperature setpoint, the controller switches operation of the power trowel from normal mode to thermal management mode in which a maximum rotor speed achievable by manual control is reduced by the controller in incremental steps to allow the trowel to cool. In response to the sensed temperature reaching a low temperature setpoint, the controller increases rotor speed in incremental steps, and returns operation to normal mode when a desired rotor speed is maintained for sufficient time during which the sensed temperature remains below the low temperature setpoint.
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