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Patent Searching and Data


Title:
HYBRID DRIVE TRAIN FOR SELF PROPELLED POWER TROWEL
Document Type and Number:
WIPO Patent Application WO/2018/231881
Kind Code:
A3
Abstract:
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.

Inventors:
DEL REAL ERICK M (US)
CHAPPLE LARRY JAKE (US)
BATEMAN NATHANIEL CODY (US)
DAVIS JEFFREY KEVIN (US)
Application Number:
US2018/037173
Publication Date:
January 24, 2019
Filing Date:
June 12, 2018
Export Citation:
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Assignee:
MULTIQUIP INC (US)
International Classes:
E01C19/22; B60L50/13; E04F21/24; E04G21/10
Foreign References:
US7232277B22007-06-19
US6320350B12001-11-20
US20030068200A12003-04-10
US6846127B12005-01-25
US20140239921A12014-08-28
US5334899A1994-08-02
US20130129419A12013-05-23
US20040022581A12004-02-05
US3367250A1968-02-06
Attorney, Agent or Firm:
BURDICK, Sean D. (US)
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