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)
CHAPPLE LARRY JAKE (US)
BATEMAN NATHANIEL CODY (US)
DAVIS JEFFREY KEVIN (US)
Application Number:
PCT/US2018/037173
Publication Date:
January 24, 2019
Filing Date:
June 12, 2018
Export Citation:
Assignee:
MULTIQUIP INC (US)
International Classes:
E01C19/22; B60L50/13; E04F21/24; E04G21/10
Foreign References:
| US7232277B2 | 2007-06-19 | |||
| US6320350B1 | 2001-11-20 | |||
| US20030068200A1 | 2003-04-10 | |||
| US6846127B1 | 2005-01-25 | |||
| US20140239921A1 | 2014-08-28 | |||
| US5334899A | 1994-08-02 | |||
| US20130129419A1 | 2013-05-23 | |||
| US20040022581A1 | 2004-02-05 | |||
| US3367250A | 1968-02-06 |
Other References:
See also references of EP 3638850A4
Attorney, Agent or Firm:
BURDICK, Sean D. (US)
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