The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2007
Filed:
Feb. 06, 2004
Applicants:
Toru Takehara, San Mateo, CA (US);
Kinya Ichimura, Foster City, CA (US);
Inventors:
Toru Takehara, San Mateo, CA (US);
Kinya Ichimura, Foster City, CA (US);
Assignee:
Paceco Corp, Hayward, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B66B 1/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for energy storage and recovery for load hoisting equipment powered by an induction hoist motor controlled by a first inverter and having a dual inverter controlling a capacitor utilizing rest power such as reverse power generated from the motor when lowering a load, and unused power at small load or idle, to charge the capacitor whereby energy is stored in the capacitor and the system is reversed when a load is lifted and power is consumed whereby the capacitor is discharged to deliver power to the hoist motor.