Back to results
US 7,479,861 B2Granted
Inductively coupled power, useful for wireless elevator hall fixtures
AssigneeOtis Elevator Company
InventorsBruce E. Zepke, William A. Veronesi, Joseph Zacchio, Paul A. Stucky, Dennis W. Bellamy, Christian M. Netter, Alberto Vecchiotti, Adriana H. Bacellar, Luiz F. Bacellar, Deborah C. Haas
Life of this patent
Estimating the term…
Abstract
Fixtures (27) at a doorway of a landing are formed integrally with a frame (17). Power is provided by an inductive coupler (32) having a core (70) and primary (75). The core is thin ferrite and extend significantly beyond the coils in the plane the coils are wound, to provide en extremely low resistance path for the efficient transfer of AC power.
Claims8
An inductive power coupler, comprising:
- a primary supported on an elevator car;
- a secondary supported on a stationary structure such that said secondary is separated from said primary by an air-gap;
- said primary and secondary each having a thin ferrite core with a coil wrapped around the core;
- each of said cores having a width extending outwardly from the corresponding coil, said width and a length of said cores being between two and ten times as large as said air-gap, and a thickness of 5%-25% of said width;
- and
- wherein said primary transfers power to said secondary.
3 more elements
An elevator hall fixture device, comprising:
- a primary;
- a secondary separated from said primary by an air-gap;
- said primary and secondary each having a thin ferrite core with a coil wrapped around the core;
- each of said cores having a width extending outwardly from the corresponding coil, said width and a length of said cores being between two and ten times as large as said air-gap, and a thickness of 5%-25% of said width;
- and
- an electrically powered elevator hall fixture that is coupled to the secondary to receive power from said secondary.
3 more elements
Dependencies are inferred from the claim text.