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:
Aug. 06, 2013
Filed:
Feb. 03, 2005
Daniel G. Opoku, Longueuil, CA;
Murllo W. Bonilha, West Hartford, CT (US);
Wenlong LI, Tolland, CT (US);
Goldino Alves, South Windsor, CT (US);
Vijay Jayachandran, West Hartford, CT (US);
Daniel G. Opoku, Longueuil, CA;
Murllo W. Bonilha, West Hartford, CT (US);
Wenlong Li, Tolland, CT (US);
Goldino Alves, South Windsor, CT (US);
Vijay Jayachandran, West Hartford, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
An elevator cab ceiling includes an upper ceiling panel and a lower ceiling panel that are vertically spaced apart from each other with an intermediate ceiling cavity between them. An inlet duct is associated with the upper ceiling panel and an outlet duct is associated with the lower ceiling panel. The inlet and outlet ducts are horizontally spaced apart from each other and are fluidly connected to each other through the intermediate ceiling cavity to form a ventilation path. This separation of inlet and outlet ducts by an intermediate ceiling cavity reduces airborne noise transmissions that enter an elevator cab through the ventilation path. In one example, at least one baffle is installed within the intermediate ceiling cavity between the inlet and outlet ducts to interrupt a flow between the inlet and outlet to further reduce any transmitted noise.