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:
Mar. 23, 2004
Filed:
May. 04, 2001
Applicant:
Inventor:
Roberto Zappa, Bergamo, IT;
Assignee:
Sematic Italia S.p.A., Bergamo, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E06B 3/34 ;
U.S. Cl.
CPC ...
E06B 3/34 ;
Abstract
A drive unit for doors, especially doors having a non-rectilinear profile formed by wings ( ) comprises a motor ( ) whose rotary shaft ( ) engages with at least a bar or section ( ) connected to at least one of said wings. The drive unit is located either on the roof or the external front of the lower basis or between the wings of an elevator car of story doors. In case of telescopic movement superposed wings, one of the wing is moved by the drive unit, and a transmission unit ( ) transmits the rotation of a wing ( ) to the other one ( ).