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:
Nov. 11, 1997
Filed:
Nov. 18, 1996
Edward P Furlani, Lancaster, NY (US);
Bijan Barzideh, Rush, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An hard stop for use with an aperture mechanism includes at least one blade moveable along a path between a closed position and at least one open position. At least one hard stop piston is moveable between a first position, out of the blade path, and a second position, in the blade path, to position the blade in the open position when an edge of the blade contacts the hard stop piston. The hard stop includes a magnetic piston, an electromagnet coil proximate to the magnetic piston, and a ferromagnetic ring arranged such that when current is applied in one direction through the coil it causes the magnetic piston to move to the first position in a first direction and held in such position by the attraction of the magnetic piston to the ferromagnetic ring and causes the magnetic piston to move to the second position when current is applied in an opposite direction to the coil and the magnetic piston is held in such position by the attraction of the magnetic piston to the ferromagnetic ring.