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:
Apr. 08, 1997
Filed:
Aug. 08, 1995
Farhad Khosravi, Belmont, CA (US);
Michael S Williams, Chapel Hill, NC (US);
Advanced Cardiovascular Systems, Inc., Santa Clara, CA (US);
Abstract
An intravascular stent including a cylindrical sheet having overlapping edges that interlock. The edges have a series of protrusions and apertures that interlock and ratchet as the stent expands to an open position to support a section of arterial wall. The stent may be expanded by a balloon catheter or it may be self-expanding. The stent is biocompatible, may be bio-erodible, and capable of localized drug delivery. A plurality of retaining members to keep the stent open are disclosed. In one embodiment a buckle fastening member is used, while in another embodiment a helical seam containing projections is employed. The stent may be wound in such a manner that during expansion of the stent one side of the sheet desires to return to its original shape, creating a bias. In addition, a variety of reticulated structure stents are disclosed, with novel geometric patterns that aid in increased flexibility while preserving radial strength and also allow blood-tissue interaction and side branch access. The intravascular stent may be made of a sheet of material strengthened and stiffened by pyrolytic carbon or by structural reinforcement as in composite laminates.