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. 25, 2009
Filed:
Jul. 07, 2005
Todd James Albert, Narberth, PA (US);
Richard H. Rothman, Philadelphia, PA (US);
Rafail Zubok, Midland Park, NJ (US);
Mikhail Kvitnitsky, Clifton, NJ (US);
Todd James Albert, Narberth, PA (US);
Richard H. Rothman, Philadelphia, PA (US);
Rafail Zubok, Midland Park, NJ (US);
Mikhail Kvitnitsky, Clifton, NJ (US);
Cervical Xpand, LLC, Clifton, NJ (US);
Abstract
A posterior intervertebral stabilizer includes: a first stabilizing element having: (i) a first surface operable to engage an endplate of a first vertebral bone of a spine, and (ii) a second surface spaced apart from the first surface and operable to engage an endplate of an adjacent second vertebral bone of the spine; a second stabilizing element having: (i) a first surface operable to engage an endplate of the first vertebral bone of the spine, and (ii) a second surface spaced apart from the first surface and operable to engage an endplate of the adjacent second vertebral bone of the spine; and respective spring elements, each including helical coils, disposed between the respective first and second surfaces of the first and second stabilizing elements, each operable to provide a reactive force in response to compression loads from the first and second vertebral bones, wherein at least some diameters of respective turns of the respective helical coils differ.