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. 17, 1998
Filed:
Sep. 09, 1996
David M Schill, Knoxville, TN (US);
Joseph G Schill, Lynchburg, VA (US);
Schill Enterprises, Inc., Knoxville, TN (US);
Abstract
A variable volume cell saver bowl for to centrifuge blood for collection of red blood cells therefrom. The variable volume cell saver bowl is designed to vary the volume within the bowl to accommodate blood collections of various volumes in order to use the entire recovered volume of blood. The bowl includes generally an outer shell and an inner shell. The outer shell defines integrally formed first and second side walls, the first side wall having a frusto-conical configuration and the second side wall having a cylindrical configuration extending coaxially away from the larger diameter end of the first side wall. The inner shell is disposed concentrically within the outer shell and defines a frusto-conical configuration similar to that of the outer shell first side wall. A centrally disposed hollow core is carried within the inner shell such that the inner shell defines a substantially toroidal configuration having a trapezoidal cross-section. The inlet portion of an inlet/outlet coupling is directed through the hollow core of the inner shell and eventually to the upper end of the outer shell and through the outlet side of the coupling. A piston head is secured to the inner shell lower end wall via at least one spacer. Rotation is imparted on the piston shall or outer shell in order to rotate the bowl to create centrifugal force within the bowl. A linear displacement device is journalled to the distal end of the piston shaft in order to move the inner shell toward either the top or bottom end wall of the outer shell, thus reducing or increasing the volume within the bowl.