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. 07, 1990
Filed:
Feb. 04, 1986
James P Cianci, Cary, IL (US);
The Kendall Company, Boston, MA (US);
Abstract
A liquid drainage system comprising a receptacle having a front wall, a back wall, and a chamber for collection of liquid therein. The system has a housing secured to an upper portion of the receptacle, said housing having a drip chamber, an annular wall in a lower portion of the drip chamber defining a valve seat, with said seat being disposed at an acute angle relative to the horizontal when the receptacle is in an upright position. The system has an anti-reflux valve comprising a sheet of flexible material having an upper portion and a lower portion and extending across said drip chamber such that the sheet is sufficiently large to engage against said seat peripherally around the drip chamber. The system has a device for retaining an upper portion of the valve against an upper portion of the seat, said valve being sufficiently flexible such that a lower portion of the valve flexes away from the seat when the receptacle is placed in an upright position due to gravity in the absence of liquid adjacent said valve and seat, and said lower portion of the valve flexes against the seat when the receptacle is disposed in a horizontal position.