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:
Sep. 15, 1998
Filed:
Jun. 07, 1995
Steve A Herweck, Nashua, NH (US);
Theodore Karwoski, Hollis, NH (US);
David Cross, Atkinson, NH (US);
Atrium Medical Corporation, Hudson, NH (US);
Abstract
A blood collection device has a modular suction regulator assembly in the form of an adjustable negative pressure relief valve which controls the level of suction in a collection chamber by admitting air to a short bleed-in passage proximate to a suction connection. The modular assembly is a canister which drops into a receptacle oriented transversely in the collection vessel, and defines a laterally-directed intake manifold which resists blockage. The intake passes centrally through the canister along a path spanned by a filter, past a hat-shaped poppet supported on a compression spring. Fluted and threaded members control the scale and range of poppet response so that the assembly may be calibrated before installation. A face plate covers the installed canister, and radial vanes in the intake manifold double as gripping elements for manual adjustment of the assembly. A bellows meter provides refined suction resolution by linearly advancing across an oblique or curved reference line. Other improvements include a compact and balanced layout of suction canister, seal chamber and collection chamber, and a rigid handle assembly having five faces integral with the device.