Apparatus for collecting body fluid
US4112949A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Nov 15, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/67
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus for collecting body fluid utilizes a condition of negative pressure in a chamber for drawing body fluid from an area of a wound at a relatively constant flow rate. The apparatus includes a piston assembly movable in a housing from a first to a second position under forces of atmospheric pressure acting on the piston assembly. The apparatus further comprises an assembly for enabling operation of the piston assembly including at least one cylinder and piston movable therein by pulling on a hand gripping element attached to the piston to develop a partial vacuum in the cylinder. The piston assembly includes a diaphragm which is movable for maintaining the chamber sealed except through a port adapted for receipt of a tube connecting with said wound. The evacuator apparatus may be reused by emptying body fluid from the chamber and reenabling the piston assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.