# US 4,399,103 A · Blood dispenser device

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- Number: US 4,399,103 A
- Document ID: US4399103A
- Status: Granted
- Kind: A
- Application number: 06/229,120
- Filed: 1981-01-28
- Granted: 1983-08-16
- Earliest claimed: 1981-01-28
- Inventors: Louis T. Ferrara
- Web page: https://patentgrep.com/patent/US4399103A

## CPC

- A61M 39/286: {Wedge clamps, e.g. roller clamps with inclined guides}
- B01L 3/0293: {for liquids}
- Y10S 215/90: Collapsible wall structure
- Y10T 436/2575: Volumetric liquid transfer
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In the blood Bank area of a clinical laboratory a blood dispensing device is described capable of being used in conjunction with tubing containing blood which is attached to a blood donor bag. The end of said tubing is fed through one end of said device until it passes through the opposite end of the device at which point means are available to cut the tubing. The device is fitted with a knurled wheel or roller guided by an inclined track or ramp which upon turning the wheel in one direction causes the tubing to be squeezed or compressed thus allowing blood to be dispensed in a controlled dropwise fashion. In the opposite direction the wheel decompresses the tubing allowing it to be fed through once again in order to repeat the process as desired.

## Claims

### Claim 1

A device for dispensing blood in a controlled, dropwise manner, said device comprising: a support means having a rectangularly shaped base member, a first upstanding vertical wall connected along a longitudinal edge to a longitudinal edge of said base member, a second upstanding vertical wall having first and second ends and having one of the longitudinal edges therebetween connected to the other longitudinal edge of said base member at said first end only whereby said second end is free to be displaced towards said first upstanding vertical wall, said upstanding vertical walls forming therebetween respective openings at the end of said support means to facilitate the placement of a blood conveying tube, each of said upstanding vertical walls having a notched surface extending along the longitudinal length thereof and forming a track or bearing surface, said track or bearing surface being of a stepped configuration so that the track or bearing surface has a substantial first portion, starting adjacent said second free end and at a first height above said base member and extends to said first end at a second lower height above said base member; a wheel member having a centrally located axle which axle is received in the notch and engages the track or bearing surface, said wheel member having circumferentially located grooves which are parallel to said axle; knife means connected to said second free end; and tube means located between said base member, vertical upstanding walls and wheel whereby blood may be dispensed in a controlled dropwise manner from said tube.