Blood serum collection tube and method of collection

{
  "publication_number": "US3586064A",
  "country": "US",
  "kind": "A",
  "title": "Blood serum collection tube and method of collection",
  "abstract": "The disclosure relates to an apparatus and a method for removing serum from the uppermost portions of a specimen tube of centrifuged blood, in which the blood serum is disposed in a liquid pool above settled-out cellular solid materials. More particularly, the invention is directed to an easily handleable, readily mailable, collection tube closed at both ends by ''''oneshot'''' valve structures comprising self-sealing elastomeric elements pierced by hollow needles. Additionally, at least the lower valve element is definitive of a pistonlike member which is adapted to engage the inner walls of the specimen tube to pump serum therefrom.",
  "claims": [
    "2. The apparaTus of claim 1, in which: a. said upper valve means includes a second elastomeric sealing material cover said upper end and a second hollow needle extending therethrough, b. said second elastomeric material possesses sufficient resilience and said second hollow needle is sufficiently narrow whereby up on the removal of said second needle from said second elastomeric material said upper end of the tubular member will be completely self-sealed.",
    "3. The apparatus of claim 2, in which: a. the second needle mounts a gripping means by which the second needle may be removed from said second elastomeric material.",
    "4. The apparatus of claim 2, in which: a. a mechanical means joins said second elastomeric sealing means to said upper end of the tubular member.",
    "5. The apparatus of claim 4, in which: a. said mechanical means includes a resilient snap ring, and b. said elastomeric sealing means comprises a generally cup-shaped member, c. the uppermost end of said tubular member includes an annular bead.",
    "6. The apparatus of claim 1, in which: a. the first needle mounts a gripping means by which the first needle may be removed from said first elastomeric material.",
    "7. The apparatus of claim 1, in which: a. a mechanical means joins said first elastomeric sealing means to said lower end of the tubular member.",
    "8. The apparatus of claim 7, in which: a. said mechanical means includes a resilient snap ring, b. said elastomeric sealing means comprises a generally cup-shaped member, c. the uppermost end of said tubular member includes an annular bead.",
    "9. The apparatus of claim 1, in which: a. said tubular member is transparent.",
    "10. The apparatus of claim 1, in which: a. said tubular member is glass, and b. predetermined portions of said glass are etched and thereby adapted to be indicia bearing.",
    "11. A method of removing serum from a specimen tube comprising the steps of: inserting a tubular plunger closed off at its lower end by a pistonlike element pierced by a hollow needle into the specimen tube to drive serum upwardly therethrough and into said collection tube, b. maintaining the upper end of said collection tube open to atmosphere while said collection is driven downwardly into said serum, c. closing off the upper end of said collection tube from atmosphere upon termination of the downward stroke of said collection tube, d. removing said collection tube from said specimen tube, and e. closing off the lower end of said collection tube by removing said needle from the lower end thereof."
  ],
  "cpc": [
    "B01L 3/5021",
    "B01L 2300/044",
    "B01L 2300/048",
    "B01L 2300/0672",
    "B01L 2400/0478",
    "B01L 2400/0638",
    "B01L 3/502",
    "G01N 33/491"
  ],
  "ipc": [
    "B01L 3/00",
    "B01L 3/14",
    "G01N 33/49"
  ],
  "assignees": [
    "Metropolitan Pathology Lab Inc"
  ],
  "inventors": [
    "Paul A Brown",
    "Joseph O'brien"
  ],
  "filing_date": "1969-09-03",
  "publication_date": "1971-06-22",
  "grant_date": "1971-06-22",
  "priority_date": "1969-09-03",
  "application_number": "US-3586064D-A",
  "family_id": "25320049",
  "cited_by_count": 99
}