US3800947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reagent tube and centrifugally operated solid-liquid separating device
Assignee: Individual
•
Filing: 1971-07-16
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Granted: 1974-04-02
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Expires: 1991-07-16
Abstract
Abstract A reagent receptacle adapted for mounting in a centrifuge and having a discharge opening positioned for centrifugal discharge of matter therefrom; a filter mounted in the receptacle for filtering the matter discharged; and a normally closed centrifugal force responsive valve controlling flow through the opening.
Inventors
- 👤 P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/04; B01; B01D; B01D33/00; B01D33/06; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021; B04B5/00; B04B5/04; B04B5/0407; B04B5/0414; B04B5/0421
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
A centrifugal solid-liquid separation apparatus comprising: a receptacle having a chamber for receipt of reagents to be mixed therein and being adapted for mounting in a centrifuge for orbiting therewith and having an orbiting position; said receptacle being formed with a discharge opening for said chamber positioned at the radially outer portion of said receptacle in said orbiting position; a filter carried by said receptacle and mounted for filtering the discharge through said opening; a valve carried by said receptacle and having a normally seated position sealing said chamber from said opening and an unseated position communicating said chamber and opening; and said valve being formed and mounted for responding to a predetermined magnitude of centrifugal force developed by said orbiting for displacement to an unseated position, thereby centrifugally driving the contents of said chamber through said filter and discharge opening.
Claim 2
Dependent Claim
141 words
A centrifugal solid-liquid separation apparatus comprising: a receptacle having a chamber for receipt of reagents to be mixed therein and being adapted for mounting in a centrifuge for orbiting therewith and having an orbiting position; said receptacle being formed with a discharge opening for said chamber positioned at the radially outer portion of said receptacle in said orbiting position; a filter carried by said receptacle and mounted for filtering the discharge through said opening; a valve carried by said receptacle and having a normally seated position sealing said chamber from said opening and an unseated position communicating said chamber and opening; and said valve being formed and mounted for responding to a predetermined magnitude of centrifugal force developed by said orbiting for displacement to an unseated position, thereby centrifugally driving the contents of said chamber through said filter and discharge opening.
Claim 3
Dependent Claim
43 words
An apparatus as defined in claim 1 said receptacle providing a seat for said valve, said valve and seat being formed for resilient retention of said valve in seated position and for centrifugal displacement of said valve from said seat to unseated position.
Claim 4
Dependent Claim
52 words
An apparatus as defined in claim 2, said receptacle having an annular wall with an internal concave surface forming said discharge opening and said seat; and said valve comprising a ring of resiliently compressible material having an external convex surface compressibly engaging said concave surface in the seated position of said valve.
Claim 5
Dependent Claim
36 words
An apparatus as defined in claim 3, said valve comprising a stem mounted for axial reciprocation in said opening and for centrifugal displacement therethrough, said stem being formed with an annular socket demountably receiving said ring.
Claim 6
Dependent Claim
50 words
An apparatus as defined in claim 1 and means for supporting said receptacle when placed in said centrifuge for relative displacement of said receptacle and means as a function of centrifugal force and being connected to said valve for movement thereof to unseated position by and upon said relative displacement.
Claim 7
Dependent Claim
71 words
An apparatus as defined in claim 5 said receptacle being of elongated form and having said discharge opening in one end thereof; said means comprising a section telescopically receiving said receptacle for radial outward displacement therein in said orbiting position; spring means mounted to resist said outward displacement of said receptacle; and said valve having a stem engaging said section upon said outward displacement to displace said valve to unseated position.
Claim 8
Dependent Claim
32 words
An apparatus as defined in claim 6, a liquid receiver demountably secured to said section; and said section being formed with a passage conducting liquid from said discharge opening to said receiver.
Claim 9
Dependent Claim
55 words
An apparatus as defined in claim 7 said valve having a head mounted in said chamber and said stem extending through said discharge opening to engage said section; said stem and receptacle providing spaced spring rests; and said spring means being mounted in compression between said rests for retaining said valve in normally seated position.
Claim 10
Dependent Claim
18 words
An apparatus as defined in claim 8, said spring means being of helical form surrounding said stem portion.
Claim 11
Dependent Claim
22 words
An apparatus as defined in claim 8, said spring means comprising a tube of flexibly resilient plastic material surrounding said stem portion.
Claim 12
Dependent Claim
48 words
An apparatus as defined in claim 1 said filter having a mounting in said receptacle in spaced opposed relation to said discharge opening; and said valve being mounted for manual displacement and for engagement with said filter upon said manual displacement for dislodging said filter from said mountIng.
Claim 13
Dependent Claim
31 words
An apparatus as defined in claim 1 spring means biasing said valve to seated position and comprising a plurality of resilient arms connected to said valve and supported by said receptacle.
Claim 14
Dependent Claim
38 words
An apparatus as defined in claim 12 said valve having a stem mounted through said discharge opening; said arms extending radially from said stem; and said receptacle being formed with lands supporting the outer ends of said arms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |