US4470431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe valve and clamping mechanism
Assignee: Baxter International Inc
•
Filing: 1982-02-23
•
Granted: 1984-09-11
•
Expires: 2002-02-23
Abstract
Abstract A syringe valve and clamping mechanism for an automated liquid dispenser using a demountable precision metering syringe for automatically dispensing reagents or diluting samples with reagent.
Inventors
- 👤 Carl L. Shackelford
- 👤 John F. Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:27
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/56; B01L3/567; B01L3/02; B01L3/0289; B01L3/0293; B01L9/00; B01L9/50; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A dispenser valve comprising a valve body having a valve seat and ports passing through the surface of the valve seat each for communication with a separate fluid conduit; a valve rotor having a seating face shaped in conformance with the valve seat and seated in fluid-tight contact with the valve seat; a fluid communication groove formed in the rotor to communicate selectively a pair of valve ports with one another; and spring bias means pressing the seating face of the rotor into fluid-tight contact with the valve seat including, a sleeved pressure pad embracing the rotor and having a receiving detent, a drive tang carrying a generally hemispherically shaped bearing end, and a spring biasing the drive tang bearing end into the pressure pad detent upon the rotor rotational axis.
Claim 2
Dependent Claim
131 words
A dispenser valve comprising a valve body having a valve seat and ports passing through the surface of the valve seat each for communication with a separate fluid conduit; a valve rotor having a seating face shaped in conformance with the valve seat and seated in fluid-tight contact with the valve seat; a fluid communication groove formed in the rotor to communicate selectively a pair of valve ports with one another; and spring bias means pressing the seating face of the rotor into fluid-tight contact with the valve seat including, a sleeved pressure pad embracing the rotor and having a receiving detent, a drive tang carrying a generally hemispherically shaped bearing end, and a spring biasing the drive tang bearing end into the pressure pad detent upon the rotor rotational axis.
Claim 3
Dependent Claim
32 words
The dispenser valve of claim 1 further comprising means for bidirectionally rotating the rotor wherein the drive tang is pinned to the rotor on an axis offset from the rotor drive axis.
Claim 4
Dependent Claim
179 words
A dispenser valve for fluid communication with the interior of a precision metering syringe which has a clamping flange comprising a valve body having a valve seat and ports passing through the surface of the valve seat each for communication with a separate fluid conduit;. a valve rotor having a seating face shaped in conformance with the valve seat and seated in fluid-tight contact with the valve seat; a fluid communication groove formed in the rotor to communicate selectively at least one pair of valve ports with one another; spring bias means pressing the seating face of the rotor into fluid-tight contact with the valve seat; valve actuator means for stepping the rotor from one set of port communication positions to another; and means clamping the open end of the metering syringe to the valve body in fluid communication with at least one of said ports including a gripping flange bearing upon the syringe clamping flange; and means for jacking the gripping flange toward the valve body and thereby move the syringe into fluid-tight engagement with said valve body.
Claim 5
Dependent Claim
179 words
A dispenser valve for fluid communication with the interior of a precision metering syringe which has a clamping flange comprising a valve body having a valve seat and ports passing through the surface of the valve seat each for communication with a separate fluid conduit;. a valve rotor having a seating face shaped in conformance with the valve seat and seated in fluid-tight contact with the valve seat; a fluid communication groove formed in the rotor to communicate selectively at least one pair of valve ports with one another; spring bias means pressing the seating face of the rotor into fluid-tight contact with the valve seat; valve actuator means for stepping the rotor from one set of port communication positions to another; and means clamping the open end of the metering syringe to the valve body in fluid communication with at least one of said ports including a gripping flange bearing upon the syringe clamping flange; and means for jacking the gripping flange toward the valve body and thereby move the syringe into fluid-tight engagement with said valve body.
Claim 6
Dependent Claim
21 words
The dispenser valve of claim 3 wherein the gripping flange encircles about 180° of the syringe clamping flange in clamping engagement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |