US3847200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for concentrating laboratory specimens by evaporation
Assignee: BRINKMANN INSTRUMENTS Inc A CORP OF DE
•
Filing: 1972-05-01
•
Granted: 1974-11-12
•
Expires: 1992-05-01
Abstract
Abstract Apparatus is disclosed for concentrating chemical and biological specimens which are present in dilute solutions in solvent liquids. By means of a pressure differential and air jet nozzles, the vapor layer which normally appears above the specimens is continuously dispelled. The evaporating areas are maintained under sub-atmospheric pressure both to augment the evaporation process and induce a jet stream of air which impinges on the specimen surface. The specimen containers are heated from a controlled source, such as a thermostatically controlled heat sink.
Inventors
- 👤 R Kopp
- 👤 H Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:54
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5085; B01L3/50851; B01L3/50853; G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/4022; G01N2001/4027
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
Apparatus for concentrating laboratory specimens by evaporation comprising a base receptacle for a plurality of specimen vessels and including a heat sink having a plurality of individual chambers adapted to have seated therein open vessels containing laboratory specimens, a heat source for the heat sink including means to regulate the temperature thereof, a detachable cover assembly adapted to be seated in substantially air-tight relationship on the base over the chambers, said cover assembly comprising depending side walls including opposing end portions to engage the base in air-tight relationship, at least one rigid horizontal tube member carried by and joined to the opposing side walls and open to the atmosphere through at least one side wall, the tube member passing horizontally over a plurality of said chambers in close proximity thereto and carrying a plurality of downwardly directed air orifices aligned respectively with the plurality of chambers below, and means to establish subatmospheric pressure in the closed space whereby air is drawn into the tube member and discharged downwardly in a plurality of jet streams into the respective vessels disposed in the chambers.
Claim 2
Dependent Claim
182 words
Apparatus for concentrating laboratory specimens by evaporation comprising a base receptacle for a plurality of specimen vessels and including a heat sink having a plurality of individual chambers adapted to have seated therein open vessels containing laboratory specimens, a heat source for the heat sink including means to regulate the temperature thereof, a detachable cover assembly adapted to be seated in substantially air-tight relationship on the base over the chambers, said cover assembly comprising depending side walls including opposing end portions to engage the base in air-tight relationship, at least one rigid horizontal tube member carried by and joined to the opposing side walls and open to the atmosphere through at least one side wall, the tube member passing horizontally over a plurality of said chambers in close proximity thereto and carrying a plurality of downwardly directed air orifices aligned respectively with the plurality of chambers below, and means to establish subatmospheric pressure in the closed space whereby air is drawn into the tube member and discharged downwardly in a plurality of jet streams into the respective vessels disposed in the chambers.
Claim 3
Dependent Claim
72 words
Apparatus as set forth in claim 1, including a common rack for supporting said plurality of specimen vessels in positions in vertical alignment with the respective chambers in the heat sink, said rack having downwardly extending legs to carry the respective specimen vessels above a supporting surface, and means forming guide slots in the receptacle to receive the legs and to cause the respective vessels to be lowered into their corresponding chambers.
Claim 4
Dependent Claim
170 words
Apparatus for concentrating laboratory specimens by evaporation comprising a base for receiving a plurality of specimen vessels, a heat source for the vessels including means to regulate the temperature thereof, a detachable cover assembly adapted to be seated in substantially air-tight relationship on the base over the vessels, said cover assembly comprising depending side walls to engage the base and a substantially flat, horizontally disposed top surface, manifold means carried by the side walls between the top surface and the chambers and defining an air conduit both to the underside of the top surface and to the respective vessels below, the air path to the chambers including a plurality of downwardly directed openings defining air nozzles above The respective chambers, inlet means connecting the manifold to the atmosphere, and means to establish sub-atmospheric pressure in the closed space whereby air is drawn into the conduit and caused to impinge both on the underside of the top surface and downwardly in a plurality of jet streams directed into the respective vessels.
Claim 5
Dependent Claim
170 words
Apparatus for concentrating laboratory specimens by evaporation comprising a base for receiving a plurality of specimen vessels, a heat source for the vessels including means to regulate the temperature thereof, a detachable cover assembly adapted to be seated in substantially air-tight relationship on the base over the vessels, said cover assembly comprising depending side walls to engage the base and a substantially flat, horizontally disposed top surface, manifold means carried by the side walls between the top surface and the chambers and defining an air conduit both to the underside of the top surface and to the respective vessels below, the air path to the chambers including a plurality of downwardly directed openings defining air nozzles above The respective chambers, inlet means connecting the manifold to the atmosphere, and means to establish sub-atmospheric pressure in the closed space whereby air is drawn into the conduit and caused to impinge both on the underside of the top surface and downwardly in a plurality of jet streams directed into the respective vessels.
References Cited (Backward Citations)
US5570A
Cited
US42398A
Cited
US201762A
Cited
US217684A
Cited
CA451686A
Cited
US937114A
Cited
US2385962A
Cited
US2660513A
Cited
US2771645A
Cited
US2803888A
Cited
US3084537A
Cited
US3565767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |