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US 4,790,911 AGranted
Solvent evaporator
OwnerMartin Parkinsoninventor
Life of this patent
Estimating the term…
Abstract
A rotary evaporator for laboratory scale solvent evaporative procedures is described. A magnetically driven fluorocarbon coated rotor, operating within a container for solvents, creates a thin film for rapid solvent evaporation without the usual requirement for rotating the entire solvent container assembly. Rotary seals are eliminated, increased control over bubbling and foaming at higher vacuum is obtained, and continuous solvent addition is simplified.
Claims23
An apparatus for evaporating a solvent, which comprises:
- (A) A motor with an attached magnet;
- (B) A hot plate means;
- (C) A container for said solvent;
- (D) Said container having a base, and said container having an opening for the placement of a rotor within said container;
- (E) A closure for said opening in said container;
- (F) Means for connecting said container to a source of vacuum;
- (G) Said rotor being cylindrical in shape, having a base and an open top, said base in said rotor having an opening, said rotor being removably placed within said container;
- (H) Means for magnetically attracting said base of said rotor, being affixed to said base of said rotor;
- and
- (I) said container and said rotor being positioned in a substantially horizontal position on the top surface of said hot plate means, with the base of said container being immmediately adjacent said magnet, such that the magnetic field of said magnet securely engages the means for magnetically attracting said base of said rotor so that when said motor is energized said magnet is caused to rotate which simultaneously causes said rotor to rotate in synchrony with said magnet, and a thin film of said solvent is caused to be deposited onto the inner and outer surfaces of said rotor.
7 more elements
An apparatus for evaporating a solvent, which comprises:
- (A) A motor with an attached magnet;
- (B) A hot plate means;
- (C) A cylindrical glass flask, having a base and a top, said base of said flask being closed, and said top of said flask being open;
- (D) Said base of said flask being substantially flat;
- (E) A closure for said flask;
- (F) Means for connecting said flask to a source of vacuum;
- (G) Means for controlling oscillation of a rotor during rotation;
- (H) Said rotor being cylindrical in shape, having a solid base and an open top, said rotor being removably placed within said flask;
- (I) Means for magnetically attracting said base of said rotor being affixed to said base of said rotor;
- and
- (J) Said flask being positioned in a horizontal position on the top surface of said hot plate means, with the base of said flask immediately adjacent said magnet, such that the magnetic field of said magnet securely engages said means for magnetically attracting said base of said rotor so that when said motor is energized said magnet is caused to rotate which simultaneously causes said rotor to rotate in synchrony with said magnet, and a thin film of said solvent is caused to be deposited substantially onto the outer surface of said rotor.
8 more elements
Dependencies are inferred from the claim text.