Edward Vrana

US Patent:

48925667, Jan 9, 1990

Filed:

Mar 22, 1989

Appl. No.:

7/326905

Inventors:

Ravinder K. Bansal - East Amherst NY
Edward E. Vrana - West Seneca NY

Assignee:

AirSep Corporation - Buffalo NY

International Classification:

B01D 5304

US Classification:

55 26

Abstract:

A pressure swing adsorption process and system utilize a single adsorber for fractionating at least one constituent from a stream of a gaseous mixture fed into the adsorber and a reservoir for receiving product gas exiting the adsorber. Following a step in the process operation involving a venting of the adsorber inlet during which no product gas is withdrawn, the feed stream is shut off and remains shut off while product gas collected in the reservoir is conducted to the adsorber outlet for the purpose of equalizing the internal pressures of the adsorber and reservoir. Once the pressures are equalized, the flow of the feed stream into the adsorber is resumed and any flow of product gas between the adsorber outlet and the reservoir is shut off so that the continued feed stream flow into the adsorber raises the adsorber pressure to an elevated level. When the flow of product gas from the adsorber is subsequently permitted, the product gas exits the adsorber rapidly and the pressure levels of the adsorber and reservoir move toward equalization.

US Patent:

41948904, Mar 25, 1980

Filed:

Feb 1, 1978

Appl. No.:

5/874167

Inventors:

Norman R. McCombs - Tonawanda NY
Edward E. Vrana - West Seneca NY

Assignee:

Greene & Kellogg, Inc. - Tonawanda NY

International Classification:

B01D 5304

US Classification:

55 18

Abstract:

A pressure swing adsorption process and system including at least two adsorption beds and a segregated storage adsorption bed which is isolated from direct communication with the feed gas stream. During the process the pressures in the adsorption beds are equalized from the feed ends thereof at the end of adsorption in one of the beds and after pressurization of the other bed. The segregated storage adsorption bed is pressure equalized with a depressurizing adsorption bed and then after purging of the bed the segregated storage adsorption bed is equalized with that adsorption bed during repressurizing thereof. A pair of flow control valves are connected in a gas flow path connected to the outlets of the adsorption beds, each valve being located adjacent a corresponding one of the beds and allowing unrestricted flow away from the corresponding bed and controlled flow toward that bed. A reservoir connected to the system output conduit stores product gas for use during a system malfunction or for augmenting system function.

US Patent:

D3110613, Oct 2, 1990

Filed:

Sep 21, 1987

Appl. No.:

7/098901

Inventors:

Edward E. Vrana - West Seneca NY
Ravinder K. Bansal - East Amherst NY

Assignee:

AirSep Corporation - Buffalo NY

US Classification:

D24 8

US Patent:

42630185, Apr 21, 1981

Filed:

Aug 3, 1979

Appl. No.:

6/063628

Inventors:

Norman R. McCombs - Tonawanda NY
Edward E. Vrana - West Seneca NY

Assignee:

Greene & Kellogg - Tonawanda NY

International Classification:

B01D 5304

US Classification:

55 18

Abstract:

A pressure swing adsorption process and system including at least two adsorption beds and a segregated storage adsorption bed which is isolated from direct communication with the feed gas stream. During the process the pressures in the adsorption beds are equalized from the feed ends thereof at the end of adsorption in one of the beds and after pressurization of the other bed. The segregated storage adsorption bed is pressure equalized with a depressurizing adsorption bed and then after purging of the bed the segregated storage adsorption bed is equalized with that adsorption bed during repressurizing thereof. A pair of flow control valves are connected in a gas flow path connected to the outlets of the adsorption beds, each valve being located adjacent a corresponding one of the beds and allowing unrestricted flow away from the corresponding bed and controlled flow toward that bed. A reservoir connected to the system output conduit stores product gas for use during a system malfunction or for augmenting system function.

US Patent:

48028991, Feb 7, 1989

Filed:

Sep 21, 1987

Appl. No.:

7/098879

Inventors:

Edward E. Vrana - West Seneca NY
Ravinder K. Bansal - Amherst NY

Assignee:

AirSep Corporation - Buffalo NY

International Classification:

B01D 5304

US Classification:

55161

Abstract:

An air separator for separating at least one constituent element from air delivered from an air source by a pair of adsorption beds utilizes a control box and assembly of working components arranged in such a relationship to one another within the control box so as to facilitate service and maintenance of the air separator. The working components of the air separator include filtering componentry, a pressure regulator, a pair of feed valves, a pair of waste valves, a pair of product and equalization valves and a product flow controller operatively connected in flow communication with one another for routing the source air through the separator and which are arranged in a substantially vertical plane within the control box. Because the working components are arranged in a generally planar arrangement, each of the working components is readily and easily accessible.