John G Caldwell

US Patent:

6427879, Aug 6, 2002

Filed:

Nov 24, 1999

Appl. No.:

09/449296

Inventors:

John W. Caldwell - Wallingford PA 19086

International Classification:

A47G 1914

US Classification:

2224651, 222158, 222566, 222572, 73426

Abstract:

Containers having improved ability to deliver materials, especially comestibles into restricted containers are provided. Such containers, preferably of the type normally denominated as âmeasuring cupsâ preferably comprise elongated snouts projecting upwardly and outwardly from their top and side surfaces so as to facilitate such transfer.

US Patent:

6561965, May 13, 2003

Filed:

Oct 20, 2000

Appl. No.:

09/693577

Inventors:

Nicholas Corner-Walker - Oesterbro, DK
John W. Caldwell - Glenside PA

Assignee:

Alfa Laval Inc. - Glen Allen VA

International Classification:

B04B 120

US Classification:

494 53

Abstract:

The present invention is directed to a mist pump for a conveyor of a decanter centrifuge. The mist pump is incorporated into the feed chamber and prevents mist from leaving the feed zone and building up a layer of feed in the conveyor hub. The mist pump includes a plurality of vanes attached to, extending radially inward from and spaced about an interior surface of the sidewall of the feed chamber. The mist pump also includes a ring positioned coaxially about the longitudinal axis, attached to each of the pump vanes and spaced radially inward from the sidewall to provide a plurality of return openings defined by the ring and the sidewall.

US Patent:

6572524, Jun 3, 2003

Filed:

Jul 14, 2000

Appl. No.:

09/616443

Inventors:

John W. Caldwell - Glenside PA

Assignee:

Alfa Laval Inc. - Warminster PA

International Classification:

B04B 120

US Classification:

494 53

Abstract:

A decanter centrifuge is defined for separating a heavy phase material from a liquid within a feed mixture. The decanter centrifuge includes a bowl rotatable about its longitudinal axis for separation of the heavy phase material from the liquid feed mixture due to centrifugal force. The bowl typically includes a cylindrical portion and a frusto-conical portion at one end. A solids discharge is provided in the restricted end of the frusto-conical bowl portion. A screw conveyor is coaxially mounted for rotation within the bowl, having a spiraled conveyor flight extending radially outwardly to a position adjacent the inside wall of the bowl. The conveyor is adapted to rotate at a relative speed with respect to the bowl for conveying separated heavy phase material toward the heavy phase discharge. A baffle in the form of a disc extends radially outwardly from the conveyor hub and is adapted to project into the separated heavy phase material being conveyed along the bowl wall. A shelf is positioned between the disc and a forward or conveying portion of the conveyor flight.

US Patent:

6589154, Jul 8, 2003

Filed:

May 30, 2001

Appl. No.:

09/867715

Inventors:

John W. Caldwell - Glenside PA

Assignee:

Alfa Laval Inc. - Glen Allen VA

International Classification:

B04B 120

US Classification:

494 53, 494 84

Abstract:

A decanter centrifuge is disclosed for separating a liquid feed mixture into constituent parts. The decanter centrifuge includes a bowl assembly mounted for rotation about a longitudinal axis. Opposite ends of the bowl assembly are rotatably supported by first and second bearings. A motor is engaged with one end of the bowl assembly for rotating the bowl about the longitudinal axis. A screw conveyor is coaxially mounted within the bowl with a conveyor shaft attached thereto. A gear box is located between the second bearing and the bowl and includes a transmission engaged to the shaft. The transmission rotates the conveyor at a relative speed with respect to the bowl. A plurality of circumferentially spaced posts mount the gear box to the bowl, spacing the gear box apart from the bowl. Effluent discharge ports on the bowl discharge effluent into the space between the bowl and the gear box.

US Patent:

20030179181, Sep 25, 2003

Filed:

Mar 24, 2003

Appl. No.:

10/395445

Inventors:

John Caldwell - Wallingford PA, US

International Classification:

G09G005/00

US Classification:

345/156000

Abstract:

Improved antennas for “wireless” computing are provided In accordance with certain featured embodiments, wireless communications between computers and peripherals such as keyboards, pointing devices, monitors, processors, networks, printers, and other devices, are provided. Antennas and antenna systems are adapted, for example, for use in areas, such as individual offices, conference rooms, and the like, or for larger assemblages, networks and sites. Methods of installing such antennas and methods of using them are also comprehended herby. In accordance with preferred features, inobtrusive, flat antennas are connected to personal computers via small, inconspicuous wiring. Such antennas can be placed beneath wallpaper and the like.

US Patent:

55098827, Apr 23, 1996

Filed:

Sep 12, 1994

Appl. No.:

8/304073

Inventors:

John W. Caldwell - Glenside PA

Assignee:

Tetra Laval Holdings & Finance S.A.

International Classification:

B04B 120
B04B 1100

US Classification:

494 29

Abstract:

A liquid-solids separator, or centrifuge, of the type having a screw conveyor is provided with a series of offset conveyor flights. A spacer is positioned within the offset of the conveyor flights to form a channel therein. Rinse liquid is introduced into the channel through the central hub of the conveyor. The channel directs the rinse liquid into the heavy phase cake. An opening may be provided at various radial distances for varying the position of introduction of the rinse liquid from the channel. The amount of rinse liquid introduced through various channels formed by the series of offset conveyor flights may also be varied.

US Patent:

47641630, Aug 16, 1988

Filed:

Jul 3, 1986

Appl. No.:

6/864045

Inventors:

John W. Caldwell - Glenside PA

Assignee:

Pennwalt Corporation - Philadelphia PA

International Classification:

B04B 304
B04B 1100

US Classification:

494 56

Abstract:

Decanter pond level or radius is adjusted incrementally by means of an annular retainer plate having an eccentric recess formed in the surface thereof which faces hub openings. The recess receives a plate dam slidably therewithin. Each retainer plate or retainer, typically 6 in number, is mounted over a hub opening. The dam is mounted over the hub opening such that its weir surface substantially coincides with the rotating pond level. By rotating the retainer around the prepositioned dam in increments preset in the retainer, the dam moves radially inwardly or outwardly depending upon the position of the recess eccentricity with respect to the hub opening. The dam is provided with two different weir surfaces, each usable with a different side of the dam, thus permitting the number of adjustments to the pond level to be doubled. A modification discloses infinite or stepless pond level adjustments.

US Patent:

59712228, Oct 26, 1999

Filed:

Feb 27, 1998

Appl. No.:

9/032142

Inventors:

John W. Caldwell - Wallingford PA

International Classification:

B65D 3700

US Classification:

222206

Abstract:

Drink bottles are provided having improve sanitation. In accordance with the preferred feature of the invention, a barrier is disposed around the spout of a squeezable drink bottle so as to inhibit contact between the end of the spout from which liquid is expressed and the lips of a person receiving liquid from a bottle. Elimination of reflux and improved sanitation results.