Randall K Olson

US Patent:

6722927, Apr 20, 2004

Filed:

May 28, 2003

Appl. No.:

10/446457

Inventors:

Christopher L. Eriksen - Saint Paul MN
James L. Gravel - Prior Lake MN
Randall C. Olson - Prior Lake MN
David Strei - Waconia MN

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

H01R 13405

US Classification:

439736, 73756

Abstract:

An electrical connector protects a pressure sensor stem that protrudes from a pressure sensor capsule. The electrical connector includes a baseplate with a central hole and a peripheral wall joined to the baseplate and protruding below the baseplate. The peripheral wall slidingly engages the pressure sensor capsule as the pressure sensor stem passes through the central hole to protrude above the baseplate. A protective wall joined to the baseplate protrudes above the pressure sensor stem and protects the pressure sensor stem. A lead frame in the protective wall provides electrical connections to sensor contact pads on the pressure sensor stem.

US Patent:

61486817, Nov 21, 2000

Filed:

May 28, 1999

Appl. No.:

9/322727

Inventors:

James L. Gravel - Prior Lake MN
Bruce L. Johnson - St. Anthony MN
James A. Kronmiller - River Falls WI
Randall C. Olson - Prior Lake MN
Steven D. Kruse - Bloomington MN

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

G01F 2326

US Classification:

738665

Abstract:

A process seal assembly adapted for installation to a process vessel opening. A probe with a probe connector connects to a rod inside a passageway of a housing adapted to be sealingly mounted to the process vessel opening. The rod has a first end coupled to the probe connector and a second end adapted to couple with a transmitter connector body. A rigid, electrically insulating spool is fastened in the passageway, with an outer spool surface fitting tightly to a wall of the passageway and an axial hole fitting tightly to the rod.

US Patent:

63253917, Dec 4, 2001

Filed:

Apr 28, 1999

Appl. No.:

9/301419

Inventors:

Dennis J. Smith - Minneapolis MN
Randall C. Olson - Prior Lake MN
Steven D. Kruse - Bloomington MN

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

F16J 1508

US Classification:

277650

Abstract:

A process seal made of a material such as polytetrafluoroethylene is used as a microwave window in a radar tank level gauge. The periphery of the process seal is surrounded by a metal containment ring that is fitted to the periphery to limit the amount of expansion outwardly of the process seal material as well as provide for localized loading at the periphery for clamping pressures on the seal. Electromagnetic radiation shielding is provided not only by the containment ring, but also by an EMI shielding O-ring mounted in a groove on a sealing end of the containment ring. A process environmental O-ring is carried by the process seal in an outer shoulder groove that is enclosed by the containment ring.

US Patent:

52722970, Dec 21, 1993

Filed:

Nov 23, 1992

Appl. No.:

7/979922

Inventors:

Matt Reichow - St. Paul MN
Randall M. Olson - Plymouth MN

Assignee:

General Electric Company - New York NY

International Classification:

H01H 1506
H02B 108

US Classification:

200549

Abstract:

An air conditioning disconnect switch utilizes a ramped movable contact arrangement for slidably opening and closing the switch contacts without the requirement of a removable type pull-out handle. A plastic face plate covering the switch terminals allows the use of a metallic case of reduced depth. The slidable contact arrangement eliminates the bumped cover projection otherwise required with the pull-out handle.

US Patent:

59556846, Sep 21, 1999

Filed:

Jan 6, 1997

Appl. No.:

8/779321

Inventors:

James L. Gravel - Prior Lake MN
Steve D. Kruse - Roseville MN
Randall C. Olson - Prior Lake MN

Assignee:

Rosemount Inc. - Eden Prairie MN

International Classification:

G01D 2100

US Classification:

738665

Abstract:

A modular probe that is used for determining levels in a process material container, bins, pipes, using capacitance, micro impulse radar, or other types of signals, and which has a self contained pressure seal in the probe. The probe mounts to a connector that has an explosion proof barrier. The connector in turn supports a transmitter housing, which can be made explosion proof as well. The probe is coupled to the connector in a manner so that they can be easily separated and replaced without altering the explosion proof barrier. An independent seal on the probe itself permits the probe to be installed in a tank prior to the transmitter installation, and the transmitter may be uncoupled from the connector and replaced with a new transmitter without affecting the explosion proof portion of the assembly. The transmitter housing may also be removed or replaced from service without disassembly of the housing while the probe remains installed in a tank or other location undisturbed until the transmitter is replaced. Further, an environmental seal between the probe and the connector may be replaced without removing the transmitter housing from the connector so the explosion proof barrier for the transmitter housing remains effective.