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TODAY’S PATENT- MODULAR TRANSMITTER

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TODAY’S PATENT- MODULAR TRANSMITTER

In today’s patent, we will discuss Roger L. Frick (Chanhassen, MN), Dean S. Pierce (St. Paul, MN), David A. Broden (Chanhassen, MN)’s invention, “MODULAR TRANSMITTER” (US4833922A), which was patented by the USPTO on May 30,1989.

The present invention relates to a modular transmitter including a transmitter sensor body, and a transmitter isolator body which are coupled together to make a transmitter. A transmitter provides an output that indicates  pressure and has two modular transmitter bodies, one including a sensor, and the other one having an isolator diaphragm with a substantially non-compressible fluid that shifts movement of the isolator diaphragm to the sensor. The bodies each have mating passageways to transfer non-compressible fluid from one body to the other and are assembled together using a ring of extrusive material disposed around the mating portions of the passageways to seal the passageways together when the transmitter bodies are assembled. The isolation fluid is filled in the passageway of the bodies before the first and second transmitter bodies are assembled. The assembly can be accomplished without complex procedures and still insure that accurate transmitter operation will be obtained.

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