US 12,482,619 B2
Two wire pressure indicating switch with all electronic architecture with millivolt operating supply
Robert Andrew Guziak, West Mifflin, PA (US)
Assigned to Hydra-Electric Company, Burbank, CA (US)
Appl. No. 17/921,311
Filed by HYDRA-ELECTRIC COMPANY, Burbank, CA (US)
PCT Filed Apr. 27, 2021, PCT No. PCT/US2021/029301
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2021/222176, PCT Pub. Date Nov. 4, 2021.
Application 17/921,311 is a continuation of application No. 16/859,858, filed on Apr. 27, 2020, granted, now 11,264,193, issued on Mar. 1, 2022.
Prior Publication US 2023/0178317 A1, Jun. 8, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01L 5/1623 (2020.01); H01H 9/16 (2006.01); H01H 35/24 (2006.01); G01L 27/00 (2006.01)
CPC H01H 35/24 (2013.01) [G01L 5/1623 (2020.01); H01H 9/16 (2013.01); G01L 27/007 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A two wire detection circuit powered system comprising:
an electronic switch circuit configured to sense a pressure level relative to a predetermined value and indicate an open or closed switch condition based on the pressure level, wherein the electronic switch circuit further comprises:
a pressure sensing device configured to sense the pressure level and generate a sense element signal indicating the sensed pressure level;
a comparator device configured to receive the sense element signal from the pressure sensing device and generate a control signal, wherein the control signal indicates the detected pressure level as higher or lower than a preset threshold; and
an electronic pressure switch configured to receive the control signal from the comparator device, wherein the electronic pressure switch is turned on or off based on the control signal, and wherein power is derived from a sense circuit; and
an energy harvester configured to convert an indication of the open or closed switch condition from the electronic switch circuit to an operating signal for the electronic switch circuit to operate, wherein the operating signal drives electronic components of the electronic switch circuit in addition to a power source.