Quotables
"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
PatentStorm News
Make the Most of PatentStorm
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest patents by subscribing to an RSS feed.
Got questions? Ask a Patent Expert!
Registered users: Manage your profile, comments and alerts.
US Patent 5594666 - Mass flow control system
US Patent Issued on January 14, 1997
Estimated Patent Expiration Date:
December 19, 2014Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
December 19, 2014Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA mass flow controller includes a photoelectric transducer for receiving information through an optical fiber and an electro-optical transducer for transmitting the result of detection of the mass flow through the optical fiber, thereby transmitting and receiving information through the optical fiber. Accordingly, the transmission and reception of data between the host computer and the mass flow controller performed through the optical fiber are not affected by electro-magnetic noise. Further, the mass flow controller can include a correction device responsive to a command from the host computer for correcting the result of a detection, to thereby accurately process the result of the detection because the result of the detection is corrected as required and then transmitted to the host computer as the correct data. | InventorsApplicationNo. 358468 filed on 12/19/1994US Classes:702/100Fluid or fluid flow measurementField of Search73/204.15, Including detail of feedback or rebalancing circuitry73/861VOLUME OR RATE OF FLOWExaminersPrimary: Cosimano, Edward R.Attorney, Agent or FirmUS Patent References4527557, Medical ventilator systemIssued on: 07/09/1985 Inventor: DeVries , et al.5263369, Flow sensor system and method Issued on: 11/23/1993 Inventor: Cutler5329966, Gas flow controller Issued on: 07/19/1994 Inventor: Fenimore, et al.5469750, Method and apparatus for sensing flow in two directions and automatic calibration thereof Issued on: 11/28/1995 Inventor: Lloyd, et al.5474062, Medical ventilator Issued on: 12/12/1995 Inventor: DeVires, et al.5494028Medical ventilator Issued on: 02/27/1996 Inventor: DeVries, et al. International ClassG01F 025/00Foreign Application Priority Data1993-12-20 JP |
