Valveless Patents (Class 73/242)
  • Patent number: 10215561
    Abstract: A method of designing a container of a liquid reflection inclination sensor includes a liquid surface calculating step (S1) that calculates a shape of a liquid surface of a liquid in a horizontal direction “x” and a vertical direction “y” by utilizing the Young-Laplace formula and the hydrostatic pressure formula, the liquid surface formed on a plate extending vertically and infinitely with respect to a horizontal part of the liquid surface, an optical simulation step (S2) that obtains a light receiving pattern by reflecting a dark field pattern (4?) irradiated from an imaginary light source (2?) on an imaginary mirror plane (9a?) having the shape of the liquid surface, and a container adjusting step (S3-S4) that adjusts a shape of a cylindrical container (10) for enclosing the liquid by judging whether image accuracy of the light receiving pattern satisfies demanded sensor accuracy.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: February 26, 2019
    Assignee: TOPCON CORPORATION
    Inventors: Homare Momiyama, Akinobu Sugiura, Hideyuki Matsumoto
  • Patent number: 7516023
    Abstract: A modular system and method is provided for enabling remote configuring and ordering of flowmeters in a client-server environment. The system includes a meter selection module configured to enable a user to select from a plurality of flowmeter types. A process data module receives process data from a client and a fluid selection module coupled to the process module is configured to receive a process fluid selection and to calculate properties thereof. A sizing module generates parameters of at least one sized flowmeter, sized in accordance with the received process data. A material selection module provides a list of materials from which the sized flowmeter may be fabricated, and a fluid rating module rates compatibility of the various materials with the process fluid selection. A results module is configured to generate data corresponding to expected performance of the sized flowmeter.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: April 7, 2009
    Assignee: Invensys Systems, Inc.
    Inventors: David A. Ferreira, Wade M. Mattar
  • Patent number: 7197408
    Abstract: A modular system and method is provided for enabling remote configuring and ordering of flowmeters in a client-server environment. The system includes a meter selection module configured to enable a user to select from a plurality of flowmeter types. A process data module receives process data from a client and a fluid selection module coupled to the process module is configured to receive a process fluid selection and to calculate properties thereof. A sizing module generates parameters of at least one sized flowmeter, sized in accordance with the received process data. A material selection module provides a list of materials from which the sized flowmeter may be fabricated, and a fluid rating module rates compatibility of the various materials with the process fluid selection. A results module is configured to generate data corresponding to expected performance of the sized flowmeter.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: March 27, 2007
    Assignee: Invensys Systems, Inc.
    Inventors: David A. Ferreira, Wade M. Mattar
  • Patent number: 5211180
    Abstract: A respiratory test apparatus for lung function comprises a chamber into which air can be blown by a subject to displace a piston. The chamber communicates with a space shielded from the incoming air flow to provide a measure of the static air pressure in the chamber, a pressure transducer providing an input of that pressure value a data processor. The data processor is arranged to provide outputs indicative of such functions as a subject's peak respiratory flow rate and the volume of air exhaled.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: May 18, 1993
    Assignee: Clement Clarke International Limited
    Inventors: Basil M. Wright, Derek P. Hutchison
  • Patent number: 4993262
    Abstract: Apparatus 1 for monitoring flow of fluid, such as domestic water, along a conduit 2 comprising a piston and cylinder arrangement 3 having a plurality of free pistons 4 and 5, and port means 6 which are so arranged with respect to the pistons 4 and 5 that an inlet port is always open during strokes of each piston 4 or 5 so that fluid flow is continuous along the conduit 2.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: February 19, 1991
    Inventor: Andrew M. Storrar
  • Patent number: 4043198
    Abstract: A valving member is carried within the bore of a meter body having inlet and outlet ports. Chambers are formed within the bore on opposite sides of a piston slideably disposed about the valving member. In response to movement of the piston, valving member shifts axially within the bore to establish sequential periodic communication between alternate chambers and the inlet and outlet ports. After each shift, the valving member is latched by magnetic means.
    Type: Grant
    Filed: November 19, 1976
    Date of Patent: August 23, 1977
    Inventors: Logan W. Stillwell, George K. Riffle