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| Number | Title | Issue Date |
| 7366625 | Method, apparatus and computer medium for correcting transient flow errors in flowmeter proving data An apparatus for increasing the accuracy of meter factors of a flow instrument in conjunction with a prover having upstream and downstream prover detection switches and a flow computer including a computer program embodied on a computer readable medium for correctin... | 04/29/2008 |
| 7114367 | Pulmonary function test calibration system and method A system for calibrating pulmonary function test equipment having syringe means, including a syringe having a cylindrically shaped sidewall, a proximal end with an centrally located orifice, a distal end with an output port, an interior cavity, and a plunger with a ... | 10/03/2006 |
| 7060036 | Respiratory oxygen consumption measuring device and method A portable apparatus for calculating respiratory oxygen consumption comprising a housing having a fluid inlet, a flow sensor, mounted within the housing, an oxygen sensor and means for calculating the respiratory oxygen consumption using data obtained from the oxyge... | 06/13/2006 |
| 5526674 | Method and apparatus for improved flow rate measurement and calibration A method and apparatus for precise measurement and calibration of gas flow rates is described. The apparatus and method employ precision-bored cylinders adapted for operation with ultrasonic transducers under the control of computer subroutines for accomp... | 06/18/1996 |
| 5052211 | Apparatus for determining the characteristic of a flowmeter A fluid flowmeter prover uses a measuring cylinder in series with a flowmeter to calibrate the flow meter. The cylinder has a piston which travels in synchronism with the fluid, the flow rate of which is to be measured. At the downstream end of the cylind... | 10/01/1991 |
| 4831866 | Automatic meter proving and calibration system An apparatus for and method of calibrating a fluid meter having an output transformable into a series of digital pulses, where each pulse represents a certain volume of liquid through the meter that changes as a result of meter wear and/or component failu... | 05/23/1989 |
| 4606218 | Compact bidirectional meter prover mechanism A compact bidirectional meter prover mechanism incorporates a straight calibration barrel having spaced detectors sensing passage of a fluid induced displacer piston. A four-way control valve is connected by flow conduits to the conduit containing the flo... | 08/19/1986 |
| 4517823 | Testing device for flowmeter A testing device for a flowmeter arranged in a pipe, has a bypass conduit connected with the pipe in which the flowmeter is arranged, a gauge container arranged in said bypass conduit and selectively connectable in series with the pipe, an element for sel... | 05/21/1985 |
| 4481805 | Meter prover apparatus and method According to the invention, fluid is adapted to flow through a piston and cylinder disposed in the housing of a meter prover. The cylinder is telescopingly received within the piston. The fluid is permitted to flow into the piston and cylinder through an ... | 11/13/1984 |
| 4481806 | Detector for a meter prover A prover detector comprising a barrel having a longitudinal bore formed therethrough to receive a proximity switch mounted in one end thereof and a piston mounted in the other end thereof to extend from the barrel bore into the prover. The proximity switc... | 11/13/1984 |
| 4475377 | Double wall meter prover Apparatus for use in calibrating a meter having an outer tubular housing closed at each end, a reduced diameter and reduced length inner tubular barrel supported within the outer house providing an annular space between the exterior of the barrel and the ... | 10/09/1984 |
| 4372147 | Flow meter prover apparatus and method A flow meter prover is disclosed which includes an outer fluid housing having an inlet and an outlet, a measuring conduit coaxially mounted within the outer housing and having first and second sets of fluid apertures adjacent, respectively, the upstream a... | 02/08/1983 |
| 4307601 | Apparatus for calibrating flow meters and the like Measuring apparatus for calibrating flow meters and the like comprising a piston slidably mounted within piston cylinder means which receives gas passing through the flow meter being calibrated to cause the piston to be lifted. A precision encoder is rota... | 12/29/1981 |
| 3955399 | Uni-directional meter prover apparatus The present invention relates to an improved uni-directional meter prover apparatus which includes a prover barrel having first and second ends, a piston disposed within the barrel which is propelled through the barrel by the flow of liquid therethrough, ... | 05/11/1976 |
