Measuring and testing – Blower – pump – and hydraulic equipment
Patent
1982-04-07
1984-08-14
Swisher, S. Clement
Measuring and testing
Blower, pump, and hydraulic equipment
G01M 1900
Patent
active
044649312
ABSTRACT:
An apparatus and method for checking the operation of a fluid flow and/or pressure control member with a given and constant flow, wherein the control member is disposed at the outlet of a main fluid circuit connected to a source of pressurized fluid and a bypass circuit at its inlet and having a fluid bleed circuit with an isolation device at its outlet upstream from the control member. The main circuit includes a flow meter, a pressure meter, a progressive volume variation member to enable the pressure in the main circuit to be varied gradually and without fluctuations, and isolation devices for isolating the volume variation member from the control member and for isolating the inlet of the main circuit from the fluid source and the bypass circuit. Electrical comparators, triggered at different times in response to the actuation of different ones of the components of the apparatus are employed for comparing the pressure in the main circuit with reference pressures for checking the operation of the control device.
REFERENCES:
patent: 2364709 (1944-12-01), Greer
patent: 3098382 (1963-07-01), Hoffman et al.
patent: 4181017 (1980-01-01), Markle
T. T. Evans, Hydraulics and Pneumatics, vol. 30, No. 7, Jul. 1977, pp. 91-93.
501 Robinette S.F.R., S.A.
Swisher S. Clement
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