Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1994-04-08
1995-08-01
Chilcot, Jr., Richard E.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73798, G01N 100
Patent
active
054371910
ABSTRACT:
A test frame has an upper end traverse, a lower end traverse below the upper end traverse, a pair of parallel upright tie rods having upper ends fixed in the upper traverse and lower ends fixed in the lower traverse, and a middle traverse between the upper and lower end traverses. Respective cylinders fixed on the middle traverse surrounding the tie rods are vertically slidable on the tie rods and each define with the respective tie rod a substantially closed chamber. A piston provided on each tie rod inside the respective cylinder subdivides the respective chamber into an upper compartment and a lower compartment. A source of fluid having a high-pressure side and a low-pressure side is connectable by a pair of respective valves to either of the respective compartments. A mechanical controller connected to both valves synchronously operates same to synchronize the position and movements of both cylinders.
REFERENCES:
patent: 2416858 (1947-03-01), Tucker et al.
patent: 2445682 (1948-07-01), MacGeorge
patent: 2854053 (1958-09-01), Salter
patent: 2999382 (1961-09-01), McClelland
patent: 3354704 (1967-11-01), Gloor
patent: 3643496 (1972-02-01), Zajic
patent: 3859848 (1975-01-01), Dripke
patent: 3994158 (1976-11-01), Weinhold
patent: 4825745 (1989-11-01), Kuttruf
patent: 5005424 (1991-04-01), Markowski
Dripke Manfred
Saum Gerhard
Chilcot Jr. Richard E.
Dubno Herbert
Olsen James M.
Wilford Andrew
Zwick GmbH & Co.
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