Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1988-04-11
1989-09-12
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73834, 73837, 73845, G01N 330
Patent
active
048648663
ABSTRACT:
In accordance with the present invention, a low in weight, portable, mechanical property testing machine is provided in which no special testing machine foundation is required, and a standard power supply may be used. The applied load to test the specimen is applied by the action of a rod making a single stroke within a cylinder containing hydraulic fluid. The inside diameter of the cylinder is significantly greater than the diameter of the rod. The hydraulic fluid transmitted from the cylinder is substantially ripple free and applies an even load to the specimen being tested through a second fluid cylinder and piston acting therein. The use of valves, as used in the prior art may thus be avoided, thus achieving simplicity of operation. To absorb the shock created by the specimen breaking, a dash pot is provided out board of the second piston as a shock absorber. When the specimen being tested is a threaded fastener, the fastener is gripped by a collet made of two threaded and tapered longitudinally split, pieces held together with a spring. As a load is applied to the specimen, the two collet pieces are locked together by the tapers, assuring thread alignment. The split collar also preferably has different threads per inch at each end of the collet pieces to adapt to different threads of different specimens. Split collars of different geometry are used to test thin, non-threaded specimens.
REFERENCES:
patent: 1445963 (1923-02-01), LaBatt et al.
patent: 3142980 (1964-08-01), Andersen
patent: 3203232 (1965-08-01), Lehnig, Jr.
patent: 3559472 (1971-02-01), Thompson, Jr.
patent: 3916679 (1975-11-01), Voll et al.
patent: 4554838 (1985-11-01), Paus
Kobayashi, H. et al., In Situ Tensile . . . Spectroscopy, Rev. Sci. Instrum. 51(5), May 1980, pp. 632-637.
Greenslade Joe E.
Hardy Raymond D.
Cummings Henry W.
Myracle Jerry W.
LandOfFree
Mechanical property testing machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mechanical property testing machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanical property testing machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-907812