FIELD ROCK TESTER Russian patent published in 1994 - IPC

FIELD: field rock testing. SUBSTANCE: all limiters 18 are switched off during test with continuous sinusoidal load cycles. Weight 14 is displaced from equilibrium position and released. Weight 14 under action of spring 20 reciprocates together with bar 15, deforms spring 17 and transmits force through bar 10 and torque link 4 to punch 3 and wall of well 2. For testing with discrete load cycles, motion of bar 15 is confined between limiters. For this purpose, corresponding coils 19 are deenergized. As a result, transmitted to bar 10 is incomplete sinusoidal load cycle. Device enable testing in transition from continuous to discontinuous load cycles. EFFECT: higher efficiency. 1 dwg