VIBRATION PUMP Russian patent published in 1994 - IPC

FIELD: pump engineering. SUBSTANCE: pump has case with working chamber 15 having suction opening 18 and delivery branch pipe 20. Piston 4 is received in chamber 15. A vibration drive is separated from delivery chamber 19 by shock-absorber 9 and provided with cable 12 having grounding wire 1 and screw 5 which is set by head 8 to shock-absorber 9 by using insert 10 and spring-loaded by spring 7. Deflection of the spring is grater by several times than axial displacement of screw 5 at self-unscrewing at a value of the space between insert 10 and the shock-absorber. EFFECT: enhanced reliability. 1 dwg