Patent ID: 6213912
Filing Date: 2001-04-10
Classification: F16H,Y10T

Abstract:
A hydraulic flow control system including:an electronically controlled hydraulic valve providing first and second hydraulic flow levels, the second flow level being substantially greater than the first;a flow control relay having an activated state and a deactivated state, the relay including a switched output line connected to the valve and establishing the second hydraulic flow level when the relay is in the activated state, and a control terminal for changing the state of the relay;a flow level selection switch connected to control terminal and having first and second positions corresponding to the first and second flow levels respectively;a power line having an on and an off condition connected to the flow control relay, wherein the relay is in the deactivated state when the power line is in the off condition; andwherein the flow control relay, once in the deactivated state, remains in the deactivated state so the second hydraulic flow level cannot be established even if the flow level selection switch is in the second position, until the position of the flow level selection switch is changed after the deactivation thereby preventing the second flow level after the power line moves to the off condition until the level selection switch is operated.