Abstract: A flexible conduit construction having an inner flexible tubular member and having an outer flexible tubular member telescoped about the inner tubular member with the internal peripheral surface of the outer tubular member being in spaced relation from the other peripheral surface of the inner tubular member throughout the length of the inner tubular member to protect the same, a coiled compression spring being disposed about the inner tubular member in spaced relation therewith and radially engaging the internal peripheral surface of the outer tubular member to hold the internal peripheral surface of the outer tubular member in spaced relation relative to the outer peripheral surface of the inner tubular member even though the tubular members are disposed in various arcuately flexed conditions thereof. The outer tubular member is under axial tension between its opposed ends so as to radially contract and thereby be disposed in radial compression against the coiled compression spring.

Abstract: A fluid mixing valve construction having a housing provided with a pair of inlets respectively interconnected by a pair of valve seats to an outlet and with a valve member operated by a condition responsive unit for controlling the valve seats in accordance with the condition of fluid passing to the outlet and sensed by the condition responsive unit. A second condition responsive unit is operatively interconnected to the valve member to close one of the valve seats with the valve member if the first mentioned condition responsive unit does not close the one valve seat with the valve member even though the same is sensing a condition that would require the first mentioned condition responsive unit to close the one valve seat whereby the fluid mixing valve construction is substantially fail-safe.

Abstract: A fluid mixing valve construction having a housing provided with a pair of inlets respectively interconnected by a pair of valve seats to an outlet with a valve member operated by a condition responsive unit for controlling the valve seats in accordance with the condition of fluid passing to the outlet and sensed by the condition responsive unit. A second condition responsive unit is operatively interconnected to the valve member to close one of the valve seats with the valve member if the first mentioned condition responsive unit does not close the one valve seat with the valve member even though the same is sensing a condition that would require the first mentioned condition responsive unit to close the one valve seat whereby the fluid mixing valve construction is substantially fail-safe.

Abstract: A roll over valve construction having a housing provided with an inlet and an outlet separated by a valve seat. A pair of balls are carried by the housing so that one thereof can move to close the valve seat when the valve construction is rotated from its normal position to a certain other rotational position thereof, the pair of balls normally being held away from the valve seat by gravity when the valve construction is between the normal position thereof and the certain position thereof. A larger ball member is carried by the housing for preventing the first pair of balls from moving to close the valve seat when the valve construction is between the normal position and the certain position thereof even though the valve construction is being subjected to shocks, impacts, bouncing, etc. that would normally cause one of the pair of balls to move to close the valve seat.