Patent attributes
An apparatus discloses a cam lock fitting having a check valve which can be opened or closed inside the male or female end of the cam lock fitting so that when the check valve is closed the flow from either end of the cam lock fitting can be stopped by the check valve. The check valve may be located on the male end or the female end of the cam lock fitting. If the check valve is located on the female end it is operated by an arm connected to the lever of the cam lock fitting so that when the lever is opened the check valve is closed and vice versus. Furthermore, regarding the male end of the cam lock fitting, the check valve is normally maintained in the closed position and then when the male end is inserted into the female end, the check valve is opened by a rod member making contact with the facing of the female end of the cam lock fitting so that the check valve in the male cam lock fitting is then opened. Also provided is a pressure relief valve which may be located in the wall of the cam lock fitting or in the body of the check valve which releases any vacuum built up in the hose to prevent inadvertent, pressurized discharges of liquid from a hose having a vacuum therein so as to prevent any discharges when the cam lock fitting is disconnected.
