US Patent 7168683 Oil drain valve

A drain valve to be used with numerous drain applications, such as draining fluid from an engine, includes in an exemplary embodiment a valve body, an o-ring and a cap. In another exemplary embodiment, the drain valve includes a valve body, an o-ring, a cap retainer and a cap. The drain valve eliminates the need for a tool, such as a wrench, to drain the fluid from the engine, for example. The drain valve includes a push-pull or a twist-and-pull cap feature to manipulate the valve; however, the drain cap remains on the drain valve and therefore cannot be lost or misplaced. Moreover, the drain valve includes a drain cap that is rotatable to direct the fluid flow out the valve and also provides an easy grip for opening and closing the valve.