Residual Pressure Release Valve

FIG. 1 is a front, top and right side perspective view of a residual pressure release valve showing my new design; FIG. 2 is a rear, bottom and left side perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a top plan view thereof; FIG. 6 is a bottom plan view thereof; FIG. 7 is a left side view thereof; FIG. 8 is a right side view thereof; FIG. 9 is a reference perspective view thereof showing a state where a locking member is attached to a handle thereof; and, FIG. 10 is another reference perspective view thereof showing another state where the locking member is attached to the handle thereof. The broken lines depict portions of the residual pressure release valve that form no part of the claimed design. In FIG. 9 and FIG. 10 , the broken lines illustrating a locking member represent environment of the claim that forms no part of the claimed design.