Abstract: An infant play mat with a flexible central mat portion having a fabric surface that forms a first infant play area and including multiple flexible flaps extending from straight edges of the play mat. The infant play mat has a polygonal perimeter with multiple straight edges, with two of the edges defining a corner therebetween. Multiple flexible flaps extend from a respective one of the perimeter edges and define a fold line. Each flap has an upper flap surface exposed when the flap is extended, and hidden when the play mat is folded at the fold line to cover a region of the central mat portion. The central mat portion and lower surfaces of the flaps together form a second infant play area when the play mat is folded at all of the fold lines. Two of the flaps extend from the two edges to define the corner and are shaped such that, when overlaying the central mat portion, the two flaps do not overlap.

Abstract: A pressure relief valve (10) for a pilot operated fluid system (FIG. 4) for a pressure vessel (12). Pressure relief valve (10) has a valve body (14) forming a valve chamber (16) accessible by upper cover plate (24). A cylindrical housing (32) is mounted in the valve chamber (16). A valve stem (38) has a diaphragm assembly (40) on its upper end and a valve assembly (42) on its lower end. Diaphragm assembly (40) includes a rolling loop diaphragm (44) fitting between opposed surfaces (36, 60) of housing (32) and piston member (56). A circular guide (66) on valve stem (38) fits within housing (32) for guiding the movement of the valve stem (38). Valve assembly (42) is connected to valve stem (38) about a ball and socket joint formed by ball (70) on the valve stem (38) and a socket (84) on the valve assembly (42).