Inflatable device

An inflatable device comprising:

• a carcass having an inner layer surface, an outer layer surface opposite to said inner layer surface, and an inner peripheral wall surface extending from said inner layer surface along an axis through said outer layer surface and confining an inlet hole;
• a tubular elastomeric member of a single piece construction, inserted into said carcass via said inlet hole, and including a bottom wall having a periphery and a valve slit which extends therethrough in an axial direction parallel to the axis, and a tubular wall extending from said periphery of said bottom wall toward said inner peripheral wall surface and surrounding the axis to form a first inner surrounding wall surface which confines a receiving hole that communicates with said valve slit, said tubular wall terminating at an upper surrounding end which is disposed to be secured relative to said inner peripheral wall surface;
• and
• a tubular rigid stem made from a material more rigid than that of said elastomeric member, and inserted into said receiving hole in the axial direction from said upper surrounding end, said rigid stem having a first outer surrounding wall surface which is dimensioned to abut against said first inner surrounding wall surface, and which has upper and lower ends that are disposed opposite to each other in the axial direction and distal and proximate to said bottom wall respectively, said lower end being spaced apart from said slit in the axial direction, said tubular stem further having a second inner surrounding wall surface opposite to said first outer surrounding wall surface in radial directions relative to the axis and surrounding the axis, said second inner surrounding wall surface confining a passage which communicates with said valve slit and said inlet hole so as to admit air into said carcass via said passage.