Low profile pressure measure device

A blood pressure measuring device comprising:

• a housing having an interior cavity;
• a support plate disposed in said interior cavity of said housing, said support plate having a center opening;
• at least one diaphragm mounted to a bottom facing side of said support plate, said at least one diaphragm having at least one movable surface responsive to changes in pressure of an incoming fluid entering the interior cavity of said housing and a narrow elongate center portion extending downwardly with respect to said support plate, said narrow elongate center portion having an inner cavity;
• a dial face having indicating indicia mounted to a top facing side of said support plate;
• and
• a movement mechanism interconnected with said at least one movable surface of said at least one diaphragm, said movement mechanism including an axially displaceable shaft member and a thin ribbon spring member helically wound around said shaft member, said ribbon spring member having one end attached to one end of said axially displaceable shaft member and an opposing end attached to a stationary elongated hollow tubular member wherein at least a substantial axial portion of said axially displaceable shaft member and said thin ribbon spring member is disposed within said hollow tubular member, said movement mechanism being disposed through said center opening of said support plate, said housing including a narrow downwardly extending portion sized for receiving said narrow elongate center portion of said diaphragm and in which at least a portion of said movement mechanism is disposed in said inner cavity of said elongate center portion.

A pressure sensitive device comprising:

• a housing including an upper portion, a lower portion, and an intermediate portion interconnecting said upper portion and said lower portion, each of said housing portions being hollow and having an interior cavity;
• a support plate disposed in said lower portion, said support plate including a center opening aligned with said intermediate portion;
• a diaphragm assembly attached to a bottom facing side of said support plate, said diaphragm having at least one surface which is movable in response to incoming fluid entering the lower portion of said housing;
• a dial face disposed in the upper portion of said housing;
• and
• a movement mechanism interconnecting said at least one movable surface of said diaphragm, said movement mechanism including an axially displaceable shaft member and a thin ribbon spring member helically wound around said axially displaceable shaft member, said thin ribbon spring member having one end attached to one end of said axially displaceable shaft member and an opposing end attached to a stationary elongated hollow tubular hollow member having at least a substantial axial portion of said ribbon spring member and said axially displaceable shaft member disposed therein, said movement mechanism being disposed substantially within said intermediate portion of said housing, said intermediate portion being substantially narrower than said upper and lower portions.