초록 ▼

A mechanical pressure gauge indicator for showing a position of a multi-turn non-rising water valve stem is disclosed. The mechanical pressure gauge indicator uses 180 degrees of turning motion to indicate various approximations of pressure downstream of the regulating valve. One half turn of the me

A mechanical pressure gauge indicator for showing a position of a multi-turn non-rising water valve stem is disclosed. The mechanical pressure gauge indicator uses 180 degrees of turning motion to indicate various approximations of pressure downstream of the regulating valve. One half turn of the mechanical simulated pressure gauge indicator indicates ten turns of the multi-turn non-rising water valve stem.

대표청구항 ▼

[ I claim:] [1.] A mechanical pressure indicator for indicating fluid pressure downstream of a fluid control valve, comprising:a housing having indicia disposed thereon, the indicia corresponding to specific fluid pressures;a multi-turn adjustment knob for adjusting the fluid pressure, the multi-tur

[ I claim:] [1.] A mechanical pressure indicator for indicating fluid pressure downstream of a fluid control valve, comprising:a housing having indicia disposed thereon, the indicia corresponding to specific fluid pressures;a multi-turn adjustment knob for adjusting the fluid pressure, the multi-turn adjustment knob having a threaded inner shaft, the multi-turn adjustment knob being rotatable in a clockwise direction and in a counterclockwise direction over a range of positions corresponding to the indicia disposed on the housing;a threaded shaft follower fitting around the threaded inner shaft of the multi-turn adjustment knob, the threaded shaft follower having two opposing protrusions extending radially from the threaded shaft follower;two tracks formed on the housing of the mechanical pressure indicator and extending in a direction which is generally parallel to the threaded inner shaft, for accommodating the two opposing protrusions of the threaded shaft follower and for preventing the threaded shaft follower from rotating, relative to the housing, when the multi-turn adjustment knob is rotated in one of the clockwise direction and the counterclockwise direction; andan indicator cylindrical sleeve fitting around the threaded shaft follower, the indicator cylindrical sleeve having an outer surface with at least one indicator protrusion positioned on the outer surface, a position of the at least one indicator protrusion, relative to the housing, being dependent on the position of the multi-turn adjustment knob, which in turn corresponds to a fluid pressure within a range defined by the specific indicia disposed on the housing, the indicator cylindrical sleeve having an inner surface with a double-start helix groove cam positioned on the inner surface of the indicator cylindrical sleeve, the double-start helix groove cam accommodating the two opposing protrusions of the threaded shaft follower,wherein rotation of the multi-turn adjustment knob causes the two opposing protrusions of the threaded shaft follower to move within the two tracks in the direction which is generally parallel to the threaded inner shaft,wherein movement of the threaded shaft follower in the direction which is generally parallel to the threaded inner shaft causes the two opposing protrusions to move within the double-start helix groove cam, andwherein movement of the two opposing protrusions within the double-start helix groove cam causes the indicator cylindrical sleeve to rotate, the at least one indicator protrusion on the indicator cylindrical sleeve cooperating with the indicia on the housing to indicate the fluid pressure.