Patent ID: 6825770
Filing Date: 2004-11-30
Classification: A61M

Abstract:
A low pressure alarm assembly comprising:a first housing; an inlet fitting in the first housing for connecting the alarm assembly to a source of fluid pressure; a pressure responsive element in the first housing having one end in fluid communication with the source of fluid pressure and an opposite closed end movable in response to a change in fluid pressure in the fluid pressure source; a linkage assembly operably coupling the pressure responsive element to a pressure indicator for indicating the pressure in response to the movement of the pressure responsive element; an alarm energization switch in the first housing operably coupled to the linkage assembly and actuable in response to a predetermined movement of the linkage assembly for activating a low pressure alarm; and a second alarm housing separate from said first housing and containing an alarm circuit operably associated with the alarm energization switch in the first housing; wherein the first housing includes a dial face with selected pressure markings and the indicator sweeps the face in response to the movement of the pressure responsive element, the alarm energization switch having first and second contacts extending outwardly through the face of the first housing and the indicator is adapted to abut and force the second contact into abutting relationship with the first contact for closing the alarm circuit and activating the alarm in response to the movement of the indicator to a predetermined low pressure marking.