Indicator device
First Claim
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1. An indicator device for use as a manometer, comprising:
- a housing having an inlet opening for a pressure medium to be measured and a pressurized space within the housing;
a spring-loaded control piston having an outer surface and arranged within said housing, said control piston being adapted to receive the pressure medium;
an indicator element mounted within said housing and having an inner surface;
a valve seal arranged within said housing and adapted to seal the pressurized space;
a regulating button located on the opposite side of the pressurized space from the inlet opening, said regulating button being co-planar with said housing on the opposite side of the pressurized space from the inlet opening and being axially movable and adapted to selectively ventilate the housing;
at least one projection located on one of the outer surface of the piston or the inner surface of the indicating element;
a groove located on the other of the outer surface of the piston or the inner surface of the indicating element; and
means for connecting the indicator device to a pump so that pressure can be measured during operation of the pump;
wherein the groove engages the projection and converts the stroke movement of the piston into a rotating movement of the indicator element.
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Abstract
The invention relates to an indicator device 1, especially for use as a manometer, with a housing 2 provided with an inlet for the pressurized medium to be measured and a spring-loaded piston 13 which can come into contact with the pressurized medium. The precision of the pressures indicated can be increased and the size can be made especially compact when the piston is designed as a control piston 13 and is in a working connection with an indicator element 5 via a groove and projection combination 39, 40 which translates the stroke of the control piston 13 into a rotating movement of the indicator element 5.
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Citations
11 Claims
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1. An indicator device for use as a manometer, comprising:
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a housing having an inlet opening for a pressure medium to be measured and a pressurized space within the housing; a spring-loaded control piston having an outer surface and arranged within said housing, said control piston being adapted to receive the pressure medium; an indicator element mounted within said housing and having an inner surface; a valve seal arranged within said housing and adapted to seal the pressurized space; a regulating button located on the opposite side of the pressurized space from the inlet opening, said regulating button being co-planar with said housing on the opposite side of the pressurized space from the inlet opening and being axially movable and adapted to selectively ventilate the housing; at least one projection located on one of the outer surface of the piston or the inner surface of the indicating element; a groove located on the other of the outer surface of the piston or the inner surface of the indicating element; and means for connecting the indicator device to a pump so that pressure can be measured during operation of the pump; wherein the groove engages the projection and converts the stroke movement of the piston into a rotating movement of the indicator element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification