A diaphragm pressure gauge, in which a measuring spring is monitored in regard to integrity in that on the side, facing away from the process pressure, of the measuring spring a vacuum chamber is formed to which vacuum is applied and which is controlled by means of a vacuum monitoring device to maintain the vacuum.

Pressure indicator comprising a base, a deformable membrane fixed to the base in a fluid-tight manner according to a closed contour, and a body fixed to the base, delimiting a hollow volume covering the deformable membrane on the side opposite the base, while encompassing at least the closed contour, at least one inlet for a fluid the pressure of which is to be measured in a pressure range, wherein the deformable membrane is such that the expansion thereof for said pressure range is sufficient to be visible to the naked eye and to allow a direct display indicative of the pressure, in that the base is drilled with at least one first hole a first end of which emerges between the deformable membrane and the base in the closed contour, in that the body is drilled with at least one second hole a first end of which emerges into said hollow volume, in that the other end of the first hole is linked to the inlet respectively to the open air, in that the other end of the second hole is linked to the open air, respectively to the inlet, so that a pressure, respectively a pressure reduction, of fluid at the inlet causes an expansion of the deformable membrane in the hollow volume delimited by the body. Application of such an indicator to the monitoring of the inflation of a medical apparatus pad.

A pressure indicator: a body having a pressure chamber which has an inlet for communication with a fluid; a resilient diaphragm having a periphery sealed against the body and having one side thereof exposed to the fluid within the chamber; an indicating arm having an inner end which is integrally formed with the other side of the diaphragm and an outer end arm which is adjacent to a scale, the arrangement being such that pressure of the fluid within the chamber causes resilient deformation of the diaphragm which in turn causes the outer end of the arm to move relative to the scale thereby indicating the pressure of the fluid in the chamber.

The present invention provides a pressure gauge, including: a housing, defined with an axial direction and a radial direction, and including internal space, an opening, and a through hole, where the opening communicates with the internal space along the axial direction, and the through hole communicates with the internal space along the radial direction. Compared with the prior art, the present invention has the following beneficial effects: the thickness of the pressure gauge can be further reduced, the first channel can further block the force equalized plate in the radial direction, to enable the force equalized plate to be firmly positioned.

An air pump assembly includes; a main air pump in a chamber; and an air pressure adjustment assembly including: a housing in the chamber; a flexible board defining a first chamber on a first side of the board and a second chamber on a second side of the board, the first chamber in fluid communication with an inflatable chamber of the inflatable product, and the second chamber in fluid communication with an exterior of the inflatable product. The adjustment assembly further includes: an adjusting device including a positioning component and an elastic member on the second side of the board, the elastic member disposed between the positioning component and the board, and a position of one end of the elastic member defined by the positioning component; and a driving device coupled to the positioning component to thereby drive the positioning component to move relative to the housing.

A sensor includes a housing having a body, a plurality of ports, and a plurality of cavities. The ports include a first port and a second port, and the cavities include a first cavity disposed in the first port and a second cavity disposed in the second port. The sensor includes a first diaphragm disposed in the first port and enclosing the first cavity and a second diaphragm disposed in the second port and enclosing the second cavity. The first diaphragm and the second diaphragm are coplanar with one another in a first plane. The sensor includes a die disposed in the first cavity and having a membrane that is deflectable according to a differential pressure between a first pressure in the first cavity and a second pressure in the second cavity. The die is attached to the housing along a second plane parallel to the first plane.

The flow channel unit includes: a pair of end flow channels disposed at an inflow port and an outflow port, respectively, and extending along in flow direction; a center flow channel including a pressure receiving portion having a thin film shape and disposed at a position sandwiched between the pair of end flow channels, a distance from an inner peripheral surface of the pressure receiving portion to an outer peripheral surface thereof being shorter than a distance from an inner peripheral surface of the pair of end flow channels to an outer peripheral surface thereof. The pair of end flow channels and the center flow channel are integrally formed of a flexible resin material, and the pressure detection portion is disposed such that the pressure of the fluid circulated through a flow channel is transmitted via the pressure receiving portion.

An over-pressure indicator, including a cup-shaped body having, on its bottom, a hole inside which is sealably housed a mobile element loaded by a spring towards the bottom of the cup-shaped body, the mobile element facing an indicator sensitive part for communication with an area where pressure verification is wanted. The mobile element coupled with a signaller of a movement thereof. The spring pressed by a pre-loading ring nut screwed onto the cup-shaped body. The nut torsionally removably coupled with a calibration cap of the indicator. The calibration cap having at least one stop that, when it abuts against a portion of the cup-shaped body, limits further screwing of the nut thus determining pressure beyond which mobile element movement is allowed. The movement causing intervention of the indicator so by coupling the suitable calibration cap and indicator and screwing it in fully, setting the indicator intervention pressure is possible.

An apparatus having a bottom assembly with a fitting for interfacing to connect the bottom assembly to a second structure, having an elastic element that, when sufficient force is applied via the process of mating the bottom assembly to the second structure, and at an appropriate pressure value, passes from a first stable position, through a threshold, and to a second position, creating a tactile or audible indication that the apparatus has been properly installed.

An apparatus having a bottom assembly with a fitting for interfacing to connect the bottom assembly to a second structure, having an elastic element that, when sufficient force is applied via the process of mating the bottom assembly to the second structure, and at an appropriate pressure value, passes from a first stable position, through a threshold, and to a second position, creating a tactile or audible indication that the apparatus has been properly installed.