A pressure sensing metal diaphragm configured for deforming according to a pressure is provided, including: a main body, extending flat, including a through hole and a go-through structure configured for insertion of a movable. A pressure sensing diaphragm assembly including the pressure sensing metal diaphragm and a pressure sensing non-metal diaphragm is further provided, wherein the pressure sensing non-metal diaphragm covers the go-through structure. A pressure gauge including the pressure sensing diaphragm assembly is further provided.

A method and device for preserving wine or other oxygen sensitive items is disclosed. In some embodiments, the device has a housing, a pressure indicator, a pressure sensor, and a one-way valve. The housing is configured to seal an opening of a wine bottle. The housing has a closure side configured to be in communication with an interior of the wine bottle. The housing has an input channel extending through the housing. The pressure sensor is within the housing and is in communication with the closure side. The one-way valve is in the input channel. The pressure sensor is configured to move the pressure indicator to an indicating position when a predetermined amount of pressure is reached at the sensor.

A method of preserving an oxygen sensitive item is disclosed. The method involves injecting at least 0.15 gram of an inert gas into a container comprising the oxygen sensitive item and oxygen, without raising a pressure within the container above 10 psig, to form a barrier layer of the inert gas between the oxygen sensitive item and the oxygen in the container without displacing all of the oxygen from the container.

Provided is a seal (21, 121) for a depth gauge (1) of axis of revolution (Z) including a radially inner flank (213, 223) and a radially outer flank (214, 224), such that the radially inner flank (213, 223) of said seal (21, 121) has a height (h1) greater than a height (h2) of the radially outer flank (214, 224).

A pressure sensing metal diaphragm configured for deforming according to a pressure is provided, including: a main body, extending flat, including a through hole and a go-through structure configured for insertion of a movable. A pressure sensing diaphragm assembly including the pressure sensing metal diaphragm and a pressure sensing non-metal diaphragm is further provided, wherein the pressure sensing non-metal diaphragm covers the go-through structure. A pressure gauge including the pressure sensing diaphragm assembly is further provided.

An improved structure of pressure gauge includes a bottom case, a pressure measurement assembly, a rotating assembly, a fulcrum piece, a coil spring, a scale meter, and an outer case. The pressure measurement assembly is installed above the bottom case and the surface thereof is shaped with concentric circular waves. The rotating assembly includes a sleeve body and a central rod. A fulcrum piece is installed across between the sleeve body and the central rod. A plurality of through holes and a coil retaining base are provided on the fulcrum piece. One end of the coil spring is screwed onto the coil slot and the other end thereof is installed on the coil retaining base. The outer case is located in the outer area of the bottom case and the fulcrum piece. A transparent cover body is installed on top of the outer case.

A connection structure of a diaphragm pressure gauge contains: a holder, a coupling sleeve, a disc, a curved abutting bar, a fixing element, a case, a screw element, a circular film, and a defining element. The holder is connected to the coupling sleeve, multiple spaced ribs of the holder extend out of the coupling sleeve, and the holder includes the multiple spaced ribs. One of the multiple spaced ribs has at least one spaced protrusion, the disc includes at least one first locating orifice, the curved abutting bar includes a second locating orifice, and the at least one first locating orifice is fitted with the second locating orifice. The curved abutting bar abuts against the fixing element, and the defining element, the circular film and the screw element are connected below the fixing element to produce the diaphragm pressure gauge. The case is covered on the diaphragm pressure gauge.

Provided is a pressure detection device including: a pressure detection unit; a flow passage unit; and a mounting unit configured to removably mount the flow passage unit on the pressure detection unit. The pressure detection unit has a pressure detecting diaphragm and a sensor rod arranged at the center part of a first surface of the pressure detecting diaphragm, protruding toward the flow passage unit along a first axis orthogonal to the pressure detecting diaphragm, and having a top surface orthogonal to the first axis. The flow passage unit has a flow passage diaphragm, and a displacement of the flow passage diaphragm in contact with the top surface is transmitted to the pressure detecting diaphragm via the sensor rod in a state where the flow passage unit is mounted on the pressure detection unit by the mounting unit.

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.

The present invention discloses a diaphragm type ultra-thin pressure gauge, including a mounting base, a gauge core inner cover and an elastic diaphragm. The gauge core inner cover includes an inner cover body portion covering on the top surface of the mounting base and an inner cover edge portion located at the outer side of the lower end of the inner cover body portion. An edge of the elastic diaphragm is fixedly clamped between an inner side of the inner cover edge portion and the top surface of the mounting base. The mounting base and the gauge core inner cover are made of a hot-melt plastic. The outer side of the inner cover edge portion is in hot-melt adhesion with the top surface of the mounting base. A diaphragm central hole is provided in the middle of the elastic diaphragm.