An electrically conductive membrane pressure switch, such as a graphene membrane pressure switch. The electrically conductive membrane pressure switch includes an electrically conductive membrane, source, drain plane, actuator, and movable element (such as a piston element). The actuator drives the movable element to create a pressure differential that moves the suspended section of the electrically conductive membrane between its on, off, and neutral states.

A pressure switch is provided and includes an elastic membrane disposed such that pressure from fluid within a fluid path deforms the elastic membrane toward a plunger, thereby moving the plunger. The plunger is disposed between the membrane and an upper plate and is moveable along an axis extending between the membrane and the upper plate. A threshold pressure on the membrane from the fluid within the fluid path deforms the membrane, thereby moving the plunger toward the upper plate.

In a method of manufacturing a diaphragm with a contact, contact stocks each forming a movable contact on a stock formed out of a strip-shaped thin metal sheet material, or a rolled material are bonded at predetermined intervals to the stock by resistance welding, for example to form a diaphragm stock with a contact. Next, the stock of a diaphragm with a contact is subjected to continuous blanking with a predetermined diameter from each movable contact as center to produce a diaphragm with a contact.

Systems, methods, and apparatuses for regulating the delivery of negative-pressure therapy are described. The system includes a negative-pressure source, an energy source, and a switch. The switch can include a first conductor electrically coupled to the negative-pressure source, a second conductor electrically coupled to the energy source, and a diaphragm having a first position electrically coupling the first conductor to the second conductor and a second position separated from the first conductor and the second conductor. The diaphragm is configured to move between the first position and the second position in response to a differential between a control pressure and a therapy pressure.

In one example embodiment, a vibration apparatus can augment and enhance negative-pressure therapy systems. The apparatus can be attached to an external surface of a dressing, fluid conductor, or other components. The apparatus can generate low-amplitude vibrations, which can be transmitted through the components. Kinetic energy of the oscillations can agitate fluid in the components, which can lower the viscosity of the fluid and reduce the frequency of blockages in fluid conductors. Vibrations may also agitate a tissue site, which can encourage blood flow and granulation.

A pressure switch for controlling application of negative pressure to dressing disposed adjacent a tissue site is disclosed. The pressure switch comprises a body having a base, sidewalls extending from the base to an open end, and an inlet coupled to the dressing and forming a passage through the body. The pressure switch further comprises a diaphragm closing the open end of the sidewalls and forming a vacuum chamber with the body, wherein the inlet fluidly couples the vacuum chamber and the dressing. The pressure switch further comprises a valve disposed in the passage and configured to restrict the flow of gas through the passage so that a switch pressure developed in the vacuum chamber as a result of the application of negative pressure to the dressing lags a wound pressure at the tissue site to delay, wherein the diaphragm is adapted to be operatively responsive to the switch pressure to move between a relaxed position and a compressed position as the negative pressure increases and decreases. This pressure switch further comprises a switching element coupled to the diaphragm to turn on the negative pressure in the relaxed position and turn off the negative pressure in the compressed position. In another example, a method for controlling application of negative pressure to dressing disposed adjacent a tissue site using a pressure switch is disclosed. In another example, a system for applying negative pressure to a tissue site using a pressure switch is disclosed.

A modular wall paneling system includes at least two plates. Each plate defines a longitudinal length, and each plate has a plurality of fixture apertures disposed through the plate along the longitudinal length. Each plate has a plurality of panel apertures disposed through plate along the longitudinal length. The plurality of fixture apertures are generally parallel to the plurality of panel apertures. Included are a plurality of panels, each panel having a panel substrate and each panel having at least two hooks disposed on a backside of the panel substrate. Each of the at least two hooks are configured to removably lock into the panel apertures of the at least two plates.

A current interruption device includes: a deforming plate configured to deform when the internal pressure of the casing rises above the predetermined level; a conducting plate which configures the current path; and a contact plate. The conducting plate includes a first contact portion configured to contact the contact plate. The contact plate includes a second contact portion configured to contact the first contact portion. The deforming plate includes a pressure receiving portion configured to receive the internal pressure of the casing and a contacting portion configured to contact the first contact portion. The second contact portion is configured to be separated from the conducting plate by deformation causing the contacting portion to move toward the contact plate. The deforming plate is insulated from the conducting plate and the contact plate. The conducting plate is disposed to be interleaved between the deforming plate and the contact plate.

A pressure switch is disclosed. The pressure switch includes a housing and a pressure-receiving chamber that communicates with a duct to which an operating pressure is supplied. The pressure switch also includes a diaphragm assembly with a diaphragm that is displaced in response to a pressure inside the pressure-receiving chamber. The pressure switch also includes a movable contact that comes into contact with a fixed contact accommodated in a center portion of an inside of the housing when the pressure inside the pressure-receiving chamber is above a certain value. One of the movable contact and the fixed contact has radially diverging contact faces that are arranged such that contact between the fixed contact and the moveable contact can be established with at least two of the radially diverging contact faces at the same time.

A pressure sensitive device includes a ring having a central axis, first side and second side. The ring includes a dielectric portion parallel to the central axis and between the first and second sides. A flexible membrane is connected to a periphery of the ring on the first side, the flexible membrane including a conductive portion. A perforated membrane is connected to a periphery of the ring on the second side. The perforated membrane is spaced apart and electrically isolated from the flexible membrane by the ring below a threshold pressure differential across the pressure sensitive device. The perforated membrane includes an opening therethrough and a conductive portion facing and corresponding to the conductive portion of the flexible membrane such that a threshold pressure differential across the pressure sensitive device causes deflection between the conductive portions of the flexible membrane and the perforated membrane to change an electrical property.