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| Number | Title | Issue Date |
| 7373943 | Self-contained breathing apparatus facepiece pressure control method An electro mechanically-assisted control system for use in a second-stage regulator. Regulator control assembly (20′), also referred to as all-electronic (AE) assembly (20′), includes an electromechanical actuator (EMA) sub-assembly (22) for... | 05/20/2008 |
| 7171980 | Springless regulator valve assembly A valve assembly and a regulator for use therein are disclosed. The valve assembly includes a valve poppet having a first end having a first face and a second end having a second face. The first face has a surface area smaller than the surface area of the second fac... | 02/06/2007 |
| 7100628 | Electromechanically-assisted regulator control assembly An electromechanically-assisted control system for use in a second-stage regulator. Regulator control assembly (20), also referred to as EMA assembly (20), includes a mechanical actuator sub-assembly (21) and an electromechanical actuator (EMA) ... | 09/05/2006 |
| 6997206 | Pressure Compensating valve This invention relates to a pressure compensating valve and more particularly, but not exclusively, to a balanced pressure compensating valve, or regulator. The valve includes a chamber (6) for containing fluid, defined by a flexible barrier (2) trappe... | 02/14/2006 |
| 6994086 | Standby regulator for breathing system The demand regulator has a duct communicating a pressurized breathing gas admission with a tube connected to the inside of a breathing mask. Dilution air may be added to the breathing gas. A breathe-out valve opens from the tube to atmosphere. A manual control membe... | 02/07/2006 |
| 6990995 | Valve-leaf protective structure for pressure for regulator of air tank used in diving A valve-leaf protective structure for pressure regulator of air tank used in diving mainly includes a valve-leaf seat being provided at a lower center with a retaining hole and at two sides with two raised supports, each of which is provided at an upper inner surfac... | 01/31/2006 |
| 6966316 | Clean gas purge for breathing gas regulator A self contained breathing apparatus (SCBA) served by a source of breathing gas with a mask and a demand regulator connected to the mask. The regulator has a flexible diaphragmatic member having a side exposed to ambient that moves in response to pressure differenti... | 11/22/2005 |
| 6957652 | Regulator for diving Here is disclosed a regulator for diving free from any possibility that smooth operation of respective components might be obstructed due to the presence of impurities in the air supplied from an air cylinder. In the regulator, a tubular coupler member coupling a re... | 10/25/2005 |
| 6901962 | Surge prevention device A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves locat... | 06/07/2005 |
| 6792947 | Flow control valve for manual resuscitator devices An improved manual resuscitation device such as a bag-valve-mask (BVM) device with flow control valve to eliminate the danger of patient distension and aspiration of stomach contents during ventilation. The BVM having the usual patient mask with a gas inlet and flex... | 09/21/2004 |
| 6708691 | Valve and oscillator for producing a pressure waveform A valve for controlling gas flow to ventilator or physiotherapy apparatus, has a body having first and second inlet ports and an outlet port. A shutter plate is rotatable with respect to said body and adapted selectively to interconnect said inlet ports to said outl... | 03/23/2004 |
| 6634378 | Pressure reducing valve The invention relates to a pressure reducing valve having a piston-like plug, and whose output pressure is automatically controlled relative to ambient pressure, particularly for scuba breathing apparatus regulators. According to the invention, an antifri... | 10/21/2003 |
| 6622743 | Surge prevention device A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure oxygen cylinder and a medical pressure regulator. The valve also may be used for other purpo... | 09/23/2003 |
| 6527011 | Flexible retainer ring for duck bill valve An improved one-way valve for use in breathing apparatus comprising a valve housing, a one-way valve disposed in the valve housing that is in sealing contact to the valve housing, and a flexible retainer ring. The flexible retainer ring allows the one-way... | 03/04/2003 |
| 6408845 | Respiratory filter An improved respirator filter assembly includes an integral fit seal check mechanism easily controlled by the user. Upon release, the seal check mechanism permits free airflow through the filter assembly. The seal check mechanism includes an air passagewa... | 06/25/2002 |
| 6006748 | Vent valve apparatus A vent valve apparatus (10) for use with a system for supplying breathable gas pressurised above atmospheric pressure to a human or animal. The apparatus (10) includes a gas washout vent (15), a vent valve (18) adapted to progressively restrict the flow a... | 12/28/1999 |
| 5771884 | Magnetic exhalation valve with compensation for temperature and patient airway pressure induced changes to the magnetic field The exhalation valve includes a valve housing with a valve seat having an annular shoulder, and a valve poppet having a face with a corresponding annular groove. A soft flexible diaphragm seal disposed between the face of the valve poppet and the valve se... | 06/30/1998 |
| 5632298 | Resuscitation and inhalation device A resuscitation and inhalation device which can be used alternatively in each of two modes. The flow of oxygen or gas is controlled by a control valve, itself controlled by a movable member acted upon by the pressure of oxygen or gas in a chamber after ha... | 05/27/1997 |
| 5549107 | Second stage scuba diving regulator An improved second stage regulator employs a pneumatically-activated anti-set poppet and inhalation resistance adjustment control knob accessible externally of the regulator. The anti-set poppet utilizes a pressure-activated compression spring to seal the... | 08/27/1996 |
| 5497803 | Pressure regulator for the first stage of two-stage aqualungs Pressure regulator for the first stage of two-stage aqualungs, comprising a high-pressure gas inlet, a high-pressure chamber communicating with this inlet, an intermediate-pressure chamber and a reducing valve interposed between said high-pressure chamber... | 03/12/1996 |
| 5429124 | Mouthpiece for semi-closed type of breathing apparatus A mouthpiece for a semi-closed type of breathing apparatus for removing carbon dioxide from breathing air circulating from an inhaling port to an exhaling port in a breathing circuit, comprising a casing, a diaphragm which expands when the inner pressure ... | 07/04/1995 |
| 5398714 | Resuscitation and inhalation device A resuscitation and inhalation device which can be used alternatively in each of two modes. The flow of oxygen or gas is controlled by a control valve, itself controlled by a movable member acted upon by the pressure of oxygen or gas in a chamber after ha... | 03/21/1995 |
| 5357950 | Breath actuated positive pressure demand regulator with override A positive pressure demand regulator having a housing with a connection for delivering breathing gas with an outlet connected to the housing for attachment to a mask. A diaphragm is mounted in the housing and a passage connects the outlet and the diaphrag... | 10/25/1994 |
| 5265596 | Device for feeding breathing gas The expansion valve unit, coupled to a lever of a diaphragm by means of a rod unit extending through the internal cavity of the housing, includes heat exchange with the surrounding medium, a rod support at the end of the rod unit opposite the valve unit, ... | 11/30/1993 |
| 5259374 | Diver adjustable control for underwater breathing apparatus A control device for an air inlet valve to a second stage regulator for an underwater breathing apparatus which allows a diver, while wearing the apparatus, to adjust the amount of suction pressure required to activate the air inlet to his mouthpiece. The... | 11/09/1993 |
| 5259375 | Second stage scuba regulator with balanced piston volume control A second stage scuba regulator is provided which includes inlet for receiving a supply of compressed air and a piston valve in communication with the inlet for causing air flow through the regulator when the piston valve is opened. A lever is provided for... | 11/09/1993 |
| 5233976 | Second stage regulator hose with built-in cone adjusting tool A built-in regulator cone adjusting tool for a second stage regulator having a housing, an inlet port in the housing, and a cone having a front end and being disposed in the inlet port for reciprocal axial movement, the tool including a tubular body confi... | 08/10/1993 |
| 5231982 | Molded nosecup valve assembly In a gas mask, a flexible nosecup is used to prevent humid air that is exhaled from contacting the eye pieces of the mask. The nosecup is equipped with a one-way valve to allow fresh air into the nosecup. The conventional rigid valve body attached to the ... | 08/03/1993 |
| 5222490 | Breathing regulator having air injector feature A breathing system regulator for a demand breathing system has adjusting apparatus for adjusting the demand required to open the air inlet valve to permit the user to increase or decrease the tension on the biasing spring urging the valve closed, and to d... | 06/29/1993 |
| 5042525 | Regulator hanger A dust cover is provided with a transverse hook such that when the dust cover is secured in place on the first stage of a scuba regulator, the regulator assembly can be handled and hung by the hook without damage to the regulator or damage or kinking of r... | 08/27/1991 |
| 5038774 | Process and expander for supplying respiratory gas to an underwater diver An expander for compressed gas of the type having a valve 12, 13 delivering an expanded gas at 50 from a high pressure gas 6, 7, and a pilot expander 21 delivering via 41 a gaseous control charge into the compartment 17 of the principal expander. Useful i... | 08/13/1991 |
| 5035238 | Regulator second stage for scuba The regulator second stage for scuba incorporates a semi-balanced valve mechanism of high flow capacity which operates without significant influence from friction. The compression spring is suspended between two axially opposed pins to avoid friction prod... | 07/30/1991 |
| 4971108 | Inhalation responsive gas pressure regulator A breathing apparatus forms a second stage of an inhalation responsive gas pressure regulator. The inhalation diaphragm is in the form of a cylinder within which an arcuate assembly is positioned, the arcuate assembly opening a valve for permitting the in... | 11/20/1990 |
| 4899740 | Respirator system for use with a hood or face mask A portable respirator system for supplying clean, breathable air to a hood or face mask is disclosed. The system can be carried on a waist belt and includes a housing containing air inlet and outlet plenums, and a battery powered, electric motor operated ... | 02/13/1990 |
| 4856507 | Two main piloted valves demand regulator for aviators The regulator is suitable for use in a breathing apparatus, particularly for aircraft, whose oxygen source consists of an open loop generator delivering oxygen-rich air under a low and variable overpressure. It comprises a respiratory gas inlet and an out... | 08/15/1989 |
| 4796618 | Breathing regulator apparatus A breathing regulator especially suited for use in scuba diving comprises an externally adjustable flow vane or deflector to redirect a portion of inlet high velocity air towards the diaphragm of a venturi initiated vacuum assist-type regulator configurat... | 01/10/1989 |
| 4774941 | Resuscitator bag A resuscitation apparatus for use during medical procedures is disclosed. The device comprises a squeeze bag having a gas inlet and a gas outlet, and a specifically configured valve joined to the bag over the gas outlet. The valve housing includes a squee... | 10/04/1988 |
| 4712580 | Exhalation valve assembly An exhalation valve assembly for use in a volume ventilator circuit is disclosed that comprises a valve body defining a chamber with a gas inlet conduit and a gas outlet conduit, both in flow communication with the chamber. A diaphragm extends across the ... | 12/15/1987 |
| 4693242 | Coupling connectors for respirator masks This invention relates to a coupling connector attachable to and detachable from a respirator mask. The connector comprises a chamber which is arranged to be in communication with the mask in the attached position, a tube for connection to a source of pre... | 09/15/1987 |
| 4667670 | Gas flow control valves In a demand valve for breathing apparatus gas flow is controlled by a main valve disc in accordance with the pressure in a control chamber. Gas vents from the control chamber through a bleed orifice at a rate dependent upon the deflection of a diaphragm s... | 05/26/1987 |
