Abstract: A valve assembly for a patient support having a mattress including a bladder comprises an interior housing formed to include a supply chamber, an exhaust chamber, a plenum, and an exterior housing surrounding the interior housing. A supply valve and an exhaust valve are located in the interior housing and connect the supply chamber and the exhaust chamber, respectively, to the plenum. A supply solenoid and an exhaust solenoid are coupled to the interior housing and covered by the exterior housing. The supply solenoid and the exhaust solenoid are coupled to the supply and exhaust valves respectively.

Abstract: A gas safety valve comprises a main body, a valve seat, a restraining member, and an engaging member. The main body includes an inner threading for threading engagement with the valve seat and the restraining member. The valve seat comprises a valve block, a spring, and an adjusting element. The position of the adjusting element can be adjusted when an elastic constant of the spring is not within a predetermined operational range, a distance between the valve block and the valve seat is thus varied to assure blockage of a longitudinal through-hole of the valve seat by the valve block, thereby preventing mass leakage.

Abstract: A diaphragm valve assembly includes a valve housing having two or more fluid ports and defining both a valve chamber extending therebetween for fluid flow therethrough and an access port leading into the valve chamber. A bonnet covers the access port and defines an opening therein through which a valve stem arrangement extends. The valve stem arrangement includes a valve seat disposed within the valve chamber. The valve stem arrangement is slidable through the opening in the bonnet between a first position, wherein the valve seat is disposed in sealing engagement with a fluid port to thereby define a closed position of the valve assembly, and a second position, wherein the valve seat is disengaged from the first fluid port to thereby define an open position of the valve assembly. A diaphragm surrounds and is attached to the valve stem arrangement to form a seal therewith.

Abstract: An activating pin which comprises a valve part, the piston part comprises within it a channel, the cross-section of said channel is, at least one part of said piston part, consisting of sectors, wherein in each sector the distance between the center point of the channel cross-section and the outermost limiting surface of the channel is larger than the corresponding distance measured along the line separating the sector from an adjacent sector, and said valve part is positioned movably with respect to said piston part between a first valve position and a second valve position for enabling the conduction of gaseous and/or liquid media through said channel when said valve part is in said first valve position, and inhibiting the conduction of gaseous and/or liquid media through said channel when said valve part is in said second valve position.

Abstract: An air valve connection head is compatible with a variety of air pumps and is formed of a first housing member and a second housing member. The first housing member is provided at one end thereof with an insertion hole in which the second housing member is lodged, and at other end thereof with a connection hole engageable with a cylindrical tube of the air pumps. The first housing member is further provided with a first air duct in communication with the connection hole and the insertion hole. The second housing member is provided with a receiving cell which is in turn provided at one end with a fitting port for receiving the air valve of an inflatable object. The receiving cell is provided at other end with a control handle pivoted thereto. The receiving cell is provided with an air injecting mechanism which is controlled by the control handle to lash securely and open up the air valve.

Abstract: An inventive dual plate check valve is provided which comprises a central anchoring fixture and an elastomer hinge fixed to the central anchoring fixture by a center post clamp. Two opposing sections of the elastomer hinge are formed on opposing sides of the center post clamp, and at least one disc member is attached to each opposing section of the elastomer hinge to form a valve plate which is pivotable about the center post clamp. In one embodiment, the central anchoring fixture forms projections on opposing sides of the center post clamp such that the lower edges of the valve plates are prevented from sliding off of the upper surface of the central anchoring fixture. In another embodiment, a stop pin is provided which extends vertically between the valve plates.

Abstract: A valve for controlling fluids, in which the valve member is adjusted by means of an actuating piston, which, together with a piezoelectric actuator piston, encloses a pressure chamber. In addition, the actuator piston and an affiliated piezoelectric stack are disposed in parallel radially next to the actuating piston, wherein upon excitation of the piezoelectric stack or adjustment of the actuator piston, the actuating piston executes a motion counter to the adjusting movement, and with its valve member, opens a relief bore.

Abstract: A microvalve for controlling a fluid flow comprises a valve body provided with a valve opening having a sealing edge, and a valve plate provided with fluid openings. The valve plate is adapted to be moved perpendicularly to the valve body in such a way that, at a first position, said valve plate closes the valve opening, whereas, at a second position, it is perpendicularly spaced from said valve opening in such a way that a flow cross-section defined by said valve opening and said valve plate is decisively determined by the distance between the sealing edge and the valve plate. The contour of the sealing edge of the valve opening is chosen such that the length of the sealing edge exceeds the length of a sealing edge of a square valve opening which is equal in area.

Abstract: A dual gain pressure control solenoid having two individually wound coils. One coil has a greater number of turns than the other coil and operates as a high force coil. The coil with a lesser number of turns operates as a low force coil. The low force coil provides improved resolution over a predetermine range of input current, while the high force coil provides less resolution but greater force. The coils may be used in various operational modes in order to achieve improved resolution over a predetermined current range.

Abstract: A new Portable Tubeless Tire Inflating System for forcing a large volume of air into a tubeless tire which presses the side-walls of the tire against the rim, thereby setting a bead so the user may fully inflate the tire using a conventional valve stem. The inventive device includes a conventional portable air tank and an air releasing means attached to the conventional portable air tank providing a burst of air to a tire during mounting.

Abstract: A device capable of preventing deformation of an inflating valve on an inflatable article, includes a solid plug member for press-fitting into an air inlet of the inflating valve, a protective ring to be sleeved on a flexible plug unit of the inflating valve, and a connecting section which is disposed between the solid plug member and the protective ring. The connecting section has a length sufficient to straighten a connecting portion of the inflating valve between a flexible valve body and the flexible plug unit once the solid plug member is press-fitted into the air inlet and the protective ring is sleeved on the flexible plug unit.

Abstract: A multi-purpose pneumatic tool combining the functions of an air blow gun, an air regulator, a tire chuck and a swivel connector includes a casing, a control body and a bolt assembly. The control body is provided with respective holes and connectors for screwably locking an air blow gun, a control body, a tire chuck and a control button. A bolt assembly couples the casing to the control body such that the control body and the casing may rotate freely with the bolt assembly as a pivotal center. The air blow gun may also perform free rotation along another axis. The multi-purpose pneumatic tool may also assembly to other tool to widen its applications.

Abstract: A pumping device includes a main body having a passage defined therein through which air passes and a head connected to the main body. A retainer is slidably received in the head and includes a first compartment defined therein for receiving a spring. An end of the retainer includes a conical recess defined therein. A nozzle is slidably mounted in the end of the retainer and includes an end attached to the spring. A nozzle head is securely mounted in an end of the head and includes a second compartment defined therein and in communication with the first compartment via the nozzle. The nozzle head includes a hollow conical section for engaging with the conical recess of the retainer. A lever is provided for switching the retainer between a first operative position in which the first compartment communicates with the passage and a second inoperative position in which the first compartment does not communicate with the passage.