Abstract: An inflatable ball with a digital pressure display including a ball body, and a pressure display mechanism disposed in the ball body. The pressure display mechanism includes a pressure sensor and a display. The sensor may detect the pressure of air inside the ball body, and the display indicates the air pressure value, so that the user may know the amount of air pressure in the ball body any time.

Abstract: A pressure gauge has a housing unit which includes an air inlet, an air outlet, an air chamber communicated fluidly with the air inlet, and a pressure relief chamber communicated fluidly with the air chamber via a pressure relief passage and with the outlet via a check valve. An adjustment rod is threaded on the housing unit and can be rotated so as to move in the housing unit. A reed spring is carried on the adjustment rod by a spring carrier and pushes a ball to close the upper end of the pressure relief passage. When the air pressure of the air chamber exceeds a preset value which corresponds to the position of the adjustment rod relative to the housing unit, the ball is pushed upward to disengage from the upper end of the pressure relief passage so as to permit excessive air to flow from the air chamber to the outlet.

Abstract: A signal generating pressure gauge includes a pressure indicating unit having a housing provided with an inlet, a pressure-value indicating panel, a pressure converting unit fluidly communicated with the inlet and provided with a rotary shaft which rotates in response to pressure entering into the inlet, a pointer which rotates with the rotary shaft in order to indicate on the indicating panel the pressure imposed on the inlet, and an electrically conductive pressure control needle movable together with the pointer. An adjustable pressure-setting mechanism includes a rotary plate rotatably mounted in the housing and rotatable relative to the indicating panel, and electrically conductive low-pressure and high-pressure stop units which extend into a setting hole unit in the rotary plate. The positions of the low-pressure and high-pressure stop units in the setting hole unit are adjustable and correspond to the lower and upper limits of a desired pressure range.

Abstract: A pressure gauge of a tire pressure indicator for a set of pneumatic tires of a vehicle includes a casing having a hollow adaptor to be attached to the pneumatic tire, an inlet and a finger piece for opening an inflating valve of the tire, and a signal generating device disposed in the casing. The signal generating device includes a pressure sensing unit which generates an analog voltage signal that varies in accordance with pressure imposed on the inlet, a signal converting unit for converting the analog voltage signal into a digital output signal, and an encoder unit for comparing the digital output signal of the signal converting unit with high pressure and low pressure limits of a predetermined normal operating pressure range, and for generating a coded signal which includes the digital output signal when the digital output signal is not within the operating pressure range.

Abstract: A diaphragm type pressure measuring device including a conical diaphragm having a top and a peripheral bottom edge, a pressure probe raised from the top of the conical diaphragm, a guard connected to the peripheral bottom edge of the conical diaphragm and disposed around the pressure probe and having an upright top flange raised from the periphery of a top rim thereof, and a cover adapted for covering on the upright top flange of the guard, wherein when an air pressure is applied to the conical diaphragm, the pressure probe is forced by the conical diaphragm to to cause a movement subject to the value of the applied air pressure.

Abstract: A shoe including a shoe body having an outsole defining a receiving chamber, and an upper fastened to the outsole; an insole formed as an air bag filled with air; and a pressure gauge mounted on and exposed from the upper of the shoe body and connected to the insole to measure the pressure applied to the insole.

Abstract: An electronic step counting shoe which includes a shoe body holding a fluid container, a pressure sensor, a temperature sensor, a circuit board, and a LCD, the circuit board having a pressure converter connected to the pressure sensor, a temperature compensating circuit connected to the temperature sensor, and a microprocessor, the pressure converter and the temperature compensating circuit converting pressure and temperature signals from the pressure sensor and the temperature sensor into corresponding electric signals for processing into corresponding digital signals by the microprocessor, permitting the digital signals thus obtained to be shown through the LCD through the control of a function switch.

Abstract: A shoe including a shoe body having an outsold and an upper fastened to the outsole; an insole formed as an air bag filled with air and mounted within the outsole; a pressure inductor connected to the insole to detect the pressure applied to the insole; a circuit board mounted in the insole and consisting of a pressure converter and a microprocessor, the pressure converter converting the pressure detected by the pressure inductor into a frequency signal to be processed by the microprocessor so that the microprocessor obtains a value corresponding to the pressure applied to the insole; and a liquid crystal display connected to the microprocessor to display the value obtained by the microprocessor.

Abstract: An electronic hand-muscle developer which includes a casing having a connector; a hollow flexible grip filled up with air and connected to the connector; a pressure inductor mounted in the connector to detect pressure from the hollow flexible grip; a pressure converter circuit mounted in the casing and connected to the pressure inductor to converts the pressure signal detected by the pressure inductor into a frequency signal; a microprocessor mounted in the casing to receive the frequency signal from the pressure converter, and to calculate the frequency signal so as to obtain a value; and a liquid crystal display connected to the microprocessor to display the value obtained by the microprocessor.

Abstract: A pressure gauge reset mechanism including a cylinder having a pressure measuring head at one end, a piston forced by a first spring toward the pressure measuring head, a toothed pressure rod extending out of the cylinder, an actuating rod member having one end stopped at the piston and an opposite end fixedly connected to the toothed pressure rod, a second spring fixedly connected to the actuating rod member to push it upwards against the piston, and a pressure gauge coupled to the cylinder, the pressure gauge having an index shaft with a gear meshed with the toothed pressure rod, and a torsional spring mounted on the inside to hold down the index shaft and having one end stopped at the inside of the pressure gauge and an opposite end extending out of the pressure gauge and fixedly connected with a button, wherein the second spring member is compressed and the index shaft is turned by the toothed pressure rod to move the index of the pressure gauge when the piston is forced by the pressure being applied to t

Abstract: A pressure gauge includes a housing, a Bourdon tube with a closed end, an adjustment rod mounted rotatably in the housing, a microswitch installed on the adjustment rod, a gear, a sector wheel meshing with the gear, and a crank member interconnecting the sector wheel and the closed end of the Bourdon. Increase of the air pressure inside the Bourdon tube activates a portion of the assembly of the Bourdon tube and the sector wheel to contact the microswitch, so as to stop supply of compressed air from a pressure source to an article which is measured by the gauge. The adjustment rod can be rotated relative to the housing so as to change the distance between the microswitch and the portion of the assembly, thereby adjusting the preset upper limit value of the air pressure inside the Bourdon tube.

Abstract: An apparatus includes an elongated tube having an air outlet end adapted to be connected to an inflatable article and an air inlet end adapted to be connected to a compressor for supplying compressed air to the inflatable article. The tube has a surrounding wall formed with a radial hole. A flexible bidirectional valve unit is disposed fittingly in the tube and includes a cup-like first check valve member located adjacent to the radial hole. The first valve member opens downwardly and has a base end and an opposite flaring end which contacts tightly and normally an inner surface of the surrounding wall so as to prevent air flow from the inlet end to the outlet end of the tube. The valve unit further includes a cup-like second check valve member which opens upwardly and which is connected integrally to the base end of the first valve member for preventing air flow from the outlet end to the inlet end of the tube.

Abstract: A pressure gauge includes a housing unit and a membrane which has a periphery secured to an inner wall of the housing unit, so as to define an air chamber under the membrane in the housing unit. The membrane has a central portion which can move upward in the housing unit in response to increase in air pressure of the air chamber. An adjustment rod has an externally threaded portion extending through and engaged threadably within the threaded hole of a guiding member which is secured in the housing unit. A microswitch is installed on a lower end portion of the adjustment rod and is connected electrically to a pressure source which supplies compressed air into an article to be measured by the gauge. The movement of the adjustment rod relative to the guiding member moves the microswitch in the housing unit to a predetermined position which corresponds to a preset upper limit value of air pressure of the air chamber.

Abstract: A tunable tire pressure indicator includes an elongated hollow casing and a valve-actuating member mounted to an upper end of the casing. A piston is provided movably in the casing near the valve-actuating member. A plug unit is mounted in a lower end of the casing. A spring is provided in the casing between the piston and the plug unit. A pressure indicating rod is disposed in the casing. The piston pushes the rod to extend out of the casing through the plug unit against action of the spring to provide a tire pressure reading in response to pressure entering the casing. The plug unit includes a movable member formed with a passage to permit the rod to extend slidably therethrough and to permit rotation of the movable member with the rod, and a stationary member mounted securely in the lower end of the casing and formed with a through-hole larger than cross-section of the rod to permit passage of the rod therethrough.

Abstract: A coupling device for a pressure gauge includes an upper positioning plate connected spacedly to a lower positioning plate, a sector gear disposed between the lower and upper positioning plates and mounted rotatably thereto, an adjustment plate mounted adjustably on a top side of the sector gear, a push rod with a first end adapted to be in force-transmitting relationship with an actuating unit of a pressure gauge and a second end connected to the adjustment plate, a pinion meshing with the sector gear and to be mounted with an indicator needle of the pressure gauge thereon, a support plate mounted on a bottom side of the lower positioning plate for supporting distal bottom ends of axles of the sector gear and the pinion thereon, and a spiral spring for biasing the pinion to rotate the indicator needle to a starting position.

Abstract: An illuminated umbrella includes a shank with upper and lower end portions, a plurality of ribs connected pivotably to the upper end portion of the shank at one end thereof, a slidable ring member sleeved on the shank, and a plurality of spreaders which are connected pivotally to a periphery of the ring member at one end and which are connected pivotally and respectively to the ribs at the other end. A hollow telescopic tube is made of a material that permits passage of light therethrough. The hollow telescopic tube is sleeved on the shank and has a first end portion secured to the slidable ring member and a second end portion connected securely to the lower end portion of the shank. A light generating unit is mounted on the lower end portion of the shank and is activable so as to emit and project light into the hollow telescopic tube via the second end portion of the tube.

Abstract: A digital pressure gauge includes a casing having a pressure sensitive member which responds when pressure is passed therethrough and a digital display member electrically connected to the pressure sensing member. The gauge includes an insulating rod which engages the pressure sensitive member and which contacts a weight sensing member in response to pressure flowing through an inlet so as to expand the pressure sensitive member.

Abstract: A pressure gauge includes an alarm generating device which is actuated by a modified pressure indicating stick upon detection of an insufficient or overinflated pressure condition within a tire. The pressure checking operation is possible even if there is inadequate surrounding light and the gauge can be checked without the need for reading the pressure indicating stick or an associated scale dial.