A pressure gauge has a shell, a scale panel, an index pointer, a piston set, and a gear transmission set. The shell has a front end board, a back end board, and a piston base mounted on the inner surface of the back end board. The scale panel is mounted between the front end board of the shell and the back end board of the shell. The index pointer is mounted on a front surface of the scale panel. The piston set is mounted in the piston base of the shell. The gear transmission set is mounted between the back end board of the shell and the scale panel.

A hybrid pressure and flowguage regulator apparatus includes a regulator body, an inlet, and an outlet assembly. The outlet assembly includes a first orifice of a first size, a second orifice of a second size that is larger than the first size, and a mechanism that automatically moves the first orifice between a first position and a second position. When the first orifice is in the first position, the flow of gas passes through both the first orifice and second orifice. When the first orifice is in the second position, the flow of gas bypasses the first orifice and flows through the second orifice with a specific flow rate or a second pressure that is less than the first pressure. The apparatus may also include a gauge that provides a visual indication of both the specific flow rate and the second pressure.

A hybrid pressure and flowguage regulator apparatus includes a regulator body, an inlet, and an outlet assembly. The outlet assembly includes a first orifice of a first size, a second orifice of a second size that is larger than the first size, and a mechanism that automatically moves the first orifice between a first position and a second position. When the first orifice is in the first position, the flow of gas passes through both the first orifice and second orifice. When the first orifice is in the second position, the flow of gas bypasses the first orifice and flows through the second orifice with a specific flow rate or a second pressure that is less than the first pressure. The apparatus may also include a gauge that provides a visual indication of both the specific flow rate and the second pressure.

A pressure gauge attachment system includes a thread having a thread stop as well as at least one engagement element that is configured to defect during installation and effectively provide an interlock after installation. The system is suited for rapid and simplified installation, inherently provides automatic orientation of a pressure indicator, enhanced sustainability, flexibility in manufacturing, as well as provides a secure, reliable fluid-tight sealed connection that does not rely upon a pipe thread, additional couplings or clamping nuts for retention.

A pressure gauge attachment system includes a thread having a thread stop as well as at least one engagement element that is configured to defect during installation and effectively provide an interlock after installation. The system is suited for rapid and simplified installation, inherently provides automatic orientation of a pressure indicator, enhanced sustainability, flexibility in manufacturing, as well as provides a secure, reliable fluid-tight sealed connection that does not rely upon a pipe thread, additional couplings or clamping nuts for retention.

A battery powered device includes a battery and a motor controller that is coupled to the battery. A motor is operably coupled to the motor controller. The motor controller is configured to detect an amount of available power from the battery and engage the motor based on the amount of available power.

A battery powered device includes a battery and a motor controller that is coupled to the battery. A motor is operably coupled to the motor controller. The motor controller is configured to detect an amount of available power from the battery and engage the motor based on the amount of available power.

An oil sensor attachment structure includes a guide projection disposed on an upper surface of an oil passage body and a sensor case. The guide projection includes a pair of first walls, a pair of first protrusions protruding toward each other, and a second wall. A receiving portion having a first receiving opening is provided between the first walls. The second wall faces the first receiving opening in a second direction with a gap therebetween. The sensor case includes a columnar portion, a flange protruding from the columnar portion, and a facing portion that is connected to the flange and that protrudes to a position above the flange. Each of the first protrusions has a first surface facing toward the other side in the second direction. The facing portion is disposed on the other side of the first surface in the second direction and faces the first surface.

An optical reading device for a pointer instrument which has a pointer and a scale face or dial with different degrees of reflectance in each case, includes an illumination device for illuminating the scale face or dial and a plurality of light sensor elements which are arranged in a circular arc about the rotational axis of the pointer in order to detect the light of the illumination device reflected back by the scale face or dial, wherein the illumination device is configured to uniformly illuminate the scale face or dial and each light sensor element is configured with an isosceles triangle outline, where each light sensor element is offset with respect to one another by half of the base width in the circumferential direction of the circular arc.

An optical reading device for a pointer instrument which has a pointer and a scale face or dial with different degrees of reflectance in each case, includes an illumination device for illuminating the scale face or dial and a plurality of light sensor elements which are arranged in a circular arc about the rotational axis of the pointer in order to detect the light of the illumination device reflected back by the scale face or dial, wherein the illumination device is configured to uniformly illuminate the scale face or dial and each light sensor element is configured with an isosceles triangle outline, where each light sensor element is offset with respect to one another by half of the base width in the circumferential direction of the circular arc.