Pressure gauge calibrating device

A pressure gauge calibrating device, comprising:

• a calibrator body;
• a means for connecting the calibrator body to an external source of pressurized fluid;
• a variable pressure chamber formed in the calibrator body, said variable pressure chamber being in fluid communication with the external source of pressurized fluid;
• a means mounted in said variable pressure chamber for regulating pressure buildup in the variable pressure chamber;
• a means carried by said calibrator body connecting said variable pressure chamber to a master gauge and to a device to be calibrated;
• a means for pressurizing said variable pressure chamber comprising a piston means movable within a piston chamber means, a first valve means mounted in said piston chamber means for admitting outside air into the piston chamber means and a second valve means mounted between said piston chamber means and said variable pressure chamber for transferring the admitted air into the variable pressure chamber, said piston means comprising a pair of piston members, each piston member sliding within a corresponding piston chamber, each of said piston chambers being in an independent fluid communication with the variable pressure chamber and with an exterior of said calibrator body, and wherein said piston members are mounted for coaxial simultaneous movement with each other on a piston arm extending between the piston members.

A pressure gauge calibrating device, comprising:

• a calibrator body;
• a means for connecting the calibrator body to an external source of pressurized fluid, said means comprising a cutout formed in a lower portion of said calibrator body;
• a variable pressure chamber formed in the calibrator body a distance away from said cutout, said variable pressure chamber being in fluid communication with the external source of pressurized fluid through a passageway extending from said cutout;
• a means mounted in said variable pressure chamber for regulating pressure buildup in the variable pressure chamber, said pressure regulating means comprising an elongated sleeve provided with two open ends, an insert mounted in each of said open ends, said sleeve being slidably movable within said variable pressure chamber in response to manipulation of an adjustment knob mounted on an exterior wall of said calibrator body;
• a means carried by said calibrator body for connecting said variable pressure chamber to a master pressure gauge and to a device to be calibrated;
• and
• a means for pre-pressurizing said variable pressure chamber, said pre-pressurization means comprising a pair of piston members, each piston member sliding within a corresponding piston chamber, each of said piston chambers being in independent fluid communication with a variable pressure chamber and with an exterior of the calibrator body, and wherein said piston members are mounted for coaxial simultaneous movement with each other on a piston arm extending between the piston members.

A pressure gauge calibrating device, comprising:

• a calibrator body;
• a means for connecting the calibrator body to an external source of pressurized fluid, said means comprising a cutout formed in a lower portion of said calibrator body;
• a variable pressure chamber formed in the calibrator body a distance away from said cutout, said variable pressure chamber being in fluid communication with the external source of pressurized fluid through a passageway extending from said cutout;
• a means mounted in said variable pressure chamber for regulating said pressure buildup in the variable pressure chamber, said pressure regulating means comprising an elongated sleeve provided with two open ends and an insert mounted in each of said open ends, said sleeve being slidably movable within said variable pressure chamber in response to manipulation of an adjustment knob mounted on an exterior wall of said calibrator body;
• a means carried by said calibrator body for connecting said variable pressure chamber to a master pressure gauge and to a device to be calibrated;
• and
• a means for pressurizing said variable pressure chamber with ambient air prior to admitting pressurized fluid from the external source of pressurized fluid comprising a pair of piston members, each piston member sliding within a corresponding piston chamber, each of said piston chambers being in independent fluid communication with the variable pressure chamber and with an exterior of the calibrator body.