Abstract: A gun for dispensing a fluid from a fluid dispenser has a body portion, a plunger assembly and an advancing mechanism. The body portion has a jaw portion for holding the fluid dispenser in a retained position and adapted for releasing the fluid dispenser when a specific pressure is reached in the chamber of the fluid dispenser. The body portion has a catcher portion for catching the fluid dispenser in a caught position upon being released by the jaw portion. The jaw portion has a pair of legs projecting from the body portion. Each leg has a foot projecting inwardly towards each other and spaced from the body portions, therein defining a flange receiving space. The feet are of such a length to overlie and engage a portion of a flange element of the fluid dispenser. The catcher has a pair of parallel plates; each plate has an opening for receiving the flange of the fluid dispenser in both the retained position and the caught position. The plunger assembly has a plunger rod slideably carried by the body portion.

Abstract: A hand-held device for installing caps on vials having a housing with an outer housing member and an inner housing member. The housing is sized to enable the device to be held in a hand of a user and placed over a vial to be capped. A shuttle member is rotationally disposed within the inner housing for transporting one of a plurality of caps stored in the housing from a cap storage station to a cap installation station within the housing when said device is operated. At approximately the same time, a plunger extending from an inner surface of the outer housing is installs the cap transported to the cap installation station onto a vial. Also described is a cap to be used in the hand-held device. The cap has a substantially flat endwall defining a peripheral edge surface and a sidewall extending therefrom. The peripheral edge surface defines a radius which is substantially less than 0.040 inches.

Abstract: An apparatus for measuring density of drilling mud. An elongated cylindrical measuring chamber is pivoted on a base at one end and includes conduits for introducing the mud into the chamber. A force measuring thrust a gauge mounted on the base and supporting the chamber intermediate its ends provides a signal proportional to the weight of the receptacle and its contents. Since the volume of the chamber is constant the weight varies as a function of the density of mud. A rotating wire brush mounted within the chamber tends to scrape away accumulating solid material on the inner walls thereof. The chamber is provided with a ceramic liner.