Abstract: A pivotable type ladder assembly intended primarily as a life saving device for persons who accidentally fall into the water adjacent to the marine structure of a yacht basin or small boat marina. The ladder having two parallel side rails, with upper and lower ends, joined at appropriate intervals by a plurality of perpendicular cross-members, or treads, the bottom most of which is ballasted. The ladder is connected, pivotably; to a mounting bracket suitable for attachment to a marina walkway or docking structure. The bracket having a pivot pin which articulates with a pivot hole positioned in the upper one-third of the ladder and having also at its lower extremity a cross-member to support the ladder while it is in the vertical, deployed position and to prevent side-to-side movement while the ladder is in use.

Abstract: Water well pump plunger efficiency is improved by providing a pair of upwardly open outwardly flared wall cups surrounding a pump plunger and supported in superposed relation by a sleeve in the lowermost cup. A fluid passageway through the base of the uppermost cup insures filling the lowermost cup on the plunger upstroke.