Abstract: An encapsulated shock absorber of an aircraft undercarriage includes a sliding rod slidably mounted in a leg strut of the undercarriage and an inner cylinder extending inside the strut. The inner cylinder is fastened to the strut via a top end, and the rod slides around the inner cylinder. The inner cylinder is terminated inside the sliding rod by a diaphragm that defines an oil chamber in the shock absorber and inside the sliding rod. A mixed oil/gas chamber is located in the inner cylinder, and an expansion chamber extends between the sliding rod and the inner cylinder. A hole being made in the inner cylinder in register with the expansion chamber is connected by a pipe to a pressure sensor situated outside the strut. The pipe extends inside the inner cylinder from the hole to the top end of the inner cylinder.

Abstract: A paint spray gun comprises a body having a compressed air supply to atomize paint from a paint source external to the gun. The gun has a needle which is spring urged forwardly and retractable by a trigger to control the opening and closing of a nozzle in a spray head. There are two sealing joints between the needle and the body of the spray gun, and they surround a portion of the needle which is upstream from the paint in the direction that the paint flows along the needle and out the nozzle. A sealing cartridge comprises a cylindrical body enclosing the two sealing joints surrounding the needle, and a prestressed compression spring surrounds the needle and is disposed between the two joints and urges the two joints away from each other against solid surfaces that deflect the joints into sealing contact with the needle. A needle support in the form of a single piece opens at one end in the spray head and at its other end contains the sealing cartridge.