Bellows

About: Bellows is a research topic. Over the lifetime, 15312 publications have been published within this topic receiving 73914 citations.

Variable-length dip tube for a fluid transfer container

Abstract: A dip tube ( 10 ) of variable length which can be connected to a valve or pump and be inserted through an opening in the top end of a container to accommodate full extraction of liquid contents from containers of varying height. The variable length of the dip tube is accomplished by making the dip tube in two sections, the shorter lower section ( 14 ) of a flexible plastics material and comprising a flexible bellows portion ( 16 ) that contracts and extends in length while over the lower end ( 20 ) of the longer section ( 12 ), in a freely moving but directionally guided manner, so that the flexible bellows cannot bend excessively. The bellows portion allows the length of the dip tube to vary so that its lower end ( 28 ) contacts the bottom of the container. It is adapted to be used in returnable circuit containers for dangerous goods, fitted with dry-break or dripless valves.

Pneumatic suspension system

Abstract: A pneumatic suspension system forming a McPherson strut has a pneumatic suspension pot with an integrated strut bearing, pneumatic suspension bellows made of an elastomer material, a pneumatic suspension piston, an outer guide and a damping device. The essential features of the system are: the pneumatic suspension bellows have an inclined loop whose effective diameter defined by the top and bottom extremes of the loop is substantially perpendicular to the force application line. The outer surface of the pneumatic suspension piston has cylindrical and conical parts which form a rolling contour which is not rotationally symmetrical with respect to the damping axis and which is adapted to the effective diameter of the inclined loop of the pneumatic suspension bellows in that the effective diameter is substantially parallel to the preferably rounded edges of the rolling contour. The outer guide completely surrounds the inclined loop of the pneumatic suspension bellows during both rebound and spring deflection.

Vacuum lifting unit including a suction cup

Abstract: A vacuum lift is formed with an upper housing cover shaped portion having a central opening in which travels a vertically movable piston rod which has a piston disk at its lower end adapted to be selectively positioned to open or close an aperture in a suction disk having an encircling gasket. An enlarged evacuated volume is provided within the housing cover by expanding a plurality of diaphragm sheets into a bellows. The lowermost diaphragm sheet is connected directly to the suction disk and the uppermost diaphragm sheet is connected to and lifted by the piston rod to expand the bellows. The piston disk is formed with an air valve which is positioned by an automatic switching device operable with vertical movement of a draw bar positioned within the hollow piston.

Lifting mechanism for vacuum device

Abstract: PURPOSE: To provide a lifting mechanism for a vacuum device without the lower part of a vacuum chamber being complicated with a metallic bellows and an air cylinder. CONSTITUTION: A substrate holder 34 is fixed to a supporting cylinder 31 lifting up and down in two stages, and four substrate supporting pins 41 are provided so as to be vertically passed through the peripheral part of the holder. A flange 42 is furnished at the upper end of the pin 41 and a flange 43 at the lower end. A coiled spring 47 carrying a pin receiver 45 is inserted into a spring hole 49 in the base of a vacuum chamber 12 directly below the pin 41.

Bellows units for a chamber of a liquid-propellant rocket engine with afterburning

Abstract: A device comprises a bellows with protective rings arranged between corrugations of the bellows Support rings are connected in a sealed manner to a gas line and a combustion chamber A gimbal ring is positioned outside the bellows and via hinges is connected to structural brackets with support rings A shield is mounted inside the bellows, the shield consisting of two cylindrical envelopes telescopically inserted one in another with a gap The cylindrical envelopes are fixed in cantilever to support rings, forming a chamber which via channels for feeding a cooling working medium made in the support rings is connected to a main line for feeding the cooling working medium, and via the gap between the envelopes—to the cavity of the bellows unit A housing is arranged outside the protective rings and adjoining them, and is made in the form of a metallic cylindrical helix, the ends of which are connected to the support rings (FIG 2 )