Bellows

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

Air-bag elevated dump vehicle

Abstract: A dump vehicle comprising a dump body pivotally mounted on the vehicle chassis frame for movement between a horizontal normal position and an inclined dumping position using an air bag or air bellows assembly as a means of power to raise and lower the dump body. The dump body is so pivoted and the air bellows is so disposed between the body and the chassis frame that maximum lift is obtained with a minimum stroke of the air-bag assembly. The air-bag assembly consists of two or more air bags stacked in endto-end relationship to obtain maximum lift. A stabilizer plate is disposed between the adjacent ends of the two bags and is hinged at the pivot point of the dump body so as to prevent undue lateral displacement of the bag assembly as the bags are expanded into an arcuate body with its axis concentric with the hinged or dump axis.

Annihilation of shocks in forced oscillations of an air column in a closed tube.

Abstract: Effects of a periodic array of Helmholtz resonators on forced longitudinal oscillations of an air column in a closed tube are examined experimentally. The column is driven sinusoidally at a frequency near the lowest resonance frequency by oscillating bellows mounted on one end of the tube. Frequency responses are obtained for small and large amplitudes of the excitations. While the array lowers the resonance frequency and the peak value, its dispersive effect, i.e., the dependence of the sound speed on a frequency, can annihilate the shock effectively.

Safety debris collecting device

Abstract: The present invention relates to a modular safety debris collecting device for a hand held rotary power tool especially for drilling into construction material such as ceiling, walls, floors, studs, drywall, concrete, wood, metal and masonry. The collecting device protects the power tool or power drill operator and anyone nearby from flung or falling debris ejected from the tool's rotary work element or drill bit. The device has 3 basic modular detachable units, elastic adaptor, flexible, resilient and compressible bellows and debris collector end section. The collector end section stores the adaptor and bellows when not in use.

Sound-insulator for pile hammer

Abstract: PURPOSE:To improve working efficiency, by a method wherein a surrounding part, which is formed by a resilient material and formed in the shape of bellows, is located around a pile, a space between the pile and the surrounding part is filled with liquid, and gas is mixedly present in the liquid. CONSTITUTION:Sound insulating cylinders 9 and 9a, which is formed by a resilient material and is formed in the shape of bellows, are secured around a pile 2, and the sound-insulating cylinders are lifted and disposed in a position togetherwith a pile hammer 1. Thereafter, after, with a pump 5-1 driven, water is poured in the sound insulating cylinder 9a side through a water inlet hole 6, the pile 2 is driven through the working of the hammer 1. Simultaneously, with an air compressor 10 driven, an air 11 is sucked in water around the sound insulating cylinder 9. This causes vibration, produced along with driving of the pile 2, to be absorbed and damped by means of the sound insulating cylinders 9 and 9a, and causes damping of water hammer by dint of air bubbles.

Air duct assembly for engine

Abstract: An air duct assembly supplies air from an air cleaner housing to an engine throttle and includes a first duct connected to the air cleaner housing and a second duct connected to the engine air intake. Open ends of the first and second ducts are spaced from one another and the second duct has a flared bell mouth at its open end. The second duct includes a sleeve that defines an attenuation chamber. A flexible bellows overlies the first and second ducts and the sleeve, and extends across the space between the first and second ducts to provide an airtight connection therebetween and flex during relative motion between the air cleaner housing and the engine air intake. A hydrocarbon adsorbing material can be housed within the attenuation chamber.