Bellows

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

Blood collection device

Abstract: This device is for taking a sample of blood from a patient and dispensing a predetermined volumetric sample for analysis A blood collection needle is in fluid communication with the interior of a closed longitudinally collapsible container such as a bellows having substantially rigid ends The bellows is elastically compressed from its normally extended position to decrease the interior volume and it is temporarily secured in the compressed position Once the needle is in place for drawing blood, the bellows is manually released and its elastic extension assists in withdrawing a sample Samples from the device are dispensed by recompressing the bellows so that some of the blood overflows through a passage into a "ladle" in the top portion of the container A measured sample is then withdrawn by removing the cap from an outlet tube from the ladle A plurality of outlet tubes may be used for samples of different predetermined volumes If desired, an auxiliary sample can be withdrawn by way of a T adjacent the needle The T can be used for dispensing a sample without measurement or a controlled volume can be dispensed from another exit aperture in related embodiments

Fluid dispensing apparatus

Abstract: A fluid dispensing apparatus ( 10 ) comprising a collapsible bellows ( 12 ) for storing the fluid to be dispensed, a housing ( 14 ) for receiving the collapsible bellows and means ( 30 ) for compressing the collapsible bellows on actuation of the fluid dispensing apparatus ( 10 ) so as to eject the fluid through an outlet ( 22 ) of the bellows ( 12 ), wherein the housing ( 14 ) is configured to guide the bellows ( 12 ) so as to impede lateral deformation of the bellows ( 12 ) during compression thereof.

Breathing indicator and ventilator

Abstract: The device indicates the instantaneous volume of gases being breathed by a medical patient, and provides a means for "ventilating" the patient; i.e. causing the patient to breathe artificially. A pair of bellows is provided. The first bellows is pneumatically connected to the patient's respiratory system. The first bellows expands when the patient exhales in a closed system, contracts when the patient inhales or gases are forced into the patient's lungs. The second bellows is mechanically coupled to but pneumatically isolated from the first bellows. The second bellows preferably is connected to a manual resuscitation squeeze-bag which can be used to expand the second bellows and thereby compress the first bellows and force gases into the patient's lungs, thus ventilating the patient. An automatic non-rebreathing valve is used to ensure independent operation of the second bellows and the bag. The bellows are mounted so as to expand and contract along an arcuate path. An indicator indicates the excursions of the first bellows, and thus indicates the instantaneous volume of flow. Movement of the bellows along an arcuate path provides mechanical amplification of the movement of the indicator, thus giving improved resolution and accuracy. A disposable liner is provided for the first bellows so that the bellows itself will remain isolated from the gases breathed by the patient, and will be relatively easy to keep clean. Preferably, the second bellows has a cross-sectional area considerably smaller than that of the first, so that only a relatively small flow of gas from the squeeze-bag is effective to force a substantially greater volume of gas into the patient's lungs. Thus, the double-bellows arrangement serves as an amplifier for the squeeze-bag. In one embodiment of the invention, the movement of the bellows is in a vertical plane, and in another embodiment the movement is in a horizontal plane. An accumulator is used to indicate the total flow of gas breathed by the patient, and a timing device is used to indicate the "minute volume" of ventilation, i.e., the flow rate. An especially advantageous bellows construction is used.

Air spring device for load-carrying vehicles

Abstract: The invention relates to an air spring for transport vehicles comprising a vessel ('piston') (10) of rigid, pressure-resistant material, such as steel, and a bellows (9), fitted onto the vessel ('piston') (10), of e.g. nylon-reinforced rubber, being in pneumatic connection with the 'piston' (10) and connected to a source of compressed air. The invention is characterised by the 'piston' (10) being provided with an air shut-off valve (13) in the opening (12) towards the bellows (9).

Tube element with one metal bellows

Abstract: A tube element especially for exhaust systems and exhaust recirculation systems of combustion engines in vehicles which includes at least one helically or annularly corrugated bellows provided with cylindrical end fittings on each end of the bellows; a flexible hose made of metal and situated on an interior surface of the bellows; and a braiding hose made of metal wire which coaxially encloses an exterior surface of the bellows. The braiding hose being placed on the cylindrical end fittings together with the flexible hose so that the flexible hose and the braiding hose are connected firmly and at least indirectly. The braiding hose is installed in a state of pre-setting so that the braiding hose has a reduced radial cross-section which in frictional contact with the exterior surface of the bellows.