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	Hydraulic accumulator - Wikipedia, the free encyclopedia
		It is a pressure storage reservoir in which a non-compressible hydraulic fluid is held under pressure by an external source.
		In contrast to compressed gas and spring accumulators, this type delivers a nearly constant pressure, regardless of the volume of fluid in the cylinder, until it is empty.
		According to Hooke's law the magnitude of the force exerted by a spring is linearly proportional to its extension.
	en.wikipedia.org /wiki/Hydraulic_accumulator (730 words)

	Accumulator - Wikipedia, the free encyclopedia
		Accumulator (computing), in a CPU, is a processor register in which intermediate results are stored.
		Accumulator (energy), an apparatus by means of which energy or power can be stored.
		Hydraulic accumulator, an energy storage device using a pressure storage reservoir in which a non-compressible hydraulic fluid is held under pressure by an external source.
	en.wikipedia.org /wiki/Accumulator (201 words)

	Hydraulic Accumulator,Hydraulic Accumulator Manufacturers,Hydraulic Accumulators,Manufacturer India
		A hydraulic accumulator is a pressure storage reservoir in which a non compressible hydraulic fluid is retained under pressure from an external source.
		As fluid is pumped to it, the pressure in the accumulator is determined by the compression rate of the spring.
		The hydraulic accumulators are applicable for hydraulic shock suppression are suitable for leakage compensation.
	www.hydraulic-equipment-manufacturers.com /hydraulic-accumulator.html (695 words)

	Hydrotrole - Hydraulic Accumulators and Hydropneumatic Accumulators
		The pressure generated by a spring-loaded accumulator depends on the initial loading and spring rate of the spring, and thus is not constant throughout the stroke of the piston.
		Accumulators of this type are compact and light, but best suited to systems where demand is intermittent and the fluid volumes required from the accumulator flow are not very large, as this type of accumulator is not normally made in large sizes.
		An accumulator is a convenient source of pressure to operate a holding device at constant pressure, regardless of demand from other sections of the system, or for maintaining a high working pressure on a workpiece during a long stand-by period.
	www.accumulators-hyd.com /accumulators/Accumulators.htm (8194 words)

	hydraulic accumulator charging valves
		Accumulator charging valves must be designed so that they can switch within milliseconds.
		The switching hysteresis of 5, 10, 15 or 20% is at accumulator charging valves a fixed ratio obtained from the piston area.
		The accumulator charging valve principle is also used for multiple pressure setting using the same differential area switching valves it is possible to save more energy.
	www.hl-hydraulic.com /english/techinfo/spe_ladu/spei_lad.htm (470 words)

	Hydraulic Accumulator Sizing Calculations - Engineers Edge (Site not responding. Last check: 2007-10-20)
		In general, hydraulic accumulators are pre-charged one half of the maximum operating fluid pressure., this is adequate for most applications.
		Accumulators are typically rated by their manufacturer at gas volume when all fluid has been expelled.
		Accumulators are selected based on the fluid pressure and volume requirements of the system which they are to be installed into.
	www.engineersedge.com /hydraulic/accumulator_equations.htm (259 words)

	(WO/1999/034062) ELECTROHYDRAULIC BARRIER OPERATING DEVICE (Site not responding. Last check: 2007-10-20)
		In order that the energy stored in the hydraulic accumulator can be utilised in case of current failure, an electromagnetic valve that opens in case of current failure is to be inserted in the tube connecting the hydraulic accumulator with the hydraulic appliance operating the railing bar.
		The device comprises a hydraulic accumulator that is connected directly or indirectly to the feed pump of the hydraulic power package through a baroswitch and also connected directly or indirectly to the third operating input of the hydraulic transmission unit through a router valve operated by an electromagnet opening in case of current failure.
		In case if the pressure of the nitrogen in part 6.2 of the hydraulic accumulator 6 is at the lower limiting value, the electric motor 4.3 switched on and the feed pump 4.2 works directly to the second router valve 5.2, charging partly the hydraulic accumulator 6 at the same time.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/34062.990708&ELEMENT_SET=DECL (2782 words)

	(WO/1999/034119) HYDRAULIC UNIT (Site not responding. Last check: 2007-10-20)
		The hydraulic unit according to the invention is characterized in that one of the structural elements is a distributing element with fluid communication ducts for flow of hydraulic fluid between the hydraulic pump, the hydraulic accumulator and the hydraulic cylinder and having respective side faces to which the pump, the accumulator and the
		Thereby the piston is displaced upwardly and presses hydraulic fluid from the second cylinder chamber 11 to the accumulator 07 via the annular channel 14 around the cylinder wall 13 and channels in the distributing element 04.
		By the opposite rotational direction of the pump 15 hydraulic fluid is conducted from the accumulator 07 to the second cylinder chamber 11 under pressure through channels in the distributing element 04 and the annular channel 14 around the cylinder wall 13.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/34119.990708&ELEMENT_SET=DECL (899 words)

	Submarine Hydraulic Systems - Chapter 3 (Site not responding. Last check: 2007-10-20)
		The accumulator air flask (9) serves as a volume tank for the accumulator, allowing the air to pass to and from it when the accumulator is loading or unloading.
		Hydraulic fluid discharged by the accumulator is conveyed to the main supply manifold (see Figure 3-11) where its flow is distributed to the supply lines and also to the control valve manifolds.
		Hydraulic oil which enters the automatic bypass and nonreturn valve from the pump pressure line (8) is bypassed to the suction side of the pump through the port (9).
	www.maritime.org /fleetsub/hydr/chap3.htm (12972 words)

	Hydraulic Accumulator (Site not responding. Last check: 2007-10-20)
		To depressurize the system, turn the ignition OFF and pump the brake pedal at least 20 times, until an obvious increase in pedal pressure is felt.
		Using an 8mm hex wrench, loosen and unscrew the accumulator.
		Tighten the accumulator assembly to 30–34 ft. lbs.
	aarc.epnet.com /application/9133/9133CH09_Hydraulic_Accumulator_.htm (137 words)

	WHAT'S AN ACCUMULATOR? - Tobul Accumulator,Inc. Bamberg, South Carolina
		A hydraulic accumulator is a device in which potential energy is held under pressure in the form of a compressed gas or spring or by a raised weight to be used to exert a force against a relatively incompressible fluid.
		Accumulators can be used to stabilize pressure changes in hydraulic systems when liquid is subjected to rising or falling temperatures.
		They use a gas as a spring cushion in conjunction with a hydraulic fluid, the gas being separated by a piston or a thin diaphragm or bladder.
	www.tobul.com /bkgd/whats.html (194 words)

	Integral hydraulic tilt-cab suspension and tilting apparatus - Patent 4483409
		Although not illustrated, actuation of the hydraulic cylinder 20 is controlled from a station, typically mounted on the chassis, which is remote from the cab 14 and the hydraulic cylinder 20.
		In this connection, the forward left portion of the cab is shown to be suspended with respect to the chassis by a suspension assembly 22 of a type known in the art and is operative to cushion the cab with respect to the chassis during normal operation.
		The forward left and right accumulators 22 and 26 are formed with double acting cylinders and the push and pull hydraulic chambers are fluidically cross-connected and the ratio of the rod diameter and tube diameter of the cylinders is preferably selected to provide a high roll stiffness for the cab suspension.
	www.freepatentsonline.com /4483409.html (3297 words)

	Hydraulic Hose Fittings Products
		Hydraulic hose has three layers: the tube which is exposed to the system fluid, a steel-wire reinforced braiding for strength, and an outer rubber cover to protect the wire braiding from chafing.
		Reusable hydraulic hose fittings are designed to enable repair and replacement in the field.
		Most hydraulic hose manufacturers clearly mark their hose with the specification to which it was designed.
	www.sspfittings.com /products/brand_home.asp?brand=31 (358 words)

	Hydraulic Accumulator Tower at Limehouse Basin (Site not responding. Last check: 2007-10-20)
		The building housed a hydraulic accumulator, which stored the power generated by a steam engine by raising a large gravel-filled weightcase within the building.
		The accumulator maintained a constant pressure on the hydraulic mains used to operate lock gates and cranes around the dock.
		The chimney was reinstated to its former height, using evidence from old photographs, and a second stair was installed inside it, leading to a viewing platform on the roof.
	dspace.dial.pipex.com /town/walk/kce12/projects/pages/hyd.html (144 words)

	The Fleet Type Submarine - Chapter 12
		The hydraulic fluid used in submarine hydraulic systems is a light, fast-flowing lubricating oil, which does not freeze or lose its fluidity to any marked degree even at low temperatures, and which possesses the additional advantage of lubricating the internal moving parts of the hydraulic units through which it circulates.
		The accumulator, located in the pump room, which accumulates the oil from the pump and creates pressure oil which is maintained at a static head for instant use anywhere in the system.
		The accumulator air flask, located in the pump room, which serves as a volume tank for the accumulator, allowing the air to pass to and from it when the accumulator is loading or unloading.
	www.hnsa.org /doc/fleetsub/chap12.htm (4583 words)

	Excavators (Site not responding. Last check: 2007-10-20)
		A hydraulic accumulator is a device in which potential energy is held under pressure in the form of a compressed gas or spring or by a raised weight to be used to exert a force against a relatively......
		Hydraulic accumulator A hydraulic accumulator is an energy storage device.
		The two newest exhibits are a Galloways hydraulic pumping engine and a towering 30-tonne hydraulic accumulator, which will form the core of a new display about hydraulic power.
	www.excavatorsclub.com /hydraulicaccumulator (1319 words)

	Clean Automotive Technology - OTAQ - EPA
		The primary hydraulic components are two hydraulic accumulator vessels (a high-pressure accumulator capable of storing hydraulic fluid compressing inert nitrogen gas and a low-pressure accumulator) and one or more hydraulic pump/motor units.
		Hydraulic drivetrains are particularly attractive for vehicle applications that entail a significant amount of stop-and-go driving, such as urban delivery trucks or school buses.
		A major benefit of a hydraulic hybrid vehicle is the ability to capture and use a large percentage of the energy normally lost in vehicle braking.
	www.epa.gov /otaq/technology (2191 words)

	[No title]
		Since the accumulator is apart of this system, it is imperative that its fluid level is readily known.
		Accumulator Function A hydraulic accumulator accomplishes many tasks in order to maintain proper operating conditions in a pressurized system.
		The gas side of the accumulator, where the system pressure is absorbed and stored, is pre-charged with.5354 +/-.0065 cubic feet of nitrogen, per specification 3.1.2.4 of the document in Appendix 2.
	www.stevens-tech.edu /engineering/me/Undergraduate/senior_design/1999/1999-4/FinalReport.doc (5417 words)

	Transmission, Driveline, Hybrid Drive engineering - hydraulic gas accumulator (Site not responding. Last check: 2007-10-20)
		Yet on current CVTs, even if there is no shifting (no displacement), the hydraulic actuator and pump still uses up a lot of energy to supply the "clamping force", which is the force the pulley halves must exert on the belt at all times in order to create the necessary friction drive force.
		When activation is requied this pressure will provide the force to move the actuator and at the same time a pressure switch on the accumulator would engage the hyraulic pump to recharge the accumulator.
		Accumulators are routinely used with "Offloading valves" specifically for this purpose.
	www.eng-tips.com /viewthread.cfm?qid=120233&page=1 (1651 words)

	Green Car Congress: EPA, Eaton and Partners Developing Full Diesel-Hydraulic Series Hybrid for UPS
		A hybrid hydraulic system uses an accumulator (which stores energy as highly compressed nitrogen gas) and one or more hydraulic pump/motors rather than the battery pack, electric generator/motor and power electronics used in electric hybrids.
		With HLA, a reversible hydraulic pump/motor and accumulators are added to optimize fuel economy, while keeping the vehicle’s conventional engine and transmission.
		I attended the October HTUF meeting and drove both the EPA’s hydraulic hybrid and a FMTV with Eaton’s series hydraulic hybrid.
	www.greencarcongress.com /2005/02/epa_eaton_and_p.html (1369 words)

	Brake & Hydraulic Problems
		The hydraulic pressure accumulator holds pressure in the system for emergency assist if the hydraulic pump fails or the engine quits altogether.
		Disconnect hose from hydraulic reservoir at the top of the "bomb" (hose clamp), remove hose by rotating (twisting by hand) and quickly insert into recovery reservoir.
		Loosen the 17mm banjo bolt from high pressure hose (from hydraulic pump) and remove by hand retrieving two copper or rubber washers (both need to be replaced) located above and under the hose connection.
	www.20v.org /brakprob.htm (2777 words)

	Hydraulic Accumulator (Site not responding. Last check: 2007-10-20)
		Accumulators are used in a hydraulic system to store energy, absorb shock and smooth pulsations.
		Hydraulic Accumulator Division supplies piston and bladder style accumulators, and more recently a popular line of diaphragm accumulators.
		OilAir Hydraulics, Inc. is the first name in advanced hydraulic accumulators.
	www.hydraulicaccumulator.info (401 words)

	Piping & fluid mechanics engineering - Hydraulic Accumulator Sizing (Site not responding. Last check: 2007-10-20)
		The net effect of an accumulator can be at times equated to that of a spring, compresses (or stretches) then returns that same energy into the system.
		We were able one time to use an accumulator to fix a problem, but the only way it worked was to add a check valve with a hole drilled into the check valve.
		The result is free flow into the accumulator and controlled (adjustable) reverse flow out to control the discharge rate.
	www.eng-tips.com /viewthread.cfm?qid=77341 (853 words)

	LayItLow.com Forums -> hydraulic accumulator
		no, an accumulator in an air system is just a chamber to expand the air.
		You use an accumulator on hydraulics because oil does not compress.
		which is why what people are calling an air accumulator is actually just a chamber.............
	www.layitlow.com /forums/index.php?showtopic=158972 (262 words)

	Ford Thunderbird - ABS system
		The pump running will pressurize the hydraulic accumulator to around 2650 PSI at which point the pressure switch contacts will open, the Hydraulic Pump Motor Relay will drop out and the pump will stop as well as the red and amber lights will extinguish.
		The failure of the Hydraulic Pump Motor Relay is a common occurrence.
		The normal failure modes are the contacts welded themselves shut causing the Hydraulic Pump Motor to run continuous or the relay failing to close which prevents normal pump motor operation.
	www.albeedigital.com /supercoupe/articles/abs-system.html (5096 words)

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