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Topic: Bypass duct

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	U.S. Patent: 5680754 - Compressor splitter for use with a forward variable area bypass injector - October 28, 1997
		In the single bypass operating mode, the first bypass duct inlet 62 is pressurized to a level above that in the space 44, thereby requiring closure of the selector valve 78 to prevent recirculation of air and stalling of the first fan section 40.
		The combined flow through common bypass duct 74 is further mixed with the core engine combustion gases exiting the low pressure turbine 30, by a suitable mixer, such as a rear VABI (not shown), at the downstream end of the inner casing 68.
		Additionally, the second bypass duct inlet 66 may be modified to choke the airflow in order to prevent the operating line of the second fan section 42 from dropping more than a predetermined amount as the pressure in the first bypass duct inlet 62 drops.
	www.everypatent.com /comp/pat5680754.html (4234 words)

	Automotive air conditioner having condenser and evaporator provided within air duct - Patent 5983652
		The evaporator and the condenser are disposed in a duct.
		An evaporator 207 of a refrigerating cycle is disposed in the duct 100, and a condenser 203 of the refrigerating cycle is disposed on the downstream side of the evaporator 207 similarly in the duct 100.
		A pair of auxiliary heaters 700 and 701 are disposed on the downstream of the condenser 203 in the duct 100.
	www.freepatentsonline.com /5983652.html (17943 words)

	Honeywell HE225B Bypass Humidifier - Buy Online
		Humidifiers > Bypass and Power-Fan Humidifiers > Honeywell HE225B Bypass Humidifier
		Bypass humidifiers do not have a fan, but instead require a 6â duct to be connected to the side and then to the opposite air duct system from the humidifier.
		That means for bypass models that if the humidifier is installed on the supply plenum, the 6â duct will connect to the humidifier and the return plenum, and if the humidifier is installed on the return plenum, the 6â duct will attach to humidifier and the supply plenum.
	www.alpinehomeair.com /viewproduct.cfm/productID/210/p/Honeywell_HE225B_Bypass_Humidifier (602 words)

	DUCT SIZING With ULTRA-ZONE (Site not responding. Last check: 2007-10-27)
		The bypass duct would be sized to handle the 1400 CFM which would be the excess pressure when only that one zone calls.
		The bypass method must be used on zoning systems that will have unequal size zones, applications of 4 zones or more and might be needed on some jobs that will have a smaller number of zones.
		Duct design will be uniquely different from one zoning job to another and because of that, unfortunately there is no single way of laying out a zoning system.
	www.ewccontrols.com /ultrazone/duct_sizing.htm (1150 words)

	Bypass duct fan noise reduction assembly - US Patent 6439840 (Site not responding. Last check: 2007-10-27)
		Nevertheless, in addition to the conventional bypass duct acoustic liner, few attempts have been made to reduce the rearward propagation of a fan BPF tone and its harmonics which increase a total noise level emitted from the rear of an engine, thereby more severely affecting the environment especially in a take-off condition.
		The principle of the present invention is that reduction of rearward noise propagation in the bypass duct is conducted through direct attenuation or flow modulation to disrupt continuity, destroy the symmetrical pattern and absorb the sound energy of the spinning mode of the sound pressures.
		According to one embodiment of the present invention a plurality of perforated baffle plates 74 are provided in the annular bypass duct 68 to divide a major section of the annular bypass duct 68 between the stator vanes 69 and the mixer device 70, into a plurality of axial flow-path segments in an asymmetrical pattern.
	www.patentstorm.us /patents/6439840.html (3861 words)

	Tips - Finishing the Bypass Tube (Site not responding. Last check: 2007-10-27)
		Prior to finishing the Carbon Fiber Bypass system, it should be mounted in the model, engine installed, cutouts made in the cover, tailpipe mounted and the Heat Shield applied per plans.
		Some installations require a F/G extention to be glued to the front of the bypass duct.
		Velcro straps are held to bypass duct with (2 each) small button head screws.
	www.bvmjets.com /tips/bypass_finish.htm (202 words)

	The IEQ Review: Mold Control By HVAC Design
		The bypass duct is sized to have the same pressure drop as the cooling coil so that a constant air quantity can be maintained at all times during system operation.
		Bypass control maintains the dry bulb temperature in the space by modulating the amount of air flowing through the cooling coil, thus varying the supply air temperature to the space.
		Bypassing return air only and dehumidifying all the outside air can result in space relative humidity control that approaches what can be obtained with reheat control.
	www.imakenews.com /pureaircontrols/e_article000110752.cfm (993 words)

	Turbofan engine having central bypass duct and peripheral core engine - US Patent 6532731 (Site not responding. Last check: 2007-10-27)
		A turbofan engine has a fan bypass duct which is at the center of the engine surrounding the fan and compressor drive shafts and an annular drive engine which is located at the outer periphery of the engine surrounding the bypass duct.
		Because the bypass duct is located at the center of the engine, the fan and compressor drive shafts are not heated by the core engine and remain at approximately ambient temperature.
		The bypass fan acts as a precompressor for the air that enters the core drive engine inlet 22 and pressurizes a large volume of air which is exhausted from the outlet 36 of the bypass air duct to provide additional thrust.
	www.patentstorm.us /patents/6532731.html (2441 words)

	Device for controlling the throat areas between the diffusor guide vanes of a centrifugal compressor of a gas turbine ...
		This device provides the diffusor guide vanes with bypass ducts which establish communication between the pressure and suction sides, which can be sealed by means of shut-off elements, which take the form of bimetal components or at least are connected to such a component, and which are deformed flap-fashion as a function of temperature.
		In this previously disclosed case the bypass ducts are controlled, or opened and closed, by means of gates traveling within the guide vanes to reach various extreme positions under combined lift/thrust motions.
		When the bypass ducts 8 are opened, the respective diffusor throat area 7 accordingly is widened and the throughput is augmented.
	www.freepatentsonline.com /4740138.html (2246 words)

	Turbocharger R&R
		Loosen the clamp on the bypass hose where it attaches to the metal intake pipe, then loosen the bypass hose and remove it from the pipe.
		Once disconnected, the entire intake duct, bypass valve and hose, and vent hose assembly can be rotated upward and to the side to get it out of the way.
		Reconnect the bypass hose to the metal intake pipe and tighten the clamp.
	www.quasimotors.com /turbo_r&R.htm (1673 words)

	Rolls-Royce: Education (Site not responding. Last check: 2007-10-27)
		In the turbofan or ‘bypass’ engine the partly compressed airflow is divided, some into a central part - the gas generator or core - and some into a surrounding casing - the bypass duct.
		In the high bypass ratio turbofan, as much as seven or eight times as much air bypasses the core as passes through it.
		A low bypass ratio turbofan, where the air is divided approximately equally between the gas generator and the bypass duct, is well suited to high-speed military usage.
	www.rolls-royce.com /education/schools/gasturbine/types.jsp (418 words)

	Variable flap for a variable pitch ducted fan propulsor - United States Patent 3,931,708
		For a variable pitch ducted fan as claimed in claim 2 wherein said variable flap is pivoted to said duct at a point where the flap flares into the arc of the convex section.
		I have found that I can improve the effectivenss of the duct for both the cruise and reverse mode performances by designing the flap to provide a convergent-divergent nozzle when the flaps are in their closed position for cruise operation and when in the open position form a desirable inlet for the reverse pitch operation.
		The fan is surrounded by a suitable bypass duct 18 so that air during cruise and takeoff flight regimes flows into the duct, through the fan blades and a portion is ingested into the engine through inlet 20 while the remaining portion is discharged through the exit 22 of duct 18 via anti-swirl vanes 24.
	xrint.com /patents/us/3931708 (855 words)

	Lacrimal Duct Obstruction Information on Healthline
		A lacrimal duct obstruction is blockage of the tear duct, the thin channel that normally drains tears from the surface of the eye.
		In adults, a common cause of lacrimal duct obstruction is involution, which is progressive degeneration occurring naturally with advancing age, resulting in shrivelling of organs or tissues.
		Surgical probing to open up the duct under general anesthesia is a last resort, after a year or so of less invasive treatments.
	www.healthline.com /galecontent/lacrimal-duct-obstruction (766 words)

	2004_February_cc (Site not responding. Last check: 2007-10-27)
		For the case with flow bypass, duct dimensions 70 mm wide and 32 mm high were assumed, resulting in 10 mm clearance on either side of the heat sink.
		The pressure drops across the heat sink at each of the assumed air velocities through the fins was plotted versus the corresponding total duct flow rate with bypass to obtain the pressure drop curves with flow bypass.
		As shown in Figure 2, the pressure drop across the heat sink and the duct at positions corresponding to the inlet and outlet of the heat sink is also determined by the intersection of the fan curve and the pressure drop curves with bypass.
	www.electronics-cooling.com /html/2004_february_cc.html (851 words)

	Mercedes 190E 2.3-16 Kompressor Project
		The right output duct will need to be cut so that the duct does not extend past the pulley.
		Note the welds where the output duct was shortened and the resonator tube on the input duct was removed.
		The duct to the throttle body has an extra bend because the temperature sensor interfered with a bar on top of the throttle body.
	members.cox.net /bettyv/16v/jim_16v.htm (820 words)

	All Pancreatic Duct Bypass messages (Site not responding. Last check: 2007-10-27)
		My husband was told he was a good candidate for a "pancreatic duct bypass" and I can't find anything on the internet about this so-called procedure.
		The purpose of this operation is to reroute the bile flow from the liver to the intestine around the obstructing area.
		If it appears that the tumor may also be blocking the first part of the small intestine, a gastric bypass procedure may be performed where the stomach is sewn directly to the small intestine around the obstructive tumor so the patient can continue to eat normally.
	www.cancercompass.com /message-board/message/all,10924,0.htm (651 words)

	LAPAROSCOPIC SURGERY OF THE BILE DUCT
		Since the bile duct is located deep in the abdomen the incisions for open bile duct surgery are long and large incisions.
		Laparoscopic bile duct bypass: In patients who have strictures (narrowing) of the bile duct, the drainage of bile into the intestine is blocked and the bile accumulates in the blood causing jaundice.
		Benign bile duct strictures are usually from injury to the bile duct during a previous laparoscopic gall bladder removal procedure.
	128.125.97.89 /divisions/tumor/pancreasdiseases/web%20pages/BILIARY%20SYSTEM/lap%20surg-bile%20duct.html (830 words)

	Internal combustion engine comprising an engine braking arrangement patent invention
		For example, if a bypass pipe is not closed in a gastight manner in the combustion mode, exhaust gas energy is lost, since this energy is no longer available to the power turbine driven by exhaust gas via the opened exhaust pipe.
		The duct permits the exhaust pipe and the bypass pipe to be placed into communication with the exhaust pipe.
		Throttling of the bypass pipe causes the exhaust gas back pressure to increase downstream of the exhaust gas turbine, which leads to a reduction in the difference in pressure at the exhaust gas turbine and causes a reduction in the rotational speed of the exhaust gas turbocharger.
	www.freshpatents.com /Internal-combustion-engine-comprising-an-engine-braking-arrangement-dt20060810ptan20060174620.php (2120 words)

	JET NOISE REDUCTION (Site not responding. Last check: 2007-10-27)
		The fundamental principle is reduction of the convective Mach number of turbulent eddies that cause intense noise.
		In general, the vanes can be installed inside or outside the bypass duct.
		The downward tilt of the bypass stream results in a thick layer of low-speed flow under the end of the primary potential core (end of dark brown region).
	supersonic.eng.uci.edu /jnr.htm (256 words)

	Engine placement in the bypass : RC Universe! The Ultimate RC forum (Site not responding. Last check: 2007-10-27)
		It depends to some extent on the design of the bypass, the diameter of the inner and outer exhaust ducts, the space between them, and especially the size of the bellmouth/splay at the front of the inner exhaust duct.
		Needed: diameter inner and outer ducts, size of bellmouth (normally 1/4" x 45 degrees), relative location front of outer and inner ducts at front, relative position outer and inner ducts at rear of model - and also distance that outer duct is inside the rear of fuselage.
		The bypass is designed to move the airflow around the engine and "hug" the exhaust nozzle at the back of the engine creating a cooling effect.
	utopia.rcuniverse.com /rcarchive/26/2002/10/4/74615 (1431 words)

	Dual mode turbo engine patent invention
		A common exhaust duct downstream of the inner and outer gas generators is in fluid flow communication with the flowpaths.
		The air accelerated by the fan is called bypass air because it bypasses core engine or gas generator containing a combustor for burning or combusting fuel with compressed air, air compressed by the fan and compressor.
		Low bypass turbofans of fixed geometry are in current production--and even more operative flexibility has been obtained with variable cycle engines in which the amount of air that is bypassed is changed to efficiently match power requirements based on aircraft speed.
	www.freshpatents.com /Dual-mode-turbo-engine-dt20060907ptan20060196164.php (2037 words)

	SSAT - 1997 Abstract: 58 Intrahepatic biliary-enteric bypass for malignant hilar obstruction. (Site not responding. Last check: 2007-10-27)
		Obstructive jaundice is a major source of morbidity in patients with cancers of the hepatic duct confluence.
		This study was undertaken to evaluate the effectiveness of intrahepatic biliary-enteric bypass to either the Segment III duct or the Right sectoral hepatic ducts in patients with unresectable hilar malignancies.
		In patients with cholangiocarcinoma, the one-year bypass patency was 80% in Group 1 (Segment III bypass) and 60% in Group 2 (Right sectoral hepatic duct bypass).
	www.ssat.com /cgi-bin/abstracts/97ddw/ddw58.cgi?printme=1&affiliation=1 (510 words)

	[No title] (Site not responding. Last check: 2007-10-27)
		An outside air duct was connected to the furnace return to provide outdoor air to the house.
		A 100-mm (4") diameter uninsulated duct is connected from the supply air duct to the outdoors.
		During a heating cycle, the heated bypass air causes the bimetal operator to open the damper blade so a larger volume of make-up air is then drawn into the furnace.
	www.cmhc-schl.gc.ca /publications/en/rh-pr/tech/00-144-case3-e.htm (303 words)

	HEPA and UV Central Air Purifiers for HVAC
		In the partial bypass configuration, a portion of the air in the HVAC return is pulled into the unit and purified on each pass through the system.
		The bypass connections are made by cutting a 10-inch diameter hole into the return duct, and connecting the inlet of the CAP600 model to the return duct with 10-inch rigid or flexible ducting.
		Bypass connections are made by cutting a 10-inch diameter hole into the return duct, and by connecting the inlet of the CAP unit to the duct with 10-inch rigid or flexible ducting.
	www.peakpureair.net /atcap600.htm (1364 words)

	Glossary
		When used with a bypass humidifier, a damper that closes off the bypass duct in the summer to stop air from being "blown" into the return.
		A type of humidifier that uses the pressure difference between the supply duct and the return duct of the HVAC equipment to move air over the evaporative pad.
		Duct that carries air from the HVAC equipment to the home.
	www.aprilaire.com /index.php?znfAction=Glossary (1644 words)

	HVAC Duct/Humidifier Placement & HVAC Insulation - Heating and Air - BBS - BobVila.com
		I have at least 8 flexible ducts to attach to the supply plenum (two 4"; five 6" and one 12" which will supply the basement ducts) and at least 2 large ducts to attach to the return plenum (one 12"; one 10 " which runs to the basement).
		Obviously, the 6" bypass duct will install on the opposite plenum, but I'd also like to know if there's an ideal installation location for it as well (again, considering the relative position of the return ducts).
		To compare flex ducts to plastic grocery bags indicates a special kind of bullish attitude that is worth ignoring.
	www.bobvila.com /BBS/HVAC_DuctHumidifier_Placement_and_HVAC_Insulation-Heating_and_Air-1-F6155.html (1469 words)

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