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Patent Searching and Data


Matches 1,201 - 1,250 out of 3,237

Document Document Title
JP2003172282A
To provide a multi-stage type vacuum pump capable of preventing a contact between a rotor and a housing caused by a difference of thermal expansion of the housing and a rotation shaft while inhibiting a reduction of volume efficiency of ...  
JP2003172249A
To improve the sealing effect of an eccentric bearing mechanism for a pump shaft 2 consisting of the pump shaft, an eccentric ring 4 connected to the pump shaft in such a way that it cannot rotate slackly and a needle roller bearing disp...  
JP2003172261A
To certainly prevent a lubricant in a gear box chamber from flowing out to an exhaust chamber with a simple structure without making a size of a volume type vacuum pump large.In the volume type vacuum pump, a driving part exists and a dr...  
JP2003161272A
To provide a scroll type pump capable of evenly applying back pressure to a movable scroll by a back pressure applying means through a sliding member.Spiral blade parts 20 are formed on a fixed scroll 1 and the movable scroll 2, respecti...  
JP2003161277A
To provide a multi-stage dry vacuum pump capable of surely reducing a fluid leakage effect.A projection 4A is provided at the top of the blade 3A of a rotor 2A, and the outer surface is formed into a circular shape having the same curvat...  
JP2003139075A
To enhance strength of both laps by securing large a fillet part arranged in a root part of a mating lap by securing large a recess part arranged in a tip part of the fixed side lap and the turning side lap.This scroll compressor mutuall...  
JP2003129980A
To provide a gas compressor having improved volume efficiency and other characteristics by suppressing the leakage of gas from a compression chamber.Sealing members 51 are provided between a cylinder 9 for the gas compressor and each of ...  
JP2003129970A
To provide a sealing structure of multistep compression type scroll fluid machinery capable of preventing a leakage of high pressure compressed fluid from a rear step compression part into a front step compression part.Spiral lap grooves...  
JP2003129979A
To improve the reliability of a shaft seal portion of a mechanical booster and simplify the construction thereof.The mechanical booster 1 comprises a motor 3 closely attached to a mechanical booster body 2 for rotating a shaft portion 4 ...  
JP2003120557A
To provide a gas compressor capable of improving the cooling performance by preventing the leak of refrigerant gas from high-pressure side to low-pressure side without being accompanied by a reduction in reliability of equipment or an in...  
JP2003120543A
To prevent the intrusion of oil to a pump chamber in the transfer of a vacuum pump from an operation state to an operation stop state.Annular shaft seal elements 49 and 50 are fitted and fixed to rotating shafts 19 and 20 in a rear housi...  
JP2003113787A
To eliminate an O ring for sealing a space on the rear end face side of a rotor shaft.A front side block 4 and a rear side block 5 are provided on both ends of a tubular cylinder 3, and a rotor rotatable by a rotor shaft 10 is arranged i...  
JP2003106269A
To provide a scroll fluid machinery provided with a discriminating means for discriminating each of a plurality of chip seals.In this scroll fluid machinery wherein a fixed scroll 2 and a revolving scroll 11 are provided with chip sealin...  
JP2003097459A
To provide a chip seal usable for a scroll compressor using carbon dioxide being a non-fleon refrigerant as a refrigerant, and superior in a dimensional tolerance.A spiral shape is used for the scroll compressor having a spiral lap erect...  
JP2003097202A
To prevent a vapor-phase working medium from leaking from an inlet port to an exhaust port via a clearance between a rotor chamber and a rotor in a rotary fluid machine.The rotary fluid machine comprises the rotor chamber 14 formed in a ...  
JP2003097461A
To prevent an overload without replacing a part even if a service condition changes in a scroll fluid machine.This scroll fluid machine is provided with a fixed scroll 1 for erecting a spiral fixed lap 6 on one side surface, and a turnin...  
JP2003097447A
To solve problems such as seal leakage and pipe damage at the connection part of a refrigerant circuit and a compressing mechanism part for a closed compressor contained in a hermetically sealed container via an elastic support so that t...  
JP3389866B2
To restrain the so-called oil rising phenomenon by preventing bearing- lubricating oil for being discharged into a lower area of a housing leaking through the clearance between the housing and a driving shaft by arranging a seal mechanis...  
JP3384858B2  
JP2003065264A
To improve sealing performance and durability of a seal member arranged between a fixed scroll and a slewing scroll.A seal attaching member 15 is arranged on an outer peripheral side of the slewing scroll 5, and the seal member 16 is arr...  
JP2003065263A
To improve duration of life of a bearing of a scroll fluid machine.A center boss positioned in a central potion of a scroll lap 21 of a fixed scroll 2 and protruding toward a panel board 22 of a slewing scroll 4 is arranged to be continu...  
JP2003065266A
To surely seal the top portion of a scroll lap in an oil free scroll fluid machine.In an oil free scroll fluid machine having a fixed scroll 2 fixed to a casing 5 and a swing scroll 4 having a scroll lap 23 engaged with the scroll lap 21...  
JP2003065262A
To prevent a compressing operation fluid in a scroll fluid machine from leaking to an outside thereby improving performance.This scroll fluid machine is provided with through holes 12, 41 arranged in central portions of scroll laps 21, 2...  
JP2003056476A
To provide a compressor reducible in the number of part items by simplifying seal constitution. A housing 11 is constituted by jointing a first housing constitutive body 21 and a second housing constitutive body 22, and a scroll type com...  
JP3377907B2  
JP2003042078A
To provide a scroll type compressor which reduces a friction coefficient on a sliding contact part with a tip seal to prevent the generation of frictional powder and further reduces the leakage of compressed gas, to thereby improve effic...  
JP2003042077A
To provide a scroll type fluid machine that increases the resistance against abrasion of a face seal and suppresses its contraction under high temperatures to enhance the durability and the service life of the face seal, and that can con...  
JP2003035285A
To provide a scroll type compressor capable of suppressing the reduction in compression ratio by a compressed gas leaked between adjacent compression chambers through a tip clearance. In this scroll type compressor, when the tip clearanc...  
JP2003028084A
To achieve miniaturization of a helical compressor and reduce sliding resistance caused by revolution of a revolving body.A disk shaped front side closing body 12 is joined to a front end surface of a cylinder 11, and a disk shaped rear ...  
JP3371603B2
A scroll compressor includes a stationary scroll and an orbiting scroll having respective wrap elements in engagement with each other. Each of the stationary and orbiting wrap elements has a tip seal groove defined therein and having opp...  
JP2003021088A
To improve an oil intrusion preventing operation by an oil intrusion preventing part used for preventing oil leakage to a pump chamber in a vacuum pump.A shaft sealing annular body 49 is engaged with and fixed to a rotating shaft 19 in a...  
JP3369786B2  
JP2003013876A
To enhance the oil intrusion preventive effect by an oil intrusion preventing member used to prevent the oil from leaking into the pump chamber of a vacuum pump.A shaft sealing ring 49 is fitted fast on a rotary shaft 19 in a fitting hol...  
JP2003013872A
To provide a scroll type compressor equipped with a motor as a driving source to drive a refrigerant compressing mechanism capable of effectively reducing the sliding resistance by regulating the force applied to a movable scroll to a pr...  
JP2003003978A
To provide a helical type fluid compressor holding sure seal performance with no special seal member required to make the atmosphere of low pressure on the inside of a case with high performance, high reliability, at a low cost.This flui...  
JP2002371982A
To prevent reduction in volumetric efficiency even in a rotary compressor using a carbon dioxide refrigerant. The rotary compressor 1 comprises a plurality of rotary compression elements 5 comprising cylinders 14 and 15 with both end ope...  
JP2002371979A
To provide an oil free type scroll fluid machine minimizing falling down or backlash of a rotary scroll, and having high efficiency and a long life. In this scroll fluid machine, a spiral shaped compressing chamber 46 gradually decreasin...  
JP2002371978A
To prevent leakage of compressed fluid from a tip seal portion fitted in a tip seal groove provided at a tip end of a fixed lap or a rotary lap, in a scroll fluid machine. Recessed portions 22, 23 are formed on a part of an inner surface...  
JP2002357190A
To provide an oil-cooled type screw compressor capable of preventing the leakage of oil to the outside of the compressor body, and suppressing losses of discharging air amount. An oil returning line 9 with an air-operated valve 91 interp...  
JP2002349462A
To provide an oil injection type screw compressor capable of preventing oil from leaking into a motor casing storing a motor for driving a male rotor via a rotor shaft. A first seal ring 11 having an oil seal 11a where a lip slides with ...  
JP2002339867A
To provide a sealing structure and a compressor provided with the sealing structure for a housing of an easily recycled and compactly composed compressor.In a joint of a cylinder block 1 and a front housing 2, an end face of the cylinder...  
JP3349867B2  
JP3349559B2  
JP2002332963A
To improve oil entering preventing action due to an oil entering preventing portion used for preventing the leakage of oil to a pump chamber in a vacuum pump.A ring-shaped shaft seal annular element 49 is fitted and fixed to a rotating s...  
JP2002332974A
To provide a scroll type machine having two scroll type compressors in a single exterior shell.The inside of the exterior shell 12 is divided into a sucking pressure chamber 90 and two discharging pressure chambers 80, and two scroll typ...  
JP3347209B2  
JP3344825B2  
JP3344843B2  
JP2002327848A
To improve an oil penetration preventing function by an oil penetration preventing part used for preventing an oil leakage to a pump chamber in a vacuum pump.A ring-shaped shaft seal annular member 49 is fitted and fixed to a rotation sh...  
JP2002322988A
To provide a sealing material and a chip seal which is superior in load resistance, in wear resistance and in not destructive property against a mating material as well as in moldability, and is capable of being used in a scroll type com...  

Matches 1,201 - 1,250 out of 3,237