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1. 发明专利

JP2000073952A DOOR OPENING DEVICE FOR PACKAGE TYPE FLUID MACHINE 失效
公开(公告)号：JP2000073952A
公开(公告)日：2000-03-07
申请号：JP24856898
申请日：1998-09-02
申请人： ANEST IWATA CORP
发明人： TAKADA SHIGEO , INOUE HIROSHI
IPC分类号： F04B39/12 , F04B41/00
摘要： PROBLEM TO BE SOLVED: To provide a door opening device for a package type fluid machine in which an opening door is opened to such a degree that a finger can be inserted when a fixing metal of the opening door is released for facilitating opening/closing it. SOLUTION: When an opening door is closed by a fixing metal, at least either of the opening door and a member on the side facing the opening door to be closed generates elastic deformation by a protruded part 8. When the fixing metal is released, the opening door is opened to such a degree that a finger can be inserted by utilizing returning force of elastic deformation.

2. 发明专利

JPH09287570A CONNECTING ROD SMALL END PART OF OILFREE TWO-STAGE RECIPROCATING COMPRESSOR 失效
公开(公告)号：JPH09287570A
公开(公告)日：1997-11-04
申请号：JP12246196
申请日：1996-04-19
申请人： ANEST IWATA CORP
发明人： SATO SHIGEMI , TAKADA SHIGEO
IPC分类号： F04B39/00 , F04B25/04 , F04B39/02 , F16C19/46
摘要： PROBLEM TO BE SOLVED: To prolong the life of connecting rod small end part bearings by respectively providing a needle bearing with a grease sealed type retainer on a low pressure side piston, and a grease sealed full type roller needle bearing on a high pressure side piston. SOLUTION: In a low pressure side cylinder, force is applied to the upper part of a small end part 4 at upward stroke of the piston 1. Force is applied to the lower part of the small end part 4 at downward stroke of the piston. At the dead point changing the direction of the alternate load, a piston pin 2 and a needle bearing 5 with a grease sealed type retainer are rotated in either direction. By repeating this action, the load receiving position is changed inch by inch, and lubricating grease is also averagely used on the full circumference. A grease sealed full type roller needle bearing 15 fitted to the piston 11 of a high pressure side cylinder is provided with the more number of needle rollers 15a so as to bear the higher load, and the needle rollers 15a are mutually contacted, rotated, and moved while pushing lubricating grease. Consequently, durability can be maintained.

3. 发明专利

JP2000081090A AXLE CONSTITUTION FOR PORTABLE FLUID MACHINE 失效
公开(公告)号：JP2000081090A
公开(公告)日：2000-03-21
申请号：JP24856798
申请日：1998-09-02
申请人： ANEST IWATA CORP
发明人： TAKADA SHIGEO , INOUE HIROSHI
IPC分类号： B60B35/02 , F16F15/08
摘要： PROBLEM TO BE SOLVED: To easily replace an axle when the axle is bent in transporting by penetrating the axle in an insertion/extraction member inserting/extracting the axle attached to a base or a tank and attaching wheels to a wheel attachment parts projected from the insertion/extraction member. SOLUTION: This portable fluid machine has a fluid machine composed of a reciprocating, rotation, or scroll compressor, a vacuum pump including a scroll type, and a motor or an engine as its drive source mounted on a base 1 or a tank. An insertion/extraction member 2 is directly or indirectly attached to the base 1 or the tank by welding. The insertion/extraction member 2 uses a structural material having a bore larger than the outer diameter of the axle 3, for example a pipe material, is pierced by the axle 3 therein, and has wheels 4 attached to projecting wheel attachment parts. In transportation, even if the fluid machine falls and the axle 3 is bent so as to be unusable, the axle 3 can be easily replaced by being extracted from the insertion/extraction member 2.

4. 发明专利

JPH09280175A CYLINDER HEAT INSULATING STRUCTURE FOR OIL FREE RECIPROCATING COMPRESSOR 失效
公开(公告)号：JPH09280175A
公开(公告)日：1997-10-28
申请号：JP11408796
申请日：1996-04-10
申请人： ANEST IWATA CORP
发明人： TAKADA SHIGEO
IPC分类号： F04B39/00 , F04B39/06 , F04B53/08 , F04B53/16
摘要： PROBLEM TO BE SOLVED: To improve the durability of a piston ring by providing a heat insulating gasket having heat insulation and heat resistance to be partially held in the periphery of a fastening bolt so as to form a gap between a cylinder and a valve spacer. SOLUTION: A valve spacer 2 is provided to be held by a cylinder cover 3 on a cylinder 1 and fastened by four bolts 4. A ring-like heat insulating gasket 5 is provided to be held in the periphery of the fastening bolts 4 between the cylinder 1 and the valve spacer 2, and a gap is formed between the cylinder 1 and the valve spacer 2. The heat temperature of the cylinder head part of the cylinder cover 3 and the valve spacer 2 is insulated for the cylinder part by the ring-like heat insulating gasket 5 and the gap formed by the heat insulating gasket 5, and the increase of the cylinder temperature is suppressed. Thus, the life of the piston ring of the oil free compressor is extended.

5. 发明专利

JPH09303263A PISTON FOR OIL-FREE RECIPROCATING COMPRESSOR 失效
公开(公告)号：JPH09303263A
公开(公告)日：1997-11-25
申请号：JP14104596
申请日：1996-05-10
申请人： ANEST IWATA CORP
发明人： TAKADA SHIGEO
IPC分类号： F04B39/00
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of a whistling sound due to a blowby gas flow by forming a circumferential groove at a position immediately below the lowermost groove of a plurality of piston ring groves formed on the external surface of a piston, and then discharging blowby gases collected into the circumferential groove via one or more vertical grooves. SOLUTION: A top ring groove 2 and the second ring groove 2 are respectively engraved on the upper part of the piston 1, and a top ring 6 and the second ring 7 are coupled to respective grooves 2 and 3. In this case, a circumferential groove 4 is engraved at a position immediately below the second ring groove 3. Also, a vertical groove 5 is engraved on a piston skirt 8, so as to be communicated to the circumferential groove 4, thereby forming a blowby gas discharge passage. Furthermore, a distance between the circumferential groove 4 and the second ring 3 is established so as not to generate a whistling sound. Also, the vertical groove 5 formed near the abutment 7a of the second ring 7 is sized so that the cross sectional area of a flow passage between the vertical groove 5 and a cylinder restrains blowby gas velocity resistance at a low value.

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