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1. 发明专利

JPH08193664A WATERPROOF SEAL MECHANISM USING UNI-DIRECTIONAL DYNAMIC PRESSURE BARING 失效
公开(公告)号：JPH08193664A
公开(公告)日：1996-07-30
申请号：JP29727093
申请日：1993-11-02
申请人： SHICOH ENG CO LTD , SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO , MIYAO OSAMI , HORI MASAAKI
IPC分类号： F16C17/00 , A61M1/10 , F16J15/40
摘要： PURPOSE: To prevent the first fluid from entering a motor on the second fluid side by providing a uni-directional dynamic pressure bearing which has the non-return valve function to guide the second fluid only to the first fluid side and is provided with a dynamic pressure generating groove between the first fluid and the second fluid. CONSTITUTION: When a waterproof motor 5-1 for a pump is driven, a rotary cylindrical ceramics sliding member 92a having a dynamic pressure generating groove 99 is rotated, and the pumping function to pump the second fluid 94 in a fluid storage chamber 93 to the side of the pressurized fluid which is the first fluid, i.e., to the dynamic pressure side is generated by a uni-directional dynamic bearing 92. The fluid 94 in the fluid storage chamber 93 passes through the radial cap between a rotary dynamic bearing component 92a and a fixed cylindrical ceramics sliding member 92b through a communicating tube 95, and one-sidedly flows to the pressurized fluid side against the pressurized fluid. The uni-directional dynamic bearing 92 constitutes a means to pass the fluid 95 only in one direction, and a waterproof sealing mechanism having the perfect non-return valve function can be constituted.

2. 发明专利

JPH0610886A PRESSURE WATERPROOF SEAL MECHANISM 失效
公开(公告)号：JPH0610886A
公开(公告)日：1994-01-21
申请号：JP18881392
申请日：1992-06-23
申请人： SHICOH ENG CO LTD , SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , YAMAZAKI SHUNICHI , MORI TOSHIO , MIYAO OSAMI , HORI MASATETSU
IPC分类号： A61M1/12 , F04C2/16 , F04D29/02 , F04D29/04 , F04D29/046 , F16J15/48
摘要： PURPOSE:To extend a life even when a rotary shaft is rotated at a high speed and further to attain low noise vibration by operating a rotational side sliding member associated with a fixed side sliding member, of a ceramics sliding member of disk-shaped axial gap type. CONSTITUTION:By using a pressure waterproof seal mechanism 13, pressure fluid from a compression fluid side, for instance, blood can be prevented from flowing in a side of a waterproof motor 5-1, but by using an oil seal means 33 of further small load in the pressure fluid side of a ceramic dynamic pressure bearing 25 applied to a pump shaft 9, the pressure fluid is completely prevented from flowing into the side of the waterproof motor 5-1. By the pressureproof seal mechanism 13 constituted of the ceramic dynamic bearing 25 applied to the pump shaft 9 and a rotary shaft 14, the pressure fluid can be prevented from flowing into the side of the waterproof motor 5-1, but even when the oil seal means 33 is used, since a small load characteristic is only required, a large influence is prevented from being given to a motor characteristic, and with a small contact friction pressure between the oil seal 33 and the pump shaft 9, a respective life is improved.

3. 发明专利

JPH06346917A PRESSURE-PROOF WATER-PROOF SEALING SYSTEM USING UNIDIRECTIONAL DYNAMIC PRESSURE BEARING 失效
公开(公告)号：JPH06346917A
公开(公告)日：1994-12-20
申请号：JP15799393
申请日：1993-06-03
申请人： SHICOH ENG CO LTD , SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO , MIYAO OSAMI , HORI MASAAKI
IPC分类号： F16C17/10 , A61M1/10 , A61M1/12 , F16C33/74 , F16J15/453
摘要： PURPOSE:To lengthen a life span by forming a dynamic pressure generating groove to prevent inflow of a pressure fluid to the side of a dynamic pressure bearing between the dynamic pressure bearing and the pressure fluid, to blow a fluid between both of cylindrical sliding members on the rotary side and the fixed side and to flow the fluid to the side of the pressure fluid through an oil sealing means. CONSTITUTION:When a pump shaft 9 is rotated, as a rotary side cylindrical ceramic sliding member 92a is rotated, a function to pump a fluid 94 in a fluid reserve room 93 to the side of a pressure fluid is generated by a unidirectional dynamic pressure bearing 92. The fluid 94 in the fluid reserve room 93 passes a radial gap between the rotary side dynamic pressure bearing constitutional element 92a and a fixed side cylindrical ceramic sliding member 92b and is flowed unidirectionally to the side of the pressure fluid through an oil sealing means 33. Consequently, as the oil sealing means 33 and the unidirectional dynamic pressure bearing 92 constitute a means to pass the fluid 94 unidirectionally, it is possible to constitute a perfect pressure proofed and water proofed sealing system. Even in the case of high speed rotation, the rotation axis and the bearing make contact with each other in line, it is possible to lengthen a life span and to lower noise and oscillation.

4. 发明专利

JPH06335525A MOTOR PUMP SUITABLE FOR EMBEDMENT INTO BODY, SUCH AS AUXILIARY ARTIFICIAL HEART AND THE LIKE 失效
公开(公告)号：JPH06335525A
公开(公告)日：1994-12-06
申请号：JP15118493
申请日：1993-05-27
申请人： SHICOH ENG CO LTD , SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO , MIYAO OSAMI
IPC分类号： A61M1/10 , F04B19/12 , F04B53/08 , F04B21/00
摘要： PURPOSE:To provide the small-sized endoembedment type motor pump, such as auxiliary artificial heart, which is constituted to prevent heating of the endoembedment type motor pump and to prevent the deterioration in the characteristics thereof in spite of high-speed rotation of the pump, is safe to the human body and has a long life. CONSTITUTION:A motor 5-1 for pump driving of the motor pump 3-1 suitable for embedment into the body of the auxiliary artificial heart, etc., is formed of a material having a good thermal conductivity material and the part formed of the material having the good thermal conductivity is provided with an electron cooler 72. This electron cooler 72 is provided with a heat radiating means 74 for moving the warmed heat generated on the opposite surface of the electronic cooler 72 when the outside of the part formed of the material having the good thermal conductivity in contact therewith is cooled.

5. 发明专利

JP2000140125A FIXTURE 失效
公开(公告)号：JP2000140125A
公开(公告)日：2000-05-23
申请号：JP37820598
申请日：1998-12-21
申请人： SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO
IPC分类号： A61M25/02 , A61M1/00 , A61M1/10 , A61M1/14
摘要： PROBLEM TO BE SOLVED: To prevent the separation of a tube from the tissue by external force and simultaneously to prevent the infectious disease by the bacteria and the need for treatment a penetration part by substantially immobilizing the tube for connecting a medical implement penetrated through the skin of the body and embedded into the body and the medical implement outside the body. SOLUTION: The fixture is mounted at the epidermis of the skin penetration part of the body in the following state. The tube 1 emerging outside the body through the skin of the body passes the first hole 101 and second hole or notch 102 of a base part 4 and is held by a tube holding part 4a disposed in the second hole or the notch 102 and is adhered to the epidermis of the body by the adhesive coated surface of the base part 4. A drug 5 of a drug packed part 4b may be previously packed before mounting at the body and may be packed during or after the mounting.

6. 发明专利

JPH0819600A MECHANISM FOR ATTACHING ARTIFICIAL HEART 失效
公开(公告)号：JPH0819600A
公开(公告)日：1996-01-23
申请号：JP18871294
申请日：1994-07-07
申请人： SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO , IIYAMA HARUO
IPC分类号： A61M1/12 , A61M1/10
摘要： PURPOSE:To provide a highly efficient mechanism for attaching an artificial heart, which can eliminate the repetitions of incision and sewing of an apical part, which can easily and rapidly be attached with less hemorrhage, and which can be adapted to any heart configuration. CONSTITUTION:A mechanism for attaching an artificial heart is composed of an apical part ring 12 adapted to be sewn to a sewing cuff, the sewing cuff 11 sewn to an incised apical part C, a dilator 20 inserted into the apical part ring 12, bellows 20 for connecting the apical part C and the dilator 20, an artificial hear body 13 composed of a drive part 15 incorporating a pump part 14 and a locking part 17, and a doughnut-like balloon 16 adapted to be engaged with the pump pat 14. After disconnection of the dilator 20, the artificial heart body 13 locked in the bellows 10 is inserted in the apical part ring 12, and the external part of the inflated balloon 16 is fitted and held on the spherical part of the apical part ring 12.

7. 发明专利

JPH07275349A SEALING MECHANISM FOR ARTIFICIAL HEART 失效
公开(公告)号：JPH07275349A
公开(公告)日：1995-10-24
申请号：JP10736794
申请日：1994-04-11
申请人： SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO
IPC分类号： A61M1/12 , A61M1/10
摘要： PURPOSE:To provide a sealing mechanism for an artificial heart to maintain the shaft seal of a driving shaft to drive the axial flow pump to blood for a long period, by filling sealed liquid possible to suppress blood clotting and to be cleaned off in a sealed liquid bag communicating to the sealed liquid room of the artificial heart main body to comprise the artificial heart. CONSTITUTION:An artificial heart main body 3 to constitute a artificial heat used inserting into a cardiac chamber of a human body is provided with a cylindrical pump part 4, a driving part 5, connected to the base end part of the pump part, to drive an axial flow pump via a driving shaft, and a casing 9, a nozzle part 6 is formed on the tip, engaged to the periphery of the pump part. It has a dynamic pressure bearing 20 to support the base end of the driving shaft, a one directional dynamic pressure bearing 22 to support the tip end, and a sealed liquid room 21. The sealed liquid, to which protein decomposing enzyme secreted by heat resistant bacteria is mixed, to suppress blood clotting in the one directional dynamic pressure bearing is filled in a sealed liquid bag 12 communicating to the sealed liquid room.

8. 发明专利

JPH07178163A SEALING MECHANISM FOR ARTIFICIAL HEART 失效
公开(公告)号：JPH07178163A
公开(公告)日：1995-07-18
申请号：JP35474693
申请日：1993-12-21
申请人： SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO
IPC分类号： A61M1/12 , A61M1/10
摘要： PURPOSE:To provide a sealing mechanism for an artificial heart, which enables a pump for a main body of the artificial heart to accurately function without maintenance for a prolonged period of time and maintain complete shaft sealing. CONSTITUTION:A main body of an artificial heart comprises a pump 4 of a cylindrical shape and a driving part 5 installed at the base of the pump 4 and for driving the pump 4 through a driving shaft 10. The driving shaft 10 has a lower portion carried in a kinetic pressure bearing 31 on the side of the driving part 5 and an upper portion carried in a one-way kinetic pressure bearing 11. A chamber 12 for a lubricating liquid is formed between the kinetic pressure bearing 31 and the one-way kinetic pressure bearing 11, such that the driving shaft 10 extends therethrough. The main body of the artificial heart also has a casing 9. A plurality of suction openings 17 are axially formed in a portion of the casing 9 corresponding to the chamber 12 for a lubricating liquid. A filter 13 for hemofiltration covers the suction openings 17.

9. 发明专利

JPH05212109A BALLOON PUMPING SYSTEM 失效
公开(公告)号：JPH05212109A
公开(公告)日：1993-08-24
申请号：JP6277692
申请日：1992-02-03
申请人： SAN MEDICAL GIJUTSU KENKYUSHO
发明人： YAMAZAKI KENJI , MORI TOSHIO
IPC分类号： A61M1/10
摘要： PURPOSE:To provide a balloon pumping system allowing the use as an IABP balloon to a serious disease case in which the heart function is remarkably reduced by contracting the proximal part of a balloon inserted into the aorta from the remote part of the balloon with a phase at heat contracting period, and operating the proximal part of the balloon as a valve. CONSTITUTION:Since a pumping large balloon 6 and a valve small balloon 7 are simultaneously expanded at heart expanding period, expanding period pressure is raised to increase the coronary arterial blood stream quantity. At heart contracting period, for example, when a left ventricle 1 is in contracting period, an aortic valve 2 is opened to carry the blood to an aorta 3. The load on the left ventricle 1 reduced in contracting pressure is reduced since the pumping large balloon 6 is contracted, while the valve small balloon 7 acts as a valve since it remains expanded by a control system, to prevent the counter flow of the blood from a lower aorta 6 and suck the blood from the left ventricle 1 by a negative pressure. Thus, the balloon has a positive pumping effect and allows the use for a serious disease case in which the heart function is remarkably reduced.

10. 发明专利

JPH10248923A ANTI-THROMBUS TREATMENT OF ARTIFICIAL HEART 失效
公开(公告)号：JPH10248923A
公开(公告)日：1998-09-22
申请号：JP5950697
申请日：1997-03-13
申请人： SAN MEDICAL GIJUTSU KENKYUSHO , SEIKO EPSON CORP
发明人： MORI TOSHIO , YAMAZAKI KENJI , HIGUCHI KOJI , SATO SUSUMU
IPC分类号： A61M1/12 , A61L33/00 , A61M1/10
摘要： PROBLEM TO BE SOLVED: To improve anti-thrombosis while enabling prolonged maintenance thereof by forming a diamond-like carbon film on the surface and the internal surface of an artificial heart and also, enable firmly fastening of the film on a base material by a low temperature molding. SOLUTION: An artificial heart 1 is constituted of a cylindrical drive part 2, a pump part 3 connected to the drive part 2 and a nozzle part 4 to be inserted into a left ventricle. A surface layer is formed so as to make on interface between the base material and the surface layer and an anti-thrombus treatment is performed. In other words, a formation of a thin film by ion plating or evaporation is performed before or simultaneously with an ion implantation method or in an alternate manner. Atoms at a part of the thin film thus formed creeps into the base material by the impingement of ions during the implantation of ions. This enables forming of a diamond-like carbon film without any base material and interface thereby achieving an excellent anti-thrombosis and prolonged maintenance thereof.

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