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1. 发明专利

JPS62814A NONOCIRCULAR GEAR OF POSITIVE DISPLACEMENT FLOWMETER 失效
公开(公告)号：JPS62814A
公开(公告)日：1987-01-06
申请号：JP13994085
申请日：1985-06-26
申请人： OVAL ENG CO LTD
发明人： HOTTA KOJI
IPC分类号： G01F3/10
摘要： PURPOSE:To increase the durability of a flowmeter and to improve its precision by composing a couple of noncircular gears of pitch curves which make rotary motion energy and relative angular acceleration invariably constant. CONSTITUTION:The couple of noncircular gears of a positive displacement flowmeter which has the noncircular gears as a main drive part is composed of pitch curves 10 which make the rotary motion energy and relative angular velocity invariably constant. The pitch curves 10 make the relative angular velocity constant between respective projection points of a long and a short diameter. Thus, the noncircular gears whose motion energy and relative angular velocity have constant-pitch curves are realized, so mutual inertia force operating on those noncircular gears becomes constant. Consequently, there is not local were of tooth forms and the durability increases. Further, an increase inn friction torque with tooth form contacting force is eliminated, so the instrument precision of the flowmeter is improved.

2. 发明专利

JPS6123883A Rotary piston pump 失效
标题翻译：旋转活塞泵
公开(公告)号：JPS6123883A
公开(公告)日：1986-02-01
申请号：JP14168684
申请日：1984-07-09
申请人： Oval Eng Co Ltd
发明人： HOTTA KOJI
IPC分类号： F04C9/00
摘要： PURPOSE: To obtain a swingable pump in which vibration and noise are little by meshing a noncircular gear with a noncircular sun gear and meshing a circular gear installed onto the planetary gear with a circular gear having swingable vanes connected and installing a crank-shaped driving shaft onto the planetary gear.
CONSTITUTION: Noncircular planetary gear 11 is installed onto a noncircular sun gear 21 fixed onto a casing. A circular gear 12 is connected to the planetary gear 11, and connected to a swingable vane shaft 20 through a circular gear 22. A driving shaft 10 is formed into crank form and connected to the planetary gear shaft. Therefore, the speed and the acceleration speed of the vane can be reduced to zero at the dead point of the swingable vane, and smooth operation is permitted, and the generation of vibration and noise of the pump can be prevented.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过将非圆形齿轮与非圆形太阳齿轮啮合并啮合安装在行星齿轮上的圆形齿轮，获得摆动泵，该摆动泵与具有可摆动叶片的圆形齿轮啮合并安装曲柄形驱动轴到行星齿轮上。构成：将非圆形行星齿轮11安装在固定在壳体上的非圆形太阳齿轮21上。圆形齿轮12连接到行星齿轮11，并通过圆形齿轮22连接到可摆动叶片轴20.驱动轴10形成为曲柄形并连接到行星齿轮轴。因此，在可摆动叶片的死点处，叶片的速度和加速度可以降低到零，并且允许平稳的操作，并且可以防止泵的振动和噪声的产生。

3. 发明专利

JPH03296624A FLOWMETER OR PUMP 失效
公开(公告)号：JPH03296624A
公开(公告)日：1991-12-27
申请号：JP9993790
申请日：1990-04-16
申请人： OVAL ENG CO LTD
发明人： HOTTA KOJI
IPC分类号： G01F3/10 , F04C2/18
摘要： PURPOSE:To achieve a higher reliability with a reduction in pulsation rate by a method wherein a three-lobe gear is interposed between two-lobe gears the same in shape and size and they are meshed so that rotary motions of the gears synchronize one another alternately to make paths for inflow and outflow communicate with weighing chambers. CONSTITUTION:It is so arranged that two-lobe gears 42 and 43 always contact a three-lobe gear 41 and weighing chambers 61-63 are made to communicate with one another. When a fluid to be measured flows into weighing chambers 62 and 63 at flow rates Q11 and Q12 as indicated by the arrow, a pressure P1 works as torque equal pertaining to an axis o2 of the gear 42 on the side of a passage 21 and a rotary torque works on the side A of a weighing chamber 61 clockwise in a direction of the arrow omega1 pertaining to the gear 41. As the gear 42 is meshed with the gear 41, it is driven to rotate counterclockwise in the direction of the arrow omega2. On the other hand, between the gear 41 and the gear 43, a rotary torque is generated counterclockwise in the direction of the arrow omega3 in a left half of the gear 41. Thus, receiving the rotary torque, the fluid is made to flow out as flow rate Q22+Q21 from the outflow paths 22 and 220.

4. 发明专利

JPH0242183A FLUID ROTARY MACHINE 失效
公开(公告)号：JPH0242183A
公开(公告)日：1990-02-13
申请号：JP19392988
申请日：1988-08-02
申请人： OVAL ENG CO LTD
发明人： OSADA SHIGEYOSHI , HOTTA KOJI
IPC分类号： F04B1/10 , F04B1/107 , F04B1/113
摘要： PURPOSE:To obtain a small-sized rotary machine with low noise by inserting a cylindrical rotary cylinder into the cylinder chamber of a casing having an intake port and a discharge port, inserting a piston into a through hole formed in the diameter direction on this rotary cylinder, and interlockingly moving them. CONSTITUTION:A rotary cylinder 2 made of a cylinder body 21 is inserted into the cylinder chamber 17 of a casing 1 having a wall face intake port 13 with a large opening angle communicated to an intake port 11 and a wall face discharge port 14 with a small opening angle communicated to a discharge port 12, a piston 3 provided with cylindrical bodies 32 on both ends is inserted into a through hole 22 formed in the diameter direction on the rotary cylinder 2. The rotating period of the rotary cylinder 2 and the sinusoidal sliding period of the piston 3 in the rotary cylinder 2 are made equal by a rotation transmission mechanism 4. The volume formed by the casing 1 and the piston 3 in the rotary cylinder 2 is repeatedly increased or decreased, thus a fluid is sucked or discharged.

5. 发明专利

JPH01285683A INSCRIBING TYPE GEAR PUMP 失效
公开(公告)号：JPH01285683A
公开(公告)日：1989-11-16
申请号：JP11672988
申请日：1988-05-12
申请人： OVAL ENG CO LTD
发明人： HOTTA KOJI
IPC分类号： F04C2/10
摘要： PURPOSE:To meet intermeshing condition with no dead space by making tooth profiles of an outer rotor and an inner rotor circular arcs on a parts of top portions and bottom portions for meshing each other, and connecting together circular arcs of neighboring top portion and bottom portion of each with a continuous curve. CONSTITUTION:An inner rotor I and an outer rotor II are contacted together at a top circular arc b-a-b and a bottom circular arc B-A-B in the second and the third quadrant. The rotor I is thought to rotate in clockwise around the center O' under this condition. The rotor II is given with rotary motion being inversely proportional to gear ratio by a rotation transmitting mechanism, and a circular arc part ED of the rotor II in the third quadrant X1OY2 is contacted nearly slidingly with a curve c-d of the rotor I, and a curve D-E-D and a circular arc rotate so as to slidingly contact with curves d-e-d and d-c, respectively in order. Further, (A-B) of the corresponded rotor II is contacted with (a-b) of the rotor I, and curves (C-D) and (D-E) contacting with (c-d) and (d-e) slidingly, in another quadrant.

6. 发明专利

JPS6347618A FLUID MACHINE ROTOR BY UNEVEN TOOTH TYPE SPUR GEAR 失效
公开(公告)号：JPS6347618A
公开(公告)日：1988-02-29
申请号：JP19100686
申请日：1986-08-14
申请人： OVAL ENG CO LTD
发明人： OSADA SHIGEYOSHI , HOTTA KOJI
IPC分类号： G01F3/10 , F04C18/18
摘要： PURPOSE:To facilitate phase alignment by dispensing with a pilot gear and to improve workability, by providing a small tooth form between a large addendum tooth form and a dedendum tooth form and setting a simultaneous intermeshing rate to 1 or more. CONSTITUTION:An addendum 10 having a large tooth form of a curve A-B of rotors 1, 2 is set to a cycloid curve wherein a pitch circle is a rolling circle and a dedendum 11 is set to a trochoid curve of a curve H-J to bring point other than a point H to a non-contact state and an intermediate part is set to a small tooth form 12 and a simultaneous contact rate is set to 1 or more. Since seal points are set to C1-P-C2', C2-P-C1' and b1-P-b2', b2-P-b1', the variation of rotary torque due to fluid pressure difference P1-P2 is made min. to smooth rotation. Since discharge quantity is made large, miniaturization is achieved and, since an intermeshing rate is enlarged, a pilot gear is made unnecessary and a structure can be made simple and assembling can be made easy.

7. 发明专利

JPH03156101A MULTIPLE CONTACT ROLLER 失效
公开(公告)号：JPH03156101A
公开(公告)日：1991-07-04
申请号：JP29643289
申请日：1989-11-14
申请人： OVAL ENG CO LTD
发明人： HOTTA KOJI
IPC分类号： F01C1/22
摘要： PURPOSE:To enable the compression ratio of a roller to be approximately infinite by making the tooth number of an inner gear, which has close contact with the inner periphery of an outer gear at two or more positions all times and eccentricly rotates, to be one more than that of the outer gear. CONSTITUTION:In an outer gear I which has one tooth, an inner gear II which has two teeth has contact with the inner periphery of the outer gear I at two positions Q1, Q2 all times and eccentrically rotates through a gear IV which is installed inside the inner gear II and interlocked with a driving gear III. In this case, if it is a standard when a volume A formed between the inner gear II and the outer gear I is zero and a rotational angle phi is zero, an interlocking point P between the driving gear III and the gear IV is then advanced gammatheta deg. to the axial line of the outer gear I. When the inner gear II rotates (5pi/2+gammatheta) deg., the volume A is maximum. Accordingly, every time the inner gear II rotates (5pi/2+gammatheta) deg., the volume A is repeatedly cycled as zero-maximum-zero and the compressed ratio can therefore be infinite.

8. 发明专利

JPH0219673A ELASTIC TUBE PUMP 失效
公开(公告)号：JPH0219673A
公开(公告)日：1990-01-23
申请号：JP17017288
申请日：1988-07-08
申请人： OVAL ENG CO LTD
发明人： HOTTA KOJI
IPC分类号： F04C5/00
摘要： PURPOSE:To lessen compressive stress acting upon an elastic tube so as to increase fatigue strength and make the device compact by arranging roller shafts obliquely with respect to the tube in a press method pressing the elastic tube intercommunicating to a supplying source by press rollers. CONSTITUTION:A press roller 32 moves in order of a1-a7 in the arrow R direction, and three rollers 32 are arranged equally, and an elastic tube 22 is wound one time on to a P section on the circumference of a capsule main body 21. Accordingly, the tube 22 is fixed inclining at an angle theta with respect to the R direction, and the rollers 32 always press in a view MN section and move in the R direction. In momentary positions in this section, the tube 22 is pressedly sealed at the positions of P1, P2, P3 respectively when the axis of the tube is located at a3-a3, a4-a4, a5-a5 in this order, and thereby liquid maintains the content volume of the tube 22 of P1-P2 and P2-P3 and is sent in the arrow Q direction. The tube 22 is pressed at an angle theta with the R direction here, and thereby sealing area becomes larger sec theta times than when the tube 22 is pressed at right angle with the R direction so that sealing property is enhanced in compliance with theta.

9. 发明专利

JPH01249976A ROTARY COMPRESSOR 失效
公开(公告)号：JPH01249976A
公开(公告)日：1989-10-05
申请号：JP7756288
申请日：1988-03-30
申请人： OVAL ENG CO LTD
发明人： HOTTA KOJI
IPC分类号： G01F3/10 , F04C18/18
摘要： PURPOSE:To discharge uniform compressed air over a wide range of rotation by forming a two-lobe type rotor of a convex arc as addendum tooth form and a concave arc as deddenbum tooth form. CONSTITUTION:Rotors 2, 2' are of two-lobe type making contact with each other through pitch circles 23, 23', and respectively formed with a combined tooth form of a convex arc centering around a pitch point 24 as an addendum tooth form and a cycloidal curve and a concave arc tooth form centering around a pitch point 25 as a deddendum tooth form. In the compression stroke of 0-pi/2, two times pressure is applied in the manner of exponential function and in the next stroke of pi/2, a discharge is carried out with a certain pressure. Also, a rotary compressor having a pair of same shape and size rotors differing in the phase of pi/2 from each other is connected in parallel so that a certain discharge pressure is obtained.

10. 发明专利

JPS62194419A VOLUME TYPE FLOWMETER 失效
公开(公告)号：JPS62194419A
公开(公告)日：1987-08-26
申请号：JP3677186
申请日：1986-02-21
申请人： OVAL ENG CO LTD
发明人： HOTTA KOJI
IPC分类号： G01F3/10
摘要： PURPOSE:To enable a rotor motion at an equal flow rate and without a pulsation to be obtained regardless of the kind of a fluid to be measured by providing a condition wherein an areal velocity is constant when the free rotational motion of the rotor is conducted. CONSTITUTION:A pair of rotors 11 and 12 each having the configuration of an envelope with a radium (r) represented by the equation are pivotally supported in a measuring chamber 51. The rotors 11 and 12 have shafts 41 and 42 in the measuring chamber 51 as their shafts and receive a rotational torque in the direction shown by an arrow R by a flow in the direction shown by an arrow B. Timing gears 21 and 22 coaxially engaging with each other in a timing gear chamber 7 are fixedly mounted to shafts 41 and 42 and rotatably supported by bearings 61 and 62, respectively. Thus, a flow rate is measured according to the rotational torque due to a flow without a pulsation.

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