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3. 发明专利

GB2149065A Valve 未知
公开(公告)号：GB2149065A
公开(公告)日：1985-06-05
申请号：GB8329353
申请日：1983-11-03
申请人： MAEZAWA KASEI KOGYO KK
发明人： AKIRA NOMURA
IPC分类号： F16K3/28 , F16K27/04
摘要： A valve comprises a housing (46) of synthetic resin composed of a pipe member (12) and a tubular member (14); a substantially conical closure member main body (23) of synthetic resin having a substantially spherical lower end; and guide grooves of arcuate section matching the curve of the outer peripheral surface of the closure member (23) are formed along the inner peripheral wall of the pipe member (12), while a valve seat part (31) of the pipe member (12) is formed to have the same surface shape as that of the flow passage (39) so as to allow smooth fluid flow without deposition of extraneous matter. The closure member (23) may be coated with a fluoroplastic to reduce friction and may be grooved (Fig. 6) or ridged (Figs. 7-10) at (31) in a direction perpendicular to the flow passage (39).

4. 发明专利

IT1169930B Slide valve with plastics body 未知
公开(公告)号：IT1169930B
公开(公告)日：1987-06-03
申请号：IT2359983
申请日：1983-11-04
申请人： MAEZAWA KASEI KOGYO KK
发明人： NOMURA AKIRA
IPC分类号： F16K20060101 , F16K
摘要： The slide valve has a plastics body (46) with a tubular portion (12) forming a through duct (39). A second tubular portion (14) at right angles to the portion (12) forms a guide for the slider (23). The slider (23) is in the form of a cone with a slight taper which runs into a hemispherical end (24). The internal contour of the valve body is shaped to match the contour of the slider.

7. 发明专利

GB2024373A Butterfly valve 未知
公开(公告)号：GB2024373A
公开(公告)日：1980-01-09
申请号：GB7900372
申请日：1979-06-05
申请人： MAEZAWA KASEI KOGYO KK
IPC分类号： F16K27/00 , F16K1/22 , F16K1/226 , F16K27/02 , F16K27/04
摘要： The valve casing 1 is made of synthetic plastics and has axially extending reinforcing ribs (23), Figs. 1, 3 and 4 (not shown), formed on its outer circumferential surface. Hollow cylindrical pipe connectors 2 also of synthetic plastics are fastened to one another, as by bolts 25, with said valve casing clamped therebetween. The butterfly disc 8 is rotated by a shaft 21 through a reduction drive constituted by a threaded spindle 22 and an axially movable and rotatable member 15 having circumferential grooves 17 of varying helix angle cooperating with fixed balls 19.

8. 发明专利

GB2012396A BUTTERFLY VALVE 未知
公开(公告)号：GB2012396A
公开(公告)日：1979-07-25
申请号：GB7847333
申请日：1978-12-06
申请人： MAEZAWA KASEI KOGYO KK
IPC分类号： F16K1/22 , F16K31/528
摘要： A butterfly valve made of a synthetic resin comprising; a valve casing, a valve plate, a valve shaft connected to said valve plate, pivoted turnably to said valve casing and having one end thereof protruding into an axial cylinder formed to protrude from said valve casing, and a rotary moving member engaged with the outer circumference of said valve shaft turnably and slidably in the axial direction, retarding the rotation of an operation handle shaft and transmitting it to said valve shaft.

9. 发明专利

IT1100748B 未知
公开(公告)号：IT1100748B
公开(公告)日：1985-09-28
申请号：IT3092378
申请日：1978-12-15
申请人： MAEZAWA KASEI KOGYO KK
IPC分类号： F16K1/22 , F16K31/528 , F16L
摘要： A butterfly valve made of a synthetic resin comprising; a valve casing, a valve plate, a valve shaft connected to said valve plate, pivoted turnably to said valve casing and having one end thereof protruding into an axial cylinder formed to protrude from said valve casing, and a rotary moving member engaged with the outer circumference of said valve shaft turnably and slidably in the axial direction, retarding the rotation of an operation handle shaft and transmitting it to said valve shaft.

10. 发明专利

DE3340004A1 Slide valve device 未知
公开(公告)号：DE3340004A1
公开(公告)日：1985-05-23
申请号：DE3340004
申请日：1983-11-04
申请人： MAEZAWA KASEI KOGYO KK
发明人： NOMURA AKIRA
IPC分类号： F16K3/28 , F16K27/04
摘要： A slide valve device having the following features: - a valve cage which is manufactured from synthetic resin and has a tube part which forms a flow channel, and a tubular part which projects upwards from a valve seat formed in an opening in the circumferential surface of the tube part, - an essentially conical main body of the valve made of synthetic resin, with an essentially spherical lower end, which main body is inserted from the direction of the tubular part into the flow channel of the tube part, through the valve seat, in order to open and close the flow channel, and - guide grooves of arcuate cross-section which match the curvature of the outer circumferential surface of the main body of the valve seat are formed along the inner circumferential wall of the tube part of the valve cage. A valve seat portion of the tube part on which the essentially spherical end of the main body of the valve presses is designed in such a way that it has essentially the same surface form as that of the flow channel.

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