| 摘要 |
PURPOSE:To simplify the structure of a static screw as well as to make its manufacturing and assembling ever so easy, by installing an outer cylinder through which a fluid is fed to the outer circumferential part of a nut consisting of a perforated body capable of screwing an external thread. CONSTITUTION:An outer cylinder 10 airtightly fitted in the outer circumferential surface of a nut 9 consisting of a perforated body to be screwed on an external thread 8 is provided with each of side plates 11 at both sides. The compressed fluid fed out of a pump passes a flow passage 13 by way of connecting piping and led into a peripheral step part 12. This compressed fluid being led into the peripheral step part 12 passes through a lot of fine clearances that the porous- type nut 9 has, and fed to all over the surface of a face-to-face part between the nut 9 and the external thread 8, while rigidity is given by means of a choke effect that is produced in time of passing through these fine clearances of the nut 9, thus it operates as a static screw. |
