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Title: Net post suitable for use in ball games
Claims: What is claimed is: 1. A net post for use in ball games comprising an upstanding hollow cylindrical support, a hollow cylindrical slider telescopically disposed in said support for upward and downward movement, a screw rod coaxially disposed within said support for driving said slider, first and second toothed bevelled wheels for transmitting a rotational force to said screw rod, a handle for imparting said rotational force to the first said toothed bevelled wheel, a block fixed in said slider and threadedly engaged with an upper portion of said screw rod, a shaft portion integrally formed at the lower end of said screw rod and extending downwards, a first bearing plate fixed in the inner circumferential surface of said support and having a bore through which said shaft portion extends, a first bearing mounted on said first bearing plate rotatably supporting said shaft portion, said second toothed bevelled wheel being mounted on the lower end of said shaft portion, said first toothed bevelled wheel being perpendicularly engaged with said second toothed bevelled wheel, a handle axle transversely extending in said support and supporting said first toothed bevelled wheel, said handle axle having an extended end positioned outside said support, a second bearing disposed in an opening provided in said support, said handle axle having one end rotatably supported in said second bearing, a third bearing secured at the internal circumferential surface of said support, said handle axle having a second end rotatably supported in said third bearing, a second bearing plate mounted on the outer surface of said support and supporting said second bearing, said handle being removably connected to said extended end of said handle axle, a guide wheel rotatably mounted at the top end of said slider and a hook secured on the support for the attachment of one end of a rope on which a net is hung, said rope extending on said guide wheel. 2. A net post for use in ball games as claimed in claim 1, which further comprises a metal cylindrical guide fitting fitted over the upper end of said support, said guide fitting having an inner circumferential surface with a longitudinal projection and being fixed at the lower end thereof to said support, said slider being provided at the outer circumferential surface thereof with a longitudinal groove which is slidably engaged on said longitudinal projection of said guide fitting, whereby said slider can move upwards and downwards without rotation. 3. A net post for use in ball games as claimed in claim 1 wherein said axle, said second bearing, said first toothed wheel and said second bearing plate constitute an assembly which is detachable from said cylindrical support by detaching said bearing plate from said support and extracting the axle, the second bearing and the first toothed wheel through said opening provided in the support. Other info: Inventors: Senoh, Yoshimasa (Tokyo, JP) Application Number: 736935 Filing Date: 1976-10-29 Publication_date: 1978-10-24 Assignee: Senoh Kabushiki Kaisha (Tokyo, JP) Primary Class(es): 473/492 Other Classes: US Patent Ref:
Other Refs:
Primary Examiner: Pinkham, Richard C. Assistant Examiner: Brown, T. Attorney: Haseltine, Lake & Waters |
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