Winding – tensioning – or guiding – Coil holder or support – Radially expansible or contractile
Patent
1997-08-13
1998-09-08
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Radially expansible or contractile
279 207, B65H 7524
Patent
active
058033998
ABSTRACT:
An expandable shaft comprises: a shaft body having a central axis and an outer cylindrical surface; a fluid passageway extending along the central axis of the shaft body; fluid introducing ports radially outwardly extending and communicating with the fluid passageway; a fluid filling to the fluid passageway and the fluid introducing ports; grooves extending on the outer cylindrical surface of the shaft body in a direction of the central axis of the shaft body, wherein each groove communicates with the respective introducing ports; and long lugs slidably inserted into the grooves, wherein the long lugs are elastically returned in the grooves when a fluid pressure by the fluid is eliminated, and the long lugs are protruded from the outer cylindrical surface when the fluid pressure is applied. Thus, the long lugs are able to stroke within the limits of the difference of the angle between the sloped bottom portion of the long lugs and the sloped locking surface of the grooves.
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patent: 5518203 (1996-05-01), Annaka et al.
Japan Development Consultants, Inc.
Jillions John M.
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