| 摘要 |
A force-transmitting system including a cylindrical fiber-reinforced resin tube to which stress is transferred simultaneously via both the outside and inside surfaces of the tube, is disclosed. The system utilizes a drivable fitting which includes an external rigid coupling sleeve and an internal radially expansible circumferential arrangement of elongated wedge elements, defining between the former and the latter an annular cylindrical space in which one end region of the tube wall can be received and radially clamped. Distribution of stress transfer over the entire expanse of the clamped portion of the tube is provided for by means of a pair of substantially coextensive, circumferentially continuous, uniform thickness layers of elastomeric material bonded to the outside and inside tube surfaces, respectively. An expansible metal liner sleeve is bonded to the inner surface of the inner elastomer layer to prevent the latter from being extruded between the wedge elements, and the external surfaces of the latter may be roughened for positive gripping engagement with the inner surface of the liner sleeve.
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