Telescopic guide, especially for transmittance of torque

摘要: A telescoping torque transmitting shaft comprising a having at least three longitudinally extending circumferentially spaced guide grooves and sleeve axially slidably surrounding the an inner counter groove opposite each groove. Torque is transmitted between by row of balls for groove, ball being partially received in its At certain one are resilient elastic material; all others substantially harder. Bias imposed upon balls, urging lateral direction relative to sleeve, maintains every contact with both while harder other rows, such contact, maintain compressed exerting bias.