Patent ID: 8197253
Filing Date: 2012-06-12
Classification: A61C

Abstract:
1. A medical or dental handpiece head comprising: a head sleeve and a closing cap, whereby the head sleeve and the closing cap can be repeatably and detachably joined together via a threaded screw connection, and a locking device for locking the closing cap with the head sleeve, the handpiece head having a longitudinal axis extending in a direction that the closing cap moves while being screwed onto the head sleeve, wherein the locking device is formed by at least one spring element having at least one free end and the locking device is designed and arranged so that unintentional release of the screw connection between the closing cap and the head sleeve caused by vibrations during operation of the handpiece head can be suppressed, and wherein the at least one spring element is under pretension, while the cap is being screwed on the head sleeve, to spring in only a radial direction away from, and perpendicular to, the longitudinal axis so that it can be moved radially between a first released position and a second tightened position so that in the second tightened position, the spring element remains radially spaced apart from the closing cap to define a gap between the spring element and the closing cap and wherein the radial movement of the at least one spring element is achieved by screwing the closing cap on the head sleeve; wherein the at least one spring element includes a nose having a first radius and opposing legs having a second radius, different than the first radius.