Anti-rotation locking units, and apparatus equipped therewith

A clamping collar having:

• a collar belt terminated by two end-blocks at least one of which is tubular;
• a threaded bolt extending through said tubular end block and engaging said other end-block, thereby to be operable to draw said end-blocks towards each other and correspondingly tighten said collar-belt;
• a tool grip element operatively connected to said threaded bolt;
• first engagement means which are integral with said tubular end-block;
• an annular locking member having a coupling formation and second engagement means, said annular locking member being axially movable with respect to said tubular end-block between a locking position in which said coupling formation is engageable with said tool grip element thereby to be rotatably fast therewith and in which said first and second engagement means are in mutual engagement, and a release position in which at least one of said coupling formation and said second engagement means are disengaged from said tool-grip element and from said first engagement means respectively;
• return means biassing said locking member into said locking position.

An anti-rotation locking unit comprising:

• a support member having a mounting portion, a lock-support portion and first engagement means;
• a locking member having a bearing portion which is movably supported by said lock-support portion of said support member between a locking position and a release position, a coupling formation, and second engagement means, wherein, at least in said locking position of the locking member, said first and second engagement means are mutually engaged so as to prevent rotation of said locking member with respect to said support member;
• and
• a return means mounted operatively between said locking member and said support member for biassing said locking member into said locking position,
• and wherein the first and second engagement means are arranged as abutment means preventing axial movement of the locking member with respect to the support member beyond said locking position.

An anti-rotation locking unit comprising:

• a support member having a mounting portion, a lock-support portion and first engagement means;
• a locking member having a bearing portion which is movably supported by said lock-support portion of said support member between a locking position and a release position, a coupling formation, and second engagement means, wherein, at least in said locking position of the locking member, said first and second engagement means are mutually engaged so as to prevent rotation of said locking member with respect to said support member;
• and
• a return means mounted operatively between said locking member and said support member for biassing said locking member into said locking position,
• wherein said coupling formation comprises an internal hexagonally profiled surface.

In an apparatus having a first element and a second element which is rotatable with respect to the first element, an anti-rotation locking device comprising:

• a first engagement means which is made stationary with respect to the first element;
• a locking member having coupling means and a second engagement means, said locking member being axially slidable with respect to the first element between a locking position in which said coupling means is capable of coupling for common rotation with said second element whereas said first and second engagement means are in mutual engagement preventing rotation of said locking member with respect to said first element, and a release position in which at least one of said coupling means and said second engagement means is disengaged from said second element and from said first engagement means respectively;
• a return means biassing said locking member into said locking position, wherein in said locking position said coupling means engages a tool engagement formation of said second element, and said locking member has a front abutting face around said second element, whereby a tool being axially engaged by a user onto said tool engagement formation simultaneously repels said locking member into the release position against said return means,
• wherein in said release position the coupling means remain engageable with said tool engagement formation of said second element and said first and second engagement means are disengaged from each other.

In an apparatus having a first element and a second element which is a threaded element having a hexagonal formation and is rotatable with respect to the first element, an anti-rotation locking device comprising:

• a first engagement means which is made stationary with respect to the first element;
• a locking member having coupling means and a second engagement means, said locking member being axially slidable with respect to the first element between a locking position in which said coupling means being an internal hexagonally profiled annular surface is capable of coupling for common rotation with said second element whereas said first and second engagement means are in mutual engagement preventing rotation of said locking member with respect to said first element, and a release position in which at least one of said coupling means and said second engagement means is disengaged from said second element and from said first engagement means respectively;
• a return means biassing said locking member into said locking position, wherein in said locking position said coupling means engages a tool engagement formation of said second element, and said locking member has a front abutting face around said second element, whereby a tool being axially engaged by a user onto said tool engagement formation simultaneously repels said locking member into the release position against said return means.