Hand actuable clamping device with circumferentially extending tightening members

A clamping mechanism configured for threaded engagement with a complimentary threaded member for holding a working object relative thereto, said mechanism comprising:

• a flange surface disposed to abut against said working object in an operational mode of said device;
• a rotatable member configured with said flange surface and having a threaded center bore to longitudinally advance said flange surface upon rotation thereof on a threaded member, said rotatable member further comprising a gripping surface;
• and
• means for circumferentially extending said gripping surface to provide an increased effective diameter thereto for increasing a tightening force applied to said mechanism, said means disposed so as not to block access of the threaded member through said threaded center bore;
• and
• wherein said means are movable into a recess defined in said rotatable member in a non-extended position thereof.

A hand actuable clamping device configured for threaded engagement with a complimenting threaded member for holding an object relative thereto, said clamping device comprising:

• a flange surface disposed to abut against said object in an operational mode;
• a manually rotatable member with a threaded central bore configured with said flange surface to threadedly advance said clamping device upon rotation thereof on a threaded member extending through said central bore;
• at least one tightening lever disposed on said rotatable member, said lever movable from a stored position offset from said central bore to an extended position relative to said rotatable member wherein said lever extends circumferentially outward beyond said rotatable member and provides an increased effective gripping diameter and enhanced manual tightening or loosening of said device;
• and
• wherein said tightening lever is movable into a storage recess defined in said rotatable member.

A clamping mechanism configured for receipt on a threaded drive spindle for holding a working tool relative to the drive spindle, said mechanism comprising:

• a flange surface disposed to abut against a working tool in an operational mode of said device;
• a rotatable member configured with said flange surface and disposed to advance said flange surface upon rotation thereof;
• at least one tightening lever disposed on said rotatable member, said lever movable from a stored position to an extended position wherein in said extended position said lever extends circumferentially outward beyond said rotatable member and provides an increased effective diameter for said rotatable member thereby providing for enhanced tightening or loosening of said mechanism;
• said rotatable member defining a front face, said lever mounted on said front face, and said front face comprising a storage recess for said lever in said stored position;
• a pivot point for said lever defined on said front face, said pivot point disposed radially outward from a rotational axis of said mechanism;
• and
• wherein said lever extends generally tangentially from said pivot point relative to said rotational axis of said mechanism.

A clamping mechanism configured for receipt on a threaded drive spindle for holding a working tool relative to the drive spindle, said mechanism comprising:

• a flange surface disposed to abut against a working tool in an operational mode of said device;
• a rotatable member configured with said flange surface and disposed to advance said flange surface upon rotation thereof;
• at least two tightening levers disposed on said rotatable member, said lever movable from a stored position to an extended position wherein in said extended position said lever extends circumferentially outward beyond said rotatable member and provides an increased effective diameter for said rotatable member thereby providing for enhanced tightening or loosening of said mechanism;
• said rotatable member defining a front face, said levers mounted on said front face, and said front face comprising storage recesses for said levers in said stored position;
• a pivot point for said levers defined on said front face, said pivot points disposed radially outward from a rotational axis of said mechanism;
• and
• wherein said respective lever pivot points are radially opposite and said levers extend generally tangentially from said pivot points relative to said rotational axis of said mechanism in opposite directions from said front face.