Support device
A support device ( 10 ) is illustrated comprising a body ( 14 ) defining a recess ( 22 a ) in its underside, a connector ( 24 ) to which a vacuum device can be connected, the connector ( 24 ) and recess ( 22 a ) communicating with one another so that the vacuum device can extract air from the recess ( 22 a ), the body ( 14 ) further defining a passage ( 22 b, 26 ) through which a drill bit ( 12 ) can extend, in use, at least part of the periphery of the passage ( 22 b, 26 ) serving to support the drill bit ( 12 ), in use.
1 . A support device comprising a body defining a recess in its underside, a connector to which a vacuum device can be connected, the connector and recess communicating with one another so that the vacuum device can extract air from the recess, the body further defining a passage through which a drill bit can extend, in use, at least part of the periphery of the passage serving to support the drill bit, in use, wherein the device further comprises a cover member moveably mounted upon the body, wherein the passage is provided by an opening in the body and by a generally V-shaped notch in the cover member, wherein the cover member can be positioned so as to close the passage, at least in part, so as to allow it to largely obstruct the opening when positioned for use with a smaller drill bit.
2 . The device according to claim 1 , wherein the passage and the recess communicate with one another.
3 . The device according to claim 1 , wherein the passage and the recess are separated from one another by a partition.
4 . The device according to claim 3 , wherein a plurality of notches are formed in the partition.
5 . The device according to claim 4 , wherein the notches are located in an edge of the partition that, in use, faces towards a wall in which an opening is being formed.
6 . The device according to claim 3 , wherein the partition is of generally V-shaped form.
7 . The device according to claim 6 , wherein a plurality of notches are formed in the partition, and wherein one of the notches is located adjacent the apex of the generally V-shaped partition.
8 . The device according to claim 7 , wherein others of the notches are located close to ends of the partition.
9 . The device according to claim 1 , wherein the cover member is shaped to define a generally V-shaped notch.
10 . The device according to claim 1 , wherein the opening is of generally tear-drop shaped form, including a section of generally circular shape, and a section defined by generally tangentially extending walls, interconnected by a curved part of a smaller radius of curvature.