1. A hearing aid, comprising:
a housing formed with an opening, a recess, an undercut, and an abutment;
each of said recess, said undercut, and said abutment being connected to said opening,
said abutment and said undercut being arranged on mutually opposite sides of said opening;
said opening, said recess, said undercut, and said abutment being configured to enable a retaining lug of an audio shoe to be inserted into the undercut through said opening and said recess by a rotational movement around a side of said opening in a vicinity of said undercut;
said abutment being configured to enable the retaining lug, which has been inserted into said undercut, to be removed from said undercut by a rotational movement around the side of the opening in the vicinity of said undercut; and
a lock configured for locking a locking component of an audio shoe inserted into said undercut against a rotational movement out of said undercut around the side of the opening in the vicinity of said undercut.
2. The hearing aid according to claim 1, which comprises electrical contact surfaces disposed to be accessed through said opening and said undercut, said contact surfaces being arranged in a vicinity of said undercut on an inner side of an exterior housing wall.
3. The hearing aid according to claim 1, wherein said lock comprises a notch with a latching lug.
4. The hearing aid according to claim 1, wherein said recess has an arc-shaped configuration around a side of said opening in the vicinity of said undercut.
5. An audio shoe, comprising:
a retaining lug configured for insertion into an undercut formed in a housing of a hearing aid according to claim 1, by rotational movement around a side of the opening in a vicinity of the undercut; and
a locking component configured for engagement with and interlocking with a lock of the hearing aid according to claim 1.
6. The audio shoe according to claim 5, wherein said retaining lug is formed with electrical contact surfaces disposed and configured to be brought into contact with electrical contacts, arranged in an undercut, of the hearing aid according to claim 2, when said retaining lug is inserted into the undercut of the housing of the hearing aid.
7. The audio shoe according to claim 5, wherein said locking component is brought into engagement with the lock by being actuated by an elastic force when the audio shoe with said retaining lug has been inserted into an undercut of the housing of the hearing aid according to claim 1.
8. The audio shoe according to claim 5, wherein the recess in the housing of the hearing aid has an arc-shaped configuration around a side of the opening in the vicinity of the undercut, and said retaining lug is formed with a convex arc-shaped surface on the side thereof oriented toward said recess during an insertion thereof into the undercut in the housing of the hearing aid.
9. A hearing aid system, comprising:
a hearing aid according to claim 1; and
an audio shoe including:
a retaining lug configured for insertion into said undercut formed in said housing of the hearing aid, by rotational movement around a side of said opening in a vicinity of said undercut; and
a locking component configured for engagement with and interlocking with the lock of the hearing aid.
10. A hearing aid, comprising:
a housing formed with an opening, a recess, an undercut, and an abutment, said housing having an exterior wall with an inner side;
each of said recess, said undercut, and said abutment being connected to said opening,
said abutment and said undercut being arranged on mutually opposite sides of said opening;
said opening, said recess, said undercut, and said abutment being configured to enable a retaining lug of an audio shoe to be inserted into the undercut through said opening and said recess by a rotational movement around a side of said opening in a vicinity of said undercut;
said abutment being configured to enable the retaining lug, which has been inserted into said undercut, to be removed from said undercut by a rotational movement around the side of the opening in the vicinity of said undercut;
a lock configured for locking a locking component of an audio shoe inserted into said undercut against a rotational movement out of said undercut around the side of the opening in the vicinity of said undercut; and
electrical contact surfaces disposed on said inner side of said exterior housing wall in a vicinity of said undercut, wherein said electrical contact surfaces are accessible through said opening and said undercut.
11. An audio shoe, comprising:
a retaining lug configured for insertion into an undercut formed in a housing of a hearing aid according to claim 10, by rotational movement around a side of the opening in a vicinity of the undercut; and
a locking component configured for engagement with and interlocking with a lock of the hearing aid according to claim 10;
said retaining lug carrying electrical contact surfaces disposed and configured to be brought into contact with said electrical contacts of the hearing aid according to claim 10 when said retaining lug is inserted into the undercut of the housing of the hearing aid.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A router bit for use with a rotary tool; said router bit comprising:
a body having an upper end and a lower end;
a collar extending outwardly from the lower end of the body; said collar joining the body at a transition point and terminating a distance therefrom in an end face; and wherein the distance between the transition point and end face constitutes the height of the collar;
a shaft extending outwardly from the end face of the collar; said shaft being of a smaller diameter than the collar; said shaft being adapted to be received within a bore of a chuck of the rotary tool; and wherein said end face of the collar is adapted to abut an outer surface of the chuck when the shaft is so received;
at least one unobstructed channel extending from the upper end of the body to the end face of the collar;
at least one cutter blade mounted on the body adjacent the at least one channel and terminating a distance inwardly from the end face of the collar and proximate the transition point; said at least one cutter blade being adapted to cut a profile into a workpiece.
2. The router bit of claim 1, wherein the transition point comprises a stepped shoulder that is of a diameter greater than the collar.
3. The router bit of claim 2, wherein the end face of the collar is adapted to rest on an upper surface of a router bit chuck when the shaft is received within a bore of the chuck; whereby the cutter blade is disposed substantially at least the height of the collar away from the upper surface of the chuck.
4. The router bit of claim 3, wherein the shaft has a terminal end and the terminal end is of a smaller diameter than is the shaft.
5. The router bit of claim 1, wherein the body, collar and shaft are integrally formed.
6. The router bit of claim 1, further comprising a roller guide bearing rotatably mounted to the upper end of the body.
7. In combination:
(a) a router having:
a motor; a drive shaft driven by the motor; and a chuck connected to the drive shaft; said chuck having an upper surface and defining a bore therein;
(b) a first router bit selectively connectable to the chuck, the first router bit comprising:
a first body having an upper end and a lower end;
a first collar extending outwardly from the lower end of the first body; said first collar joining the first body at a first transition point and terminating a distance therefrom in a first end face; and wherein the distance between the first transition point and the first end face constitutes the height of the first collar;
a first shaft extending outwardly from the first end face of the first collar; said first shaft being of a smaller diameter than the first collar; said first shaft being sized to be received within the bore of the chuck; and when so received, the first end face of the first collar rests on the upper surface of the chuck;
at least one unobstructed first channel extending from the upper end of the first body to the first end face of the first collar;
at least one first cutter blade mounted on the first body adjacent the at least one first channel and terminating proximate the first transition point; said at least one first cutter blade being adapted to cut a first profile into a first workpiece at a depth that is substantially equivalent to the height of the first collar;
c) a second router bit selectively connectable to the chuck, the second bit comprising:
a second body having an upper end and a lower end;
a second collar extending outwardly from the lower end of the second body; said second collar joining the second body at a second transition point and terminating a distance therefrom in a second end face; and wherein the distance between the second transition point and the second end face constitutes the height of the second collar;
a second shaft extending outwardly from the second end face of the second collar; said second shaft being of a smaller diameter than the second collar; said second shaft being sized to be received within the bore of the chuck; and when so received, the second end face of the second collar rests on the upper surface of the chuck;
at least one unobstructed second channel extending from the upper end of the second body to the second end face of the second collar;
at least one second cutter blade mounted on the second body adjacent the at least one second channel and terminating proximate the second transition point; said at least one second cutter blade being configured to be complementary in shape to the at least one first cutter blade; said at least one second cutter blade being adapted to cut a second profile into a second workpiece at a depth that is substantially equivalent to the height of the second collar; and wherein the respective heights of the first and second collars are complementary, so that when the first and second router bits are used to cut the respective first and second profiles in the first and second workpieces, an outer surface of the first workpiece is disposed substantially coplanar with an outer surface of the second workpiece when the first and second workpieces are interlockingly engaged with each other.
8. The combination of claim 7, wherein the first transition point comprises a first stepped shoulder that is of a diameter greater than the first collar.
9. The combination of claim 7, wherein the second transition point comprises a second stepped shoulder that is of a diameter greater than the second collar.
10. The combination of claim 7, wherein the first end face of the first collar is adapted to rest on an upper surface of the router bit chuck when the first shaft is received within the bore of the chuck; whereby the at least one first cutter blade is disposed at substantially at least the height of the first collar away from the upper surface of the chuck.
11. The combination of claim 10, wherein the second end face of the second collar is adapted to rest on an upper surface of the router bit chuck when the second shaft is received within the bore of the chuck; whereby the at least one second cutter blade is disposed at substantially at least the height of the second collar away from the upper surface of the chuck.
12. The combination of claim 7, wherein the heights of the first and second collars are substantially equal.
13. The combination of claim 7, wherein the first shaft terminates in a first terminal end and the first terminal end of the first shaft is smaller in diameter than is the first shaft.
14. The combination of claim 7, wherein the second shaft terminates in a second terminal end; and the second terminal end of the second shaft is smaller in diameter than the second shaft.
15. The combination of claim 7, wherein the first body, first collar and first shaft of the first router bit are integrally formed.
16. The combination of claim 7, wherein the second body, second collar and second shaft of the second router bit are integrally formed.
17. The combination of claim 7, further comprising a first roller guide bearing rotatably mounted to the upper end of the first body of the first router bit.
18. The combination of claim 7, further comprising a second roller guide bearing rotatably mounted to the upper end of the second body of the second router bit.
19. A router bit, comprising:
a body having an upper end and a lower end;
a collar extending outwardly from the lower end of the body; said collar joining the body at a transition point and terminating a distance therefrom in an end face; and wherein the distance between the transition point and end face constitutes the height of the collar; and wherein the transition point comprises a stepped shoulder that is of a diameter greater than the collar;
a shaft extending outwardly from the end face of the collar; said shaft being of a smaller diameter than the collar;
at least one unobstructed channel extending from the upper end of the body to the end face of the collar;
at least one cutter blade mounted on the body adjacent the at least one channel and terminating proximate the transition point; said at least one cutter blade being adapted to cut a profile into a workpiece; and wherein the end face of the collar is adapted to rest on an upper surface of a router bit chuck when the shaft is received within a bore of the chuck; whereby the at least one cutter blade is disposed substantially at least the height of the collar away from the upper surface of the chuck.
20. The router bit of claim 19, wherein the shaft has a terminal end and the terminal end is of a smaller diameter than is the shaft.
21. The router bit of claim 19, wherein the body, collar and shaft are integrally formed.
22. The router bit of claim 19, further comprising a roller guide bearing rotatably mounted to the upper end of the body.
23. A router bit kit for use with a rotary cutting tool and comprising:
a first router bit having:
a first cutter blade adapted to cut a first profile in a first workpiece;
a first position stop disposed a first distance from the first cutter blade; said first position stop being adapted to abut an outer surface of a chuck of the rotary tool when the first router bit is engaged therewith and to thereby hold the first cutter blade the first distance away from the outer surface of the chuck;
a second router bit having:
a second cutter blade adapted to cut a second profile in the second workpiece; whereby said second profile is complementary to the first profile in the first workpiece;
a second position stop disposed a second distance from the second cutter blade; said second position stop being adapted to abut the outer surface of the chuck when the second router bit is engaged therewith and to thereby hold the second cutter blade the second distance away from the outer surface of the chuck; whereby an outer surface of the first workpiece is aligned with an outer surface of the second workpiece when the first and second profiles on the first and second workpieces are butted together.
24. The router bit kit as defined in claim 23 wherein the first router bit further includes a continuous first chip channel that runs alongside the first cutter blade and terminates at a chuck-engaging surface of the first position stop.
25. The router bit kit as defined in claim 23 wherein the second router bit further includes a continuous second chip channel that runs alongside the second cutter blade and terminates at a chuck-engaging surface of the second position stop.