Disposable hub for a surgical cutting instrument

Claim 2

A surgical cutting instrument, comprising: a hollow hub having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion defining a cavity and having a lock member projecting from an outer surface of said connection portion, an outer tubular member having a length sized for insertion into an anatomical space, said outer tubular member defining a central bore along said length of said outer tubular member, said outer tubular member having a proximal end attached to said working end of said hub and a distal end, said outer tubular member defining a cutting opening adjacent said distal end and sized to receive tissue therethrough; a cutting member slidably disposed within said central bore of said outer tubular member, said cutting member having a first operational end defining a cutting head and a second engagement end disposed proximal to said cavity of said hub; a powered hand-piece including a source of motion and an outer shell defining an outer gripping portion; a hollow hub connector having a length and a cylindrical wall with a hand-piece connection portion and a hub engagement portion, said hand-piece connection portion disposed within the hand-piece, said hub engagement portion defining a chamber for receiving said connection portion of said hub, said chamber having a longitudinal axis parallel to said length, said hub engagement portion further defining a channel through said cylindrical wall for receiving said lock member, said channel in communication with said chamber and having, a longitudinal section defined along the length of said hub connector, a second transverse section communicating with said longitudinal section at a first end and having a second opposite end, a locking recess defined in said wall perpendicularly to said transverse section and in communication with said opposite end of said transverse section, said locking recess sized to receive said lock member, whereby said connection portion of said hub is slidable within said chamber along said longitudinal axis when said lock member is disposed within said longitudinal section of said channel and said connection portion of said hub is rotatable within said chamber when said lock member is disposed within said transverse section of said channel and said connection portion of said hub fixed within said chamber when said lock member is disposed within said locking recess; and a spring element disposed on said connection portion of said hub, said spring element configured to urge said lock member into said locking recess when said lock member is rotated into said opposite end of said transverse section of said channel, said spring element having a squeezed position when said lock member is in said transverse section of said channel and a substantially at rest position when said lock members is in said locking recess, said spring element being a beam spring disposed at the connection end of said hub, said beam spring including a beam having a first surface facing said connection end and a second opposite face.

Claim 3

The instrument of claim 1 , wherein said spring element further comprises a boss projecting from said opposite face of said beam.

Claim 4

A surgical cutting instrument, comprising: a hollow hub having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion defining a cavity and having a lock member projecting from an outer surface of said connection portion; an outer tubular member having a length sized for insertion into an anatomical space, said outer tubular member defining a central bore alone said length of said outer tubular member, said outer tubular member having a proximal end attached to said working end of said hub and a distal end, said outer tubular member defining a cutting opening adjacent said distal end and sized to receive tissue therethrough, said cutting opening defining a cutting edge thereon; a cutting member slidably disposed within said central bore of said outer tubular member, said cutting member having a first operational end defining a cutting head and a second engagement end disposed proximal to said cavity of said hub; a powered hand-piece including a source of motion and an outer shell defining an outer gripping portion; a hollow hub connector having a length and a cylindrical wall with a hand-piece connection portion and a hub engagement portion, said hand-piece connection portion disposed within the hand-piece, said hub engagement portion defining a chamber for receiving said connection portion of said hub, said chamber having a longitudinal axis parallel to said length, said hub engagement portion further defining a channel through said cylindrical wall for receiving said lock member, said channel in communication with said chamber and having, a longitudinal section defined alone the length of said hub connector, a second transverse section communicating with said longitudinal section at a first end and having a second opposite end, a locking recess defined in said wall perpendicularly to said transverse section and in communication with said opposite end of said transverse section, said locking recess sized to receive said lock member, whereby said connection portion of said hub is slidable within said chamber alone said longitudinal axis when said lock member is disposed within said longitudinal section of said channel and said connection portion of said hub is rotatable within said chamber when said lock member is disposed within said transverse section of said channel and said connection portion of said hub fixed within said chamber when said lock member is disposed within said locking recess; a spring element disposed on said connection portion of said hub body, said spring element configured to urge said lock member into said locking recess when said lock member is rotated into said opposite end of said transverse section of said channel, said spring element having a squeezed position when said lock member is in said transverse section of said channel and a substantially at rest position when said lock member is in said locking recess. said spring element being a beam spring disposed at the connection end of said hub body, said beam spring including a beam having a first surface facing said connection end and a second opposite face; and a drive element disposed within said cavity and having a drive mount portion connected to said engagement end of said cutting member and a mating portion operationally connectable to the source of motion when said hub is operationally engaged to the hand-piece, said drive element translating motion from the source of motion to said cutting member to move said cutting member relative to said outer tubular member so said cutting edge of said cutting opening traverses said cutting head, said drive element including a drive connector disposed within said chamber and releasably matable to said mating portion of said drive element when said hub is engaged to said hub connector, said drive connector operatively engageable to the source of motion, said mating portion including a transverse bar disposed within said cavity of said hub and said drive connector including a bayonet element matable to said transverse bar, said bayonet element having a pair of spaced arms each terminating in a hook, said bayonet element configured to releasably receive said transverse bar when said hub is disposed within said chamber and said lock member is received within said longitudinal channel and capture said transverse bar when said hub is rotated so that the lock member of said hub is disposed within said locking recess.

Claim 5

A surgical cutting instrument, comprising: a hollow hub having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion defining a cavity and having a lock member projecting from an outer surface of said connection portion; an outer tubular member having a length sized for insertion into an anatomical space, said outer tubular member defining a central bore alone said length of said outer tubular member, said outer tubular member having a proximal end attached to said working end of said hub and a distal end, said outer tubular member defining a cutting opening adjacent said distal end and sized to receive tissue therethrough, said cutting opening defining a cutting edge thereon; a cutting member slidably disposed within said central bore of said outer tubular member, said cutting member having a first operational end defining a cutting head and a second engagement end disposed proximal to said cavity of said hub; a powered hand-piece including a source of motion and an outer shell defining an outer gripping portion; a hollow hub connector having a length and a cylindrical wall with a hand-piece connection portion and a hub engagement portion, said hand-piece connection portion disposed within the hand-piece, said hub engagement portion defining a chamber for receiving said connection portion of said hub, said chamber having a longitudinal axis parallel to said length, said hub engagement portion further defining a channel through said cylindrical wall for receiving said lock member, said channel in communication with said chamber and having, a longitudinal section defined alone the length of said hub connector, a second transverse section communicating with said longitudinal section at a first end and having a second opposite end, a locking recess defined in said wall perpendicularly to said transverse section and in communication with said opposite end of said transverse section, said locking recess sized to receive said lock member, whereby said connection portion of said hub is slidable within said chamber alone said longitudinal axis when said lock member is disposed within said longitudinal section of said channel and said connection portion of said hub is rotatable within said chamber when said lock member is disposed within said transverse section of said channel and said connection portion of said hub fixed within said chamber when said lock member is disposed within said locking recess; a spring element disposed on said connection portion of said hub body, said spring element configured to urge said lock member into said locking recess when said lock member is rotated into said opposite end of said transverse section of said channel, said spring element having a squeezed position when said lock member is in said transverse section of said channel and a substantially at rest position when said lock member is in said locking recess. said spring element being a beam spring disposed at the connection end of said hub body, said beam spring including a beam having a first surface facing said connection end and a second opposite face; and a drive element disposed within said cavity and having a drive mount portion connected to said engagement end of said cutting member and a mating portion operationally connectable to the source of motion when said hub is operationally engaged to the hand-piece, said drive element translating motion from the source of motion to said cutting member to move said cutting member relative to said outer tubular member so said cutting edge of said cutting opening traverses said cutting head, said drive element including a drive connector disposed within said chamber and releasably matable to said mating portion of said drive element when said hub is engaged to said hub connector, said drive connector operatively engageable to the source of motion, said mating portion including a transverse bar disposed within said cavity of said hub and said drive connector including a bayonet element matable to said transverse bar, said bayonet element having a pair of spaced arms each terminating in a hook, said bayonet element configured to releasably receive said transverse bar when said hub is disposed within said chamber and said lock member is received within said longitudinal channel and capture said transverse bar when said hub is rotated so that the lock member of said hub is disposed within said locking recess.

Claim 6

The instrument of claim 3 wherein said arms are spaced and parallel to form a gap having a longitudinal axis, between said hooks, for releasably receiving said bar when said bar is disposed within said gap with said length of said bar along said longitudinal axis of said gap.

Claim 7

The instrument of claim 3 wherein said drive connector defines a spring platform adjacent said bayonet element and spaced from said hooks at a spring-loaded distance for said beam spring.

Claim 8

A hub for a disposal surgical cutting assembly having an outer tubular member and an inner cutting member operationally engagable to a powered hand-piece, comprising: a hollow hub body configured to slidably receive the cutting member therethrough and configured to support the outer tubular member having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion having a lock member projecting from an outer surface thereof; a hollow hub connector having a length and a cylindrical wall with a hand-piece connection portion and a hub engagement portion, said connection portion disposable within the hand-piece, said hub engagement portion defining a chamber for receiving said connection portion of said hub body, said hub engagement portion further defining a channel through said cylindrical wall for receiving said lock member, said channel in communication with said chamber and having, a longitudinal section defined alone the length of said hub connector, a second transverse section communicating with said longitudinal section at a first end and having a second opposite end, a locking recess defined in said wall perpendicularly to said transverse section and in communication with said opposite end of said transverse section. said locking recess sized to receive said lock member, whereby said connection portion of said hub body is slidable within said chamber when said lock member is disposed within said longitudinal section of said channel and said connection portion of said hub body is rotatable within said chamber when said lock member is disposed within said transverse section of said channel and said connection portion of said hub body fixed within said chamber when said lock member is disposed within said locking recess; and a spring element disposed on said connection portion of said hub body, said spring element configured to urge said lock member into said locking recess when said lock member is rotated into said opposite end of said transverse section of said channel, said spring element having a squeezed position when said lock member is in said transverse section of said channel and a substantially at rest position when said lock member is in said locking recess, said spring element being a beam spring disposed at the connection end of said hub body, said beam spring including a beam having a first surface facing said connection end and a second opposite face.

Claim 9

A hub for a disposal surgical cutting assembly having an outer tubular member and an inner cutting member operationally engagable to a powered hand-piece, comprising: a hollow hub body configured to slidably receive the cutting member therethrough and configured to support the outer tubular member having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion having a lock member projecting from an outer surface thereof; a hollow hub connector having a length and a cylindrical wall with a hand-piece connection portion and a hub engagement portion, said connection portion disposable within the hand-piece, said hub engagement portion defining a chamber for receiving said connection portion of said hub body, said hub engagement portion further defining a channel through said cylindrical wall for receiving said lock member, said channel in communication with said chamber and having, a longitudinal section defined alone the length of said hub connector, a second transverse section communicating with said longitudinal section at a first end and having a second opposite end, a locking recess defined in said wall perpendicularly to said transverse section and in communication with said opposite end of said transverse section. said locking recess sized to receive said lock member, whereby said connection portion of said hub body is slidable within said chamber when said lock member is disposed within said longitudinal section of said channel and said connection portion of said hub body is rotatable within said chamber when said lock member is disposed within said transverse section of said channel and said connection portion of said hub body fixed within said chamber when said lock member is disposed within said locking recess; and a spring element disposed on said connection portion of said hub body, said spring element configured to urge said lock member into said locking recess when said lock member is rotated into said opposite end of said transverse section of said channel, said spring element having a squeezed position when said lock member is in said transverse section of said channel and a substantially at rest position when said lock member is in said locking recess, said spring element being a beam spring disposed at the connection end of said hub body, said beam spring including a beam having a first surface facing said connection end and a second opposite face.

Claim 10

The hub of claim 6 , wherein said spring element further comprises a boss projecting from said opposite face of said beam.

Claim 11

A disposable surgical cutting assembly for operationally engaging a powered hand-piece, comprising: a hollow hub having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion defining a cavity, said connection portion having a lock member projecting from an outer surface of said connection portion for engaging a locking groove disposed within the hand-piece; a beam spring disposed on the connection end of said hub, said beam spring including a first beam having a first surface facing said connection end and a second opposite face for acting against a spring platform disposed within the hand-piece to urge said lock member into the locking recess in the hand-piece; an outer tubular member sized for insertion into an anatomical space, said outer tubular member defining a central bore along the length of said outer tubular member, said outer tubular member having a proximal end attached to said working end of said hub and a distal end, said outer tubular member defining a cutting opening having a first cutting edge adjacent said distal end and sized to receive tissue therethrough; a cutting member slidably disposed within said central bore of said outer tubular member, said cutting member having a first operational end defining a cutting head having a second cutting edge and a second engagement end disposed within said cavity of said hub; a drive element disposed within said cavity and having a drive mount portion connected to said engagement end of said cutting member and a mating portion operationally connectable to a source of motion when said hub is operationally engaged to the hand-piece, said drive element translating motion from the source of motion to said cutting member to move said cutting member relative to said outer tubular member so said second cutting edge traverses said first cutting edge.

Claim 12

A disposable surgical cutting assembly for operationally engaging a powered hand-piece, comprising: a hollow hub having a working portion terminating at a working end and a connection portion terminating at a connection end, said connection portion defining a cavity, said connection portion having a lock member projecting from an outer surface of said connection portion for engaging a locking groove disposed within the hand-piece; a beam spring disposed on the connection end of said hub, said beam spring including a first beam having a first surface facing said connection end and a second opposite face for acting against a spring platform disposed within the hand-piece to urge said lock member into the locking recess in the hand-piece; an outer tubular member sized for insertion into an anatomical space, said outer tubular member defining a central bore along the length of said outer tubular member, said outer tubular member having a proximal end attached to said working end of said hub and a distal end, said outer tubular member defining a cutting opening having a first cutting edge adjacent said distal end and sized to receive tissue therethrough; a cutting member slidably disposed within said central bore of said outer tubular member, said cutting member having a first operational end defining a cutting head having a second cutting edge and a second engagement end disposed within said cavity of said hub; a drive element disposed within said cavity and having a drive mount portion connected to said engagement end of said cutting member and a mating portion operationally connectable to a source of motion when said hub is operationally engaged to the hand-piece, said drive element translating motion from the source of motion to said cutting member to move said cutting member relative to said outer tubular member so said second cutting edge traverses said first cutting edge.

Claim 13

The assembly of claim 8 further comprising a boss projecting from said opposite face of said first beam.

Claim 14

The assembly of claim 8 wherein said beam spring further includes a second beam disposed on said connection end of said hub spaced from said first beam, said second beam spring having a first surface facing said connection end and a second opposite face for cooperating with said first beam in acting against a spring platform disposed within the hand-piece to urge said lock member into the locking recess in the hand-piece.

Claim 15

The assembly of claim 10 further comprising a boss projecting from said opposite face of each of said first and second beams.