US4817598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracheostomy tube with ring pull removable inner cannula
Assignee: Smiths Medical ASD Inc
•
Filing: 1987-06-08
•
Granted: 1989-04-04
•
Expires: 2007-06-08
Abstract
Abstract A removable inner cannula is provided with grooved-ribbed locking member end for snap-fit interconnection inside an outer cannula. The inner cannula includes a ring-pull grasping member associated with the locking member which is easily accessible for withdrawal of the inner cannula from the outer cannula connection.
Inventors
- 👤 Denis LaBombard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0488; A61M16/0497; A61M16/0402; A61M16/0427; A61M16/0465
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A removable cannula system comprising: an outer cannula having a first and second end; an inner cannula having a first and second end, said inner cannula being interconnectable inside said outer cannula at said second ends; first locking means disposed inside said outer cannula at said second end and second locking means disposed at said second end of said inner cannula for interconnecting said inner cannula inside said outer cannula; and, grasping means for facilitating withdrawal of said inner cannula from said outer cannula, said grasping means including an annular ring with a hinge means connecting said annular ring to said inner cannula, said annular ring being alignable with an opening of said outer cannula at said second end and easily accessible to the fingers to be unfolded for pulling said inner cannula from said outer cannula.
Claim 2
Dependent Claim
137 words
A removable cannula system comprising: an outer cannula having a first and second end; an inner cannula having a first and second end, said inner cannula being interconnectable inside said outer cannula at said second ends; first locking means disposed inside said outer cannula at said second end and second locking means disposed at said second end of said inner cannula for interconnecting said inner cannula inside said outer cannula; and, grasping means for facilitating withdrawal of said inner cannula from said outer cannula, said grasping means including an annular ring with a hinge means connecting said annular ring to said inner cannula, said annular ring being alignable with an opening of said outer cannula at said second end and easily accessible to the fingers to be unfolded for pulling said inner cannula from said outer cannula.
Claim 3
Dependent Claim
65 words
A removable cannula system according to claim 1 wherein said second locking means includes a plurality of ribbed-grooved members on said inner cannula and said first locking means includes at least a pair of corresponding ribs forming a groove therebetween on an inner wall of said outer cannula adapted for snap-fit interconnection with at least one of said ribbed-grooved members of said second locking means.
Claim 4
Dependent Claim
21 words
A removable inner cannula according to claim 2 wherein said hinge means connects said annular ring to said second locking means.
Claim 5
Dependent Claim
153 words
A tracheostomy tube comprising: an outer cannula having a first and second end; a tubular connector member integral with said outer cannula at said second end; a removable inner cannula removably disposed inside said outer cannula, said inner cannula having a first and second end, said inner cannula being interlockable inside said connector member at said second end; first locking means disposed inside said tubular connector member and second locking means disposed at said second end of said inner cannula for interconnecting said inner cannula inside said connector member; and grasping means for facilitating withdrawal of said inner cannula from said outer cannula, said grasping means including an annular ring with a hinge means connecting said annular ring to said inner cannula, said annular ring being alignable with an opening of said tubular connector member and easily accessible to the fingers to be unfolded for pulling said inner cannula from said outer cannula.
Claim 6
Dependent Claim
153 words
A tracheostomy tube comprising: an outer cannula having a first and second end; a tubular connector member integral with said outer cannula at said second end; a removable inner cannula removably disposed inside said outer cannula, said inner cannula having a first and second end, said inner cannula being interlockable inside said connector member at said second end; first locking means disposed inside said tubular connector member and second locking means disposed at said second end of said inner cannula for interconnecting said inner cannula inside said connector member; and grasping means for facilitating withdrawal of said inner cannula from said outer cannula, said grasping means including an annular ring with a hinge means connecting said annular ring to said inner cannula, said annular ring being alignable with an opening of said tubular connector member and easily accessible to the fingers to be unfolded for pulling said inner cannula from said outer cannula.
Claim 7
Dependent Claim
65 words
A tracheostomy tube according to claim 4 wherein said second locking means includes a plurality of ribbed-grooved members on said inner cannula tube and said first locking means includes at least a pair of corresponding ribs forming a groove therebetween on an inner wall of said outer cannula adapted for snap-fit interconnection with at least one of said ribbed-grooved members of said second locking means.
Claim 8
Dependent Claim
26 words
A tracheostomy tube according to claim 5 wherein a diameter of said annular ring substantially corresponds to the diameter of the ribs of said locking means.
Claim 9
Dependent Claim
27 words
A tracheostomy tube according to claim 2 wherein a diameter of said annular ring substantially corresponds to the diameter of the ribs of said second locking means.
References Cited (Backward Citations)
GB125754A
Cited
US2765792A
Cited
US3088466A
Cited
US3263684A
Cited
US3169529A
Cited
US3334631A
Cited
US3587589A
Cited
US3688774A
Cited
US3659612A
Cited
US3731692A
Cited
US4045058A
Cited
US3889688A
Cited
US3948273A
Cited
US3987798A
Cited
US3973569A
Cited
US4009720A
Cited
US4033353A
Cited
US4235229A
Cited
US4315505A
Cited
US4471776A
Cited
US4593690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |