US3719186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical instrument for placement of bone pins and holes therefor
Assignee: UAB RESEARCH FOUNDATION NON-PROFIT CORP
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Filing: 1971-04-22
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Granted: 1973-03-06
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Expires: 1991-04-22
Abstract
Abstract A surgical instrument for placement of bone pins and holes therefor having an outer cannula telescopically receiving an inner cannula which in turn telescopically receives a stylus. The outer cannula has symmetrically separable components and one end thereof engages a bone in which a hole is drilled. A tool is detachably connected to the outer cannula for retaining the outer cannula assembly. An inner cannula terminates inwardly of said one end of the outer cannula and a stylus extends to a point adjacent said one end of the outer cannula.
Inventors
- 👤 J Merig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1644; A61B2017/1651; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021; A61B2217/00; A61B2217/002; A61B2217/005; A61B2217/007; Y; Y10; Y10S; Y10S606/00; Y10S606/916
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
147 words
A surgical instrument for use in the placement of bone pins and drilled holes therefor; a. an outer cannula having separable components with one end of said outer cannulA being adapted to be maintained in engagement with a bone in which a hole is to be drilled, b. a tool engagable with said separable components of said outer cannula holding said components together in assembled position while said tool is in one position relative to said components and releasing said components upon movement of said tool to another position, c. an inner cannula telescoping into said outer cannula with one end of said inner cannula terminating inwardly of said one end of said outer cannula, and d. a stylus telescoping into said inner cannula and extending to a point adjacent said one end of said outer cannula restraining the entrapment of soft tissue in said outer cannula.
Claim 2
Dependent Claim
147 words
A surgical instrument for use in the placement of bone pins and drilled holes therefor; a. an outer cannula having separable components with one end of said outer cannulA being adapted to be maintained in engagement with a bone in which a hole is to be drilled, b. a tool engagable with said separable components of said outer cannula holding said components together in assembled position while said tool is in one position relative to said components and releasing said components upon movement of said tool to another position, c. an inner cannula telescoping into said outer cannula with one end of said inner cannula terminating inwardly of said one end of said outer cannula, and d. a stylus telescoping into said inner cannula and extending to a point adjacent said one end of said outer cannula restraining the entrapment of soft tissue in said outer cannula.
Claim 3
Dependent Claim
147 words
A surgical instrument for use in the placement of bone pins and drilled holes therefor; a. an outer cannula having separable components with one end of said outer cannulA being adapted to be maintained in engagement with a bone in which a hole is to be drilled, b. a tool engagable with said separable components of said outer cannula holding said components together in assembled position while said tool is in one position relative to said components and releasing said components upon movement of said tool to another position, c. an inner cannula telescoping into said outer cannula with one end of said inner cannula terminating inwardly of said one end of said outer cannula, and d. a stylus telescoping into said inner cannula and extending to a point adjacent said one end of said outer cannula restraining the entrapment of soft tissue in said outer cannula.
Claim 4
Dependent Claim
147 words
A surgical instrument for use in the placement of bone pins and drilled holes therefor; a. an outer cannula having separable components with one end of said outer cannulA being adapted to be maintained in engagement with a bone in which a hole is to be drilled, b. a tool engagable with said separable components of said outer cannula holding said components together in assembled position while said tool is in one position relative to said components and releasing said components upon movement of said tool to another position, c. an inner cannula telescoping into said outer cannula with one end of said inner cannula terminating inwardly of said one end of said outer cannula, and d. a stylus telescoping into said inner cannula and extending to a point adjacent said one end of said outer cannula restraining the entrapment of soft tissue in said outer cannula.
Claim 5
Dependent Claim
19 words
A surgical instrument as defined in claim 1 in which said one end of said outer cannula is serrated.
Claim 6
Dependent Claim
25 words
A surgical instrument as defined in claim 1 in which the end of said stylus adjacent said one end of said outer cannula is tapered.
Claim 7
Dependent Claim
40 words
A surgical instrument as defined in claim 1 in which the end of said outer cannula opposite said one end is enlarged and said inner cannula has an enlarged end portion fitting said one enlarged end of said outer cannula.
Claim 8
Dependent Claim
36 words
A surgical instrument as defined in claim 4 in which said enlarged end portions of said outer and inner cannulae are concentric, cylindrical members which communicate with reduced diameter, concentric, cylindrical portions, respectively, of said cannulae.
Claim 9
Dependent Claim
34 words
A surgical instrument as defined in claim 5 in which said stylus is provided with an outer surface which corresponds to and slidably engages a portion of the inner surface of said inner cannula.
Claim 10
Dependent Claim
39 words
A surgical instrument as defined in claim 6 in which said enlarged end portion of said inner cannula extends axially outwardly of said outer cannula and the adjacent end of said stylus extends axially outwardly of said inner cannula.
Claim 11
Dependent Claim
61 words
A surgical instrument as defined in claim 1 in which said outer cannula is divided longitudinally into separate, matching sections with outwardly opening locking grooves in said sections and said tool is provided with contact surfaces along the edges of an outwardly opening recess therein which engage said locking grooves with a sliding fit to retain said sections in assembled position.
Claim 12
Dependent Claim
50 words
A surgical instrument as defined in claim 8 in which each locking groove is provided with an inner surface which flares outwardly toward said one end of said outer cannula and said contact surfaces on said tool correspond to and slidably engage the adjacent inner surfaces of said locking groove.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |