US3867943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical drill with detachable hand-piece
Assignee: Edward Weck & Company Inc
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Filing: 1972-09-13
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Granted: 1975-02-25
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Expires: 1992-09-13
Abstract
Abstract A drive housing has a drive shaft with a drive clutch extending therefrom. A detachable hand-piece includes a driven shaft and a claw attached thereto which is adapted to operatively mate with the drive clutch. The operative engagement is effective to drive a cutting element connectable to the driven shaft. The operative engagement can be effected while the drive motor is operating.
Inventors
- 👤 Harald Nordin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1613; A61B17/1622; Y; Y10; Y10T; Y10T403/00; Y10T403/16; Y10T403/1616; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6771; Y10T408/94
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
In a surgical drill of the type comprising: a. a drive housing; b. drive means including a drive shaft in said housing; c. a detachable hand-piece comprising a housing, a driven shaft rotatably mounted in said housing, and a cutting element connectable to said driven shaft; and, d. means to exchangeably and operatively couple the drive and driven shafts; e. the improvement which comprises a clutch member attached to said drive shaft, said clutch member being generally cylindrical, having notches thereon and having a central guide member protruding outwardly therefrom; and f. a claw member attached to said driven shaft having cooperating arm members extending therefrom toward said clutch member, said arm members adapted to fit into said notches, said claw member having a central guide bore to receive said guide member, said claw and clutch member adapted to mate in operative driving relation when said hand-piece housing is connected to said drive housing while the drive shaft is rotating.
Claim 2
Dependent Claim
160 words
In a surgical drill of the type comprising: a. a drive housing; b. drive means including a drive shaft in said housing; c. a detachable hand-piece comprising a housing, a driven shaft rotatably mounted in said housing, and a cutting element connectable to said driven shaft; and, d. means to exchangeably and operatively couple the drive and driven shafts; e. the improvement which comprises a clutch member attached to said drive shaft, said clutch member being generally cylindrical, having notches thereon and having a central guide member protruding outwardly therefrom; and f. a claw member attached to said driven shaft having cooperating arm members extending therefrom toward said clutch member, said arm members adapted to fit into said notches, said claw member having a central guide bore to receive said guide member, said claw and clutch member adapted to mate in operative driving relation when said hand-piece housing is connected to said drive housing while the drive shaft is rotating.
Claim 3
Dependent Claim
18 words
The surgical drill of claim 1 including means to releasably engage said drive housing to said hand-piece housing.
Claim 4
Dependent Claim
23 words
The surgical drill of claim 1 further comprising a bearing arrangement within said hand-piece housing to secure accurate centration of the cutting element.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |