Patent US4800878A successfully refreshed from Google Patents.
US4800878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrosurgical knife with visual alarm
Assignee: Becton Dickinson and Co
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Filing: 1987-08-26
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Granted: 1989-01-31
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Expires: 2007-08-26
Abstract
Abstract A disposable electrosurgical knife handle and blade is provided with a built-in warning light positioned on the top of the handle in the surgeon's line of vision during surgical procedures in order to warn, instantly, of unwanted surges in the electrical system which could bring about tissue damage. Because of the arrangement, the surgeon may remove immediately the blade or other cutting instrument fitted into the handle from the surgical site.
Inventors
- 👤 Robert L. Cartmell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B17/00; A61B2017/00017; A61B2017/00115; A61B2017/00119; Y; Y10; Y10S; Y10S128/00; Y10S128/908
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
An electrosurgical handle apparatus, comprising (a) a handle body; (b) connector means at one end of said body for connection to a power source; (c) an active tip at the end of said handle body opposite said connector means for receiving a cutting instrument; (d) electronic flow communication means in said handle body, said electronic flow communication means extending through said handle body for carrying current between said active tip and said connector means; the improvement characterized by (e) a current responsive lamp in said electronic flow communication means; (f) a resistor in said electronic flow communication means; and (g) said lamp and said resistor being connected in parallel.
Claim 2
Dependent Claim
109 words
An electrosurgical handle apparatus, comprising (a) a handle body; (b) connector means at one end of said body for connection to a power source; (c) an active tip at the end of said handle body opposite said connector means for receiving a cutting instrument; (d) electronic flow communication means in said handle body, said electronic flow communication means extending through said handle body for carrying current between said active tip and said connector means; the improvement characterized by (e) a current responsive lamp in said electronic flow communication means; (f) a resistor in said electronic flow communication means; and (g) said lamp and said resistor being connected in parallel.
Claim 3
Dependent Claim
35 words
Apparatus according to claim 1, further characterized by (a) said active tip includes a chuck; (b) an electrosurgical blade frictionally received in said chuck; and (c) said blade forming the positive electrode of said handle.
Claim 4
Dependent Claim
29 words
Apparatus according to claim 1, further characterized by (a) a connecting pin in said connector means; and (b) an elongated cable connected at one end thereof to said pin.
Claim 5
Dependent Claim
47 words
Apparatus according to claim 1, further characterized by (a) said active tip includes a socket; and (b) a member selected from the group consisting of a needle, a blade or a ball received in said socket; and (c) said member forming the positive electrode of said handle.
Claim 6
Independent Claim
149 words
A system for monitoring the electronic circuit connected to an electrosurgical device for unwanted variations in current during surgical procedures comprising; (a) a throw-away electrosurgical handle body; (b) a generator; (c) a connector pin at one end of said handle body; (d) an electric cable with one end connected to said generator and one end connected to said connector pin; (e) an active electronic chuck at the end of said handle body opposite said connector pin; (f) electronic flow communication means in said handle body, said electronic flow communication means extending through said handle body for carrying current between said electronic chuck and said connector pin; (g) a dispersive electrode connected to said generator; the improvement characterized by (h) a current responsive lamp in said electronic flow communication means; (i) a resistor in said electronic flow communication means; and (j) said lamp and said resistor being connected in parallel.
Claim 7
Independent Claim
149 words
A system for monitoring the electronic circuit connected to an electrosurgical device for unwanted variations in current during surgical procedures comprising; (a) a throw-away electrosurgical handle body; (b) a generator; (c) a connector pin at one end of said handle body; (d) an electric cable with one end connected to said generator and one end connected to said connector pin; (e) an active electronic chuck at the end of said handle body opposite said connector pin; (f) electronic flow communication means in said handle body, said electronic flow communication means extending through said handle body for carrying current between said electronic chuck and said connector pin; (g) a dispersive electrode connected to said generator; the improvement characterized by (h) a current responsive lamp in said electronic flow communication means; (i) a resistor in said electronic flow communication means; and (j) said lamp and said resistor being connected in parallel.
Claim 8
Dependent Claim
39 words
the system of claim 5, further characterized by (a) a member selected from the group consisting of a blade, a pin or a ball received in said electronic chuck; and said member forming the positive electrode of said system.
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |