Patent US4295465A successfully refreshed from Google Patents.
US4295465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laryngoscope blade
Assignee: Draeger Medical Inc
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Filing: 1980-04-03
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Granted: 1981-10-20
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Expires: 2000-04-03
Abstract
Abstract A blade for a layrngoscope. The blade comprises a base portion and a projecting flange portion. The flange portion extends along part of the base portion and is pivotably mounted with respect thereto. Biasing means provide a preselected bias force on the flange portion to hold the flange portion in its projecting position. If in using the blade the flange portion contacts the patient's teeth, the flange pivots when the force applied to the teeth exceeds the predetermined bias force.
Inventors
- 👤 Gabor Racz
- 👤 Forrest Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:02
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/267
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A blade for a laryngoscope having a handle, said blade comprising a base member and a projecting flange member, and bias means, said base member being an elongated member having a rear portion, a midportion and a tip portion, said blade being secured to said handle at said rear portion said midportion being generally linear, said flange projecting upward from said base member along said rear and midportion and being pivotly mounted on said base member, said bias means providing a bias force to said blade, whereupon when said blade is inserted into a patient's mouth with flange in contact with the patient's teeth, said flange is enabled to pivot with respect to said blade against the force provided by said bias means to prevent the application of excess pressure to the teeth.
Claim 2
Dependent Claim
133 words
A blade for a laryngoscope having a handle, said blade comprising a base member and a projecting flange member, and bias means, said base member being an elongated member having a rear portion, a midportion and a tip portion, said blade being secured to said handle at said rear portion said midportion being generally linear, said flange projecting upward from said base member along said rear and midportion and being pivotly mounted on said base member, said bias means providing a bias force to said blade, whereupon when said blade is inserted into a patient's mouth with flange in contact with the patient's teeth, said flange is enabled to pivot with respect to said blade against the force provided by said bias means to prevent the application of excess pressure to the teeth.
Claim 3
Dependent Claim
26 words
The blade of claim 1 wherein said blade is generally trough shaped along its length and wherein said flange is generally trough shaped along its length.
Claim 4
Dependent Claim
11 words
The blade of claim 2 wherein said tip portion is curved.
Claim 5
Dependent Claim
13 words
The blade of claim 3 wherein said bias means comprises a resilient spring.
Claim 6
Dependent Claim
11 words
The blade of claim 3 wherein said blade includes illuminating means.
Claim 7
Dependent Claim
27 words
The blade of claim 1 wherein said flange includes a tooth engaging surface disposed at an angle slightly greater than 90° to the mid-portion of the blade.
Claim 8
Dependent Claim
26 words
The blade of claim 6 wherein said blade is generally trough shaped along its length and wherein said flange is generally trough shaped along its length.
Claim 9
Dependent Claim
11 words
The blade of claim 7 wherein said tip portion is curved.
Claim 10
Dependent Claim
13 words
The blade of claim 8 wherein said bias means comprises a resilient spring.
Claim 11
Dependent Claim
11 words
The blade of claim 9 wherein said blade includes illuminating means.
References Cited (Backward Citations)
US1510304A
Cited
US1908010A
Cited
US2070820A
Cited
US2289226A
Cited
US2648329A
Cited
US3363622A
Cited
US3507272A
Cited
US3638644A
Cited
US3771514A
Cited
US3826248A
Cited
US3856001A
Cited
US3884222A
Cited
US3986854A
Cited
US3943920A
Cited
US4114609A
Cited
US4126127A
Cited
US4112933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |