US4583972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wound evacuator
Assignee: Complex Inc
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Filing: 1984-05-18
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Granted: 1986-04-22
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Expires: 2004-05-18
Abstract
Abstract Device for producing suction in a wound consisting of two-hinged plates that spring-biased apart and contain between them a disposable bag for receiving fluid.
Inventors
- 👤 Robert R. Hunter, III
- 👤 Robert E. Weston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:47
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/60; A61M1/602; A61M1/64; A61M1/68; A61M1/684
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
Wound evacuator, comprising: (a) two relatively thin plates of generally rectangular shape, (b) a hinge joining the plates at one end edges, (c) a spring located at the hinge for subjecting the plates to movement about the hinge from a first position in which the plates lie closer together to a second position in which the plates are more separated, and (d) a bag made of flexible material lying between the plates in the portions adjacent the opposite free end edges and subjected to expansion as the plates are subjected to the said movement from the first position to the second position, the bag being provided with pockets located on opposite sides, which pockets slide snugly over the portions of the plates adjacent the said free end edges.
Claim 2
Dependent Claim
128 words
Wound evacuator, comprising: (a) two relatively thin plates of generally rectangular shape, (b) a hinge joining the plates at one end edges, (c) a spring located at the hinge for subjecting the plates to movement about the hinge from a first position in which the plates lie closer together to a second position in which the plates are more separated, and (d) a bag made of flexible material lying between the plates in the portions adjacent the opposite free end edges and subjected to expansion as the plates are subjected to the said movement from the first position to the second position, the bag being provided with pockets located on opposite sides, which pockets slide snugly over the portions of the plates adjacent the said free end edges.
Claim 3
Dependent Claim
51 words
Wound evacuator as recited in claim 1, wherein the bag is in teh general form of two opposed rectangular walls joined by two trapezoidal walls, so as to be generally wedge-shaped to conform to the shape of the space between the plates when the plates are in the said second position.
Claim 4
Dependent Claim
38 words
Wound evacuator as recited in claim 1, wherein the spring is a torsion spring that is concentric with a hinge pin lying between the plates and extending parallel to and spaced from the inner surfaces of the plates.
Claim 5
Dependent Claim
45 words
Wound evacuator as recited in claim 1, wherein the bag is formed of impermeable sheet material and has access consisting only of an inlet tube and outlet tube, the inlet tube including an anti-reflux valve, while the outlet tube is provided with a removable closure.
Claim 6
Dependent Claim
16 words
Wound evacuator as recited in claim 4, wherein the bag is formed of polyvinyl chloride sheet.
Claim 7
Dependent Claim
28 words
Wound evacuator as recited in claim 1, wherein the bag is formed of transparent material and is provided with gradation markings to indicate the amount of the contents.
References Cited (Backward Citations)
US3742952A
Cited
CA1013635A
Cited
US4187847A
Cited
US4161179A
Cited
US4429693A
Cited
US4493701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |