US5163944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obstetrical vacuum extractor
Assignee: CooperSurgical Inc
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Filing: 1991-08-09
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Granted: 1992-11-17
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Expires: 2011-08-09
Abstract
Abstract There is disclosed herein a vacuum extractor for use in childbirth and comprising a bell shaped cup having a relatively thin outer flared edge, a hollow stem extending from the cup, and the stem including a handle. A vacuum source can be connected to the stem to draw a vacuum within the cup. A liner is hooked over the flared edge of the cup and provides a relatively large soft and resilient bead for the outer edge of the vacuum extractor which contacts maternal and fetal tissue. The liner is stretched into and secured within the cup and includes an aperture for allowing a vacuum to be drawn within the cup.
Inventors
- 👤 Theodore C. Neward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:45
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/42; A61B17/44; A61B17/442; A61B17/30; A61B2017/306; A61B2017/308
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell having a relatively thin outer flared edge and a thicker body portion and a base section connected with a hollow stem, the stem having an open end for connection to a vacuum source, the stem including a handle for facilitating manipulation of the vacuum extractor, and a flexible liner having an outer bead engaged with and extending over the outer flared edge of the cup, and the liner extending into the cup and having a base section secured to the base section of the cup.
Claim 2
Dependent Claim
100 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell having a relatively thin outer flared edge and a thicker body portion and a base section connected with a hollow stem, the stem having an open end for connection to a vacuum source, the stem including a handle for facilitating manipulation of the vacuum extractor, and a flexible liner having an outer bead engaged with and extending over the outer flared edge of the cup, and the liner extending into the cup and having a base section secured to the base section of the cup.
Claim 3
Dependent Claim
35 words
A vacuum extractor as in claim 1 wherein the liner is formed of a rubber or rubber like material having a wall thickness of approximately 0.03 inch and base section thickness of approximately 0.05 inch.
Claim 4
Dependent Claim
175 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell, the vacuum cup having a body section with a relatively thin outwardly flared edge at an open end of the cup an having a base section opposite the open end, an elongated stem extending from the base section of the cup, the stem being hollow with an opening therethrough communicating with the inside of the cup and a distal end of the stem for connection to a vacuum source, and the stem including a handle for facilitating manipulation of the vacuum extractor, and the cup, stem and handle being molded as a unitary unit from plastic, the improvement comprising a flexible liner disposed within the cup, the flexible liner having an outer bead extending over and hooked with the outer flared edge of the cup, the liner extending into the inside of the cup to the base section and being secured to the base section of the cup by a rigid disk secured to the base section of the cup.
Claim 5
Dependent Claim
175 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell, the vacuum cup having a body section with a relatively thin outwardly flared edge at an open end of the cup an having a base section opposite the open end, an elongated stem extending from the base section of the cup, the stem being hollow with an opening therethrough communicating with the inside of the cup and a distal end of the stem for connection to a vacuum source, and the stem including a handle for facilitating manipulation of the vacuum extractor, and the cup, stem and handle being molded as a unitary unit from plastic, the improvement comprising a flexible liner disposed within the cup, the flexible liner having an outer bead extending over and hooked with the outer flared edge of the cup, the liner extending into the inside of the cup to the base section and being secured to the base section of the cup by a rigid disk secured to the base section of the cup.
Claim 6
Dependent Claim
34 words
A vacuum extractor as in claim 3 wherein the liner is formed of rubber or rubber like material, and the rigid disk is secured to pegs extending from the base section of the cup.
Claim 7
Dependent Claim
123 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell having a relatively thin outer flared edge and a thicker body portion and a base section connected with a hollow stem, the stem having an open end for connection to a vacuum source, the stem including a handle for facilitating manipulation of the vacuum extractor, and a flexible liner having an outer bead engaged with and extending over the outer flared edge of the cup, and the liner extending into the cup and having a base section secured to the base section of the cup, the liner being secured within the cup by a rigid circular disk secured to pegs extending from the base section of the cup.
Claim 8
Dependent Claim
123 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell having a relatively thin outer flared edge and a thicker body portion and a base section connected with a hollow stem, the stem having an open end for connection to a vacuum source, the stem including a handle for facilitating manipulation of the vacuum extractor, and a flexible liner having an outer bead engaged with and extending over the outer flared edge of the cup, and the liner extending into the cup and having a base section secured to the base section of the cup, the liner being secured within the cup by a rigid circular disk secured to pegs extending from the base section of the cup.
Claim 9
Dependent Claim
113 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell having a relatively thin and flexible outer flared edge and a thicker body portion extending to a base section, the base section being connected with a hollow stem, the stem having an open end for connection to a vacuum source, the extractor including a handle for facilitating manipulation of the vacuum extractor, and a flexible liner on and within the cup, the liner having an outer bead covering engaged with and extending out over the outer flared edge of the cup, and the liner extending into the cup and being bonded to the base section of the cup.
Claim 10
Dependent Claim
113 words
An obstetrical vacuum extractor comprising a vacuum cup substantially in the shape of a bell having a relatively thin and flexible outer flared edge and a thicker body portion extending to a base section, the base section being connected with a hollow stem, the stem having an open end for connection to a vacuum source, the extractor including a handle for facilitating manipulation of the vacuum extractor, and a flexible liner on and within the cup, the liner having an outer bead covering engaged with and extending out over the outer flared edge of the cup, and the liner extending into the cup and being bonded to the base section of the cup.
Claim 11
Dependent Claim
28 words
The vacuum extractor as in claim 6 wherein the liner is bonded within the cup by a rigid circular disk secured to the base section of the cup.
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |