US5507749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device for the medullary cavity
Assignee: Individual
•
Filing: 1994-06-13
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Granted: 1996-04-16
•
Expires: 2014-06-13
Abstract
Abstract The invention relates to a device for sealing the medullary cavity of a bone during the application of bone cement. The device comprises an elastic bottom portion (10) for positive contact with the bone around the medullary cavity and a rigid top portion (30). When the bone cement cartridge (40) is pushed down, the rigid top portion (30) presses the bottom portion (10) against the bone, and the medullary cavity is sealed in a vacuum-tight manner. The device according to the invention makes it easier to fill the medullary cavity with bone cement under vacuum and to carry out drainage at the same time. (FIG. 1).
Inventors
- 👤 Klaus Draenert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:07
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8805; A61B17/8808; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30723; A61F2/30728; A61F2/32; A61F2/36; A61F2/3609
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
171 words
A device for sealing a medullary cavity of a bone during the vacuum-application of bone cement, comprising: an elastic bottom portion having means thereon for removably contacting the bone and providing a partial vacuum seal around the medullary cavity during the vacuum-application of bone cement and for releasing the bottom portion from the bone after the application of the bone cement, the bottom portion having an opening therethrough for applying bone cement to the medullary cavity, and the bottom portion having a section curved upwardly in a direction away from the medullary cavity when positioned thereon such that pressing the curved section seals the bottom portion to the bone; and a rigid top portion fixedly attached to the curved section for pressing the elastic bottom portion against the bone, the top portion having an opening therethrough in communication with the opening of the bottom portion for applying the bone cement; wherein the top portion and the bottom portion are removable from the medullary cavity after the application of the bone cement.
Claim 2
Independent Claim
171 words
A device for sealing a medullary cavity of a bone during the vacuum-application of bone cement, comprising: an elastic bottom portion having means thereon for removably contacting the bone and providing a partial vacuum seal around the medullary cavity during the vacuum-application of bone cement and for releasing the bottom portion from the bone after the application of the bone cement, the bottom portion having an opening therethrough for applying bone cement to the medullary cavity, and the bottom portion having a section curved upwardly in a direction away from the medullary cavity when positioned thereon such that pressing the curved section seals the bottom portion to the bone; and a rigid top portion fixedly attached to the curved section for pressing the elastic bottom portion against the bone, the top portion having an opening therethrough in communication with the opening of the bottom portion for applying the bone cement; wherein the top portion and the bottom portion are removable from the medullary cavity after the application of the bone cement.
Claim 3
Dependent Claim
29 words
The device according to claim 1, wherein the bottom portion and the top portion each have a shape selected from the group consisting of hollow-cylindrical, annular, semicircular or ellipsoidal.
Claim 4
Dependent Claim
32 words
The device according to claim 1, wherein a lower surface of the bottom portion is adapted to the shape of a resection plane of the bone to be pressed against the bone.
Claim 5
Dependent Claim
24 words
The device according to claim 1, wherein at least part of the bottom portion has the shape of a packing ring or a bead.
Claim 6
Dependent Claim
24 words
The device according to claim 1, wherein the bottom portion and the top portion are in contact with one another over a curved area.
Claim 7
Dependent Claim
30 words
The device according to claim 1, wherein an interior of an underside of the bottom portion comprises a recess whose surface is larger than an opening of the medullary cavity.
Claim 8
Dependent Claim
19 words
The device according to claim 1, having means to prevent twisting between the bottom portion and the top portion.
Claim 9
Dependent Claim
17 words
The device according to claim 1, wherein the bottom portion and the top portion are firmly connectable.
Claim 10
Dependent Claim
15 words
The device according to claim 1, wherein the bottom portion is made of silicone rubber.
Claim 11
Dependent Claim
17 words
The device according to claim 1, wherein the top portion is made of a sterilisable plastic material.
Claim 12
Dependent Claim
33 words
The device according to claim 2, wherein an interior of the bottom portion has a bearing surface for positively receiving a tip of a container out of which the bone cement is applied.
Claim 13
Dependent Claim
32 words
The device according to claim 2, wherein a interior of the top portion has a bearing surface for positively receiving a tip of a container out which the bone cement is applied.
Claim 14
Dependent Claim
27 words
The device according to claim 1, wherein the top portion is curved upwardly is a shell-like shape and positioned against the curved section of the bottom portion.
Claim 15
Dependent Claim
20 words
The device according to claim 1, wherein the bottom and top portions comprise a common opening for applying bone cement.
Claim 16
Dependent Claim
15 words
The device according to claim 14, wherein the common opening is at least partially conical.
Claim 17
Dependent Claim
19 words
The device according to claim 1, wherein the bottom portion is the most distal part of the sealing device.
Claim 18
Dependent Claim
14 words
The device according to claim 1, wherein the top portion is made of metal.
Claim 19
Dependent Claim
14 words
The device according to claim 1, wherein the top portion is made of TPX.
Claim 20
Dependent Claim
17 words
The device according to claim 1, wherein the bottom portion provides a vacuum-tight contact with the bone.
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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) | 1999-04-16 | 1999-10-16 | 2000-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-16 | 2003-10-16 | 2004-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-16 | 2007-10-16 | 2008-04-16 | $7700.00 | Window Closed / Lapsed |