Patent US4718151A successfully refreshed from Google Patents.
US4718151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractor apparatus
Assignee: Minnesota Scientific Inc
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Filing: 1986-06-02
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Granted: 1988-01-12
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Expires: 2006-06-02
Abstract
Abstract A retractor apparatus for attachment to a rail of a surgical table includes first, second and third support rods and first, second and third clamps. The first support rod is attached to the rail of the surgical table and permits movement about and along a vertical axis of the first rod. The second rod is attached to an upper section of the first rod with the second clamp. The second clamp permits movement of the second support rod about an axis of the first rod and about an axis of the second support rod and permits pivotal movement of the second rod with respect to the first rod about a pivotal axis of the second clamp. The third clamp clamps the third rod to the second rod and permits movement of the third rod along and about the axis of the second rod and about the axis of the third rod and permits movement about a pivotal axis of the third clamp. The third rod includes first and second spaced apart leg portions that extend over the surgical table on opposite sides proximate the incision for support of retractors.
Inventors
- 👤 Bruce A. LeVahn
- 👤 Robert E. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02; A61B90/00; A61B90/50; Y; Y10; Y10S; Y10S248/00; Y10S248/904; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44684; Y10T24/44744
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
271 words
A clamping mechanism for connecting first and second rod sections of a retractor apparatus, the mechanism comprising: a first clamping section having a unitary body with a first clamping bore extending therethrough proximate one end of the body and a slot running through said body from the clamping bore to an opposite end of the body, separating the body into first and second resilient leg portions that when brought together reduce the diameter of the first clamping bore for frictionally clamping a rod section, the first clamping section further including a frusto-conical section extending from the first leg portion; a second clamping section having a unitary body with a second clamping bore extending therethrough proximate one end of the body and a slot running through said body from the clamping bore to an opposite end of the body, separating the body into first and second resilient leg portions that when moved together reduce the diameter of the second clamping bore for frictionally clamping a rod section, the second leg portion having a frusto-conical recess for frictional engagement with the frusto-conical section of the first clamping section such that when a force is applied bringing the first and second clamping sections together and the leg portions of the respective clamping sections together, each clamping bore frictionally clamps the respective rod section and the frusto-conical recess and frusto-conical section are placed in frictional engagement so that the first and second clamping sections are placed in a clamped position; and means for providing a force to bring together the leg portions of the respective clamping section and the first and second clamping sections together.
Claim 2
Dependent Claim
271 words
A clamping mechanism for connecting first and second rod sections of a retractor apparatus, the mechanism comprising: a first clamping section having a unitary body with a first clamping bore extending therethrough proximate one end of the body and a slot running through said body from the clamping bore to an opposite end of the body, separating the body into first and second resilient leg portions that when brought together reduce the diameter of the first clamping bore for frictionally clamping a rod section, the first clamping section further including a frusto-conical section extending from the first leg portion; a second clamping section having a unitary body with a second clamping bore extending therethrough proximate one end of the body and a slot running through said body from the clamping bore to an opposite end of the body, separating the body into first and second resilient leg portions that when moved together reduce the diameter of the second clamping bore for frictionally clamping a rod section, the second leg portion having a frusto-conical recess for frictional engagement with the frusto-conical section of the first clamping section such that when a force is applied bringing the first and second clamping sections together and the leg portions of the respective clamping sections together, each clamping bore frictionally clamps the respective rod section and the frusto-conical recess and frusto-conical section are placed in frictional engagement so that the first and second clamping sections are placed in a clamped position; and means for providing a force to bring together the leg portions of the respective clamping section and the first and second clamping sections together.
Claim 3
Dependent Claim
76 words
The clamping mechanism of claim 1 wherein the first and second clamping sections have first and second pivot bores coaxially aligned with respect to a pivot axis running through the clamping sections and wherein the means for providing a force includes a turning bolt extending through the pivot bores and threadably engaging the second leg portion of the first clamping section to provide a force to bring the leg portions together when the bolt is turned.
Claim 4
Dependent Claim
91 words
The clamping mechanism of claim 2 wherein the turning bolt includes a head section having first and second spaced-apart handle retaining members, each handle retaining member having first and second pin receiving apertures positioned along a pin pivot axis and further including a handle having a section positionable between the first and second retaining members and having a third pin receiving aperture alignable with the first and second pin receiving apertures and a pivot pin insertably engaging the first, second and third apertures, such that the handle is pivotal approximately 180°.
Claim 5
Dependent Claim
186 words
A retractor clamping apparatus comprising: a first clamping member with a first clamping groove; a second clamping member having a second clamping groove facing the first clamping groove such that the first and second clamping grooves define a first clamping bore which frictionally engages a support rod disposed within the clamping bore when the first and second clamping members are brought together in a clamping relationship; a support rod clamping section having a unitary body with a second clamping bore extending therethrough proximate one end of the body and a slot running through the body from the clamping bore to an opposite end of the body, separating the body into first and second resilient leg portions that when brought together reduce a diameter of the clamping bore for frictionally clamping a support rod; spring means for providing a force to separate the first and second clamping members from a clamping position; and means for providing a force to bring together the first and second clamping members to a clamping position and to bring together the leg portions of the rod clamping section to a clamping position.
Claim 6
Dependent Claim
186 words
A retractor clamping apparatus comprising: a first clamping member with a first clamping groove; a second clamping member having a second clamping groove facing the first clamping groove such that the first and second clamping grooves define a first clamping bore which frictionally engages a support rod disposed within the clamping bore when the first and second clamping members are brought together in a clamping relationship; a support rod clamping section having a unitary body with a second clamping bore extending therethrough proximate one end of the body and a slot running through the body from the clamping bore to an opposite end of the body, separating the body into first and second resilient leg portions that when brought together reduce a diameter of the clamping bore for frictionally clamping a support rod; spring means for providing a force to separate the first and second clamping members from a clamping position; and means for providing a force to bring together the first and second clamping members to a clamping position and to bring together the leg portions of the rod clamping section to a clamping position.
Claim 7
Dependent Claim
118 words
The apparatus of claim 4 wherein the support rod clamping section has a pivot bore extending through the leg portions and the first and second clamping member having pivot bores extending therethrough and the means for providing a force includes a turning bolt extending through the pivot bores of the first and second clamping members and the support rod clamping section and a bolt engaging head member having a threaded bore for threadably engaging the bolt such that when the bolt is turned to move through the threaded bore, a force is provided to bring the first and second clamping members and the first and second leg portions of the retractor clamping apparatus together in a clamping position.
Claim 8
Dependent Claim
86 words
The apparatus of claim 5 wherein the head member includes first and second spaced-apart handle retaining members, each handle retaining member having first and second pin receiving apertures positioned along a pin pivot axis and further including a handle having a section positionable between the first and second retaining members and having a third pin receiving aperture alignable with the first and second pin receiving apertures and a pivot pin insertably engaging the first, second and third apertures such that the handle is pivotal approximately 180°.
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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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |