US4610243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Malleable force-fulcrum retractor
Assignee: Surgical Dynamics Inc
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Filing: 1985-05-06
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Granted: 1986-09-09
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Expires: 2005-05-06
Abstract
Abstract A Taylor-type force-fulcrum retractor has a broad malleable band which is readily shaped by hand to fit any situation and yet holds that shape against forces that may be applied to pull the muscles away from the center of an incision. The force-fulcrum retractor is particularly useful in spinal surgery and may have a claw-like spike or spikes which penetrate the surface of a bone within the incision to establish an extraordinarily secure fulcrum.
Inventors
- 👤 Charles D. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:53
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
79 words
Force-fulcrum retractor comprising a broad band having at one end at least one point to establish a fulcrum within a surgical incision, wherein the improvement comprises: the material of the band is sufficiently malleable so that the band can readily be bent by hand to a desired shape while being sufficiently stiff to hold that shape against a retractile force applied to the other end of the band to pull the muscles away from the center of the incision.
Claim 2
Dependent Claim
79 words
Force-fulcrum retractor comprising a broad band having at one end at least one point to establish a fulcrum within a surgical incision, wherein the improvement comprises: the material of the band is sufficiently malleable so that the band can readily be bent by hand to a desired shape while being sufficiently stiff to hold that shape against a retractile force applied to the other end of the band to pull the muscles away from the center of the incision.
Claim 3
Dependent Claim
24 words
Force-fulcrum retractor as defined in claim 1 wherein said fulcrum point is at least one tooth formed in said one end of the band.
Claim 4
Dependent Claim
16 words
Force-fulcrum retractor as defined in claim 2 wherein said fulcrum point is a pair of teeth.
Claim 5
Dependent Claim
25 words
Force-fulcrum retractor as defined in claim 1 wherein said point is a rigid spike fixed to and projecting beyond said one end of the band.
Claim 6
Dependent Claim
45 words
Force-fulcrum retractor as defined in claim 4 wherein the spike has a circular cross section and is in the form of a claw which is is gently curved so that its point extends at an acute angle with the said one end of the band.
Claim 7
Dependent Claim
21 words
Force-fulcrum retractor as defined in claim 5 wherein each spike is formed with a flat which is fixed to the band.
Claim 8
Dependent Claim
22 words
Force-fulcrum retractor as defined in claim 6 wherein each spike projects from 0.5 to 1.25 cm beyond the end of the band.
Claim 9
Dependent Claim
35 words
Force-fulcrum retractor as defined in claim 7 wherein each spike has a diameter of at least 2 mm except at the apex and projects from 0.5 to 1.25 cm beyond the end of the band.
Claim 10
Dependent Claim
11 words
Force-fulcrum retractor as defined in claim 5 having a single spike.
Claim 11
Dependent Claim
12 words
Force-fulcrum retractor as defined in claim 5 having a pair of spikes.
Claim 12
Dependent Claim
17 words
Force-fulcrum retractor as defined in claim 1 wherein the material of said band is soft stainless steel.
Claim 13
Dependent Claim
17 words
Force-fulcrum retractor as defined in claim 11 wherein the thickness of the band is approximately 1 mm.
Claim 14
Dependent Claim
53 words
Force-fulcrum retractor as defined in claim 1 wherein the material of the band is selected so that when the retractor is bent to a curved shape and its fulcrum point is inserted into an incision, a weight of 2 kg suspended from the free end of the retractor does not change its shape.
Claim 15
Dependent Claim
71 words
Force-fulcrum retractor comprising a broad band having at one end at least one point to establish a fulcrum within a surgical incision, wherein the improvement comprises: said point is a rigid spike fixed to and projecting beyond said one end of the band, and the spike has a diameter of at least 2 mm except at the apex and extends not more than 1.25 cm beyond the end of the band.
Claim 16
Dependent Claim
71 words
Force-fulcrum retractor comprising a broad band having at one end at least one point to establish a fulcrum within a surgical incision, wherein the improvement comprises: said point is a rigid spike fixed to and projecting beyond said one end of the band, and the spike has a diameter of at least 2 mm except at the apex and extends not more than 1.25 cm beyond the end of the band.
Claim 17
Dependent Claim
21 words
Force-fulcrum retractor as defined in claim 14 wherein said spike is formed with a flat which is fixed to the band.
Claim 18
Dependent Claim
44 words
Force-fulcrum retractor as defined in claim 14 wherein said spike has a circular cross section and is in the form of a claw which is gently curved so that its point extends at an acute angle with the said one end of the band.
Claim 19
Dependent Claim
79 words
Force-fulcrum retractor comprising a broad band having at one end at least one point to establish a fulcrum within a surgical incision, wherein the improvement comprises: said point is a rigid spike fixed to and projecting beyond said one end of the band, which spike has a circular cross section and is in the form of a claw which is gently curved so that its point extends at an acute angle with the said one end of the band.
Claim 20
Dependent Claim
79 words
Force-fulcrum retractor comprising a broad band having at one end at least one point to establish a fulcrum within a surgical incision, wherein the improvement comprises: said point is a rigid spike fixed to and projecting beyond said one end of the band, which spike has a circular cross section and is in the form of a claw which is gently curved so that its point extends at an acute angle with the said one end of the band.
Claim 21
Dependent Claim
30 words
Force-fulcrum retractor as defined in claim 17 wherein each spike is formed with a flat which is fixed to the band by a technique selected from welding, sweat-soldering, and brazing.
Claim 22
Dependent Claim
22 words
Force-fulcrum retractor as defined in claim 18 wherein each spike projects from 0.5 to 1.25 cm beyond the end of the band.
Claim 23
Dependent Claim
22 words
Force-fulcrum retractor as defined in claim 19 wherein each spike has a diameter of at least 2 mm except at the apex.
References Cited (Backward Citations)
US3542015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |