US3618611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum rotary dissector
Assignee: Urban Engineering Co Inc
•
Filing: 1969-03-05
•
Granted: 1971-11-09
•
Expires: 1989-03-05
Abstract
Abstract The device is a surgical instrument appropriately termed a vacuum rotary dissector, for purposes of performing delicate surgical operations such as brain operations for removing undesired tissue, etc. A thin elongated tubular member or sleeve which is motor driven, rotates within another elongated sleeve having a bullet-shaped end with a side opening in it. At the end of the inner sleeve, there is a cutout providing side edges which are cutting edges that rotate adjacent to the side opening in the outer sleeve, the tip end of the inner sleeve also being bullet shaped to conform to the interior contour of the tip and of the outer sleeve. The improvements reside in the contours of the tip ends of the sleeves, the particular shape of the side opening in the outer sleeve, and the particular configuration of the cutting edges or surfaces on the inner sleeve. Also, axial pressure is maintained on the outer sleeve to urge its end surfaces into engagement with surfaces of the tip of the inner sleeve.
Inventors
- 👤 Julius C Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:02
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A surgical instrument comprising: a support; an outer tubular member extending from said support and having a closed generally hemispherical distal end and a first laterally directed opening adjacent its distal end and extending axially along said outer tubular member and partially along said generally hemispherical end; an inner tubular member rotatably mounted in said outer tubular member and having a complementary generally hemispherical end frictionally bearing on an inner complementary surface of the distal end of said outer tubular member; said inner tubular member having a second laterally directed opening axially coextensive with said first opening and defining generally axially extending cutting edges coincident with the inner surface of said outer tubular member; drive means on said support for continuously rotating said inner tubular member relative to said support and said outer tubular member; and biasing means resiliently urging said tubular members axially relative to each other to maintain said hemispherical ends in close surface contact.
Claim 2
Dependent Claim
157 words
A surgical instrument comprising: a support; an outer tubular member extending from said support and having a closed generally hemispherical distal end and a first laterally directed opening adjacent its distal end and extending axially along said outer tubular member and partially along said generally hemispherical end; an inner tubular member rotatably mounted in said outer tubular member and having a complementary generally hemispherical end frictionally bearing on an inner complementary surface of the distal end of said outer tubular member; said inner tubular member having a second laterally directed opening axially coextensive with said first opening and defining generally axially extending cutting edges coincident with the inner surface of said outer tubular member; drive means on said support for continuously rotating said inner tubular member relative to said support and said outer tubular member; and biasing means resiliently urging said tubular members axially relative to each other to maintain said hemispherical ends in close surface contact.
Claim 3
Dependent Claim
22 words
An instrument as defined in claim 1 wherein said cutting edges include a pointed portion axially intermediate the ends of said openings.
Claim 4
Dependent Claim
20 words
An instrument as defined in claim 1 including means for applying suction to the interior of said inner tubular member.
Claim 5
Dependent Claim
16 words
An instrument as defined in claim 3 including means for selectively varying the degree of suction.
Claim 6
Dependent Claim
29 words
An instrument as defined in claim 1 including means for selectively rotating said outer tubular member relative to said support to direct said first opening in a selected direction.
Claim 7
Dependent Claim
26 words
An instrument as defined in claim 1 wherein said cutting edges are on oPposite sides of said second opening and wherein said drive means are reversible.
Claim 8
Dependent Claim
41 words
An instrument as defined in claim 1 wherein said biasing means comprise spring-urged ball detents on said support engageable with recess means on said outer tubular member, said ball detent means also releasably holding said outer tubular member on said support.
References Cited (Backward Citations)
US1493240A
Cited
DE437932C
Cited
US1663761A
Cited
US2503495A
Cited
US2708437A
Cited
US2721555A
Cited
FR1161400A
Cited
US3173414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |