US5449374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tissue spreading forceps
Assignee: Worcester Polytechnic Institute
•
Filing: 1993-04-01
•
Granted: 1995-09-12
•
Expires: 2013-04-01
Abstract
Abstract A tissue spreading forceps for gripping and spreading tissue include two gripping members which are secured to each other by a spring and are rotatable in relation to each other about a pivot. Initial pressure to the spring causes the gripping members to close and grip tissue at two locations. Additional pressure applied to the spring causes the gripping members to spread apart in relation to each other, thereby spreading the tissue.
Inventors
- 👤 Raymond M. Dunn
- 👤 Allen H. Hoffman
- 👤 Richard Doppler
- 👤 Marc G. Casseres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/28; A61B17/2812; A61B17/02; A61B17/08; A61B17/2833; A61B17/32; A61B17/3209; A61B17/32093; A61B90/00; A61B90/02
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
136 words
Tissue spreading forceps comprising: a first gripping member having proximal and distal ends, the first gripping member having a first jaw at the distal end for gripping tissue at a first location; a second gripping member having proximal and distal ends, the second gripping member having a second jaw at the distal end for gripping tissue at a second location; a joint connecting the first and second gripping members such that the distance between the first and second jaws can be varied, wherein the joint is a pivot for rotatably connecting the first and second gripping members together; and a spring secured to the first and second gripping members such that pressure to the spring closes the first and second jaws and spreads the laws of the first and second gripping members apart from each other.
Claim 2
Dependent Claim
136 words
Tissue spreading forceps comprising: a first gripping member having proximal and distal ends, the first gripping member having a first jaw at the distal end for gripping tissue at a first location; a second gripping member having proximal and distal ends, the second gripping member having a second jaw at the distal end for gripping tissue at a second location; a joint connecting the first and second gripping members such that the distance between the first and second jaws can be varied, wherein the joint is a pivot for rotatably connecting the first and second gripping members together; and a spring secured to the first and second gripping members such that pressure to the spring closes the first and second jaws and spreads the laws of the first and second gripping members apart from each other.
Claim 3
Dependent Claim
13 words
The forceps of claim 1 wherein the spring comprises an arched spring member.
Claim 4
Dependent Claim
18 words
The forceps of claim 2 wherein the spring is secured near the distal end of the gripping members.
Claim 5
Dependent Claim
26 words
The forceps of claim 1 wherein the pivot secures the first and second gripping members at the proximal ends of the first and second gripping members.
Claim 6
Dependent Claim
43 words
The forceps of claim 1 wherein the gripping members comprise: a first leg having a proximal and distal end; and a second leg having a proximal and distal end, the first and second legs being secured to each other at their proximal ends.
Claim 7
Dependent Claim
13 words
The forceps of claim 1 wherein the jaws have a smooth gripping surface.
Claim 8
Dependent Claim
13 words
The forceps of claim 1 wherein the jaws have a textured gripping surface.
Claim 9
Dependent Claim
13 words
The forceps of claim 1 wherein the jaws have a toothed gripping surface.
Claim 10
Dependent Claim
15 words
The forceps of claim 8 wherein the toothed gripping surface is in an arched pattern.
Claim 11
Dependent Claim
23 words
The forceps of claim 1 wherein the pivot rotatably connects the first and second gripping members midway between the proximal and distal ends.
Claim 12
Dependent Claim
25 words
The forceps of claim 10 wherein the spring is secured to the first and second gripping members at the proximal end of the gripping members.
Claim 13
Dependent Claim
127 words
Tissue spreading forceps comprising: a first gripping member for gripping tissue at a first location, the first gripping member having proximal and distal ends; a second gripping member for gripping tissue at a second location, the second gripping member having proximal and distal ends, the first and second gripping members being connected at a joint such that the distal ends of the gripping members are spreadable from each other, wherein the joint is a pivot for rotatably connecting the first and second gripping members together; and a spring secured to the first and second gripping members, such that pressure to the spring closes the first and second gripping members as well as spreads the distal ends of the first and second gripping members apart from each other.
Claim 14
Dependent Claim
127 words
Tissue spreading forceps comprising: a first gripping member for gripping tissue at a first location, the first gripping member having proximal and distal ends; a second gripping member for gripping tissue at a second location, the second gripping member having proximal and distal ends, the first and second gripping members being connected at a joint such that the distal ends of the gripping members are spreadable from each other, wherein the joint is a pivot for rotatably connecting the first and second gripping members together; and a spring secured to the first and second gripping members, such that pressure to the spring closes the first and second gripping members as well as spreads the distal ends of the first and second gripping members apart from each other.
Claim 15
Dependent Claim
13 words
The forceps of claim 12 wherein the spring comprises an arched spring member.
Claim 16
Dependent Claim
23 words
The forceps of claim 12 wherein the pivot secures the first and second gripping members at the proximal ends of the gripping members.
Claim 17
Dependent Claim
18 words
The forceps of claim 12 wherein the spring is secured near the distal end of the gripping members.
Claim 18
Dependent Claim
43 words
The forceps of claim 12 wherein the gripping members comprise: a first leg having a proximal and distal end; and a second leg having a proximal and distal end, the first and second legs being secured to each other at their proximal ends.
Claim 19
Dependent Claim
14 words
The forceps of claim 12 wherein the gripping members have a smooth gripping surface.
Claim 20
Dependent Claim
14 words
The forceps of claim 12 wherein the gripping members have a textured gripping surface.
Claim 21
Dependent Claim
14 words
The forceps of claim 12 wherein the gripping members have a toothed gripping surface.
Claim 22
Dependent Claim
15 words
The forceps of claim 19 wherein the toothed gripping surface is in an arched pattern.
Claim 23
Dependent Claim
22 words
The forceps of claim 12 wherein the pivot rotatably connects first and second gripping members midway between their proximal and distal ends.
Claim 24
Dependent Claim
20 words
The forceps of claim 12 wherein the spring secures the first and second gripping members together at their proximal ends.
Claim 25
Independent Claim
85 words
A method of spreading tissue comprising: gripping the tissue with a pair of forceps, the forceps having a first gripping member for gripping tissue at a first location and a second gripping member for gripping tissue at a second location; an initial level of pressure applied to the gripping members closing the first and second gripping members; and applying an additional level of pressure to the first and second gripping members spreading the first and second gripping members apart thereby spreading the gripped tissue apart.
Claim 26
Independent Claim
85 words
A method of spreading tissue comprising: gripping the tissue with a pair of forceps, the forceps having a first gripping member for gripping tissue at a first location and a second gripping member for gripping tissue at a second location; an initial level of pressure applied to the gripping members closing the first and second gripping members; and applying an additional level of pressure to the first and second gripping members spreading the first and second gripping members apart thereby spreading the gripped tissue apart.
Claim 27
Dependent Claim
21 words
The method of claim 23 wherein the pressure is applied to a spring secured to the first and second gripping members.
Claim 28
Dependent Claim
21 words
The method of claim 23 wherein the pressure is applied to a spring secured to the first and second gripping members.
Claim 29
Dependent Claim
123 words
Tissue spreading forceps comprising: a first gripping member having proximal and distal ends, the first gripping member having a first jaw at the distal end for gripping tissue at a first location; a second gripping member having proximal and distal ends, the second gripping member having a second jaw at the distal end for gripping tissue at a second location; a joint connecting the first and second gripping members such that the distance between the first and second jaws can be varied; and a connecting member coupling the first and second gripping members together for closing first and second jaws and spreading the jaws of the first and second gripping members apart from each other when pressure is exerted on the connecting member.
Claim 30
Dependent Claim
123 words
Tissue spreading forceps comprising: a first gripping member having proximal and distal ends, the first gripping member having a first jaw at the distal end for gripping tissue at a first location; a second gripping member having proximal and distal ends, the second gripping member having a second jaw at the distal end for gripping tissue at a second location; a joint connecting the first and second gripping members such that the distance between the first and second jaws can be varied; and a connecting member coupling the first and second gripping members together for closing first and second jaws and spreading the jaws of the first and second gripping members apart from each other when pressure is exerted on the connecting member.
Claim 31
Dependent Claim
113 words
Tissue spreading forceps comprising: a first gripping member for gripping tissue at a first location, the first gripping member having proximal and distal ends; a second gripping member for gripping tissue at a second location, the second gripping member having proximal and distal ends, the first and second gripping members being connected at a joint such that the distal ends of the gripping members are spreadable from each other; and a connecting member coupling the first and second gripping members together for closing the first and second gripping members and spreading the distal ends of the first and second gripping members apart from each other when pressure is exerted on the connecting member.
Claim 32
Dependent Claim
113 words
Tissue spreading forceps comprising: a first gripping member for gripping tissue at a first location, the first gripping member having proximal and distal ends; a second gripping member for gripping tissue at a second location, the second gripping member having proximal and distal ends, the first and second gripping members being connected at a joint such that the distal ends of the gripping members are spreadable from each other; and a connecting member coupling the first and second gripping members together for closing the first and second gripping members and spreading the distal ends of the first and second gripping members apart from each other when pressure is exerted on the connecting member.
Claim 33
Dependent Claim
101 words
Tissue spreading forceps comprising: a first gripping member for gripping tissue at a first location, the first gripping member having proximal and distal ends; a second gripping member for gripping tissue at a second location, the second gripping member having proximal and distal ends, the first and second gripping members being coupled such that the distal ends of the gripping members are spreadable from each other; and an actuator linked to the first and second gripping members for closing the first and second gripping members and spreading the distal ends of the first and second gripping members apart from each other.
Claim 34
Dependent Claim
101 words
Tissue spreading forceps comprising: a first gripping member for gripping tissue at a first location, the first gripping member having proximal and distal ends; a second gripping member for gripping tissue at a second location, the second gripping member having proximal and distal ends, the first and second gripping members being coupled such that the distal ends of the gripping members are spreadable from each other; and an actuator linked to the first and second gripping members for closing the first and second gripping members and spreading the distal ends of the first and second gripping members apart from each other.
Claim 35
Independent Claim
86 words
A method of spreading tissue with a pair of forceps comprising the steps of: gripping the tissue with the forceps, the forceps having a first gripping member for gripping tissue at a first location and a second gripping member for gripping tissue at a second location, the gripping members gripping the tissue upon actuation of an acutator linked to the first and second gripping members; and spreading the first and second gripping members apart, thereby spreading the gripped tissue apart upon further actuation of the actuator.
Claim 36
Independent Claim
86 words
A method of spreading tissue with a pair of forceps comprising the steps of: gripping the tissue with the forceps, the forceps having a first gripping member for gripping tissue at a first location and a second gripping member for gripping tissue at a second location, the gripping members gripping the tissue upon actuation of an acutator linked to the first and second gripping members; and spreading the first and second gripping members apart, thereby spreading the gripped tissue apart upon further actuation of the actuator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-11 | 1999-03-13 | 1999-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-11 | 2003-03-13 | 2003-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-11 | 2007-03-13 | 2007-09-12 | $7700.00 | Window Closed / Lapsed |