US3785381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensing obstetrical forceps
Assignee: Individual
•
Filing: 1973-01-22
•
Granted: 1974-01-15
•
Expires: 1993-01-22
Abstract
Abstract An obstetrical forceps having a pressure sensing device combined therewith is disclosed. The forceps include pivotably connectable blades, each having fetal engaging and handle portions. The pressure sensing device is constructed and arranged on the forceps to sense and indicate pressure applied to a fetus when using the forceps. The device includes a pressure sensor such as a deflectable diaphram arranged on the tip of the fetal engaging portion of the blade and a pressure indicator communicating with the diaphram through tubing or the like. The tubing is filled with an incompressible fluid, such as distilled water. When the sensor deflects as pressure is applied to a fetus, the pressure will be transmitted by the water through the tubing to the indicator.
Inventors
- 👤 B Lower
- 👤 K Hughes
- 👤 L Laufe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:15
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/42; A61B17/44; G; G01; G01L; G01L5/00; G01L5/0028; A61B2017/445; A61B90/00; A61B90/06; A61B2090/064
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
122 words
Obstetrical forceps comprising: a pair of elongated members, each of which has a fetal engaging blade portion at one end thereof and a handle portion at the opposite end thereof, said members being pivotably connected with each other and freely movable with respect to each other when so connected, pressure deformable means secured to at least one of said elongated members and responsive to the pressure applied to a fetus by the user of the forceps for sensing and communicating such applied pressure; pressure indicating means connected to the fetal engaging blade portions of said deformable pressure means and disposed in the region of said handle portions of said elongated members for indicating the applied pressure to the user of the forceps.
Claim 2
Dependent Claim
122 words
Obstetrical forceps comprising: a pair of elongated members, each of which has a fetal engaging blade portion at one end thereof and a handle portion at the opposite end thereof, said members being pivotably connected with each other and freely movable with respect to each other when so connected, pressure deformable means secured to at least one of said elongated members and responsive to the pressure applied to a fetus by the user of the forceps for sensing and communicating such applied pressure; pressure indicating means connected to the fetal engaging blade portions of said deformable pressure means and disposed in the region of said handle portions of said elongated members for indicating the applied pressure to the user of the forceps.
Claim 3
Dependent Claim
26 words
Obstetrical forceps as set forth in claim 1 wherein said pressure deformable means includes a pressure sensor secured to the tip section of said blade portion.
Claim 4
Dependent Claim
44 words
Obstetrical forceps as set forth in claim 1 wherein said pressure means includes a resilient member arranged to contact a fetus and constructed to be biased in a direction towards a fetus and to deflect in an opposite direction upon contact with a fetus.
Claim 5
Dependent Claim
37 words
Obstetrical forceps as set forth in claim 3 wherein said pressure means includes tubing means communicating between said resilient member and said indicating means, and pressure transmitting means contained in said resilient means and said tubing means.
Claim 6
Dependent Claim
23 words
Obstetrical forceps as set forth in claim 1 wherein said pressure means and said indicating means are detachably secured to said elongated member.
Claim 7
Dependent Claim
17 words
Obstetrical forceps as set forth in claim 4 wherein said pressure transmitting means is an incompressible fluid.
Claim 8
Dependent Claim
26 words
Obstetrical forceps as set forth in claim 6 including valve means on said tubing means for selectively charging and discharging said fluid from said pressure means.
Claim 9
Dependent Claim
22 words
Obstetrical forceps as set forth in claim 1 wherein said pressure means and said indicating means are constructed of autoclavable pressure materials.
Claim 10
Dependent Claim
19 words
Obstetrical forceps as set forth in claim 1 wherein said pressure means is constructed of a molded polymeric material.
Claim 11
Dependent Claim
94 words
In combination with obstetrical forceps including a pair of forcep blades pivotably connected to each other and having fetal engaging portions and handle portions, a device for sensing the applied pressure on a fetus, comprising: pressure deformable means secured to at least one of fetal engaging portions and responsive to the applied pressure on a fetus for sensing and communicating the applied pressure; and indicating means connected to said pressure means and constructed to be disposed in the region of the handle portions for indicating the applied pressure to the user of the forceps.
Claim 12
Dependent Claim
94 words
In combination with obstetrical forceps including a pair of forcep blades pivotably connected to each other and having fetal engaging portions and handle portions, a device for sensing the applied pressure on a fetus, comprising: pressure deformable means secured to at least one of fetal engaging portions and responsive to the applied pressure on a fetus for sensing and communicating the applied pressure; and indicating means connected to said pressure means and constructed to be disposed in the region of the handle portions for indicating the applied pressure to the user of the forceps.
Claim 13
Dependent Claim
44 words
The combination as set forth in claim 10 wherein said pressure means includes a resilient member arranged to contact a fetus and constructed to be biased in a direction towards a fetus and to deflect in an opposite direction upon contact with a fetus.
Claim 14
Dependent Claim
37 words
The combination as set forth in claim 11 wherein said pressure means includes tubing means communicating between said resilient member and said indicating means, and pressure transmitting means contained in said resilient means and said tubing means.
Claim 15
Dependent Claim
17 words
The combination as set forth in claim 12 wherein said pressure transmitting means is an incompressible fluid.
Claim 16
Dependent Claim
33 words
The combination as set forth in claim 10 wherein said pressure means includes a pressure sensor adapted to be secured to the tip section of a fetal engaging portion of a forceps blade.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |