GB2193141A - Tension measuring forceps - Google Patents

Tension measuring forceps Download PDF

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Publication number
GB2193141A
GB2193141A GB8530676A GB8530676A GB2193141A GB 2193141 A GB2193141 A GB 2193141A GB 8530676 A GB8530676 A GB 8530676A GB 8530676 A GB8530676 A GB 8530676A GB 2193141 A GB2193141 A GB 2193141A
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GB
Grant status
Application
Patent type
Prior art keywords
forceps
piston
substance
cylinder
tension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8530676A
Other versions
GB8530676D0 (en )
Inventor
Ernest Mark Talbot
Original Assignee
Ernest Mark Talbot
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/30Surgical pincettes without pivotal connections
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06Measuring instruments not otherwise provided for
    • A61B2090/064Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension

Abstract

Each of the limbs 14 comprise a piston within a cylinder such that when the forceps are used the cylinder moves a measureable reproduceable distance allowing the tension created in the substance being worked upon to be; measured or reproduced or limited during the procedure, even if the field of view is very limited. <IMAGE>

Description

SPECIFICATION Forceps This invention relates to a pair of forceps where the tension created in a substance by them can be measured.

Forceps when applied to a substance create an unknown tension within it. The ability to measure the force acting on the substance by the forceps is desirable as feedback information to the operator so that he can: 1. Measure the force required to deform a substance in a defined manner.

2. Re-create constant tension within the substance by increasing the force applied until the same measured point is achieved on the scale.

3. Remain below a critical tension.

Forceps comprising of two limbs each of them being resiliently extendible, the arrangement being such that the gripping ends of the limbs are unobscured (so that measurements can be made even if the field of operation is narrow). The extension of the limbs is a measure of the force exerted by the forceps on a body. The extension of the limbs is by means of a piston within a cylinder.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which: Figure 1 shows in perspective the forceps in rest position (valve on side of limb).

Figure 2 shows in perspective the forceps in use position with the piston drawn out (in this drawing the adjustment screw/exit valve is at the proximal end of the cylinder).

Figure 3 illustrates the component parts of one of the two limbs of the forceps.

Figure 4 illustrates the instrument in cross section in the two positions of (a) rest and (b) use.

Referring to the Fig. 3 the forceps comprise of two limbs11 each limb in the form of a piston(12' within a cylinder('3) with the gripping end(l4} of each limb being on the piston and the cylinder forming the handle end of the forceps.

The piston is introduced as far into the cylinder as possible air being vented through the exit valve('5' in the handle. If this valve was mounted on a screw then the screw could vary the unswept volume of the cylinder (acting as fine adjustment). Secondly the screw/exit valve could be removed to allow removal of the piston in order to change it for a differently finished gripping end piece(14).

When a deforming force is applied to a substance, being gripped by the forceps, the tension created within the substance causes the vacuum to be overcome allowing the piston to move down the cylinder a distance. The final distance moved can be used to indicate the tension by reading off a scale engraved on the side of the piston. The movement causes an increase in the vacuum, the piston stops moving when the suction force of the vacuum equals the tension within the substance (friction and gravity ignored) ie. the greater the force applied to a substance, the greater the tension created in the substance, the further the piston moves, the greater the number of engraved graduations on the piston are revealed. This position is seen in Figs. 2 and 4b.

When the forceps are not acting on a substance the vacuum within the cylinder returns the piston to its rest position (Figs. 1 and 4a).

Other means could be used to measure the piston movement such as a spring scale, a pressure transducer, a rectilinear potentiometer, a strain guage, a hydraulic system etc.

The example given is the simplest.

Claims (1)

1. Forceps comprising of two limbs each of them being resiliently extendible, the arrangement being such that the gripping ends of the limbs are unobscured (so that measurements can be made even if the field of operation is narrow). The extension of the limbs is a measure of the force exerted by the forceps on a body. The extension of the limbs is by means of a piston within a cylinder.
2. Forceps as in Claim 1 with the means to measure movement of the cylinder.
2. Forceps as in Claim 1 or Claim 2 with means to change its function. eg. by substituting a piston with a different specialized head.
4. Forceps as in Claim 1 or Claim 2 or Claim 3 with means to finely adjust the vacuum.
5. A tension measuring forcep substantially as described herein with reference to Figs.
1-5 of the accompanying drawing.
GB8530676A 1985-12-12 1985-12-12 Forceps Withdrawn GB8530676D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8530676A GB8530676D0 (en) 1985-12-12 1985-12-12 Forceps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8530676A GB8530676D0 (en) 1985-12-12 1985-12-12 Forceps

Publications (2)

Publication Number Publication Date
GB8530676D0 GB8530676D0 (en) 1986-01-22
GB2193141A true true GB2193141A (en) 1988-02-03

Family

ID=10589674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8530676A Withdrawn GB8530676D0 (en) 1985-12-12 1985-12-12 Forceps

Country Status (1)

Country Link
GB (1) GB8530676D0 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351165A1 (en) * 1988-07-13 1990-01-17 Rodger D. Bodoia Surgical forceps
US5301658A (en) * 1992-04-27 1994-04-12 Loma Linda University Medical Center Membrane endoscopic retractor
CN102507177A (en) * 2011-11-29 2012-06-20 巨力索具股份有限公司 Hydraulic separating clamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB690823A (en) * 1950-05-02 1953-04-29 Hermes George Nicholas Improvements in or relating to tweezers
FR2166839A5 (en) * 1972-05-10 1973-08-17 Bras Jean
EP0115624A2 (en) * 1983-01-07 1984-08-15 Gundolf Dr. Breger Skin transplant tension measuring apparatus
GB2159288A (en) * 1984-05-18 1985-11-27 Krupp Gmbh Measuring the force of adhesion of taper crowns

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB690823A (en) * 1950-05-02 1953-04-29 Hermes George Nicholas Improvements in or relating to tweezers
FR2166839A5 (en) * 1972-05-10 1973-08-17 Bras Jean
EP0115624A2 (en) * 1983-01-07 1984-08-15 Gundolf Dr. Breger Skin transplant tension measuring apparatus
GB2159288A (en) * 1984-05-18 1985-11-27 Krupp Gmbh Measuring the force of adhesion of taper crowns

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351165A1 (en) * 1988-07-13 1990-01-17 Rodger D. Bodoia Surgical forceps
US5047046A (en) * 1988-07-13 1991-09-10 Bodoia Rodger D Surgical forceps
US5301658A (en) * 1992-04-27 1994-04-12 Loma Linda University Medical Center Membrane endoscopic retractor
CN102507177A (en) * 2011-11-29 2012-06-20 巨力索具股份有限公司 Hydraulic separating clamp

Also Published As

Publication number Publication date Type
GB8530676D0 (en) 1986-01-22 grant

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)