Source: http://www.google.com/patents/US20020123767?dq=6,712,702
Timestamp: 2016-06-30 22:37:08
Document Index: 95429187

Matched Legal Cases: ['art 3', 'art 4', 'art 4', 'art 4', 'arts 3', 'art 4', 'art 4', 'art 16', 'art 16', 'art 2', 'art 16']

Patent US20020123767 - Surgical forceps - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe invention relates to a surgical forceps with a forceps jaw, with a handle consisting of two grip parts with which the one first grip part is connected to a forceps housing and the other second grip part is pivotable for opening and closing the jaw mouth, with an adjustment rod which is distally and...http://www.google.com/patents/US20020123767?utm_source=gb-gplus-sharePatent US20020123767 - Surgical forcepsAdvanced Patent SearchPublication numberUS20020123767 A1Publication typeApplicationApplication numberUS 10/086,264Publication dateSep 5, 2002Filing dateMar 1, 2002Priority dateMar 2, 2001Also published asDE10110106A1, DE10110106B4, US6752823Publication number086264, 10086264, US 2002/0123767 A1, US 2002/123767 A1, US 20020123767 A1, US 20020123767A1, US 2002123767 A1, US 2002123767A1, US-A1-20020123767, US-A1-2002123767, US2002/0123767A1, US2002/123767A1, US20020123767 A1, US20020123767A1, US2002123767 A1, US2002123767A1InventorsStephan PrestelOriginal AssigneeRichard Wolf GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (2), Referenced by (42), Classifications (10), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetSurgical forceps
DETAILED DESCRIPTION OF THE INVENTION [0027] In FIG. 1 there is to be recognized a surgical forceps 1 which comprises a forceps jaw 2 which by actuation of one of the two grips 3 and 4 of a handle 5 may be opened and closed in a manner known per se. The first grip part 3 is rigidly fastened on a forceps housing 6 whilst the second grip part 4 is pivotably mounted in a jointed manner on the forceps housing 6. The forceps low is attached on the distal end region of a shank 15 designed in a tubular manner. In the shank 15 there is arranged an adjusting rod 7 in an axially displaceable manner. Its axial displacement movement on account of an actuation of the handle effects in the usual manner the opening and t he closing of the forceps jaw 2. [0028] The proximal end of the adjusting rod 7 is in direct contact with the limb 8 of the second grip part 4. For effecting the overload protection the connection between the proximal end of the adjusting rod 7 and the limb 8 is created by a spring element 9. This consists of a flat material wound in a sepentine manner, wherein the windings of the element 9 lie in a plane, in the case of FIG. 1, in the plane of the drawing. [0029] The comparison of FIG. 1 with FIG. 2 shows the manner of acting of the spring element 9. Whilst the forceps 1 in FIG. 1 is to be seen with an opened forceps jaw 2, this is closed in FIG. 2. By way of pivoting the second grip part 4 in the clockwise direction for closing the forceps jaw 2 the spring element 9 is loaded in tension. The tension force is transmitted via the adjusting rod 7 which with this moves proximally, onto the pivotingly movable jaw part of the forceps jaw 6. [0030] Also with an increased actuation of the handle 5 this does not lead to a destruction of the forceps 1, since excess actuation forces are avoided by the spring element 9 since the spring element with this is extended and accommodates a part of the forces. Such a deformation of the spring element is effected for the protection of the forceps always when between the two jaw part limbs there is located for example an object to be grasped, such as e.g. tissue or bone part, and the two grip parts 3, 4 of the handle 5 are excessively pressed together. [0031] The jaw mouth 2 may be opened against the effect of a compression spring which is located in the forceps housing 6 and is shown schematically in FIG. 1 and 2. The compression spring formed as a helical spring and which is run through by the adjusting rod 7 is arranged in a sleeve 11 adjustable axially in the rod housing on pivoting the grip part 4, and is supported with its one end on the base 11 a of the sleeve 11 open at one end and with its other end is supported on a shoulder 6 a in the forceps housing 6 (FIG. 2). [0032] As can be seen in FIG. 3 here there are arranged two spring elements 9′ and 9″ connected parallel next to one another. The whole spring stiffness is thus doubled in comparison to a design with only one spring according to the FIGS. 1 and 2. [0033] Details of this are shown in FIGS. 4, 5 and 6. The spring elements 9′ and 9″ consist in each case of a number of windings 10, 10′ or 10, 10″. The windings have limbs 13 which above and below are connected to winding webs 14. The respective ends of the spring elements 9, 9′, 9″ are provided with knuckle eyes 12. The respective ends of the spring elements 9, 9′, 9″ in each case with one pin to be inserted through in each case one knuckle eye may be releasably connected to the proximal end of the adjusting rod 7 and to the limb 8 of the second grip part 4. The pins at the same time also engage through corresponding bores in the adjusting rod 7 or in the limb 8. [0034] Both spring elements 9′ and 9″ are assembled next to one another. As is to be deduced from FIG. 6 both elements 9′ and 9″ are designed such that the windings 10′ of the one spring element 9′ in relation to the windings 10″ of the spring element 9″ arranged next to it run displaced by half the width of a winding. With this there results as a whole a largely closed surface of the spring assembly by which means it is ensured that a jamming in for example of a finger of the operator on actuation of the forceps is ruled out. [0035] So that between the spring elements 9′ and 9″ installed between the adjusting rod 7 and the limb 8 project as little as p possible out of the upper bordering of the forceps housing 6 the knuckle eyes 12 provided for receiving joint pins, with respect to the longitudinal middle axis of the one spring element 9′, are arranged displaced with respect to those of the other spring element 9″, as becomes clear with a comparison of FIG. 4 and 5. Both spring elements 9′ and 9″ are thus not formed mirror symmetrical to the common longitudinal middle axis. [0036] As may further be deduced from FIG. 4 and 5 in each case neighbouring limbs 13 of the windings 10, 10′, 10″ diverge in the direction of the winding web 14 connecting them or converge in the direction of the winding free space, by which means different than with a likewise practicable parallel course of the limbs a relatively small length of the spring elements may be achieved with a large spring path despite this. [0037] By way of a suitable design of the individual winding of the spring element 9, 9′, 9″, thus by way of the suitable selection of the dimensions of length, width and thickness of the windings, but also by way of a suitable material selection, the spring constant of the spring elements 9′, 9″ may be influenced and adapted to the desired case of application. [0038] The parallel arrangement of several spring elements as well as the influencing of the spring constant of an individual spring element by way of modifications of the geometry permit thus a directed influencing of the whole spring stiffness and thus the effect of the overload securement. This represents an enormous advantage with respect to known forceps. [0039] In FIG. 7 there is shown an alternative embodiment form of the forceps 1. Whilst with the embodiment example according to the FIGS. 1 to 6 it is envisaged that the spring element 9 on actuation of the forceps 1, thus on closing the forceps jaw 2 is loaded in tension, with the formation according to FIG. 7 it is such that the spring element 9 in this case is loaded in compression. The comparison of FIG. 7 with FIG. 8 which shows the forceps 1 with a closed forceps jaw 2 makes clear that the spring element 9 is from now on pressed together. According to FIG. 9 also two or more spring elements 9′, 9″ arranged in parallel may be used on closing the forceps jaw loaded in compression. [0040] The concept according to the invention may also be applied to other forceps types. FIG. 10 for example shows a rail shaft forceps. This comprises a two-part longitudinally divided shank 16, wherein a shank part 16 a is stationary and the other shank part 16 b acting as an adjusting rod may be axially adjusted by actuation of the handle 5 for opening or closing the jaw part 2. Also in this forceps as an overlooked protection there is integrated a spring element 9 which is in connection on the one hand with the proximal end of the shank part 16 b and with the pivotable grip part of the handle on the other hand. [0041] Although in the embodiment examples according to the FIGS. 1 to 9 the spring elements are constantly arranged in a proximally situated space above the handle, it is also possible to accommodate them at another location of the forceps, for example in the inside of the forceps shank or in a space in the distal end region of the forceps housing. 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Ltd.Method and apparatus for setting sampling point of low voltage differential signal transmitted between field programmable gate arraysUS20110004221 *Jun 4, 2010Jan 6, 2011Euteneuer Charles LMethods and apparatus for deploying sheet-like materialsWO2012145059A1 *Feb 14, 2012Oct 26, 2012Rotation Medical, Inc.Methods and apparatus for fixing sheet-like materials to a target tissue* Cited by examinerClassifications U.S. Classification606/208, 606/206International ClassificationA61B10/06, A61B17/32, A61B10/00, A61B19/00Cooperative ClassificationA61B17/1608, A61B90/03, A61B10/06European ClassificationA61B10/06Legal EventsDateCodeEventDescriptionMar 1, 2002ASAssignmentOwner name: RICHARD WOLF GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PRESTEL, STEPHAN;REEL/FRAME:012668/0719Effective date: 20020108Sep 26, 2007FPAYFee paymentYear of fee payment: 4Nov 22, 2011FPAYFee paymentYear of fee payment: 8Nov 17, 2015FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services