Source: http://www.google.com/patents/US20030097147?ie=ISO-8859-1&dq=5754119
Timestamp: 2015-02-28 06:28:40
Document Index: 252076100

Matched Legal Cases: ['art 22', 'art 22', 'art 24', 'art 24', 'art 22', 'art 22', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26', 'art 26', 'art 28', 'arts 26', 'arts 26', 'art 26', 'art 26', 'art 28', 'art 28', 'arts 26', 'arts 26', 'art 26', 'arts 26', 'art 26', 'art 28', 'art 26', 'art 26', 'art 26', 'art 26', 'art 28', 'art 26', 'art 26', 'art 26', 'art 26', 'arts 26', 'arts 26', 'arts 26', 'arts 26']

Patent US20030097147 - Medical forceps - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe invention relates to a medical forceps with a tubular outer shank on whose distal end there is formed a forceps jaw with two jaw parts, wherein the two jaw parts in each case at two sides opposite one another are rotatably mounted on the outer shank, with a tubular inner shank for actuating the jaw...http://www.google.com/patents/US20030097147?utm_source=gb-gplus-sharePatent US20030097147 - Medical forcepsAdvanced Patent SearchPublication numberUS20030097147 A1Publication typeApplicationApplication numberUS 10/299,111Publication dateMay 22, 2003Filing dateNov 19, 2002Priority dateNov 19, 2001Also published asDE10156313A1, DE50209220D1, EP1312313A1, EP1312313B1, US7186261Publication number10299111, 299111, US 2003/0097147 A1, US 2003/097147 A1, US 20030097147 A1, US 20030097147A1, US 2003097147 A1, US 2003097147A1, US-A1-20030097147, US-A1-2003097147, US2003/0097147A1, US2003/097147A1, US20030097147 A1, US20030097147A1, US2003097147 A1, US2003097147A1InventorsStephan PrestelOriginal AssigneeRichard Wolf GmbhExport CitationBiBTeX, EndNote, RefManClassifications (8), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetMedical forceps
US 20030097147 A1Abstract
The invention relates to a medical forceps with a tubular outer shank on whose distal end there is formed a forceps jaw with two jaw parts, wherein the two jaw parts in each case at two sides opposite one another are rotatably mounted on the outer shank, with a tubular inner shank for actuating the jaw parts, which is displaceably arranged in the inside of the outer shank in its longitudinal direction, wherein the inner shank is coupled via two lever systems to the two jaw parts for their actuation and in each case one of the lever systems is linked on the two jaw parts on one of the two sides opposite one another. Images(7) Claims(13)
DETAILED DESCRIPTION OF THE INVENTION [0028]FIG. 1 shows in a sectioned view the total view of the forceps according to the invention. The medical forceps comprises a forceps shank 2 at whose distal end there is arranged a forceps jaw 4 and at whose proximal end there is arranged a forceps handle 6. The forceps shank 2 consists of an outer shank 8 and of an inner shank 10 arranged in the inside of the outer shank. The outer shank 8 and the inner shank 10 are tubular, in particular formed with a circular cross section. At the same time the inner shank 10 has an outer diameter which essentially corresponds to the inner diameter of the outer shank 8. This permits the inner shank 10 to be guided in the outer shank 8 in a fitting manner and essentially free of play or with little play. The optics 12 extend from the proximal end of the forceps into the inner shank 10 and through this preferably up to the distal end 14 of the inner shank 10 in order to permit an observation of the region surrounding the forceps jaw 4 or of the region situated in front of the forceps jaw 4 during the operation. [0029] At the proximal end of the forceps there is provided a forceps housing 16 proceeding from which the forceps shank 2 extends in the distal direction. In the forceps housing 16 at the distal end there is arranged a rotatable hand wheel 11 which is rigidly connected to the outer shank 8. The outer shank 8 may be rotated about its longitudinal axis by way of rotating the hand wheel 11. At the proximal end of the forceps housing 16 there is formed a cone receiver 18 in which the optics 12 may be releasably fixed. Furthermore a sliding sleeve 20 is arranged in the inside of the forceps housing 16. The sliding sleeve 20 is displaceable in the forceps housing 16 in the longitudinal direction of the outer shank 8 and of the inner shank 10. The sliding sleeve 20 is connected to the movable handle part 22 for actuating the sliding sleeve 20. The movable handle part 22 is pivotably mounted on the stationary handle part 24. The rigid handle part 24 is connected to the forceps housing 16. The sliding sleeve 20 is displaced in the axial direction, i.e. in the longitudinal direction of the forceps shank 2 in the forceps housing 16 by way of pivoting the movable handle part 22. The sliding sleeve 20 is rigidly connected to the inner shank 10. Thus the inner shank 10 is displaced in its longitudinal direction, i.e. in the axial direction of the forceps shank 2 in the outer shank 18, on actuation of the movable handle part 22. [0030]FIG. 2 shows a detailed view of the forceps jaw 4 in the closed condition. FIG. 2 is a lateral view of the forceps jaw 4 in the direction of the arrow B in FIG. 1. The forceps jaw is formed by two jaw parts 26, 28. The two jaw parts 26 and 28 are formed spade or shell shaped so that together in the closed condition they likewise have an essentially tubular cross section. This means that the jaw parts 26 and 28 in the closed condition enclose a free space. The jaw parts 26 and 28 are rotatably mounted on two diametrally opposite sides in each case on a rotation point 30 on the outer shank 8. At the same time the jaw parts 26 and 28 on each side are in each case mounted in a common rotation point 30. Furthermore in the region of its distal end on the outer shank 8 there is formed a longitudinal groove 32 which extends in the longitudinal direction of the outer shank 8. In each case there is formed a longitudinal groove 32 on each of the diametrically opposite sides on which the rotation points 30 are also provided. Elongate projections 34 engage into these longitudinal grooves 32. The projections 34 extend likewise in the longitudinal direction of the forceps shank 2 or of the outer shank 8. The projections 34 are rigidly formed in the region of the distal end 14 of the inner shank 10 on this and extend from this radially outwards. The longitudinal grooves 32 in their longitudinal direction are formed longer than the projections 34 so that the projections are movable in the longitudinal grooves 32 in the longitudinal direction. In this manner the projections 34 and thus the inner shank 10 are guided in the longitudinal grooves with a movement in the longitudinal direction of the forceps shank 2. Furthermore the longitudinal grooves 32 have the effect that on rotation of the outer shank 8 via the hand wheel 11 the inner shank 10 is correspondingly co-rotated so that the complete forceps shank 2 with the forceps jaw 4 may be rotated with respect to the forceps housing 16 about the longitudinal axis of the forceps shank 2. [0031]FIG. 3 shows a view of the forceps jaw 4 according to FIG. 2, wherein the forceps jaw 4 is opened. For opening the forceps jaw 4 the inner shank 10 in its longitudinal direction is displaced in the inside of the outer shank 8 in the distal direction. At the same time the projections 34 also displace in the longitudinal grooves. With a suitable dimensioning of the length of the longitudinal grooves and the corresponding projections 34 the end faces of the longitudinal grooves and the projections may serve as abutments for limiting the movement of the inner shank 10 in its longitudinal direction. A linkage point 36 is in each case formed on the projections 34. In total therefore there are provided two linkage points 36 on the two diametrically opposite sides of the forceps shank 2, on which the rotation points 30 are also arranged. The linkage points 36 in each case lie with one of the rotation points 30 on a common axis which extends parallel to the longitudinal axis of the forceps shank 2 on its side. On the linkage points 36 there are linked transmission levers 38 and 39 which pivot the jaw parts 26 and 28 about their rotation pints 30. Furthermore in FIG. 3 the maximal field of view S for optics arranged in the inside of the inner shank 10 is indicated. This field of view S extends proceeding from the distal end 14 of the inner shank 10. Such a large field of view S is made possible in that all mounting and actuation elements, i.e. the transmission levers 38, 30, the rotation points 30 as well as the linkage points 36 are arranged on two sides of the outer shank 8 diametrically opposite one another. This allows openings to be formed between these two opposite sides or side regions in the outer shank 8 which permit a correspondingly large field of view S. [0032] The exact construction of the lever system for actuating the jaw parts 26 and 28 is explained in more detail by way of the schematic representation in FIG. 4. The view in FIG. 4 corresponds essentially to the view according to FIG. 2, the forceps jaw 4 is however shown sectioned in order to show the individual lever elements. The jaw parts 26 and 28 are shown in the closed condition. Since the jaw parts 26, 28 in each case are linked and mounted on two diametrically opposite sides of the forceps shank 2, all lever and actuation elements are formed in an identical manner on the two diametrically opposite sides of the forceps shank 2. For this reason hereinafter the design on one of the two sides is explained, the lever elements on the opposite side are designed identical. The projection 34 axially movable in the longitudinal direction of the forceps jaw 2 in the longitudinal groove 32 is rigidly connected to the inner shank 10 (not shown in FIG. 4). A linkage point 36 is formed on the projection 34. The two transmission levers 38 and 39 are pivotably linked or mounted on this linkage point 36. For this in each case there is provided a bore in the projection 34 and in the transmission levers 38, 39 through which there extends a rivet or bearing bolt. The transmission levers 38 and 39 are designed bent at an angle so that in the installed condition they are bent at an angle in two opposite directions to the longitudinal axis x or a plane through the longitudinal axis x and the rotation points 30. On ends of the transmission levers 38 and 39 which lie opposite the linkage points 36 there are provided rotation points 40 and 42 respectively. On account of the angled design of the transmission levers 38 and 39 the rotation points 40 and 42 lie outside the plane or axis which extends through the rotation points 30 and linkage points 36. [0033] In the rotation points 40 and 42 the transmission levers 38 and 39 are rotatably connected to the jaw parts 26 and 28. This may likewise be achieved by bearing bolts or rivets which are applied into corresponding holes in the transmission levers 38, 39 and the jaw parts 26, 28. The jaw parts 26 and 28 comprise linkage levers 44 and 46. The linkage lever 44 is formed as one piece with the jaw part 26 and the linkage lever 46 as one piece with the jaw part 28. Proceeding from the associated jaw parts 26 and 28 the linkage levers 42 and 44 extend in the opposite direction, i.e. in the proximal direction of the forceps beyond the rotation point. At the same time the linkage levers 44 and 46 are bent at an angle with respect to the associated jaw parts 26 and 28 in a manner such that the jaw part 26 via the linkage lever 44 is linked on the rotation point on the side opposing or lying opposite the jaw part 26 with respect to the longitudinal axis x. Accordingly the jaw part 28 via the linkage lever 46 is linked on the rotation point 42 on the side which lies opposite the jaw part 28 with respect to the longitudinal axis x. In this manner one creates a parallelogram mechanism, wherein the rotation points 40 and 42 are distanced at a direction perpendicular to the x axis and from this axis. This has the effect that the connection lines between the rotation points 40 and 42 with the rotation point 30 as well as the linkage point 36 run at an angle to the rotational axis x. This ensures that with a movement of the linkage point 36 in the direction of the longitudinal axis in the distal direction, the two rotation points 40 and 42 are pressed apart by way of the transmission levers 36 and 39 so that they move away from one another. With this movement of the rotation points 40 and 42 the linkage levers 44 and 46 connected to these and thus likewise the associated jaw parts 26 and 28 are pivoted about the rotation point 30 so that the forceps jaw 4 opens. The movement of the linkage point 36 in the longitudinal direction x is effected by a movement of the inner shank 10 in its longitudinal direction since the inner shank 10 is rigidly connected to the projection 34. [0034]FIG. 5 shows a section view of the forceps jaw according to FIG. 4 in the direction of the arrows A in FIG. 4. The distal end region 48 of the outer shank 8, on two diametrically opposite sides, forms in each case a receiver gap 50 in which the linkage and transmission levers 44, 46 and 38 and 39 respectively are arranged. The levers are arranged lying over one another or overlapping, in a manner such that the transmission lever 39 on one of the sides lying diametrically opposite lies radially further inwards with respect to the longitudinal axis x than on the opposite side. Accordingly the associated linkage levers on one side are arranged lying further radially inwards than on the other side. Thus the linkage and transmission levers 38, 39, 44 and 46 form an extremely flat parallelogram mechanism which is arranged in the respective receiver gap 50. For its design also in each case one of the linkage levers 44 or 46 on the jaw parts 26 and 28 on the one side are situated lying further inwards to the longitudinal axis x than the diametrically opposed side. On the side at which the linkage lever 46 lies further outwards, the associated transmission lever 39 lies further inwards and on the side on which the linkage lever 46 lies further inwards, the associated transmission lever 39 lies further outwards. This correspondingly applies to the linkage levers 44 of the jaw part 26 and the associated transmission levers 38. The linkage levers 44, 46 and transmission levers 38, 39 are in each case arranged parallel to one another and lying over one another or overlapping in the receiver gaps 50. [0035]FIG. 6 shows a view according to FIG. 4 with which the forceps jaw 4 is opened. As already explained by way of FIG. 4, for opening the forceps jaw 4 the inner shank 10 (not shown in FIG. 6) in the inside of the outer shank 8 is moved along the longitudinal axis in the direction of the distal end of the forceps, i.e. in the direction of the forceps jaw 4. At the same time on each of the diametrically opposite sides the projection 34 with the linkage point 36 likewise moves in the direction of the distal end. By way of this on each side the transmission levers 38 and 39 are pressed outwards so that the rotation points 40 and 42 move away from one another. Since the linkage levers 44 and 46 at the rotation points 40 and 42 are rotatably connected to the transmission levers, with this movement the linkage levers 44 and 46 are rotated about the respective rotation point 30. At the same time the jaw parts 26 and 28 are likewise rotated about both rotation points 30 so that the forceps jaw opens 4. [0036]FIG. 7 shows an individual view of a jaw part 26. The jaw part 28 is designed identically to the jaw part 26. The jaw part 26 is shell-shaped, wherein at the lowest point there is formed an opening 52. The opening 52 permits one to observe the region of the surroundings of the forceps jaw 4 through the inside of the forceps through the hole when the forceps jaw is closed. The linkage levers 44 extend in the proximal direction at the distal end of the jaw part 26. The linkage levers 44 extend parallel to the longitudinal axis x. In the linkage levers 44 there are formed suitable bores for the rotation points 30 and 42 for connecting to the outer shank 8 and the transmission levers 39. The two linkage levers 44 are formed on two diametrically opposite sides of the jaw part 26. At the same time on one side the linkage lever 44a lies further inside, i.e. closer to the longitudinal axis x than the linkage lever 44 b on the diametrically opposite side. This formation permits the displaced overlapping arrangement of linkage and transmission levers. The transmission levers 46 on the second jaw part 28 are designed identically. [0037]FIG. 8 shows a section view of the jaw part 26 according to FIG. 7 along line 1-1 in FIG. 7. In FIG. 8 the shell-shaped design of the jaw part 26 can be seen, wherein the opening 52 is arranged at the lowest point, i.e. at that point which lies farthest from the middle axis of the forceps shank 2. The linkage lever 44 or 44 b is designed bent at an angle to the jaw part 26 so that the rotation point 42 is distanced further radially from the outer side 54 of the jaw part 26 than the rotation point 30. This permits the two jaw parts 26 and 28 to be arranged over one another in a manner such that they are rotatable about the same common rotation point 30 and cross over the two linkage levers 44 and 46. In this manner one may create the parallelogram mechanism explained by way of FIG. 4 which permits a secure actuation of the forceps jaw 4 without danger of any jamming. [0038]FIG. 9 shows a detailed view of a transmission lever 39. The transmission lever 38 at one end comprises an opening or bore for the rotation point 40 and at the opposite end a hole or a bore for the linkage point 36. Bearing and joint bolts or rivets may extend through these holes. The linkage lever 38 has a bent configuration as is explained by way of FIG. 4. [0039] As a whole the medical forceps according to the invention has an extremely slim arrangement of all mounting and actuation elements for the forceps jaw 4 on two diametrically opposite sides of the forceps shank 2. In particular the actuation elements, i.e. the linkage levers 44, 46 and the transmission levers are in each case arranged in the same circumferential region as the rotation points 30 on which the jaw parts 26 and 28 are mounted. In this manner the circumferential regions which are required for mounting and linkage of the jaw parts 26 and 28 on the forceps shank 2 may be designed very slimline so that in the remaining circumferential region the field of view S of optics 12 arranged in the forceps shank is not limited. Furthermore the linkage of the jaw parts on both sides permits the production of a large clamping force of the forceps, wherein both jaw parts 26, 28 are led in a torsionally stiff manner. LIST OF REFERENCE NUMERALS [0040]2�forceps shank [0041]4�forceps jaw [0042]6�handle [0043]8�outer shank [0044]10�inner shank [0045]11�hand wheel [0046]12�optics [0047]14�distal end of the inner shank [0048]16�forceps housing [0049]18�cone connection [0050]20�displacement sleeve [0051]22�moveable handle part [0052]24�rigid handle part [0053]26,28�jaw part [0054]30�rotation point [0055]32�longitudinal groove [0056]34�projection [0057]36�linkage point [0058]38,30�transmission lever [0059]40,42�rotation points [0060]44, 46�linkage levers [0061]48�distal end region of the outer shank [0062]50�receiver gap [0063]52�opening [0064]54�outer side Classifications U.S. Classification606/205International ClassificationA61B19/00, A61B17/28Cooperative ClassificationA61B2017/2902, A61B17/29, A61B2017/2939, A61B19/5212European ClassificationA61B17/29Legal EventsDateCodeEventDescriptionApr 26, 2011FPExpired due to failure to pay maintenance feeEffective date: 20110306Mar 6, 2011LAPSLapse for failure to pay maintenance feesOct 11, 2010REMIMaintenance fee reminder mailedNov 19, 2002ASAssignmentOwner name: RICHARD WOLF GMBH (A GERMAN CORPORATION), GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PRESTEL, STEPHAN;REEL/FRAME:013518/0884Effective date: 20021017RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services