Spanner
(19)AUSTRALIAN PATENT OFFICE (54) Title Spanner (51)6 International Patent Classification(s) B25B 007/02 (21) Application No: 2002242695 (22) Application Date: 2002 .01.26 (87) WIPO No: WO02/062533 (30) Priority Data (31) Number (32) Date 101 05 653.2 2001 .02.08 (33) Country DE 200509157 (43) Publication Date : 2002.08.19 (43) Publication Journal Date : 2003 .02.13 (71) Applicant(s) KNIPEX-WERK C. GUSTAV PUTSCH GMBH & CO. KG (72) Inventor(s) Hirse, Gemot(-1-1) Application NoAU2002242695 A8(19)AUSTRALIAN PATENT OFFICE (54) Title Spanner (51)6 International Patent Classification(s) B25B 007/02 (21) Application No: 2002242695 (22) Application Date: 2002 .01.26 (87) WIPO No: WO02/062533 (30) Priority Data (31) Number (32) Date 101 05 653.2 2001 .02.08 (33) Country DE 200509157 (43) Publication Date : 2002.08.19 (43) Publication Journal Date : 2003 .02.13 (71) Applicant(s) KNIPEX-WERK C. GUSTAV PUTSCH GMBH & CO. KG (72) Inventor(s) Hirse, Gemot-1- The invention relates to a spanner for hexagonal shaped objects (5), comprising an upper and lower jaw (1 or 2), which are respectively connected in a single-piece to the limb of a handle (4 or 3). Both jaws (1, 2) are connected together in a pivoting manner in a length-adjustable single joint (6). The upper jaw (1) comprises a flat, smooth clamping surface (9) and a stop (10). The lower jaw (2) comprises a curved convex, flat clamping cam surface (11), which lies adjacent to a respectively associated lower flank surface (12) for all hexagonal objects (5) of all wrench sizes which are to be accommodated. Gripping wrench for hexagonal objects, comprising an upper wrench jaw and a lower wrench jaw (1, 2), which are respectively connected in a unitary manner to a handle limb (3, 4), the wrench jaws being pivotably connected to each other in a longitudinally adjustable pivot joint (6), characterized by the following features:
a) the upper wrench jaw (1) has a planar smooth gripping surface (9) and a stop (10) in the form of an abutment surface which is angled at 120° in relation to the gripping surface, a flank surface (13) of the hexagonal object which is in each case accommodated engaging against the gripping surface (9) and the neighbouring flank surface (14) engaging against the stop (10);b) in the most closed position of the gripping wrench, the pivot axis (6a) of the pivot joint (6) lies approximately on a straight line (6b) which is perpendicular to the plane of the gripping surface (9) at the inner corner point (9a) of that flank surface of the hexagonal object (6) to be gripped which engages against the gripping surface (9);c) the lower wrench jaw (2) has a convexly curved smooth gripping cam surface (11) ;d) in the case of hexagonal objects (5) of all widths across flats to be received, the points of action (12a) of the gripping cam surface (11) lie in the front half of the respectively associated lower flank surface (12) of the hexagonal object (5) to be gripped. Gripping wrench according to Claim 1, characterized in that the adjusting device of the pivot joint (6), which is longitudinally adjustable into at least two positions, runs at an angle (A) of approximately 60° in relation to the gripping surface (9). Gripping wrench according to Claim 1, characterized in that the upper wrench jaw (1) has, between the stop (10) and the adjustable pivot joint (6), a recess (16) extending beyond the hexagon surface of the largest hexagonal object (5) to be gripped. Gripping wrench according to Claim 1, characterized in that behind the convexly curved gripping cam surface (11) there follows on the joint side an indentation (11a). Gripping wrench according to Claim 1, characterized in that the upper wrench jaw (1) reaches only to approximately the centre of the flank surface (13) of the largest hexagonal object (5) to be gripped, which surface engages against the gripping surface (9) . Gripping wrench according to Claim 1, characterized in that the lower wrench jaw (2) does not protrude beyond the convexly curved gripping surface (11). Gripping wrench according to Claim 1, characterized in that, in the case of hexagonal objects (5) of all widths across flats to be received, the points of action (12a) of the gripping cam surface (11) lie between two straight lines (12b, 12c) which, at the inner corner point (9a), form with the gripping surface (9) an angle (B1; B2) of approximately 53° to 67°. Gripping device according to Claim 1, characterized in that the lower wrench jaw (2) does not protrude beyond a limiting line (G), which runs from the outermost corner point (5a) of the hexagonal object (5) to be gripped perpendicularly in relation to the plane of the gripping surface (9). Gripping device according to Claim 1, characterized in that the distance (D1) of the outer limiting surface (4a) of the handle limb (4) connected to the upper wrench jaw (1) from the pivot axis (6a) of the pivot joint (6) is equal to or less than the distance (D2) of the pivot axis (6b) from the point of action (12a) of the gripping cam surface (11).