EP0942807B1 - Schraubendreher oder schraubendrehereinsatz - Google Patents
Schraubendreher oder schraubendrehereinsatz Download PDFInfo
- Publication number
- EP0942807B1 EP0942807B1 EP97952010A EP97952010A EP0942807B1 EP 0942807 B1 EP0942807 B1 EP 0942807B1 EP 97952010 A EP97952010 A EP 97952010A EP 97952010 A EP97952010 A EP 97952010A EP 0942807 B1 EP0942807 B1 EP 0942807B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screwdriver
- flank
- notch
- flanks
- face
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B15/00—Screwdrivers
- B25B15/001—Screwdrivers characterised by material or shape of the tool bit
- B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
- B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section
Definitions
- the invention relates to a screwdriver or screwdriver bit with one drive, one Output end and an intermediate shaft, the output end in the form of at least three, preferably four, which ribs is profiled from a center section lying around the axis of rotation radially go out, each have a front end, which has an inclination to the axis of rotation, and front and rear flanks, which in the area adjacent to the forehead essentially run parallel to each other, in which area the front flank on a related to the axis of rotation Diametral surface lies, the flanks being adjacent Ribs a longitudinal notch form with one in the lateral surface of a shaft section leaking notch base.
- the ribs are offset, and essentially by the measure of the rib thickness.
- the a flank namely the breast flank on the insertion side, lies with the corresponding flank of the opposite Rib (of course in the case of cross ribbing) with this on a common diamond.
- the associated screw head is decentralized to this Inlets of the ribs matched.
- the one in the same groove subsequent rear flank is over the insertion depth essentially parallel, but then goes into one concave fillet over so that the notch edge edges at the foot of the completely flat flank on the wall side to meet.
- the rounding goes over a quarter circle. This leads to a fairly large volume of material clearing in the base area of the output end with a certain Tendency to weaken.
- the object of the invention is a generic Screwdriver or screwdriver bit for screwdriving to design more advantageous and stable.
- the front flank has an additional curvature around the longitudinal direction with projecting radially outer section of the forehead area the flank.
- Such an embodiment is from Importance. It results from one going in the direction of work, in the most varied Way of creating torsion of the ribs. The also brings undercut radially inwards in the forehead area Flanks. So one is created for that Screw in screws far radially outwards and therefore a particularly leverage point of attack. It is also an advantage, even if the rear one Flank an additional curvature around the longitudinal direction has correspondingly falling back radially outer portion of the forehead area. Overall renders one diagonally in the corresponding Slot section of the cross slot inserting rib, which favors the clamping effect explained above.
- the Output end in the form of at least three, preferably four, ribs is profiled, which ribs from one around the center section lying radially extends radially, each have an end face, which a Has inclination to the axis of rotation, and front and form back flanks, which in that of the forehead adjacent area substantially parallel to each other run in which area the front Flank on a diametrical surface related to the axis of rotation lies, the flanks of adjacent ribs form a notch running in the longitudinal direction with one that runs into the lateral surface of a shaft section Notch reason that the two flanks in the forehead area each rib, starting from one in the immersion profile (Phillips) of the screw head entering Parallel flank section, in the axial direction from each other are curved to the ground, the beginning of the curvature in Area of the mouth of the immersion profile.
- the notch reason runs out with notch edges meeting at an acute angle, it is advantageous that the notch edges meet at an angle of approx. 40 °.
- a advantageous development of the generic screwdriver or screwdriver bit in that the distance between the tip and the start of curvature is smaller than the immersion depth of the screw head into the immersion profile. This ensures an advantageous one Edge between tool and fastener speak screw. It is favorable here that the width the rib at the level of the profile depth of the screw head immersion profile is larger than the mouth width of the Immersion profile.
- the invention brings in Proposal that the parallel flank section subsequent curvature surfaces are twisted. So The clamping effect explained above also arises here between the cross profile, i.e.
- the screw profile according to the invention is used in aviation. It is common there Use screws only once.
- the invention Profile is particularly suitable for the screws unscrew because the flanks of the ribs are no planes but curved surfaces.
- the new geometry is particularly effective when unscrewing not through the center of rotation of the tool extending flank advantageous. That this flank assigned notch edge runs back slightly to the groove base in relation to a parallel plane the rear flank of the associated rib.
- the screwdriver bit S shown is rod-shaped educated. In this respect it can also a screwdriver right away.
- the screwdriver bit S has a drive end 1 and an output end 2, also called working end.
- the drive end 1 is provided with an annular groove 3.
- the tool can be used here, for example Assign the motor screwdriver axially secured.
- the turning entrainment in a corresponding chuck is based on the non-circular, specifically hexagonal cross-sectional shape of shaft 4 of screwdriver bit S.
- the largest length section is in the latter.
- the output end 2 is approximately up to the width across flats of the hexagonal cross section and forms one predominantly cylindrical head as a stepped shank section 5 of the tool.
- the free end of the shaft section 5 goes into a cross profile 6 over. This has four ribs 7. They go one around the geometric axis of rotation x-x of the tool lying center section 8, in essential radial extension and the same Angular distance.
- the gaps between the ribs 7 of the cross profile 6 are realized as notches 9. They are asymmetrical V-notches. They are still far beyond the depth of intervention y of the cross profile 6 in the direction of the shaft 4 continues. You end up in a self-notched Base region 10 of the shaft section 5.
- the aspect ratio from base area 10 to notched zone is approximately 1: 4.
- ribs 7 are in relation to their Forehead inclined to the axis of rotation x-x- aligned.
- On Part of the forehead 11 is at least partially rib-shaped already in the frustoconical Center section 8 over.
- a cone tip 12 falls with the axis of rotation x-x together.
- the ribs 7 each form a front flank 13 and a rear flank 14, based on an insertion direction a screw 15 clockwise. In cross section seen, they run, roughly speaking, parallel to each other (see Fig. 8).
- the center offset and the same width of the ribs 7 can with the same radial distance of the notch 16 the Notches 9 flanks 13, 14 of different widths are formed.
- the front (13) are dimensioned radially shorter.
- the ratio is 1: 1.5 (see Fig. 8).
- the transition is the inner edge the uncurved flank 13 to the curved flank 14 of the Score 16.
- the flanks 13, 14 adjacent ribs 7 in approximately the penetration depth y corresponding end area of the ribs 7 in the circumferential direction curved away from each other. That draws on the outer wall side of the head and base area 10 formed shaft section 5 so that that of the front Flank 13 facing notch edge 13 'in further course going in the direction of the shaft 4 the continuously curved flanks 13 is curved over a smaller circumferential angle alpha than the notch edge 14 'which is also continuous continuously curved rear flank 14. This larger circumferential angles are denoted by beta.
- the Ratio is 1: 3.
- each notch 9 runs in the end region of the tool acute-angled to the axis of rotation x-x near the center off, of course related to an axis parallel to the room Axis of rotation x-x, defined there by the front Exit point 16 'of the notch base 16.
- the zero point the wedge-out course lies in height in the center area 8.
- the The end area of the tool is the course of the curvature of the flanks 13 and 14 and that of the notch base 16 to the extent that a slightly converging Alignment of the areas or lines exists.
- This can be an advantageous centering plus clamping effect with regard to the cross-sectional contour of a Reach cross slot 17 of screw 15.
- the corresponding one Phillips 17 is in the head 18 of the Screw 15 (see Fig. 10).
- each rib 7 has an additional Curvature, namely around the longitudinal direction of the screwdriver bit S going. That practically leads to a trough of the flank 13 and a clear one Twisting of the ribs 7. This causes the radial to jump outer section 13 '' of the forehead area in the working direction A facing edge 13 is striking.
- the Distortion angle is designated with gamma and leads peripheral to about 3 ° lead compared to that in FIG. 8 registered vertical diametrals D-D.
- the through the corresponding twist achieved additional curvature 7 is also particularly relevant to the longitudinal direction vividly.
- the mentioned section 13 '' corresponds to the contour Formation of the cross slot 17 is not diagonal Alignment against the corresponding slot counter surface, but with a protruding point of attack at a more favorable lever position.
- the rear flank 14 also has an additional, however opposite curvature around the longitudinal direction of the screwdriver bit S. Accordingly there is also a falling back radially outer one Section of the end region of the flank 14 in front, here but going inwards and also a clear one Forming trough of flank 14.
- the weakly conical shape of the central section 8 includes the ribs 7 approximately at an angle of 45 ° inclined course, approximately in the form of an imaginary one Truncated cone.
- the obtuse-angled transition between the portion of the Ribs 7 and the peripherally adjoining, frustoconical side The main area of the ribs 7 is 19 designated.
- the distance z corresponds approximately one third of the radial distance between the tip of the cone and the line of the obtuse-angled transition 19.
- the sweeping is meant on a level basis.
- notch reason 16 towards the base area 10 with those meeting at an acute angle Notch edges 13 ', 14' runs out.
- the one there Meeting point is marked with 20 and coincides with the peripheral end 16 '' of the concave notch base 16 together.
- the notch edges 13 ', 14' meet in one acute angle of about 40 ° together.
- the cross profile 6 can be in the manner shown generate advantageous in the rotary manufacturing process.
- the corresponding profiler is through the DE patent 19 21 514 known and is here full content included, also for the purpose, characteristics of these documents to include in claims of the present application.
- the screwdriver bit shown in Figures 11 to 15 is with regard to the flank geometry trained.
- the design features relating to the basic principle correspond to those of the basic version the screwdriver bit S or screwdriver, for whatever reason the reference symbols are analogous are used, some without repetitions.
- the structure is now such that the two flanks 13, 14 in the forehead area of each rib 7, starting from one in the immersion profile speak cross recess 17 of Screw head 18 entering parallel flank section 7a curved in the axial direction pointing away from each other are.
- the beginning of the curvature of the rib 7 is 7b designated. It can be a continuous one Connection to the curved parts of the flanks 13, 14 act or a trapezoidal flank section 7c.
- the wider base of the trapezoidal flank section 7c faces the shaft section 5 of the tool.
- the angles of the trapezoidal flanks can be steeper at 13 than at 14.
- the start of the curvature lies in the plug connection with the screw 15 7b in the area of the mouth 21 of the immersion profile of the screw head 18, compare FIG. 15.
- the corresponding taper towards the cone tip 12 of the trapezoidal flank section 7c and the same in the same width as the head subsequent parallel flank section 7a favor the pin assignment due to the initial larger game and then the rich takeaway in the Area of mouth 21.
- the cone tip 12 stands from the base 22 of the plug-in profile, the Phillips 17 so from.
- the ratios are such that the distance between the tip of the cone 12 and the start of curvature 7b is smaller than the immersion depth T in the immersion profile of the screw head 18th
- a reference plane E-E is therefore placed in FIG. which is the main region on the frustum wall side corresponds to the ribs 7 and is designated 19. Accordingly, the subject is geometric according to further training formed so that the flanks of the parallel flank section 7a lie on an axial length J1.
- the flanks of the trapezoidal flank section run only after the length J1 7c to that shown in the drawing defined length J2, under two cutter head infeed angles except for a width F2 (cf. Figure 12).
- the corresponding cutter head infeed angle are given in Figures 13 and 14.
- the latter goes out of the line of the Score 16 out.
- the width F2 of the rib 7 is at the level of the profile depth T of the screw head immersion profile larger than that of the immersion profile.
- Edges of the flanks 13 lie in the illustrated Four ribs mainly in a common diametral D-D. Which also on this front flank 13 steeper curvature or trapezoidal flank course results from a comparison of the angles entered in FIG. 11, the Values are given there.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Tires In General (AREA)
Description
- Fig. 1
- einen erfindungsgemäß ausgebildeten Schraubendrehereinsatz in Seitenansicht, vergrößert,
- Fig. 2
- einen Schraubendrehereinsatz gemäß Stand der Technik, ebenfalls in Seitenansicht sowie vergrößert,
- Fig. 3
- das weiter vergrößerte Abtriebsende des Schraubendrehereinsatzes nach Fig. 1,
- Fig. 4
- die Draufsicht auf Fig. 3,
- Fig. 5
- das weiter vergrößerte Abtriebsende des Schraubendrehereinsatzes gemäß Fig. 2,
- Fig. 6
- die Draufsicht auf Fig. 5,
- Fig. 7
- das Abtriebsende des erfindungsgemäßen Schraubendrehereinsatzes in noch weiterer Vergrößerung,
- Fig. 8
- die Draufsicht auf Fig. 7,
- Fig. 9
- eine zugehörige Schraube in Seitenansicht, vergrößert,
- Fig. 10
- die Draufsicht auf diese Schraube,
- Fig. 11
- einen Schraubendrehereinsatz in Seitenansicht, vergrößert, eine Weiterbildung darstellend,
- Fig. 12
- die Draufsicht auf Figur 11,
- Fig. 13
- den Schnitt gemäß Linie XIII-XIII in Figur 12,
- Fig. 14
- den Schnitt gemäß Linie XIV-XIV in Figur 13 und
- Fig. 15
- einen Schnitt durch eine Schraube bei einstekkender Rippe des Schraubendrehers.
Claims (11)
- Schraubendreher oder Schraubendrehereinsatz (S) mit einem Antriebs-, einem Abtriebsende (1 bzw. 2) und einem dazwischenliegenden Schaft (4), wobei das Abtriebsende in Form von mindestens drei, bevorzugt vier, Rippen (7) profiliert ist, welche Rippen (7) von einem um die Drehachse (x-x) liegenden Zentrumsabschnitt (8) radial ausgehen, jeweils endseitig eine Stirn besitzen, welche eine Neigung zur Drehachse besitzt, und vorderseitige und rückseitige Flanken (13 bzw. 14) ausbilden, welche in dem der Stirn (11) benachbarten Bereich im wesentlichen parallel zueinander verlaufen, in welchem Bereich die vorderseitige Flanke (13) auf einer auf die Drehachse (x-x) bezogenen Diametralfläche (Diametrale D-D) liegt, wobei die Flanken (13,14) benachbarter Rippen (7) eine in Längsrichtung verlaufende Kerbe (9) ausbilden mit einem in die Mantelfläche eines Schaftabschnitts auslaufenden Kerbgrund (16), dadurch gekennzeichnet, daß die beiden Flanken (13,14) ausgehend von der Randkante der Stirn (11) jeder Rippe (7) voneinander wegweisend gekrümmt sind, wobei die vorderseitige Flanke (13) eine Krümmung um die Längsrichtung besitzt mit vorspringendem, radial äußerem Abschnitt (13'') des Stirnbereichs der Flanke (13).
- Schraubendreher oder Schraubendrehereinsatz (S) mit einem Antriebs-, einem Abtriebsende (1 bzw. 2) und einem dazwischenliegenden Schaft (4), wobei das Abtriebsende in Form von mindestens drei, bevorzugt vier, Rippen (7) profiliert ist, welche Rippen (7) von einem um die Drehachse (x-x) liegenden Zentrumsabschnitt (8) radial ausgehen, jeweils endseitig eine Stirn besitzen, welche eine Neigung zur Drehachse besitzt, und vorderseitige und rückwärtige Flanken (13 bzw. 14) ausbilden, welche in dem der Stirn (11) benachbarten Bereich im wesentlichen parallel zueinander verlaufen, in welchem Bereich die vorderseitige Flanke (13) auf einer auf die Drehachse (x-x) bezogenen Diametralfläche (Diametrale D-D) liegt, wobei die Flanken (13, 14) benachbarter Rippen (7) eine in Längsrichtung verlaufende Kerbe (9) ausbilden mit einem in die Mantelfläche eines Schaftabschnitts auslaufenden Kerbgrund (16), dadurch gekennzeichnet, daß die beiden Flanken (13, 14) jeder Rippe derart voneinander wegweisend gekrümmt sind, daß die der vorderseitigen Flanke (13) zugewandte Kerbenrandkante (13') im weiteren Verlauf der gekrümmten Flanke (13) in Achsrichtung hin zum Kerbgrund über einen geringeren Umfangswinkel (Alpha) gekrümmt ist, als die Kerbenrandkante (14') der rückwärtigen Flanke (14).
- Schraubendreher oder Schraubendrehereinsatz nach Anspruch 1, dadurch gekennzeichnet, daß die der vorderseitigen Flanke (13) zugewandte Kerbenrandkante (13') im weiteren Verlauf des kontinuierlich gekrümmten Flankenabschnittes (13) über einen geringen Umfangswinkel (Alpha) gekrümmt ist, als die Kerbenrandkante (14') der rückwärtigen Flanke (14).
- Schraubendreher oder Schraubendrehereinsatz nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die vorderseitige Flanke (13) eine zusätzliche Krümmung um die Längsrichtung besitzt mit vorspringendem, radial äußerem Abschnitt (13") des Stirnbereichs der Flanke (13).
- Schraubendreher oder Schraubendrehereinsatz nach Anspruch 1,3 oder 4, dadurch gekennzeichnet, daß die rückwärtige Flanke (14) eine zusätzliche Krümmung um die Längsrichtung besitzt mit zurückfallendem radial äußeren Abschnitt des Stirnbereichs der Flanke (14).
- Schraubendreher oder Schraubendrehereinsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Flanken (13, 14) im Stirnbereich jeder Rippe (7), ausgehend von einem in das Eintauchprofil (17) eines Schraubenkopfes (18) einer Schraube (14) eintretenden, sich unmittelbar an die Stirnrandkante anschließenden Parallelflankenabschnitt (7a) in Achsrichtung voneinander wegweisend gekrümmt sind, wobei der Krümmungsbeginn (7b) im Bereich der Mündung (21) des Eintauchprofiles liegt.
- Schraubendreher oder Schraubendrehereinsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kerbgrund (16) einer jeden Kerbe (9) im Stirnbereich spitzwinklig zur Drehachse (x-x) geneigt ist.
- Schraubendreher oder Schraubendrehereinsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stirn (11) der Flanken (13, 14) Flächenabschnitte eines gedachten Kegelstumpfmantels ausbildet.
- Schraubendreher oder Schraubendrehereinsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die gedachte Verlängerung der Axialprojektion jedes Kerbgrundes (16) mit Abstand (z) an der Drehachse (x-x) vorbeiläuft.
- Schraubendreher oder Schraubendrehereinsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kerbgrund (16) mit spitzwinklig zusammentreffenden Kerbrändern (13', 14') ausläuft.
- Schraubendreher oder Schraubendrehereinsatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Kerbränder (13', 14') etwa in einem Winkel von 40° zusammentreffen.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29621122 | 1996-12-05 | ||
DE29621122U | 1996-12-05 | ||
DE29715772U | 1997-09-03 | ||
DE29715772U DE29715772U1 (de) | 1996-12-05 | 1997-09-03 | Schraubendreher oder Schraubendrehereinsatz |
PCT/EP1997/006661 WO1998024597A1 (de) | 1996-12-05 | 1997-11-29 | Schraubendreher oder schraubendrehereinsatz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0942807A1 EP0942807A1 (de) | 1999-09-22 |
EP0942807B1 true EP0942807B1 (de) | 2000-08-23 |
Family
ID=26059710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97952010A Expired - Lifetime EP0942807B1 (de) | 1996-12-05 | 1997-11-29 | Schraubendreher oder schraubendrehereinsatz |
Country Status (4)
Country | Link |
---|---|
US (1) | US6520055B1 (de) |
EP (1) | EP0942807B1 (de) |
CN (1) | CN1073000C (de) |
WO (1) | WO1998024597A1 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7690282B2 (en) * | 2005-08-03 | 2010-04-06 | Synthes Usa, Llc | Screw-retaining screwdriver |
US8418587B2 (en) | 2008-11-07 | 2013-04-16 | Milwaukee Electric Tool Corporation | Tool bit |
USD623036S1 (en) | 2008-11-07 | 2010-09-07 | Milwaukee Electric Tool Corporation | Insert bit |
USD711719S1 (en) | 2009-11-06 | 2014-08-26 | Milwaukee Electric Tool Corporation | Tool bit |
USD619152S1 (en) | 2009-12-18 | 2010-07-06 | Techtronic Power Tools Technology Limited | Adapter |
USD623034S1 (en) * | 2009-12-18 | 2010-09-07 | Techtronic Power Tools Technology Limited | Tool arbor |
USD651062S1 (en) | 2010-09-29 | 2011-12-27 | Milwaukee Electric Tool Corporation | Tool interface for an accessory |
USD646542S1 (en) | 2010-09-29 | 2011-10-11 | Milwaukee Electric Tool Corporation | Accessory interface for a tool |
USD653523S1 (en) | 2010-09-29 | 2012-02-07 | Milwaukee Electric Tool Corporation | Adapter for a tool |
US9010223B2 (en) * | 2013-02-06 | 2015-04-21 | New Way Tools Co., Ltd. | Tool bit |
US9555554B2 (en) | 2013-05-06 | 2017-01-31 | Milwaukee Electric Tool Corporation | Oscillating multi-tool system |
US10022845B2 (en) | 2014-01-16 | 2018-07-17 | Milwaukee Electric Tool Corporation | Tool bit |
US10780559B2 (en) * | 2017-04-25 | 2020-09-22 | William Norton | Helical toothed driver and compatible fastener |
USD821842S1 (en) * | 2017-05-16 | 2018-07-03 | Shao-Hsien HSU | Tool bit |
US11059162B2 (en) | 2017-05-17 | 2021-07-13 | Milwaukee Electric Tool Corporation | Screwdriver |
USD855433S1 (en) | 2017-08-09 | 2019-08-06 | Milwaukee Electric Tool Corporation | Screwdriver |
WO2019109098A1 (en) | 2017-12-01 | 2019-06-06 | Milwaukee Electric Tool Corporation | Wear resistant tool bit |
USD897806S1 (en) * | 2018-04-30 | 2020-10-06 | William Norton | Driver |
USD921468S1 (en) | 2018-08-10 | 2021-06-08 | Milwaukee Electric Tool Corporation | Driver bit |
USD880545S1 (en) * | 2019-08-21 | 2020-04-07 | Ali Industries, Inc. | Hex arbor |
USD884755S1 (en) * | 2019-08-16 | 2020-05-19 | Ali Industries, Inc. | Hex driver flap wheel sander |
TWI704982B (zh) * | 2019-12-03 | 2020-09-21 | 鴻安國際興業有限公司 | 具有防滑功能的驅動工具 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE195189C (de) * | ||||
NL42923C (de) * | 1934-07-03 | |||
USRE24878E (en) * | 1955-03-16 | 1960-09-27 | Socketed screw head with uniformly offset grooves | |
US2848024A (en) * | 1958-04-18 | 1958-08-19 | Ian A Smith | Screw driver with offset wings |
US3025896A (en) * | 1958-06-26 | 1962-03-20 | Phillips Screw Co | Tools for recessed head fastener with oblique recess |
FR1213166A (fr) * | 1958-11-05 | 1960-03-29 | Guest Keen & Nettlefolds Ltd | Perfectionnements apportés aux tournevis |
US3037539A (en) * | 1959-11-17 | 1962-06-05 | Aer O Torq Inc | Driving tool for recessed head screws |
US3234982A (en) | 1963-06-24 | 1966-02-15 | Gardner Denver Co | Driver for recessed head fasteners |
DE1921514C3 (de) | 1969-04-26 | 1981-02-05 | Hermann Werner Gmbh & Co, 5600 Wuppertal | Werkzeugmaschine zum Einfräsen mehrerer Längsnuten |
US4187892A (en) * | 1974-09-12 | 1980-02-12 | Phillips Screw Company | Recessed screw heads and drivers |
US4998454A (en) * | 1988-11-14 | 1991-03-12 | Black & Decker Inc. | Screwdriver bit for phillips-head fasteners |
-
1997
- 1997-11-29 CN CN97181490A patent/CN1073000C/zh not_active Expired - Fee Related
- 1997-11-29 US US09/319,523 patent/US6520055B1/en not_active Expired - Lifetime
- 1997-11-29 EP EP97952010A patent/EP0942807B1/de not_active Expired - Lifetime
- 1997-11-29 WO PCT/EP1997/006661 patent/WO1998024597A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
CN1245454A (zh) | 2000-02-23 |
WO1998024597A1 (de) | 1998-06-11 |
CN1073000C (zh) | 2001-10-17 |
US6520055B1 (en) | 2003-02-18 |
EP0942807A1 (de) | 1999-09-22 |
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