EP0290260B1 - Handwerkszeug - Google Patents

Handwerkszeug Download PDF

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Publication number
EP0290260B1
EP0290260B1 EP19880304086 EP88304086A EP0290260B1 EP 0290260 B1 EP0290260 B1 EP 0290260B1 EP 19880304086 EP19880304086 EP 19880304086 EP 88304086 A EP88304086 A EP 88304086A EP 0290260 B1 EP0290260 B1 EP 0290260B1
Authority
EP
European Patent Office
Prior art keywords
lever
aperture
tool
knob
selector
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
Application number
EP19880304086
Other languages
English (en)
French (fr)
Other versions
EP0290260A2 (de
EP0290260A3 (en
Inventor
James Jeromson Jr.
J. Edward C. Anderson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stride Tool Inc
Original Assignee
Stride Tool Inc
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
Application filed by Stride Tool Inc filed Critical Stride Tool Inc
Publication of EP0290260A2 publication Critical patent/EP0290260A2/de
Publication of EP0290260A3 publication Critical patent/EP0290260A3/en
Application granted granted Critical
Publication of EP0290260B1 publication Critical patent/EP0290260B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/20—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same inserting or withdrawing split pins or circlips
    • B25B27/205—Pliers or tweezer type tools with tow actuated jaws
    • 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
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06—Joints
    • B25B7/10—Joints with adjustable fulcrum

Definitions

  • This invention relates to a hand tool of the type used for expansion and/or contraction of differing types of deformable members, cf. GB-A-1 334 877 corresponding to the preamble of claim 1.
  • Snap or retaining rings are either "internal” or “external”.
  • the internal type of retaining ring is used to retain elements such as bearings or shafts, within a bore. In order to install the ring it is contracted to allow it to pass into the bore, and then allowed to expand for engagement with an internal groove formed around the bore.
  • the external type of retaining ring is used to retain elements such as bearings, gears or pulleys on shafts.
  • An external ring normally engages an annular groove formed in a shaft to inhibit axial movement of an element mounted on the shaft.
  • An external ring is generally installed by expanding the ring until its internal diameter is greater than the shaft diameter.
  • a tool for installing and removing external rings for example, must expand the rings to increase its internal diameter in order to accommodate the shaft.
  • An internal ring installation and removal tool must contract the ring in order to decrease its external diameter to enable the ring to pass through a bore. Since the function and performance required of such tools is so substantially different, retaining ring pliers are often supplied as single purpose “internal” and "external” tools. These single purpose pliers are intended for use only in installing or removing one type of retaining ring, and both types of pliers are therefore required in order to install or remove both external and internal types of retaining rings.
  • the tool includes a pair of pivotally interconnected handles and a pair of jaw members coupled to the handles by a latching mechanism having two transversely slidable latch members. In one position, the latch members are positioned to allow one handle member to be coupled to one jaw member and the other handle to be coupled to the other jaw member. Upon transversely sliding the latch members to a second position, the one handle is coupled to the other jaw member and the other handle is coupled to the one jaw member. While the construction of the referenced patent has enjoyed great success, it is relatively complex and it contains numerous parts which must be properly assembled and aligned during operation to provide proper functioning.
  • a plier is provided whereby separate pairs of jaws and handles are pivotally interconnected about a common axis and are arranged such that a pair of movable pins is adapted to alternately engage the jaw and handle pairs to shift the jaw and handle interconnections from an internal position to an external position and visa versa.
  • An additional form of plier construction provides interconnected levers having two jaw members for simultaneous operation of the tool on internal and external retaining rings by a pair of jaws positioned for internal operation and a pair of jaws for external operation.
  • Another convertible plier construction utilizes linkages that must be disengaged and the tool reassembled in order to change the relationship between the handles and jaws. Such a construction is cumbersome to use as it requires unneeded preparation time prior to use, and may alter the configuration of the tool such that it becomes uncomfortable to use. In addition at least some such tools have significantly different mechanical advantages in the internal and external positions.
  • a plier tool comprising first and second levers each including a handle portion, a jaw portion, a boss portion interconnecting the handle and jaw portions, and coupling means for coupling together said levers and maintaining the boss portions in sliding, juxtaposed relationship, said coupling means including a pivot which is located at a fixed position on the first lever thereby defining a first rotation axis, and which is accommodated in an aperture in the boss portion of the second lever, the second lever being selectively movable relative to the pivot between a first working position in which the jaw portions of the two levers have a crossed relationship and a second working position in which said jaw portions have a side by side relationship, the tool including position locating means constructed such that when the tool is used in at least one of the working positions reaction forces occasioned by work operation apply position retention force to the locating means to maintain the levers in the one working position.
  • the pivot is threadedly engaged with the boss portion of the first lever and the aperture in the second lever is U-shaped to accommodate the eccentric action.
  • the head of the pivot bears on the boss of the second lever to maintain the boss portions in sliding juxtaposed relationship.
  • the pivot and end walls defining the slot coact to provide the locating means.
  • the improved tool of the present invention is characterized in that the coupling means includes a work position selector coupled to the first lever by means of the pivot for relative rotation about the first rotation axis, and having means for coupling the selector to the second lever for relative rotation about a second rotation axis, said first and second rotation axes being parallel but non-coincident, whereby rotation of the selector about the second axis produces an eccentric action shifting the levers between the first and second working positions.
  • the present invention provides a new and improved hand tool for removing and installing internal and external retaining rings.
  • the tool includes two levers permanently connected together which nonetheless may be easily switched between internal and external operating positions.
  • reaction forces resulting from a work operation apply a position retention force to maintain the levers in a selected relationship while a work operation is performed.
  • the tool comprises right and left operating levers pivotally interconnected together with driving structure for shifting the levers between tool operating positions.
  • Each of the levers includes a jaw portion, a handle portion and a boss portion intermediate the jaw and handle portions.
  • the interconnection of the levers and position of the jaw and handle portions of the levers is configured in a side by side relationship during operation of the tool in the external position.
  • both the jaw and handle portions of the one lever operate on one side of an imaginary centre line which bisects the tool, while the jaw and handle portions of the other lever are on the other side of the centre line.
  • the portions are crossed such that the jaw and handle portions of the one lever operate on opposite sides of the centre line, and the jaw and handle portions of the other lever are also opposite one another relative to the centre line.
  • one lever and the driving structure which comprises a driving knob, are coupled together so that the other lever moves relative to the one lever and driving knob.
  • the levers are crossed.
  • the driving knob is manually rotated to shift the levers for operation in the internal position, the levers move to opposite sides of the centre line in side by side relationship.
  • the tool is configured to provide a movable relationship between the levers for internal and external positioning, there is no requirement that discrete handle members and jaw members be selectively interconnected for being reversibly coupled to one another.
  • the present invention instead provides that the levers are shiftable between positions.
  • a driving knob couples the levers.
  • the knob includes a handle portion, a lever engagement portion and a base portion disposed in a circular recess in the second lever.
  • a pivot connects that base portion to the first lever in eccentric relationship.
  • the base portion includes an arcuate groove which is concentric with the base portion.
  • the second lever includes a projection which extends into the groove in a work position orientation relationship.
  • the handle portion of the knob is manually rotated to cause eccentric relative lever movement so that one jaw tip passes over the other.
  • the projection travels within the knob groove following the arcuate path of the groove over an arc of 180° or more.
  • the levers move from one of internal and external positions to the other arriving in the other position upon the projection reaching the other end of the path.
  • the guiding portion acts as a stop member which stops rotation of the tool in the proper operating position.
  • one lever is coupled with a driving knob at a driving connection.
  • the other lever is moveable relative to the one lever and knob.
  • the driving knob is used as in the first embodiment, in that manual rotation of the knob shifts the levers between an external position to opposite sides of the centre line in their side by side relationship and a crossed internal ring relationship.
  • the driving knob of this embodiment comprises a drawn cup-shaped member having an annular side wall, a bottom portion supporting the knob on the one lever, and a cap member engaged with the annular wall and supported within the cup member.
  • a pivot connection secures the knob and levers together in eccentric relationship.
  • the second lever includes an arcuate groove for engagement with the driving connection in a work position establishing relationship, and a recessed aperture for engagement with the driving connection while providing a flush working relationship with respect to the first lever. Movement of the knob results in eccentric relative lever movement so that one jaw tip passes over the other. As the knob is rotated, the driving connection travels within the groove following the arcuate path of the groove over an arc of 180° or more. The levers thus move from one position, and arrive at the other position when the driving connection reaches the other end of the arcuate path. Upon contacting the other end of the groove, the driving connection serves as a stop member for stopping rotation of the tool in the proper operating position.
  • reaction forces maintain the tool in at least one of its adjusted positions.
  • the arcuate groove is in excess of 180° in length, the projection passes over centre and the reaction forces urge the projection against the appropriate end of the groove when in its external ring position.
  • the pivot is forced against surfaces of the appropriate one of the stop locations in both positions.
  • the tool of the present invention preferably includes a spring interposed between the lever handle portions for biasing the handles away from one another.
  • the device includes a locking lever arm pivotally mounted on the handle portion of the one lever.
  • the lever arm is positioned to lockingly engage a notched portion in the boss portion of the other lever.
  • the notched portion is configured to engage and maintain the lever arm whereby the tool remains in the locked and closed position against the bias of the spring.
  • a raised stop limit on the other lever is also used to limit the farthest handle position when the tool is in the internal position.
  • the stop limit engages the boss portion of the one lever to prevent handle movement past a maximum open position.
  • a hand tool A is adapted for expanding or contracting resilient members in an internal or external mode of operation.
  • the tool A includes a pair of lever sections 10, 12 each having a handle portion 14, covered by plastic grip covers 15, as in Figure 10.
  • the lever sections are pivotally interconnected for normally permanent but relatively movable action about a pivot pin in the form of a threaded fastener 16.
  • each lever section 10, 12 includes a jaw portion 18 having a forwardly projecting tip 20, and a boss portion 22. As shown in Figures 2 and 3, both tips 20 are integral with the lever section, but removable tips may be provided.
  • the boss portion 22 is positioned intermediate the handle and jaw portions 14, 18.
  • the lever sections 10, 12 are interconnected through their respective boss portions 22 by the pivot pin 16.
  • the tool A is manipulated between operating modes by a shifting or driving structure 28 which permits movement of the lever sections 10, 12 between the external position, when the lever sections are in a side by side relationship, Figure 10, and the internal position, in which the lever sections are in a crossed relationship, Figures 1, 6.
  • the lever sections 10, 12 and their associated tips 20 are positioned next to one another. Squeezing the handle portions 14 causes the jaw portions 18 and tips 20 to separate and assume the open position as indicated by the phantom line tool view. The outward movement of the tips 20 to this position enables the jaw portions 18 to expand an external retaining ring.
  • the tool A By manipulating the shifting or driving structure 28, the tool A is selectively moved to the internal mode of operation as shown in Figures 1 and 6.
  • the tool illustrated in Figure 6 is described as being in the open position. In this position, the handles are released or biased by the spring 24, and the jaw portions and their associated tips are located away from one another.
  • the handle portions 14 are squeezed towards one another, the jaw portions 18 and their associated tips 20 are moved towards one another to the closed position as shown in Figure 1.
  • the shift permitting structure includes a driving knob 30.
  • the driving knob 30, as shown in Figures 7-9, includes a base portion 32, a handle portion 34 and an engagement portion 36.
  • the engagement portion 36 has a cylindrical surface sized for interacting engagement with walls defining a circular recess or driving aperture 37 in one lever section.
  • the pivot 16 is interconnected with the knob base portion 32 to couple the knob 30 to the lever section 12.
  • the attachment aperture 31, through which the pivot pin projects, is offset such that the knob 30 is connected in an eccentric relationship.
  • the position of the attachment aperture and thus of the pivot 16 is preferably based on correct tip 22 alignment, and is obtained by appropriately sizing the radius of the engagement portion 36 and interconnecting circular recess 37.
  • a spring washer 16A is positioned intermediate ahead of the pivot pin 16 and the boss portion 22 of the lever section 12 to provide stability to the tool, and also provide friction forces which prevent the knob 30 from unintentionally rotating with respect to the lever section.
  • the distance the engagement portion projects into the aperture 37 is substantially less than or equal to the width of the lever section 10. The height of the engagement portion is necessarily limited so as to avoid interference with the lever section 12 which abuts the lever section 10 as shown in Figure 2.
  • reaction forces resulting from working operation of the tool apply a position retention force maintaining the tool levers in the selected position during operation.
  • a hand force and an internal retaining ring force operating on the tool result in a reaction force which biases the knob in a direction out of its proper operating position.
  • Frictional retention forces provided by the spring washer 16A act against the reaction force to retain the knob and levers in their proper operating position.
  • the guiding engagement structure 38 limits lever rotation through operating engagement with an arcuate groove 33 in the base portion 32 of the knob 30.
  • the guiding engagement structure 38 comprises a guide post 39 projecting from the boss portion of lever section 10. During manipulation of the tool between internal and external positions, the guide post 39 engages the arcuate groove 33. Movable engagement of the guide post 39 within the groove 33 is permitted, since the height and diameter of the guide post 39 are proportionate to the depth and width of the arcuate groove 33.
  • the lever section 12 moves in eccentric relation, with the guide post moving within the arcuate groove 33 until the tool is positioned in internal and external operating modes when the guide post engages the ends 40, 41 of the groove 33.
  • the guide post 39 performs as a stop member which stops rotation of the tool in the internal or external operating position upon reaching the end of the groove corresponding to the selected position.
  • the tool is in the internal position when the post 39 contacts the end of the groove 41, as shown in Figure 1, and is in the external position when the post 39 contacts groove end 40.
  • the radius of the arcuate groove 33 is transverse to the central axis of the knob and extends, as shown in Figure 7, more than 180° about the perimeter of the base portion 32.
  • eccentric movement of lever section 12 is permitted between the crossed relationship in the internal position, and the side by side relationship in the external position, whereby the jaw portion and tip of lever section 12 pass under the jaw and tip of lever section 10 without interference.
  • Knob rotation of more than 180° is preferable in order to obtain a path of non-interfering travel between tips 20 having degrees of angulation of the type shown on the tool in Figure 2.
  • the hand tool A′ illustrated in Figure 11 includes a pair of lever sections 10′, 12′ each having a handle portion 14', covered by plastic grip covers 15′.
  • the lever sections are pivotally interconnected about a driving connection 90, which couples the lever sections 10′, 12′ and a driving knob 30′.
  • the driving connection 90 is in the form of a rivet joint 94. Jaw portions 18′ having tips 20′, and boss portions 22′, are also included as in the prior embodiment.
  • the knob 30′ and lever sections 10′, 12′ are connected by the rivet joint 94 through respective aligned apertures 95, 96, and 97.
  • the tool A′ is manipulated between positions by rotation of the driving knob 30′.
  • the lever sections move between internal and external positions in their side-by side relationship as described with respect to the above embodiment. Movement between positions is provided by a driving structure 28′ which includes a pivot connection 100 and the driving connection 90.
  • the pivot connection 100 interconnects the one lever section 10′ with the driving knob 30′ so that the other lever section 12′ moves relative to the one lever section and knob.
  • the pivot and driving connections 100, 90 are best illustrated in Figure 14.
  • the pivot connection 100 includes a rivet 101 which engages the knob 30 and one lever section 10′ through respective aligned apertures 102, 103.
  • Both the driving and pivot connection rivets 94 and 101 which may include spring washers (not illustrated) similar to that shown in Figure 2 for providing stability to the tool, preventing unintentional tool movement, and maintaining the tool in the selected operating position.
  • the rivet 101 includes a countersunk head portion 104 for engagement with a recessed portion 106 of the aperture 103 in the one lever section 10′, so that the one lever section 10′ and pivot connection 100 are flush with respect to the one lever section 10′, as shown in Figure 14, to avoid interference with the lever section 12' which abuts the one lever section and rivet 101.
  • the driving knob 30' of this embodiment comprises a drawn cup-shaped member 108 having an annular side wall 110 with an outer knurled finger-engaging surface 111, a bottom portion 112 with an inner surface 114 and an outer surface 116 for engaging the one lever section 10'.
  • the driving knob 30' also includes a cap member 118 having a plurality of finger portions 120 for engaging with the annular side wall 110 to support and secure the cap member 118 within the cup member.
  • the one lever section 10' further includes an arcuate aperture or groove 122 for engagement with the driving connection 90 in a work position establishing relationship. Movement of the tool between positions is thus provided by manual rotation of the knob which moves the driving connection along the aperture 122 over an arc of 180° or more.
  • the other lever section 12' moves in eccentric relation with respect to the interconnected knob 30' and one lever section 10'.
  • the levers 10', 12' thus move from one position, and arrive at the other position when the driving connection reaches the other end of the groove.
  • the rivet 94 serves as a stop member for stopping rotation of the tool in the selected operating position.
  • the tool preferably includes a biasing spring 24, 24' which urges the handles apart.
  • the spring 24, 24' is interconnected with the handle portions of the lever sections 10, 12 and 10', 12' by spring mounts 26, 26'.
  • a locking mechanism for locking the handles in a closed position to inhibit their separation.
  • the mechanism includes a pivotally mounted locking lever 56 secured to the handle portion 14 of the lever section 10 by a pivot 57 projecting through a lock aperture 66 in the lock lever.
  • the lever is pivotable between lock and unlock positions, and is generally configured to minimize tool interference disengagement from the lock position upon movement or contact with other items during storage.
  • the lever 56 includes a spring engagement surface for engaging the spring when in a locked position.
  • the lever 56 also includes a latch portion 60 engageable with a notched portion 62 formed on the periphery of the boss portion 22 of lever section 12 as shown in Figure 1.
  • the lever further includes a finger engaging portion 64 which extends from the lever 56 and overlies the outside edge of the handle 14.
  • the finger portion 64 provides for ease of manual pivoting of the lever in and out of the lock position. It should be apparent that when the handles are squeezed and the latch portion 60 is disengaged from the notch portion 62, the spring 24 pivotally biases the lever out of engagement with the lever section 12 along the spring engagement surface.
  • a stop limit 130 raised from one surface of the second lever section 12', is used to limit the internal ring tool handle position to a maximum open position. As shown in Figure 12, the stop limit abuts the boss portion 22' to limit the opening of the spring biased handle portions 14' to a maximum open position.
  • the present invention thus provides an inexpensive tool for the expansion and contraction of resilient retaining members.
  • the tool is easily switched between the internal and external operating modes by merely manipulating the shifting or driving structure 28.
  • lever sections of the tool illustrated are constructed from stampings, the making of which is known by those skilled in the art. It should also be recognized that other relatively inexpensive methods of manufacture could be used to produce the disclosed tool components, such as using powdered metal technology.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Claims (13)

  1. Zangenwerkzeug umfassend: erste und Zweite Hebel (12, 10; 12', 10') mit jeweils einem Handgriffteil (14; 14'), einem Backenteil (18; 18'), einem Nabenteil (22; 22'), das die Handgriffund Backenteile verbindet, und Kupplungsmittel zum Verbinden der Hebel und zum Halten der Nabenteile in gleitender aneinander angrenzender Beziehung, wobei die Kupplungsmittel ein Drehlager (16; 90) enthalten, das in einer festen Position an dem ersten Hebel (12; 12') angeordnet ist und dadurch eine erste Drehachse bildet, und das in eine Öffnung (37, 122) in dem Nabenteil des zweiten Hebels eingepaßt ist, wobei der zweite Hebel (10; 10') wahlweise relativ zu dem Drehlager zwischen einer ersten Arbeitsposition, in der die Backenteile (18; 18') der beiden Hebel (12, 10; 12', 10') eine einander kreuzende Beziehung haben, und einer zweiten Arbeitsposition bewegbar sind, in der die beiden Backenteile eine nebeneinanderliegende Beziehung haben, wobei das Werkzeug ferner Positionslokalisierungsmittel (33; 122) aufweist, die so ausgebildet sind, daß bei Verwendung des Werkzeugs in wenigstens einer der Arbeitspositionen durch die Arbeitsoperation verursachte Reaktionskräfte den Lokalisierungsmitteln (33; 122) eine Positions-Haltekraft zuführen, um die Hebel in der einen Arbeitsposition zu halten, dadurch gekennzeichnet, daß die Kupplungsmittel einen Arbeitspositionswähler (30; 30') enthalten, der mit dem ersten Hebel (12; 12') mittels des Drehlagers (16; 90) für eine relative Drehung um die erste Drehachse verbunden ist, und daß Mittel (36; 100) zur Verbindung des Wählers mit dem zweiten Hebel (10, 10') zur relativen Drehung um eine zweite Drehachse vorgesehen sind, daß die erste Drehachse zu der zweiten Drehachse parallel ist aber nicht mit dieser zusammenfällt, wobei die Drehung des Wählers (30; 30') um die zweite Achse eine exzentrische Wirkung erzeugt, die die Hebel (12, 10; 12', 10') zwischen der ersten und zweiten Arbeitsposition verschiebt.
  2. Werkzeug nach Anspruch 1, bei dem die Öffnung (37) kreisförmig und auf die zweite Achse zentriert ist, und wobei der Wähler (30) ein Eingriffsteil (36) mit einer äußeren zylindrischen Fläche hat, die komplementär mit den die Öffnung bildenden Wänden zusammenwirkt, um die relative Drehung zwischen dem Wähler und dem zweiten Hebel zuzulassen.
  3. Werkzeug nach Anspruch 2, bei dem der Wähler ein Knopf (30) ist, der ein Handgriffteil (34), das Eingriffsteil (36) und ein Basisteil (32) zwischen dem Handgriff- und dem Eingriffsteil umfaßt, wobei das Eingriffsteil einschließlich der äußeren zylindrischen Fläche in Gleiteingriff mit den Wänden der Öffnung (37) ist.
  4. Werkzeug nach Anspruch 3, bei dem das Basisteil einen Flansch (32) umfaßt, der sich seitlich über die Öffnung (37) hinaus erstreckt, um die Hebel mit ihren Nabenteilen in Berührung aber relativ zueinander verschiebbar und drehbar zu halten.
  5. Werkzeug nach Anspruch 3 oder 4, bei dem ein Führungsstift (39) entweder von dem zweiten Hebel (10) oder dem Knopf (30) vorsteht und eine Rille (30) korrespondierend entweder in dem zweiten Hebel oder dem Knopf vorgesehen ist, wobei der Führungsstift und die Rille in Betrieb miteinander in Eingriff sind, um die Drehung zwischen dem Knopf und dem zweiten Hebel zu begrenzen.
  6. Werkzeug nach Anspruch 5, bei dem die Rille (33) in dem Basisteil (32) angeordnet ist, wobei der Führungsstift (39) von dem Nabenteil (22) des zweiten Hebels vorsteht.
  7. Werkzeug nach einem der Ansprüche 1 bis 4, bei dem der Wähler (30, 30') und einer der Hebel zusammenwirkende Elemente (33, 39, 90, 122) haben, die betrieblich in Eingriff zu bringen sind, um die Drehung zwischen dem Wähler und dem einen Hebel zu begrenzen.
  8. Werkzeug nach Anspruch 7, bei dem die Öffnung (122) in Anpassung an die exzentrische Aktion gekrümmt ist, und bei dem das Drehlager (90) in Berührung mit entsprechenden Enden der gekrümmten Öffnung (122) gebracht wird, wenn die Hebel sich in der ersten oder zweiten Arbeitsposition befinden, um dadurch die Drehung des Wählers relativ zu dem zweiten Hebel zu begrenzen.
  9. Werkzeug nach Anspruch 8, bei dem die Mittel zur Verbindung des Wählers mit dem zweiten Hebel einen Stift (101) enthalten, der sich entlang der zweiten Achse zwischen dem zweiten Hebel und dem Wähler erstreckt, um für die Drehung des Wählers um die zweite Achse relativ zu dem zweiten Hebel zu sorgen.
  10. Werkzeug nach Anspruch 1 oder 2, bei dem
    (a) der Wähler ein Antriebsknopf (30') ist, der eine Eingriffsfläche (111) für einen Finger, eine erste Knopföffnung (95) und eine zweite Knopföffnung (102) aufweist;
    (b) die an das Drehlager angepaßte Öffnung (122) in dem zweiten Hebel gekrümmt ist;
    (c) der Nabenteil (22') des zweiten Hebels eine zweite Hebelöffnung (103) hat;
    (d) die Mittel zur Verbindung des Wählers mit dem zweiten Hebel eine Drehverbindung (101) umfassen, die sich zwischen der zweiten Knopföffnung (102) und der zweiten Hebelöffnung (103) für die Drehbewegung des Knopfes um die zweite Achse relativ zu dem zweiten Hebel erstreckt;
    (e) das Drehlager (90) sich durch die erste Knopföffnung und die gekrümmte Öffnung zu dem ersten Hebel erstreckt.
  11. Werkzeug nach Anspruch 10, bei dem das Drehlager in eine Öffnung (97) in dem ersten Hebel eingepaßt ist.
  12. Werkzeug nach einem der vorhergehenden Ansprüche, bei dem die Hebel zwar normalerweise miteinander verbunden sind, bei dem sie aber trotzdem für eine Reparatur des Werkzeugs oder dergl. voneinander trennbar sind.
  13. Werkzeug nach einem der vorhergehenden Ansprüche, bei dem die Backenteile (18, 18') nicht-symmetrische Spitzenteile (20, 20') enthalten, um zu erlauben, daß ein Spitzenteil von dem anderen passiert werden kann, wenn die Hebel zwischen der ersten und zweiten Position bewegt werden.
EP19880304086 1987-05-07 1988-05-05 Handwerkszeug Expired - Lifetime EP0290260B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US46851 1979-06-08
US4685187A 1987-05-07 1987-05-07
US18201688A 1988-04-29 1988-04-29
US182016 1988-04-29

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EP0290260A2 EP0290260A2 (de) 1988-11-09
EP0290260A3 EP0290260A3 (en) 1990-01-03
EP0290260B1 true EP0290260B1 (de) 1995-11-02

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EP19880304086 Expired - Lifetime EP0290260B1 (de) 1987-05-07 1988-05-05 Handwerkszeug

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CA (1) CA1312454C (de)
DE (1) DE3854628T2 (de)

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ES2139968T3 (es) * 1996-03-01 2000-02-16 Hazet Werk Zerver Hermann Alicates con semi-alicates de cuerpos moldeados de plastico.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1334877A (en) * 1972-10-06 1973-10-24 Wynn Timmins Co Ltd Circlip pliers
DE2364509C2 (de) * 1973-12-24 1983-02-17 Helge Johan Oslo Rindar Montagezange zum Spreizen oder Zusammendrücken von offenen Sicherungsringen

Also Published As

Publication number Publication date
EP0290260A2 (de) 1988-11-09
CA1312454C (en) 1993-01-12
DE3854628D1 (de) 1995-12-07
DE3854628T2 (de) 1996-06-20
EP0290260A3 (en) 1990-01-03

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