CA2089407C - Locking device on a pliers shaped tool - Google Patents
Locking device on a pliers shaped toolInfo
- Publication number
- CA2089407C CA2089407C CA002089407A CA2089407A CA2089407C CA 2089407 C CA2089407 C CA 2089407C CA 002089407 A CA002089407 A CA 002089407A CA 2089407 A CA2089407 A CA 2089407A CA 2089407 C CA2089407 C CA 2089407C
- Authority
- CA
- Canada
- Prior art keywords
- lever
- handles
- handle
- shaped rod
- pliers
- 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 - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/2812—Surgical forceps with a single pivotal connection
- A61B17/2833—Locking means
-
- 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
- B25B7/14—Locking means
Abstract
The locking device for a pliers-shaped tool, preferably a pair of pliers (1), has a lever (7) with a spring (8a) on the inner side of the first handle (4a). It has a shaped rod (9) on the inner side of the second handle (4b).
The shaped rod (9) has a catching device (10) and goes through an opening (14) in the lever (7). The lever has a sharp projection (15) in its opening (14), which engages the catching device (10) of the shaped rod (9) in the closed setting in such a way that the pliers (1) can only be closed. With these pliers (1), objects (5) can be gripped, held tight and let loose again.
The locking device in its entirety is placed between the handles (4a and 4b) of the pliers (1). The pliers (1) with the locking devices can be used generally as a tool, but their primary application is in surgery.
The shaped rod (9) has a catching device (10) and goes through an opening (14) in the lever (7). The lever has a sharp projection (15) in its opening (14), which engages the catching device (10) of the shaped rod (9) in the closed setting in such a way that the pliers (1) can only be closed. With these pliers (1), objects (5) can be gripped, held tight and let loose again.
The locking device in its entirety is placed between the handles (4a and 4b) of the pliers (1). The pliers (1) with the locking devices can be used generally as a tool, but their primary application is in surgery.
Description
" b 1 .6.A40 LOCKING DEVICE FOR A PLIERS-SHAPED TOOL
The invention involves a locking device for a pliers-shaped tool according to the introductory clause of Patent Claim 1. The locking device operates to grip the pliers-shaped tool onto an -~ ~
object, to keep it gripped onto it, and to loosen it again. ~s ~-A pliers-shaped tool consists of two handles which are movable against each other about a pivot point. On one side of ~ q~
the pivot point, the handles, each having a lip, form jaws. On the other side, each handle is configured as a grip, possibly with finger holes. The invention will be explained based on pliers as the most common pliers-shaped tool.
Locking devices for pliers-shaped tools are already well known.
Pliers exist in which a movable long screw is found in a handle, which passes through a hole in the other handle. A nut on the outer side of the other handle is threaded onto the screw after the jaw of the pliers has gripped an object, so that the object is firmly held by the jaw of the pliers. The object is then freed when the nut is sufficiently loosened. This -contrivance is applicable even if the pliers is designed to be very rigid, owing to the continuous threading capacity of the nut for any given diameter of the object within the jaw width of the pliers. However, it requires two hands for operation. The screw - -~
projects beyond the area of the handle; thus, applicability of such pliers in conditions where space is limited as, for example in surgery, is restricted.
; ~
I
Another type of pliers has strip-shaped pieces that move against each other on the inner side of each of the handles.
These strip-shaped pieces move past each other in close proximity. On the sides that face each other, the strips have ~ ;
numerous triangular-shaped projections, so that the handles are able to be locked by hooking the trianguIar projections on the strips at various distances from each other. With pliers made to he pliable and elastic, for example with long handles, all objects that are within the maximum jaw width of the pliers can ~-~
be gripped tight, with the gripping pressure differing according to the position of the handles. hetting the object go using one ~;
hand is possible only if the handles, like scissors, having ~ ;
finger holes at the ends. In letting the object go from the pliers, the release of the handle-bracing transverse to the direction of opening necessitates a certain physiologically unnatural expenditure of energy. ~;
Yet another locking device for a pliers is described in W089/06939. In this type of pliers, one of the handles has a toothed rack on its inner side between the pivot point and the grip. The rack goes through an opening in the second handle. At the opening of the second handle there is a safety catch which acts on the toothed rack by means of three different settings.
In its first setting, the pliers can only be closed. In the second setting, the pliers can only be opened. In the third setting, the pliers can be either closed or opened in an unimpeded manner.
' " ' ' ' . . ' ! .. .. .
J .
In the first setting, the pliers grip an object as long as their jaw is adjusted to the object's diameter. They let the object go if another setting is made. The settings are made on a switching mechanism coaxial with the safety catch. They are held upright by a ball located on a compression spring which at any given time engages one of the three settings in the safety catch.
These pliers can be operated one-handed. But they require that the toothed rack extends through the second handle into the ~ ;
external space of the pliers, thus taking up much space like the first set of pliers mentioned above with the screw.
This invention has the intention of creating a plier-shaped tool possessing a locking device that is located within the pliers, but can nonetheless be operated simply and safely using only one hand. -~
This intention will be achieved by the features presented in ;
the characteristics section of Patent Claim 1. The additional claims have to do with advantageous design configurations.
An example of the invention will be explained using illustrations. The following are shown:
Fig. la: Pliers with a locking device in an open setting with a close up of the lever portion;
Fig. lb: The same pliers in the closed setting;
Fig. 2: A catching device in the form of a toothed rack with a shaped rod having a rectangular cross section;
Fig. 3: A catching device in the form of turned grooves with a shaped rod having a circular cross section;
: :' 3 ~ ~
:.
~ , _ /J ~
Fig. 4a: Pliers with another locking device in the closed position; -~
Fig. 4b: A cross section through the portion around the lever of ~ig. 4a in the open position;
Fig. 4c: A cross section as in Fig. 4b in the closed position.
In the illustrations the same component parts that appear multiple times in the various figures are labelled by identical reference numbers.
Fig. la shows a pair of pliers 1 according to the invention in a setting (open setting) in which their handles 4a and 4b are freely movable about the pivot point. Fig. lb shows these pliers in a setting (closed setting) in which their handles 4a and 4b can only be closed.
In pliers 1 one notes the jaws 2, whose halves 3a and 3b here have teeth. Also notable are the two handles 4a and 4b, both ending in finger holes lla and llb on the gripping side. To use the pliers 1, one must put the thumb and middle finger through each finger hole lla and llb, and operate a lever 7 (to be described later) using the index ~inger. In Fig. lb, which shows the pliers 1 in the closed position, an object 5 is embraced by their ~aws 2.
On these pliers 1, the inner side of the second handle 4b, a shaped rod 9 is swivel-mounted by means of a pin 6b. On it is a catching device 10, i.e., an array of periodically arranged shapes which will be described further on using examples. In addition it has a lever 7 attached to the inner side of the first , . ' ~' ', _ CA 02089407 1998-12-15 handle 4a by a pin 6a. This lever 7 is depicted separately in both Fig. la and lb.
The lever 7 and the shaped rod 9 are situated in their entirety between the handles 4a, 4b and do not project outward beyond them at any point. The lever 7 has an opening 14 through which the shaped rod 9 runs. It is so configured that it can assume only two stable settings, an open setting and a closed setting. In the example given, this is achieved by having its end that faces the handle 4a formed in an angled configuration and adjoining a flat piece of a leaf spring 8a. In all intermediate settings, it is brought back by the spring 8a to the open setting or the closed setting.
At its opening 14, the lever 7 has a sharp projection 15 with which it grips the catching device 10 of the shaped rod 9.
This gripping takes place in such a way that the pliers 1 can only be closed. To achieve this, the shaped rod 9 is configured so that the lever 7 and the side of its projection 15 that faces the grip is always perpendicular or nearly perpendicular to the shaped rod 9 in the closed position.
The modules of the catching device 10 of the shaped rod 9 likewise have an edge that runs perpendicular to the direction of the shaped rod 9, and are always pointed toward the grip side of the handles 4a and 4b. Behind them the sharp projection 15 of the lever 7 catches hold, and by this means the lever 7 can no longer be displaced toward the grip side of the handles ~a and 4b. If an object 5 is in the jaws of the pliers 1, then it is CA 02089407 1998-12-1~
gripped tight as soon as the jaws 2 have closed over the object, and then it is automatically held fast by the pliers 1.
In the open setting, the shaped rod 9 lies on a broad surface. It can then run freely through the opening 14, and the pliers 1 can be opened and closed without restriction. An object 5 which is held fast in the jaws 2 of the pliers 1 can be let go when the lever 7 is brought into the open position by a finger of the operating hand.
Examples for the configuring of the catching device 10 on the shaped rod 9 are shown in Fig. 2, in which a rectangular shaped rod 9 is used for the toothed rack, and in Fig. 3, where the shaped rod 9 has a circular cross section and is provided with turned incisions in the form of ring grooves. But the shaped rod can also be configured to have a screw thread or other suitable forms. In all cases the shapes of the catching device 10 are configured asymmetrically, with an edge running perpendicular to the direction of the shaped rod 9, and arrayed in the direction of the grips.
Fig. 4a shows another configuration of the invention-specific pliers 1 in the closed setting. Fig. 4b shows the section around its lever 7 in the closed setting. Fig. 4c shows the section around its lever in the open setting. All three figures will be reviewed together.
In the open setting of the lever 7, the shaped rod 9 moves without restriction in the opening 14 of the lever 7, and the pliers 1 can be opened and closed. The shaped rod 9 is flexibly attached to the second handle 4b of the pliers 1 by means of the .
CA 02089407 1998-12-1~
lever 7. It does so with the help of a suitably shaped spring 8b (in this case, S-shaped), guided by a sliding pad 13. Thus the pliers 1 tend to open to the maximum extent possible and can only be closed by pressing the handles 4a and 4b toward each other.
By means of this forcing the pliers 1 to open, the locking device can be designed differently from what is described above.
The lever 7 has a crescent-shaped slot hole 16 in which moves the pin that connects the lever 7 with the first handle 4b. Here also, the lever 7 may assume two stable settings. In the open setting, the pin 6a is seated in the section of the slot hole 16 which is closer to the jaws as shown in Fig. 4b. Owing to the tension which the spring 8a exerts on the shaped rod 9, the latter is pushed toward the side of the opening 14 in the lever 7 that faces the first handle 4a, and it runs freely on a broad surface of the opening 14.
If one places the lever 7 in the closed setting, the pin 6a moves over to the section of the slot hole 16 that is closer to the grip end, and the lever 7 stands nearly perpendicular on the formed rod. 9. The sharp projection 15 in the opening 14 of the rod 7 can now engage the catching device 10 of the shaped rod 9 and permits the pliers 1 to close only. The lever 7 is thus capable of assuming only two stable settings, the closed setting and the open setting. The remaining parts of the pliers 1 have the same designators and perform the same functions as in Figs.
la and lb.
The pliers 1 thus automatically grip an object 5 (not shown) in their jaws 2, if in the closed setting they have been closed CA 02089407 1998-12-1~
to a sufficient extent that the object 5 is gripped by the jaws of the pliers. They can let it loose again if the lever 7 is shifted to the open position by a finger of the operating hand.
With an invention-specific locking device of which examples are shown in Figs. la, lb and 4a, the lever 7 has an opening 14 through which the shaped rod 9 runs, which has a catching device 10. The lever 7 and the shaped rod 9 are positioned so as to be between the handles 4a and 4b in their entirety. The lever 7 is configured in such a way that, owing to spring pressure, it can assume only two stable settings, an open setting and a closed setting. Within the opening 14, the lever has a sharp projection 15, with which, in the closed setting, it engages the catching device 10 of the shaped rod 9, so that the pliers 1 can only be closed. In contrast, in the open setting, the shaped rod 9 moves over the broad surface of the opening 14 on the lever 7, so that the pliers 1 can be freely opened and closed.
The locking device according to the invention can also be used with pliers 1 in which, for example, the jaw width and the shape of the jaws 2 can be varied using a slotted hole at the pivot point between the two handles 4a and 4b (so-called self-centering pliers).
Naturally, locking devices according to the invention that are created as kits for retrofitting pliers-shaped tools, also are within the scope of this invention.
The locking device according to the invention achieves the stated intention, since it makes possible one-handed operation of pliers-shaped tools, and is configured to be entirely between the . .
handles 4a and 4b of the pliers-shaped tool. Pliers-shaped tools equipped with it can be used generally in industry and by domestic users, but above all they are useful in surgery.
The invention involves a locking device for a pliers-shaped tool according to the introductory clause of Patent Claim 1. The locking device operates to grip the pliers-shaped tool onto an -~ ~
object, to keep it gripped onto it, and to loosen it again. ~s ~-A pliers-shaped tool consists of two handles which are movable against each other about a pivot point. On one side of ~ q~
the pivot point, the handles, each having a lip, form jaws. On the other side, each handle is configured as a grip, possibly with finger holes. The invention will be explained based on pliers as the most common pliers-shaped tool.
Locking devices for pliers-shaped tools are already well known.
Pliers exist in which a movable long screw is found in a handle, which passes through a hole in the other handle. A nut on the outer side of the other handle is threaded onto the screw after the jaw of the pliers has gripped an object, so that the object is firmly held by the jaw of the pliers. The object is then freed when the nut is sufficiently loosened. This -contrivance is applicable even if the pliers is designed to be very rigid, owing to the continuous threading capacity of the nut for any given diameter of the object within the jaw width of the pliers. However, it requires two hands for operation. The screw - -~
projects beyond the area of the handle; thus, applicability of such pliers in conditions where space is limited as, for example in surgery, is restricted.
; ~
I
Another type of pliers has strip-shaped pieces that move against each other on the inner side of each of the handles.
These strip-shaped pieces move past each other in close proximity. On the sides that face each other, the strips have ~ ;
numerous triangular-shaped projections, so that the handles are able to be locked by hooking the trianguIar projections on the strips at various distances from each other. With pliers made to he pliable and elastic, for example with long handles, all objects that are within the maximum jaw width of the pliers can ~-~
be gripped tight, with the gripping pressure differing according to the position of the handles. hetting the object go using one ~;
hand is possible only if the handles, like scissors, having ~ ;
finger holes at the ends. In letting the object go from the pliers, the release of the handle-bracing transverse to the direction of opening necessitates a certain physiologically unnatural expenditure of energy. ~;
Yet another locking device for a pliers is described in W089/06939. In this type of pliers, one of the handles has a toothed rack on its inner side between the pivot point and the grip. The rack goes through an opening in the second handle. At the opening of the second handle there is a safety catch which acts on the toothed rack by means of three different settings.
In its first setting, the pliers can only be closed. In the second setting, the pliers can only be opened. In the third setting, the pliers can be either closed or opened in an unimpeded manner.
' " ' ' ' . . ' ! .. .. .
J .
In the first setting, the pliers grip an object as long as their jaw is adjusted to the object's diameter. They let the object go if another setting is made. The settings are made on a switching mechanism coaxial with the safety catch. They are held upright by a ball located on a compression spring which at any given time engages one of the three settings in the safety catch.
These pliers can be operated one-handed. But they require that the toothed rack extends through the second handle into the ~ ;
external space of the pliers, thus taking up much space like the first set of pliers mentioned above with the screw.
This invention has the intention of creating a plier-shaped tool possessing a locking device that is located within the pliers, but can nonetheless be operated simply and safely using only one hand. -~
This intention will be achieved by the features presented in ;
the characteristics section of Patent Claim 1. The additional claims have to do with advantageous design configurations.
An example of the invention will be explained using illustrations. The following are shown:
Fig. la: Pliers with a locking device in an open setting with a close up of the lever portion;
Fig. lb: The same pliers in the closed setting;
Fig. 2: A catching device in the form of a toothed rack with a shaped rod having a rectangular cross section;
Fig. 3: A catching device in the form of turned grooves with a shaped rod having a circular cross section;
: :' 3 ~ ~
:.
~ , _ /J ~
Fig. 4a: Pliers with another locking device in the closed position; -~
Fig. 4b: A cross section through the portion around the lever of ~ig. 4a in the open position;
Fig. 4c: A cross section as in Fig. 4b in the closed position.
In the illustrations the same component parts that appear multiple times in the various figures are labelled by identical reference numbers.
Fig. la shows a pair of pliers 1 according to the invention in a setting (open setting) in which their handles 4a and 4b are freely movable about the pivot point. Fig. lb shows these pliers in a setting (closed setting) in which their handles 4a and 4b can only be closed.
In pliers 1 one notes the jaws 2, whose halves 3a and 3b here have teeth. Also notable are the two handles 4a and 4b, both ending in finger holes lla and llb on the gripping side. To use the pliers 1, one must put the thumb and middle finger through each finger hole lla and llb, and operate a lever 7 (to be described later) using the index ~inger. In Fig. lb, which shows the pliers 1 in the closed position, an object 5 is embraced by their ~aws 2.
On these pliers 1, the inner side of the second handle 4b, a shaped rod 9 is swivel-mounted by means of a pin 6b. On it is a catching device 10, i.e., an array of periodically arranged shapes which will be described further on using examples. In addition it has a lever 7 attached to the inner side of the first , . ' ~' ', _ CA 02089407 1998-12-15 handle 4a by a pin 6a. This lever 7 is depicted separately in both Fig. la and lb.
The lever 7 and the shaped rod 9 are situated in their entirety between the handles 4a, 4b and do not project outward beyond them at any point. The lever 7 has an opening 14 through which the shaped rod 9 runs. It is so configured that it can assume only two stable settings, an open setting and a closed setting. In the example given, this is achieved by having its end that faces the handle 4a formed in an angled configuration and adjoining a flat piece of a leaf spring 8a. In all intermediate settings, it is brought back by the spring 8a to the open setting or the closed setting.
At its opening 14, the lever 7 has a sharp projection 15 with which it grips the catching device 10 of the shaped rod 9.
This gripping takes place in such a way that the pliers 1 can only be closed. To achieve this, the shaped rod 9 is configured so that the lever 7 and the side of its projection 15 that faces the grip is always perpendicular or nearly perpendicular to the shaped rod 9 in the closed position.
The modules of the catching device 10 of the shaped rod 9 likewise have an edge that runs perpendicular to the direction of the shaped rod 9, and are always pointed toward the grip side of the handles 4a and 4b. Behind them the sharp projection 15 of the lever 7 catches hold, and by this means the lever 7 can no longer be displaced toward the grip side of the handles ~a and 4b. If an object 5 is in the jaws of the pliers 1, then it is CA 02089407 1998-12-1~
gripped tight as soon as the jaws 2 have closed over the object, and then it is automatically held fast by the pliers 1.
In the open setting, the shaped rod 9 lies on a broad surface. It can then run freely through the opening 14, and the pliers 1 can be opened and closed without restriction. An object 5 which is held fast in the jaws 2 of the pliers 1 can be let go when the lever 7 is brought into the open position by a finger of the operating hand.
Examples for the configuring of the catching device 10 on the shaped rod 9 are shown in Fig. 2, in which a rectangular shaped rod 9 is used for the toothed rack, and in Fig. 3, where the shaped rod 9 has a circular cross section and is provided with turned incisions in the form of ring grooves. But the shaped rod can also be configured to have a screw thread or other suitable forms. In all cases the shapes of the catching device 10 are configured asymmetrically, with an edge running perpendicular to the direction of the shaped rod 9, and arrayed in the direction of the grips.
Fig. 4a shows another configuration of the invention-specific pliers 1 in the closed setting. Fig. 4b shows the section around its lever 7 in the closed setting. Fig. 4c shows the section around its lever in the open setting. All three figures will be reviewed together.
In the open setting of the lever 7, the shaped rod 9 moves without restriction in the opening 14 of the lever 7, and the pliers 1 can be opened and closed. The shaped rod 9 is flexibly attached to the second handle 4b of the pliers 1 by means of the .
CA 02089407 1998-12-1~
lever 7. It does so with the help of a suitably shaped spring 8b (in this case, S-shaped), guided by a sliding pad 13. Thus the pliers 1 tend to open to the maximum extent possible and can only be closed by pressing the handles 4a and 4b toward each other.
By means of this forcing the pliers 1 to open, the locking device can be designed differently from what is described above.
The lever 7 has a crescent-shaped slot hole 16 in which moves the pin that connects the lever 7 with the first handle 4b. Here also, the lever 7 may assume two stable settings. In the open setting, the pin 6a is seated in the section of the slot hole 16 which is closer to the jaws as shown in Fig. 4b. Owing to the tension which the spring 8a exerts on the shaped rod 9, the latter is pushed toward the side of the opening 14 in the lever 7 that faces the first handle 4a, and it runs freely on a broad surface of the opening 14.
If one places the lever 7 in the closed setting, the pin 6a moves over to the section of the slot hole 16 that is closer to the grip end, and the lever 7 stands nearly perpendicular on the formed rod. 9. The sharp projection 15 in the opening 14 of the rod 7 can now engage the catching device 10 of the shaped rod 9 and permits the pliers 1 to close only. The lever 7 is thus capable of assuming only two stable settings, the closed setting and the open setting. The remaining parts of the pliers 1 have the same designators and perform the same functions as in Figs.
la and lb.
The pliers 1 thus automatically grip an object 5 (not shown) in their jaws 2, if in the closed setting they have been closed CA 02089407 1998-12-1~
to a sufficient extent that the object 5 is gripped by the jaws of the pliers. They can let it loose again if the lever 7 is shifted to the open position by a finger of the operating hand.
With an invention-specific locking device of which examples are shown in Figs. la, lb and 4a, the lever 7 has an opening 14 through which the shaped rod 9 runs, which has a catching device 10. The lever 7 and the shaped rod 9 are positioned so as to be between the handles 4a and 4b in their entirety. The lever 7 is configured in such a way that, owing to spring pressure, it can assume only two stable settings, an open setting and a closed setting. Within the opening 14, the lever has a sharp projection 15, with which, in the closed setting, it engages the catching device 10 of the shaped rod 9, so that the pliers 1 can only be closed. In contrast, in the open setting, the shaped rod 9 moves over the broad surface of the opening 14 on the lever 7, so that the pliers 1 can be freely opened and closed.
The locking device according to the invention can also be used with pliers 1 in which, for example, the jaw width and the shape of the jaws 2 can be varied using a slotted hole at the pivot point between the two handles 4a and 4b (so-called self-centering pliers).
Naturally, locking devices according to the invention that are created as kits for retrofitting pliers-shaped tools, also are within the scope of this invention.
The locking device according to the invention achieves the stated intention, since it makes possible one-handed operation of pliers-shaped tools, and is configured to be entirely between the . .
handles 4a and 4b of the pliers-shaped tool. Pliers-shaped tools equipped with it can be used generally in industry and by domestic users, but above all they are useful in surgery.
Claims (18)
1. In a pliers-shaped tool having jaws, a first handle having a first end connected to a first jaw and a second end remote from said first jaw, a second handle having a first end connected to a second jaw and a second end remote from said second jaw, a locking device positioned completely between said handles and extending longitudinally of said handles to a point which is nearer to said jaws than are the second ends of said handles, said locking device, in its entirety, being positioned nearer to the jaws than are the second ends of said handles and further comprising a griping mechanism, movable to different settings, on said first handle, and a shaped rod having a catching device on the inner side of the second handle, said gripping mechanism comprising a flat spring adjacent said first handle, and a lever having an angled side with two adjoining plates facing the first handle, said lever being positioned so that in an open setting position one of said surfaces abuts said spring and in a closed setting position the other surface abuts said spring whereby said spring acts to bring the lever back to said open or closed setting position from other positions, the lever and the shaped rod being positioned between the two handles, said lever further having a through hole to receive the shaped rod, and a sharp projection associated with said through hole to engage the catching device when said lever is in its closed setting position, thus permitting the pliers only to be closed, the through hole having surfaces between which the shaped rod can move freely when the lever is in the open setting position so that the pliers can be opened as well as closed.
2. In a pliers-shaped tool having jaws, a first handle having a first end connected to a first jaw and a second end remote from said first jaw, a second handle having a first end connected to a second jaw and a second end remote from said second jaw, a locking device positioned completely between said handles and extending longitudinally of said handles to a point which is nearer to said jaws than are the second ends of said handles, said locking device, in its entirety, being positioned nearer to the jaws than are the second ends of said handles and further comprising a gripping mechanism movable to different settings on said first handle, and a shaped rod having a catching device on the inner side of the second handle, said gripping mechanism comprising a lever, the lever and the shaped rod being positioned between the two handles, said lever having through hole to receive the shaped rod, said lever being configured to assume an open setting position and a closed setting position and having a sharp projection associated with said through hole to engage the catching device when said lever is in its closed setting position, thus permitting the pliers only to be closed, the through hole having surfaces between which the shaped rod can move freely when the lever is in the open setting position so that the pliers can be opened as well as closed, said locking device further comprising an S-shaped spring on said second handle urging said tool toward an open position, said spring having an aperture to accommodate the shaped rod.
3. The locking device claimed in claim 2 and comprising means pivotally attaching said shaped rod to the second handle, said rod extending through the aperture in said spring and the through hole in said lever and said spring being shaped to press the lever against the first handle through the rod.
4. The locking device according to claim 3 and comprising a sliding pad, said spring acting on the shaped rod by means of said sliding pad.
5. In a pliers-shaped tool having jaws, a first handle having a first end connected to a first jaw and a second end remote from said first jaw, a second handle having a first end connected to a second jaw and a second end remote from said second jaw, a locking device positioned completely between said handles and extending longitudinally of said handles to a point which is nearer to said jaws than are the second ends of said handles, said locking device, in its entirely, being positioned nearer to the jaws than are the second ends of said handles and further comprising a griping mechanism movable to different settings on said first handle, and a shaped rod having a catching device on the inner side of the second handle, said gripping mechanism comprising a lever, a crescent shaped slot in said lever, and a pin seated in said slot and connecting said lever to said first handle, the lever and the shaped rod being positioned between the two handles, said lever having a through hole to receive the shaped rod, said lever being configured to assume an open setting position in which said pin is seated at the end of said crescent shaped slot nearer to said jaws, and a closed setting position in which said pin is in a section of the slot more remote from the jaws and a sharp projection associated with said through hole to engage the catching device when said lever is in its closed setting position, thus permitting the pliers only to be closed, the through hole having surfaces between which the shaped rod can move freely when the lever is in the open setting position so that the pliers can be opened as well as closed, said locking device further comprising a spring on said second handle urging said tool toward an open position.
6. In a pliers-shaped tool having jaws and handles adapted to be held by a human hand, a first handle having a first end forming a first jaw and a second end remote from said first jaw, a second handle having a first end forming a second jaw and a second end remote from said second jaw, means pivotally attaching said handles to one another at a pivot point, a locking device positioned completely between said handles and extending longitudinally of said handles to a point which is nearer to said pivot point than are the second ends of said handles, said locking device, in its entirety, being positioned nearer to the jaws than are the second ends of said handles and further comprising a gripping mechanism movable to different settings on said first handle, and a shaped rod, having a catching device, on the second handle, said griping mechanism comprising a lever, the lever and the shaped rod being positioned between the two handles, said lever having a through hole to receive the shaped rod, said lever being configured to assume an open setting position and a closed setting position and having a sharp projection associated with said through hole to engage the catching device when said lever is in its closed setting position, thus permitting the pliers only to be closed, the through hole having surfaces between which the shaped rod can move freely when the lever is in the open setting position so that the pliers can be opened as well as closed, said shaped rod being pivotally attached to the inner side of said second handle at a point nearer to said pivot point than to the second ends of said handles.
7. The locking device claimed in claim 6 and comprising a spring on said second handle, said spring urging said tool toward an open position.
8. The locking device according to claim 7, wherein said lever is shaped so that in the closed setting it is perpendicular to the shaped rod.
9. The locking device claimed in claim 8, wherein the catching device on the shaped rod has perpendicular surfaces facing the end of said handles remote from the jaws.
10. The locking device claimed in claim 7 and wherein said spring is S-shaped and comprises an aperture for accommodating the shaped rod.
11. The locking device claimed in claim 10 and comprising means pivotally attaching said shaped rod to the second handle, said rod extending through the aperture in said spring and the through hole in said lever and said spring being shaped to press the lever against the first handle through the rod.
12. The locking device according to claim 11 and comprising a sliding pad, said spring acting on the shaped rod by means of said sliding pad.
13. The locking device according to claim 6, wherein the shaped rod has a circular cross section, and the catching device comprises periodically placed ring grooves.
14. The locking device according to claim 6, wherein the shaped rod has a cross section with at least two edges, and the catching device comprises a toothed rack.
15. The locking device claimed in claim 6 and comprising a flat spring adjacent said first handle, said lever having an angled side with two adjoining planes facing the first handle, said lever being positioned so that in the open setting position one of said surfaces abuts said spring and in the closed setting position the other surface abuts said spring whereby said spring acts to bring the lever back to said open or closed setting position from other positions.
16. The locking device claimed in claim 6 wherein said lever and said rod are positioned so that said lever can be moved between said open and closed positions by a hand holding said handles.
17. A retrofit kit for a pliers-shaped tool having jaws and handles adapted to be held by a human hand, including a first handle having a first end forming a first jaw and a second end remote from said first jaw, a second handle having a first end forming a second jaw and a second end remote from said second jaw, said handles being pivotally attached to one another at a pivot point, said kit comprising a locking device, means for positioning said locking device completely between said handles to extend longitudinally of said handles to a point which is nearer to said pivot point than the second ends of said handles, so that said locking device, in its entirety, is positioned nearer to the jaws than are the second end so said handles and further comprising a gripping mechanism for attachment to said first handle and movable to different settings, a shaped rod having a catching device and means for attaching said shaped rod to the second handle, said gripping mechanism comprising a lever, said lever having a through hold to receive the shaped rod, said lever being configured to assume an open setting position and a closed setting position and having sharp projection associated with said through hole to engage the catching device when said lever is in its closed setting position, thus permitting the pliers only to be closed, the through hole having surfaces between which the shaped rod can move freely when the lever is in the open setting position so that the pliers can be opened as well as closed, and means for attaching said shaped rod pivotally to the inner side of said second handle at the point nearer to said pivot point than to the second ends of said handles.
18. In a pliers-shaped tool having jaws, a first handle having a first end forming a first jaw and a second end remote from said first jaw, a second handle having a first end forming a second jaw and a second end remote from said second jaw, means for pivotally attaching said handles to one another at a pivot point, a locking device positioned completely between said handles and extending longitudinally of said handles to a point which is nearer to said pivot point than are the second ends of said handles, said locking device, in its entirety, being positioned nearer to the jaws than are the second ends of said handles and further comprising a gripping mechanism movable to different settings on said first handles, and a shaped rod having a catching device, on the inner side of the second handle, said gripping mechanism comprising a lever, the lever and shaped rod being positioned between the two handles, said lever having a through hole to receive the shaped rod, said lever being configured to assume an open setting position and a closed setting position and having a sharp projection associated with said through hole to engage the catching device when said lever is in its closed setting position, thus permitting the pliers only to be closed, the through hole having surfaces between which the shaped rod can move freely when the lever is in the open setting position so that the pliers can be opened as well as closed, said rod being pivotally attached to the inner side of said second handle and extending toward the second ends of said handles.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2036/91A CH683506A5 (en) | 1991-07-09 | 1991-07-09 | Arresting at a pliers-like tool. |
| JP4511207A JPH06500961A (en) | 1991-07-09 | 1992-06-22 | Fixing device for forceps-like tools |
| PCT/CH1992/000118 WO1993001025A1 (en) | 1991-07-09 | 1992-06-22 | Locking system for a forceps like instrument |
| DE59207051T DE59207051D1 (en) | 1991-07-09 | 1992-06-22 | LOCKING DEVICE ON A PLIERS-LIKE TOOL |
| ES92912251T ES2091473T3 (en) | 1991-07-09 | 1992-06-22 | LOCKING DEVICE FOR INSTRUMENTS SIMILAR TO A CLAMP. |
| EP92912251A EP0548302B1 (en) | 1991-07-09 | 1992-06-22 | Locking system for a forceps like instrument |
| CA002089407A CA2089407C (en) | 1991-07-09 | 1993-02-12 | Locking device on a pliers shaped tool |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2036/91A CH683506A5 (en) | 1991-07-09 | 1991-07-09 | Arresting at a pliers-like tool. |
| CA002089407A CA2089407C (en) | 1991-07-09 | 1993-02-12 | Locking device on a pliers shaped tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2089407A1 CA2089407A1 (en) | 1994-08-13 |
| CA2089407C true CA2089407C (en) | 1999-06-15 |
Family
ID=25675894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002089407A Expired - Fee Related CA2089407C (en) | 1991-07-09 | 1993-02-12 | Locking device on a pliers shaped tool |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0548302B1 (en) |
| JP (1) | JPH06500961A (en) |
| CA (1) | CA2089407C (en) |
| CH (1) | CH683506A5 (en) |
| DE (1) | DE59207051D1 (en) |
| ES (1) | ES2091473T3 (en) |
| WO (1) | WO1993001025A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5735874A (en) * | 1996-06-21 | 1998-04-07 | Ethicon Endo-Surgery, Inc. | Variable position handle locking mechanism |
| JP2014221114A (en) * | 2013-05-13 | 2014-11-27 | 株式会社刃物屋トギノン | Scissors |
| US10179001B2 (en) * | 2014-06-30 | 2019-01-15 | DePuy Synthes Products, Inc. | Bone reduction forceps and plate holding forceps |
| CN106474694A (en) * | 2016-10-31 | 2017-03-08 | 程志鹏 | A kind of ball picker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1944116A (en) * | 1930-05-26 | 1934-01-16 | Edward A Stratman | Lever locking device |
| DE827927C (en) * | 1945-02-19 | 1952-01-14 | Waldes Kohinoor Inc | Pliers for installing and removing slotted lock washers |
| US2881649A (en) * | 1957-06-28 | 1959-04-14 | Howard L Ball | Pliers with handle latching means |
| JPS5314860B2 (en) * | 1972-06-26 | 1978-05-20 | ||
| US4538485A (en) * | 1984-03-26 | 1985-09-03 | Tauno Saila | Lockable plier tool |
-
1991
- 1991-07-09 CH CH2036/91A patent/CH683506A5/en not_active IP Right Cessation
-
1992
- 1992-06-22 DE DE59207051T patent/DE59207051D1/en not_active Expired - Fee Related
- 1992-06-22 ES ES92912251T patent/ES2091473T3/en not_active Expired - Lifetime
- 1992-06-22 JP JP4511207A patent/JPH06500961A/en active Pending
- 1992-06-22 EP EP92912251A patent/EP0548302B1/en not_active Expired - Lifetime
- 1992-06-22 WO PCT/CH1992/000118 patent/WO1993001025A1/en active IP Right Grant
-
1993
- 1993-02-12 CA CA002089407A patent/CA2089407C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2089407A1 (en) | 1994-08-13 |
| EP0548302A1 (en) | 1993-06-30 |
| EP0548302B1 (en) | 1996-09-04 |
| DE59207051D1 (en) | 1996-10-10 |
| CH683506A5 (en) | 1994-03-31 |
| JPH06500961A (en) | 1994-01-27 |
| ES2091473T3 (en) | 1996-11-01 |
| WO1993001025A1 (en) | 1993-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5674244A (en) | Locking device on a pliers-shaped tool | |
| CA2025103C (en) | Compound toggle link | |
| US7735399B2 (en) | Clamping and cutting apparatus with adjustable head | |
| US4893530A (en) | Plier-type tool | |
| US6585243B1 (en) | Quick-action bar clamp | |
| US4662252A (en) | Auto-grip pliers | |
| US7730810B1 (en) | Push button multi-position locking pliers and method of use | |
| US5094131A (en) | Hand tool or improved bar clamp | |
| US5267366A (en) | Combination hand tool with retractable pliers jaws | |
| US4651598A (en) | Self-adjusting utility plier | |
| US6892609B2 (en) | Pliers with movable joint | |
| US4802390A (en) | Auto-grip pliers | |
| EP1301130B1 (en) | Safety ratchet mechanism | |
| US5941142A (en) | Ratcheting adjustable jaw wrench and method of use | |
| KR20100012820A (en) | Quick adjusting multi-position pliers | |
| US6095019A (en) | Locking plier tool | |
| US20100282032A1 (en) | Self-adjusting pliers | |
| US4524648A (en) | Fixation tweezers | |
| US6161455A (en) | Adjustable plier | |
| US6311588B1 (en) | Self adjusting utility pliers | |
| US7100480B2 (en) | Quick adjusting pliers | |
| US4995297A (en) | Locking ratchet wrench | |
| CA2089407C (en) | Locking device on a pliers shaped tool | |
| US6408725B1 (en) | Pliers | |
| US6810773B2 (en) | Open end ratchet wrench |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |