GB2414705A

GB2414705A - Tool equipped with a turnable driving head

Info

Publication number: GB2414705A
Application number: GB0412273A
Authority: GB
Inventors: Min-Chi Yu
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-02
Filing date: 2004-06-02
Publication date: 2005-12-07
Also published as: GB0412273D0

Abstract

A tool equipped with a turnable driving head includes a left handle 10 and a right handle 20 to couple with a right driving section 30 and a left driving section 40 therebetween. The left handle 10 and the right handle 20 and the right and the left driving sections 30, 40 are coupled together by a coupling element 50 such that the right and left driving sections 30, 40 may be anchored on the front sides of the left and the right handles 10, 20 at a selected angle to wrench C-shaped snap rings to facilitate operation. Each of the handles 10, 20 has a bore hole 12, 22 with a plurality of anchor notches 121, 221 on the peripheral rim so that elastic anchor members 56, which are attached to the shaft 54 of the coupling element 50, may be latched into the desired notches 121, 221. Further slots and troughs 14, 24, 34, 35, 44, 45 are provided to limit movement.

Description

24 14705

TOOL EQUIPPED WI I A TURNABLE DRIVING HEAD

FIELD OF TO INVENTION

The present invention relates to a hand tool for wrenching C-shaped snap rings and particularly to hand tool equipped with a turnable driving head which has an alterable angle to facilitate wrenching operation.

BACKGROUND OF TlIE INVENTION

Conventional hand tools for assembling or disassembling C-shaped snap rings such as the one shown in FIG 1, or long-nose pliers for clamping and extending articles, generally have two insert pins 1 on the front end to couple with two round holes of the C-shaped snap ring (not shown in the drawing) so that the C-shaped snap ring may be removed from the latch groove of a shaft by maneuvering the handles of the pliers. The two insert pins 1 and the handles generally are aligned on the same straight lines. In some complicated machinery the C-shaped snap rings are coupled with the shafts on locations where to couple the insert pins with the round holes of the C-shaped snap rings is difficult. As the driving heads of the pliers cannot be turned to adjust the angle of the insert pins, operation often is hindered due to space constraint.

SUMMARY OF THE INVENTION

Therefore the primary object of the invention is to 2s provide a tool equipped with a turnable driving head that includes a left handle and a right handle. The front ends of the left and right handles are pivotally coupled with a left driving section and a right driving section to clamp work pieces. The left and right driving sections are turnable angularly to be anchored on the front ends of the left and right handles to facilitate assembly and disassembly and wrenching of C- shaped snap rings.

The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a conventional hand tool for assembling and disassembling C-shaped snap rings.

FIG 2 is a perspective view of the present invention.

FIG 3 is an exploded view of the present invention.

FIG 4A is a fragmentary sectional view of the invention.

FIG 4B is a fragmentary sectional view of the invention in an operating condition according to FIG 4A.

FIG 5A is a plain view of an embodiment of the invention.

FIG 5B is a plain view of the invention according to FIG SA with the left and right driving sections turning for 90 degrees.

FIG 5C is a plain view of the invention according to FIG 5A with the left and right driving sections turning for 45 degrees.

FIG 6A is a plain view of the invention with the left and right driving sections in an open condition.

FIG 6B is a plain view of the invention with the left and right driving sections in a closed condition.

DETAILED DESCRIPTION OF TlIE PREFERRED

EMBODIMENTS

Please referring to FIGS. 2 and 3, the tool equipped with a turnable driving head according to the invention includes: a left handle 10 which has a rear end to be grasped by user's hands for wrenching and a first plate 11 on a front end.

The first plate 11 has a longitudinal first bore 12 which has four first anchor notches 121 on the inner rim spaced from one another at a selected interval. The first plate 11 also has a first anchor strut 13 below the first bore 12 and located on the left side of the center line of the first plate 11. The first plate 11 further has an arched first retaining troughl4 on the right side of the center line of the first plate 11; a right handle 20 pivotally coupled with the left handle 10 in an opposing manner. It has a rear end to be grasped by user's hands for wrenching and a second plate 21 on a front end. The second plate 21 has a longitudinal second bore 22 which has four second anchor notches 221 on the inner rim.

The second plate 21 also has a second anchor strut 23 located on the right side of the center line of the second plate 21. The second plate 21 further has an arched second retaining trough 24 on the left side of the second plate 11 corresponding to the first retaining troughl4 of the first plate 11 in a up and down manner to receive a pin 25 for coupling the two together; a right driving section 30 located below the left handle 10 having a first coupling end 31 on a front side and a round first pivot end 32 on a rear side. The first pivot end 32 has a first pivot hole 33 in the center, an arched first housing trough 34 on a front and left diagonal corner and an arched first slot 35 on the upper right side thereof. The first pivot end 32 further has a concave first swivel rim 36 on the rear side retracted towards the center and two first bucking sections 361 on two sides thereof. The first coupling end 31 has two first apertures 311 formed in a front and rear manner to receive first bolts 312 to couple with first nuts 313 to fasten a right jaw 314; a left driving section 40 corresponding to the right driving section 30 in a up and down manner and having a plate type second coupling end 41 on a front side and a round second pivot end 42 on a rear side. The second pivot end 42 has a second pivot hole 43 in the center, an arched second housing trough 44 on a right and front diagonal corner and an arched second slot 45 on the upper left side thereof. The second pivot end 42 further has a concave second swivel rim 46 on the rear side retracted towards the center and two second bucking sections 461 on two sides thereof. The second housing trough 44 and the first housing trough 34 are coupled to hold an elastic element 47 (spring) which has one end pressing the second housing trough 44 and other end pressing the first housing trough 34 to keep the right driving section 30 and the left driving section 40 to extend constantly. The right driving section 30 and the left driving section 40 further have respectively a first stub 38 and a second stub 48 to couple with the second slot 45 and first slot 35. The second coupling end 41 of the left driving section 40 has two second apertures 411 to receive second bolts 412 to coupled with second nuts 413 to fasten a left jaw 414; and a coupling element 50 (referring to FIG. 4A) functioning like a pin. It has a bolt head 51 on one end, and may run through a spring 52 and a third nut 53 and the first bore 12 of the left handle 10, the first pivot hole 33 of the right driving section 30, the second pivot hole 43 of the left driving section 40, and the second bore 22 of the right handle 20. It also has an actuating shaft 54 on other one end matching the sizes of the second and first pivot holes 43 and 33. The actuating shaft 54 has a screw thread section 55 located respectively on a upper end and a lower end, and an elastic anchor member 56 such as a steel ball pressing by a spring abutting each screw thread section 55 corresponding to the first anchor notches 1210f the left handle 10 and the second anchor notches 221 of the right handle 20. The actuating shaft 54 has a distal end coupled with the third nut 53 and confined by a retaining ring 57 thereby to pivotally couple the left and right handles 10 s and 20, and the left and right driving sections 40 and 30 together.

Users may select a left jaw 414 and a right jaw 314 of a desired size for fastening to the left and right driving sections 40 and 30 according to the specification of the C-shaped snap ring.

When in use, in most cases the left and right driving sections 40 and 30 are located on the front ends of the left and right handles 10 and 20 as shown in FIG 5A. In the event that lo there is a space constraint for wrenching operation, the angles of the left and right driving sections 40 and 30 may be altered.

Referring to FIG 4B, first, unfasten the third nut 53 on the upper side of the coupling element 50; then depress the bolt head 51 to separate the left and right handles 10 and 20 from the elastic anchor members 56 so that the left and right handles 10 and 20 may be turned in a biased manner for a selected angle; release the bolt head 51, the spring 52 pushes the coupling element 50 to its original position, and the two elastic anchor members 56 will be latched on other anchor notches 121 and 221; then fasten the third nut 53 to the actuating shaft 54 again to couple with the upper screw thread section 55. Thereby the left and right driving sections 40 and 30, and the left and right handles 10 and 20 may be coupled together at a biased angle (referring to FIGS. 5B and 5C) for 2s wrenching the work pieces.

When the tool is in a clamping condition, the first anchor strut 13 on the lower side of the left handle 10 rams against the first bucking sections 361 on the left and right sides of the first swivel rim 36, while the second anchor strut 23 extended from the inner side wall of the right handle 20 rams against the second bucking sections 461 of the second swivel rim 46 to limit the opening angle of the left and right handles 10 and 20.

Moreover, to maintain the left and right driving sections 40 and 30 in an open condition constantly to wrench and extend the C- shaped snap ring, referring to FIG 6A, it may rely to the elastic element 47 housed in the first and second housing troughs 34 and 44 to provide an elastic force to push and move away the left and right driving sections 40 and 30.

l5 One the contrary, to the move the left and right jaws 414 and 314 on the front ends of the left and right driving sections 40 and 30 to couple with the two round holes of the C-shaped snap ring, referring to FIG 6B, compress the left and right driving sections 40 and 30 to a clamp position desired.

By means of the construction set forth above, the invention provides a feature that allows the left and right driving sections 40 and 30 to alter angle so that the left and right handles 10 and 20 can drive the left and right driving sections 40 and 30 at a biased angle (such as 45 or90 degrees) to wrench the work piece. Thereby it can clamp the C-shaped snap rings easily and make wrenching operation more convenient. The embodiment previously discussed is based on the left and right jaws 414 and 314 for assembling and disassembling the C-shaped snap ring as the work piece.

Depending on different work pieces, different types of jaws may be selected to couple with the front ends of the left and right driving sections 40 and 30.

Claims

What is Claimed is: 1. A tool equipped with a turnable driving head,

comprising: a left handle having a first plate on a front end, the first plate having a first bore which has a plurality of first anchor notches on the peripheral rim, a first anchor strut located on a lower side and an arched first retaining trough on a right side thereof; a right handle pivotally coupled with the left handle in an opposing manner having a second plate on a front side, the second plate having a second bore which has a plurality of second anchor notches on the peripheral rim, a second anchor strut located on an upper side and an arched second retaining trough on a left side thereof; a right driving section having a first coupling end on a front side and a round first pivot end on a rear side, the first pivot end having a first pivot hole in the center, an arched first housing trough on a left diagonal corner, an arched first slot on a upper right side, a concave first swivel rim on the rear side retracted inwards and two first bucking sections on two sides thereof to ram against the first anchor strut of the left handle; a left driving section opposing the right driving section having a second coupling end on a front side and a round second pivot end on a rear side, the second pivot end having a second pivot hole in the center, an arched second housing trough on a right diagonal corner, an arched second slot on a upper left side, and a concave second swivel rim on the rear side retracted inwards; and a coupling element having a bolt head on one end and an actuating shaft on other end, the actuating shaft having respectively a screw thread section located on an upper end and a lower end, and two elastic anchor members located thereon to couple with the anchor notches of the left handle and the right handle, and running through a spring and a nut lo and the first bore and the second bore of the left and the right handles and the first pivot hole and the second pivot hole of the right and the left driving sections to couple with another nut.
2. The tool equipped with a turnable driving head of claim 1, IS wherein the arched first retaining trough and the arched second retaining trough are coupled through a pin.
3. The tool equipped with a turnable driving head of claim 1, wherein the first coupling end and the second coupling end have respectively two apertures to receive bolts to couple with nuts for fastening a pair of a right jaw and a left jaw.
4. The tool equipped with a turnable driving head of claim 1, wherein the first housing trough and the second housing trough of the right driving section and the left driving section jointly hold an elastic element.

2s 5. The tool equipped with a turnable driving head of claim 4, r wherein the elastic element is a spring.

6. A tool equipped with a turnable driving head, substantially as described and illustrated herein with reference to Figs 2, 3, 4A, 4B, 5A, SB, 5C, 6A and 6B. /

Amendments to the claims have been filed as follows

1. A tool equipped with a driving head, comprising: a first handle having a first plate on a first end, the first end plate having a first bore which has a plurality of first anchor notches on the peripheral rim, a first anchor strut and an arched first retaining trough; a second handle pivotally coupled with the first handle in an opposing manner having a second plate, the second plate having a second bore which has a plurality of second anchor notches on the peripheral rim, a second anchor strut and an arched second I O retaining trough; a first driving section having a first coupling end and a round first pivot end, the first pivot end having a first pivot hole, an arched first housing trough corner, an arched first slot, a concave first swivel rim and two first bucking sections on each side thereof to ram against the first anchor strut of the first handle; a second driving section opposing the first driving section having a second coupling end and a round second pivot end. the second pivot end having a second pivot hole, an arched second housing trough on a corner, an arched second slot, and a concave second swivel rim on the rear side; and a coupling element having a bolt head on one end and an actuating shaft on the other end, the actuating shaft having respectively a screw thread section on each end, and two elastic anchor members located thereon to couple with the anchor notches of the first handle and the second handle, and running through a spring and a nut and the first bore and the second bore of the first and the second handles and the first pivot hole and the second pivot hole of the first and the second driving sections to couple with another nut, such that the first and second driving sections are turnable with respect to the first and second handles.

2. The tool equipped with a driving head of claim 1, wherein the arched first retaining trough and the arched second retaining trough are coupled through a pin.

3. disc tool equipped with a driving head of claim 1, wherein the first coupling end and the second coupling end each have respectively two apertures to receive bolts to couple with nuts for fastening a jaw on each coupling end.

e - e e e e e e.

.. - e e e e ! ...... . e 4. The tool equipped with a driving head of claim 1, wherein the first housing trough and the second housing trough of the first driving section and the second driving section jointly hold an elastic element.
5. The tool equipped with a driving head of claim 4, wherein the elastic element is a spring
6. A tool equipped with a driving head, substantially as described and illustrated herein with reference to Figs. 2, 3, 4A, 4B, 5A, 5B, 6A and 6B.