BACKGROUND OF THE INVENTION
The present invention relates to wrenches and more particularly to a wrench having a ratchet head able to vertically and horizontally rotate for 360° and a lengthily adjustable handle.
Wrench is of a tool to use often, prior art wrenches including solid head type, ratchet head type or the left, right rotations and stopping three stepped type. However, the users feel unsatisfied to use the wrench with horizontal rotation ratchet head. That's why the wrench with a vertical rotation ratchet is to rise because of the users demand. But this type of vertical rotation ratchet can only rotate a certain angle and can not rotate for 360°. So that the users can not use it in a defiladed space. FIG. 11 shows a wrench having a ratchet head 30 pivoted to a pair of prongs 31 on the front end of a handle 32. The ratchet head 30 can only vertically rotate on the prongs for a limited angle and has only a driver 33 on one side to drive the box types driving means, which is not convenient and could not present a multifunctional situation. Further, the handle of the prior art wrench including the short type, the middle type and the long type. Therefore, the users must prepare the wrenches of different length of handles that causes inconvenience and cost more.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide a wrench having a ratchet head which is able to vertically and horizontally rotate for 360° in order to give a nimble operation to the users.
Another object of the present invention is to provide a wrench having a ratchet head in which the handle is lengthily adjustable to accommodate the operational requirement and to reduce the volume of the wrench.
Further object of the present invention is to provide a wrench having a ratchet head which has a solid rectangular driver and a hexagon box driver to facilitate the users.
Accordingly, the wrench of the present invention comprises generally a tang adjustably inserted into a handle. The tang has a longitudinal slit and a tong at front end including a pair prongs for pivotally engaging within a ratchet head which has a solid rectangular driver and a hexagonal box driver respectively positioned on upper and lower sides. The feature is that the ratchet head can be able to vertically rotate on the tong for 360° and the drivers on the ratchet head can be able to rotate horizontally for 360° either when drive a working object so as to provide a convenient and a nimble operation of the wrench to the users.
The present invention will become more fully understood by reference to the following detailed description thereof when read in conjunction with the attached drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded perspective view of a preferred embodiment of the wrench of the present invention,
FIG. 2 is a perspective view to show the assembly of the wrench of the present invention,
FIG. 3 is a top sectional view of FIG. 2,
FIG. 4 is a side sectional view of FIG. 2,
FIG. 5 is a side sectional view indicating that a positioning cap is pressed inward while a press button is squeezed to move outward,
FIG. 6 is a side sectional view indicating that the handle is pulling rearward,
FIG. 7 is a side sectional view indicating that the handle is pulled to a rearmost position while a stop block engages within a rear retaining groove,
FIG. 8 is a perspective view to show the vertical rotation of the ratchet head,
FIG. 9 is a side plane view indicating that the ratchet head is rotated a certain vertical angle,
FIG. 10 is a top sectional view to show an alternate embodiment of the wrench of the present invention, and
FIG. 11 is a perspective view of a ratchet head wrench according to a prior art.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to FIGS. 1 to 4 of the drawings, the wrench having a ratchet head able to vertically and horizontally rotate for 360° of the present invention comprises a wrench 10 composed of a tang 11 which has a front retaining groove 111 in a front underside, a longitudinal slit 112 of predetermined length in the center, a rear retaining groove 113 in a rear underside, a pivotal tong 12 connected to front end by a screw 124 through a screw hole 123 having a pair of symmetrical arcuate prongs each of which has an axial hole 121 adjacent free end and an indentation 122 in an inner side communicating to the slit 112, a drum-shaped ratchet head 13 having a pair axial rods 131 on the opposing peripheries pivotally engaged within the axial holes 121 of the prongs, a solid rectangular driver 14 on the center of the bottom, a box driver 15 on the center of the top including a hexagonal central bore 151, wherein the box driver 15 may be magnetic to directly attact a working object, a steel ball 152 in a peripheral through hole and an C-shaped elastic plate 153 wrapped on the outer periphery of the box driver 15 to protect the steel ball 152 and to give the steel ball 152 an elastic displacement force, so that the ratchet head 13 can be able to vertically rotate on the pair of axial holes 121 for 36° (as shown in FIGS. 8 and 9) because the drivers 14 and 15 can be passing through the indentations 122 of the tong 12 so the drivers 14 and 15 can horizontally rotate for 360° on both lateral directions when drive a working object (since the inner structure of the ratchet head 13 is of conventional, no repetitious description is required), a handle 20 having a central bore slidably sleeved on the tang 11, an upper through hole 21, a lower through hole 26 in the opposing peripheries, wherein the lower through hole 26 has a diameter larger than that of the upper through hole 21, a press button 22 disposed in the upper through hole 21 having inner threads, a bolt 23 inserted through the lower through hole 26 and the slit 112 of the tang 11 and having outer threads 232 abutting the upper end screwed with the inner threads of the press button 22 and a stop head on lower end engageable within the retaining grooves 111 and 113 of the tang 11 and a positioning cap 25 fixedly engaged within the lower through hole 26 with a spring 24 biased therebetween.
Referring to FIGS. 5, 6 and 7 and FIG. 4 again, the press button 22 is normally protrueded out of the upper through hole 21 and the stop head 231 of the bolt 23 is engaged within the front retaining groove 111 of the tang 11 due to the resilience of the spring 24. So that the handle 20 is fixed and the wrench 10 is operable. When presses the press button 22 downward to enter into the upper through hole 21, the stop head 231 of the bolt 23 is forced to disengage with in front retaining groove 111 of the tang 11 and the handle 20 is movable on the tang 11 due to the bolt 23 is slidable within the slit 112 (as shown in FIGS. 5 and 6) and when the handle 20 is pulled to a rearmost position of the tang 11, the stop head 231 of the bolt 23 is automatically engaged within the rear retaining groove 113 of the tang 11 due to the resilience of the spring 24. The wrench 10 is therefore elongated. Note that the handle 20 may be made of rigid plastic material or a metal pipe wrapped by plastic and/or the entire metallic material.
FIG. 10 show an alternate embodiment of the wrench of the present invention. This embodiment is mostly similar to the above embodiment as described in FIGS. 1 to 9 and the above instances are mostly applicable. The only changes are that the tang 11 is entirely separated into a pair of symmetrical parts and redesignated as 11′, therefore the longitudinal slit 112 is elongated to the inner end of the tang 11′ and redesignated as 112′. The two symmetrical parts of the tong 11′ are still connected by the screw 124 through the screw holes 123. This modification facilitates the simplification of the manufacturing process. The ratchet head 13 can not only vertically rotate for 360° but also can rotate a desired angle as shown in FIG. 9 and the positioning cap 25 may be fixed or screwed into the lower through hole 26 of the handle 20.
Further, the ratchet head 13 of the present invention not only rotates a desired angle as does by the prior art, but also rotate 360° and the ratchet head 13 has a pair drivers 14 and 15 which is progressive that the prior art which has only one driver.
Note that the specification relating to the above embodiment should be construed as an exemplary rather than as a limitative of the present invention, with many variations and modifications being readily attainable by a person of average skill in the art without departing from the spirit or scope thereof as defined by the appended claims and their legal equivalents.
Patent Application
20050166718
