Tool driving or impacting – Impacting devices – With means for rotating tool
Reexamination Certificate
2000-08-23
2001-03-20
Smith, Scott A. (Department: 3721)
Tool driving or impacting
Impacting devices
With means for rotating tool
C173S217000, C173S132000, C279S019400, C279S019700
Reexamination Certificate
active
06202760
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to an improved structure of multi-functional hand tool, and especially to a hand tool capable of fast changing over grinding members for grinding, carving, polishing, cutting etc. The hand tool of the present invention is rotated by means of an external sleeve on the rear end of a pipe body to move a pushing axle rod to push a movable chuck out of a positioning sleeve, in order to insert a grinding member into the chuck; then the external sleeve pulls the chuck into the positioning sleeve to have the grinding member tightly clamped by the chuck. And then grinding operation can be executed, while the grinding member can be changed over with another one quickly.
2. Description of the Prior Art
Nails of a human body grow and get longer and longer, they need cutting once in a while. In addition to cutting, ladies generally make trimming of nails with files or grinding tools to give nails good appearance. And the nails can be trimmed into the shapes they prefer and can be polished to make the nails smoother, and then nail polish can be applied to increase beauty and brightness of the nails; otherwise, the nails can be stuck thereon artistic patterns, or artificial nails can be stuck on the real nails. Such a variety of ways of nail cosmetology can have trimming done with files, and also can get more detailed grinding with a multi-functional hand tool to make nails finer.
Ordinarily, repair and trimming of an instrument, such as polishing, carving, trimming rough edges, grinding, cutting and drilling etc. must have a hand tool held in a hand for a long time; conventional hand tools have heavier weight, they may make hands ache and thus are not desired. And conventional hand tools each has its pipe body A and a receiving rotational axle B connected with a set of bearings C (as shown in FIG.
1
), the rotational axle B is provided on the front end thereof with an external thread D and an hole E to allow slipping of an elastic chuck F into the hole E, and a sleeve G with an inner thread is slipped over the elastic chuck F and is locked onto the external thread D on the front end of the rotational axle B. Before a grinding member H is inserted into the chuck F, a bolt pin J or a small wrench must be inserted into a hole K on the pipe body A and a positioning hole L on the rotational axle B, then the rotational axle B can be secured to prevent rotation, and the grinding member H can be inserted into the chuck F. Thereafter, the sleeve G is rotated to connect tightly with the external thread D, and the grinding member H is connected to the front end of the rotational axle B. Thereby, rotation of the rotational axle B can bring the grinding member H to rotate for grinding.
When in changing (or taking off) the grinding member H on the rotational axle B, the bolt pin J or the small wrench shall similarly be inserted into a hole K on the pipe body A and a positioning hole L on the rotational axle B, then the sleeve G can be rotated and removed from the front end of the rotational axle B to allow removing of the grinding member H from the chuck F.
In studying changing, insertion or taking off of the grinding member from the above conventional hand tool, a bolt pin or a small wrench has to be used to secure the rotational axle in order to screw tight or loosen the sleeve on the front end of the rotational axle, this is quite cumbersome and inconvenient. While various grinding members are wanted in various operation situations in pursuance of material of a work piece and requirements of repair, hence changing over of the grinding members is necessary from time to time. Although it is a trouble work in changing over, the work has to be done. And more, the bolt pin or the small wrench is an accessory separated from the hand tool, if it is unintentionally lost due to neglect, or it can not be found temporarily, a substitute is required to insert into the hole and positioning hole mentioned above to secure the rotational axle for rotating the sleeve on the front end of the rotational axle. This is a very troublesome hand tool, a user may consume a lot of time in changing over and mounting the grinding members, and thus efficiency of working may be influenced. Thereby, improvement is necessary.
SUMMARY OF THE INVENTION
In view that hand tools are important for repair or trimming of various articles, and conventional hand tools are cumbersome and inconvenient in use and have to be improved. The inventor provides the present invention based on his specific experience of manufacturing, designing, selling etc. for many years and after studying, improvement, development and repeated experiments, examinations and tests. By providing an external sleeve on the rear end of a pipe body to move a pushing axle rod to push/insert a movable chuck out of/into a positioning sleeve, in order to tighten or loosen a chuck to fast change over a grinding member and also to make accuracy of the position of the new grinding member.
The main object of the present invention is: by rotating the external sleeve on the rear end of the pipe body to move a pushing member in the pipe body to push the pushing axle rod and to move the chuck connected to the front end of the pushing axle rod out of/into a positioning sleeve for stretching out/converging, and a grinding member can be placed and clamped in the chuck (or taken out of the chuck).
The secondary object of the present invention is: the positioning sleeve has therein near the front end front end thereof a conical surface of a suitable slope to match a conical surface on the front end of the chuck. When the chuck gets into the positioning sleeve, the conical surface thereof will be confined by the conical surface of the positioning sleeve, and it will be released when it is extended out of the positioning sleeve.
The present invention has another object: the pipe body is provided at an area thereof connecting with the external sleeve with a recess for placing therein a bead and an elastic piece. The external sleeve is provided at an area therein opposite to that of the recess with a positioning hole. The bead in the recess is engaged in the positioning hole when the external sleeve is rotated to make alignment of the positioning hole with the recess, so that the external sleeve can be rotated quickly to be in position, thus the external sleeve has a function of limiting position.
The present invent ion has another object: the rear end of the pushing axle rod can be connected with the rotation axle of a motor, so that the motor can directly move the pushing axle rod to move in and out of the positioning sleeve.
The present invention will be apparent in its structure and features after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings.
REFERENCES:
patent: 3718340 (1973-02-01), Stewart
patent: 3802518 (1974-04-01), Albert
patent: 4091880 (1978-05-01), Troutner et al.
patent: 5360073 (1994-11-01), Akazawa
patent: 5765652 (1998-06-01), Mathis et al.
patent: 5816121 (1998-10-01), Yoshimizu et al.
Bacon & Thomas PLLC
Smith Scott A.
LandOfFree
Structure of multi-functional hand tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure of multi-functional hand tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure of multi-functional hand tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2482168