Patent Application
20210331295
The present invention relates to an improvement of a ratcheting wrench.
Typically, a ratcheting wrench includes a driving element provided with teeth, and a catching device provided with teeth for engaging with the driving element. Also, it is known that the number of teeth is subject to a strength-related limit, i.e., a maximum of 72. That is, in a situation where the driving element has more than 72 teeth, each of the teeth is overly small. As a result, the teeth are likely to get damaged.
Thus, the driving element has a minimum tooth-changing angle of 5 degrees approximately. Due to the aforesaid limitation, the wrench fails to work in a driving operation environment where the tooth-changing angle is less than 5 degree.
The present invention is, therefore, intended to obviate or at least alleviate the problems encountered in the prior art.
According to the present invention, a ratcheting wrench includes a body receiving a driving element, two catches, and at least one catch holder. The two catches and the at least one catch holder are biasingly connected by two position-restoring elements. The driving element is provided with ratchet teeth and the two catches have tooth portions engagable with the ratchet teeth. The tooth portion of one of the two catches is ahead of or lags behind the tooth portion of another one of the two catches by a half-tooth distance.
There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto.
In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.
As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.
Further, the purpose of the foregoing abstract is to enable the public generally, and especially the scientists, engineers and practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a cursory inspection the nature and essence of the technical disclosure. The abstract is neither intended to define the invention, which is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
Other objectives, advantages, and new features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanied drawings.
The body 10 defines a driving hole 11 and a catching chamber 12 laterally disposed about and connected to the driving hole 11. The catching chamber 12 is shallow at its two ends and deep at its middle.
The driving element 20 is provided with ratchet teeth 21 and defines a driving hole 22 for receiving a workpiece to be rotated by the wrench.
The catches 30 and 30′ are disposed in the catching chamber 12 and stacked. The catches 30 and 30′ have abutting ends 31 and 31′ abutting against the catching chamber 12 and tooth portions 32 and 32′ engagable with the ratchet teeth 21. A starting end 320 of the tooth portion 32 is in the form of a trough, whereas a starting end 320′ of the tooth portion 32′ is in the form of a peak. The tooth portion 32 is ahead of or lags behind the tooth portion 32′ by a half-tooth distance. The catches 30 and 30′ have two positioning portions 33 and 33′ keeping the two position-restoring elements 40, respectively, such that end portions of the position-restoring elements 40 are positioned in place. The positioning portions 33 and 33′ are recess. Moreover, the positioning portions 33 and 33′ are straight recesses.
The position-restoring elements 40 biasingly connects the catches 30 and 30′ and the catch holder 50. The position-restoring elements 40 have first ends abutting against the catches 30 and 30′ and second ends abutting against the catch holder 50. The catch holder 50 has an abutting surface 51 abutting against the catching chamber 12 and two positioning portions 52 keeping the two position-restoring elements 40, respectively, such that the second ends of the two position-restoring elements 40 are positioned in place. The positioning portions 52 are recess. Moreover, the positioning portions 52 are straight recesses. The two position-restoring elements 40 are straight coil springs.
The catches 30 and 30′ can engage with the ratchet teeth 21 of the driving element 20 alternatively, i.e. in tooth engagement, as shown in
In view of the foregoing, the catches 30 and 30′ engage with the driving element 20 alternatively, so a small transmission-oriented tooth-changing angle is feasible. Furthermore, the position-restoring elements 40 are stably retained and thus, providing a stable driving effect and facilitates the assembly of the ratcheting wrench.
The foregoing is merely illustrative of the principles of this invention and various modifications can be made by those skilled in the art without departing from the scope and spirit of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202020672415.4 | Apr 2020 | CN | national |
