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US 6,089,133 AGranted
Screwdriver
OwnerYoun Chyuan Liaoinventor
Life of this patent
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OwnerYoun Chyuan Liaoinventor
Estimating the term…
The present invention is related to a screwdriver in which a shaft lever with polygon socket is inserted into the central hole of the screwdriver handgrip so that a turning shaft to facilitate force application is plugged from the rear end of the handgrip into the socket in order to perform a rapid rotation of the shaft lever; the other end of the shaft lever can be connected to a extension shaft to be in a coupled state while an application shaft for screwdriver head can be plugged into the inner hole of the extension shaft, and the screwdriver head is inserted into the socket of the application end of the application shaft to perform screwing, wherein the application shaft for screwdriver head can be designed to be section-type, and the application shaft can be stretched inside of the connection inner hole of the extension shaft and shaft lever by means of an engaging member fitted to the outer circumference of the extension shaft so that the exposing length is adjustable; in addition, a freely turning sleeve can be mounted between the handgrip and the extension shaft to be a holding supporting point in performing a rapid screwing.
A screwdriver comprising a shaft lever with an axial polygon socket around which a turning sleeve is mounted at one end thereof in which an extension shaft with an inner hole is so plugged that said socket of said shaft lever and said inner hole of said extension shaft are connected with each other, and the other end of said shaft lever is plugged into one end of a handgrip, and said shaft lever is connected to said other end of said handgrip by means that a male thread at said other end of said shaft lever is screwed with a female thread of a locating turning cover at the other end of said handgrip, and a U-shaped turning shaft with two bending ends and a plug shaft to facilitate the force application can be plugged into said socket of said shaft lever at the end of said handgrip, the two bending ends of said U-sahped turning shaft each are pivoted with a turning sleeve respectively, and one end of said extension shaft is fitted with an engaging member to be connected with a section-type application shaft for screwdriver head so that said application shaft can be retraced to and extended from inside of said connecting inner hole of said extension shaft and said shaft lever and it exposing length is therefore adjustable.
A screwdriver comprising:
A screwdriver comprising:
Dependencies are inferred from the claim text.