Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Reexamination Certificate
2000-10-02
2001-05-15
Smith, James G. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
C081S129000, C081S901000
Reexamination Certificate
active
06230592
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a turnable tightening device, more particularly to a turnable tightening device adapted to tighten a screw hook and adapted to be actuated by a driving tool for screwing the screw hook into a wall.
2. Description of the Related Art
Referring to
FIGS. 1 and 2
, a conventional turnable holding device
1
adapted to hold a screw hook
2
and to be driven by a screw driver
3
for screwing the screw hook
2
into a wall, is shown to be in the form of a plate, and has a rectangular slot
101
formed in an upper end thereof for receiving a hook body
201
of the screw hook
2
, and an actuating hole
102
formed in a lower end thereof such that an actuating end of the screw driver
3
can be inserted therein to turn the tightening device
1
and screw a threaded shaft
202
of the screw hook
2
into a wall. Since the hook body
201
of the screw hook
2
is movable in the slot
101
, the threaded shaft
202
tends to deviate from the rotating axis of the screw driver
3
so as to affect adversely the screwing operation of the screw hook
2
. In addition, the slot
101
of the fixed dimension cannot receive screw hooks of any size.
As shown in
FIG. 3
, another conventional turnable holding device has an upper forked end
301
which defines a V-shaped slot
302
adapted for accommodating screw hooks
2
of any size, and a lower hexagonal post end
303
adapted to engage a socket head of a screw driver
4
. This type of holding device is still disadvantageous in that the hook body of the screw hook
2
may deviate from the rotating axis of the screw driver
4
.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a turnable tightening device which can position a screw hook thereto when being actuated by a driving tool for preventing deviation of the screw hook.
According to this invention, the turnable tightening device includes a stationary member, a movable member, and a biasing member. The stationary member has a lower end portion adapted to be actuated by a driving tool to turn about an axis, and an upper end portion disposed opposite to the lower end portion in a longitudinal direction which is parallel to the axis. The upper end portion includes a first upper wall, a first lower wall opposite to the first upper wall in the longitudinal direction, and a lateral wall extending in the longitudinal direction and joining the first upper wall with the first lower wall. The lateral wall is formed with a slot which extends in a transverse direction relative to the longitudinal direction and which is disposed to communicate the first upper and lower walls. The slot is adapted to permit only a joining member which is disposed between a hook body and a threaded shaft of a screw hook to have access thereto in the transverse direction. The movable member is disposed on the stationary member and is movable relative to the upper end portion in the longitudinal direction by guidance of a guiding member. The movable member includes a second upper wall which faces and which is spaced apart from the first lower wall in the longitudinal direction, and a second lower wall which is disposed opposite to the second upper wall in the longitudinal direction and which has a retaining groove of a profile adapted to retain the hook body of the screw hook. The biasing member is disposed for biasing the movable member away from the upper end portion such that a shoulder portion of the screw hook abuts tightly against the first upper wall and such that the hook body engages tightly the movable member.
REFERENCES:
patent: 882937 (1908-03-01), Fegley
patent: 1271365 (1918-07-01), Reynolds, Jr.
patent: 3342090 (1967-09-01), Martin
patent: 4689881 (1987-09-01), Fall
patent: 5335569 (1994-08-01), Rowley
patent: 6101906 (2000-08-01), Tai
Brooks & Kushman P.C.
Shakeri Hadi
Smith James G.
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