Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Cap over the head
Reexamination Certificate
2002-02-12
2003-10-21
Wilson, Neill (Department: 3679)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Cap over the head
C411S372600, C411S375000, C411S910000
Reexamination Certificate
active
06634842
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a crime prevention screw that after the screw is tightened in desired places, a recessed portion, such as square socket, hexagon socket, cross socket and slot, formed on a screw head is covered and hence drawing-out of the screw with the intention of prank and crime can be prevented, an embedding material of a screw head for embedding in a recessed portion of the crime prevention screw, a screw-use crime prevention seat for preventing the crime prevention screw from being drawn out using tools such as pincers and pliers, and a crime prevention screw set composed of their combination.
2. Description of the Related Art
A screw of the conventional art is constituted so that a screw head is formed on a base end of a screw main body where a spiral groove is formed on its outer peripheral surface. Such a screw has heads of various shapes. Example of a machine screw are a flat fillister head screw, a round head screw, an oval fillister head screw, a pan head screw, a binding head screw, a truss head screw, a countersunk fillister head screw and an oval head screw. These screw heads are formed with recessed portions composed of sockets or grooves such as a square socket, a hexagon socket, a cross socket and a slot for engaging an end portion of a tool such as a square spanner and a driver and rotating the screws. Another example is a bolt having a hexagonal head (screw head) which is one kind of a screw, and this bolt head (screw head) is formed with such a recessed portion.
In addition, conventionally a flat seat having a doughnut shape viewed from top which is fitted into a screw main body and is received by the screw head is used for the above screws.
These screws are used in various fields. For example, as shown in
FIGS. 1 and 2
, a number plate
2
is attached to a car body
1
of an automobile A by using screws
3
,
3
. In this case, conventionally screws
31
,
31
having a hexagonal head that the surface of the hexagonal head is formed with a cross socket, or circle fillister head screws are generally used.
Further, a car stereo and a car navigation device which are provided in a room of the automobile A are similarly fixed by countersunk head screws.
In addition, as shown in FIGS.
3
and
4
(
a
), for example, a metal-made crime prevention grid P is generally attached to an outside of a window W of a house for crime-prevention countermeasure. Lattice main bodies
4
, and upper and lower lateral materials
5
and
6
of the metal grid B are assembled and fixed also by using screws
3
. In this case, as shown in FIG.
4
(
b
), countersunk head screws
32
that a cross socket is formed on their screw heads, circle fillister head screws or pan head screws, not shown, are used. Moreover, as shown in FIGS.
4
(
a
) and
4
(
b
), also in the case where the grid P is attached to the outside of the window W, the grip P is fixed to a sash
7
that an end portion of a stay
6
of the grid P is formed integrally with a window rail by using slightly larger screws
3
such as countersunk head screws or pan head screws.
When the number plate
2
is attached to the car body
1
and the grid P is attached to the outside of the window W by using the above-mentioned various screws
3
of the conventional art, the following problems arise.
More concretely, even if the number plate
2
is attached to the car body
1
by using the screws
3
(for example, the screws
31
,
31
) of the conventional art, the screws
3
(
31
) can be drawn out by using a tool such as a plus driver or a small spanner. For this reason, when or after a car is stolen, the number plate
2
is easily removed or easily replaced by another one.
When the number plate
2
is removed or replaced by another stolen number plate, it is difficult to find the stolen car. For this reason, the case that stolen high-grade cars are exported abruptly increases in many places. Moreover, cases of stealing, robbery and kidnap using stolen cars with feigned number plates occurred frequently in times past. Further, the case that screws which fix a car stereo and a car navigation device to the automobile A are loosened and these devices are stolen are increasing.
As mentioned above, when the lattice main bodies
4
, and the upper and lower stays
5
,
6
are fixed by using the screws
3
(
32
) of the conventional art or the grid P is attached to the sash
7
by using the screws
3
of the conventional art, these screws
3
(
32
),
3
are drawn out on the outside of a house so that the lattice main bodies
4
and the entire grid P can be removed easily. In particular, inhabitants consider that the crime prevention is sufficient because the grid P is attached to the outside of the window W, so that they frequently leave the window W open and unlocked. For this reason, the case that a thief removes the grid R easily and opens a screen
9
and the window glasses
10
,
11
and intrudes through the window W into the house and infringes stealing and felonious crime occurs frequently.
In the light of the fact that the screw can be remove easily as one reason which easily causes the above cases, the inventors of the invention have proceeded to develop a new screw which cannot be easily removed after it is once tightened. As a result of their enthusiasm examination, finally they have devised a crime prevention screw which cannot be loosened or removed even by using a tool such as a driver or a square bar spanner after the screw is once tightened, a screw head embedding material which can be used for not only this crime prevention screw but also screws conventionally in the market, and a screw-use crime prevention seat which prevents a screw head from being pinched and being rotated through a tool such as pincers or a spanner.
SUMMARY OF THE INVENTION
It is an object of the present invention which has been finished through such a prehistory to provide a crime prevention screw that after the screw is tightened in predetermined places, an embedding material is embedded in a recessed portion composed of a square socket, a hexagon socket, a cross socket or a slot formed on a screw head so that the screw can be prevented from being drawn out with the intention of many pranks and malignant crimes. Example of such crimes are car stealing through removal of a number plate of an automobile, resale and export of stolen automobiles, stealing and robbery or kidnapping using a stolen car, stealing of a car stereo and a car navigation device in an automobile, intrusion of a thief and a public enemy through a window into a house by means of drawing out of screws for fixing a grid to the window or screws for attaching a grid to a sash of the window.
Further, it is an object of the present invention to provide an embedding material of a screw head which embeds in screw heads of various screws including such a crime prevention screw and is capable of fixing the screws so as to prevent the screws from being drawn out.
Furthermore, it is an another object of the invention to provide a screw-use crime prevention seat which can prevent a prank that the screw head is pinched by pincers or pliers to be loosened and drawn out (in the case where such prank cannot be prevented by even using the crime prevention screw and the embedding material) and the above-mentioned crimes derived from this prank.
Further, it is still another object of the invention to provide a crime prevention screw set composed of the crime prevention screw and the embedding material or a crime prevention screw set composed of the crime prevention screw and the embedding material and the screw-use crime prevention seat.
A crime prevention screw of the present invention from a first aspect which is one of means to solve the above problems, is characterized in that a recessed portion which is composed of a square socket, a hexagon socket, a cross socket or a slot for engaging and rotating an end portion of a tool such as a square bar spanner or a driver is formed on a screw head, and a recessed engagement portion is fo
Greigg Ronald E.
Wilson Neill
LandOfFree
Crime prevention screw, embedding material of screw head,... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crime prevention screw, embedding material of screw head,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crime prevention screw, embedding material of screw head,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3155173