IL187151A - Concealed door hinge - Google Patents

Description

187151/3 Concealed Door Hinge with Connecting Screws that Serve as Bolts 187151/3 Description TECHNICAL FIELD The present invention relates to a concealed door hinge with connecting screws that serve as bolts.

BACKGROUND OF THE INVENTION Most doors are attached to the door jamb by one or more hinges. The common hinge comprises at least two parts, whereby one part is attached to the jamb and the other - to the door. The joining of the two above-mentioned parts of the hinge is usually based on the principle according to which a pin protruding from one part of the hinge fits inside a cylinder affixed to the other part of the hinges so as to enable the pin to pivot within the cylinder and thus enable the door to pivot relative to the jamb.

Hinges commonly in use today protrude and are conspicuous, and are thus aesthetically offensive, particularly when used on entrance doors to homes or buildings. In addition, when the entrance door opens outward, the hinges are outwardly exposed and thus constitute a point of weakness in case of break-in.

The present invention describes a concealed door hinge with connecting screws that serve as bolts, such that the hinge does not protrude and is not visible but rather is concealed and hidden within both the door and the door jamb. In addition, the concealed hinge, subject of the present invention, is constructed so that the door can be raised and lowered relative to the jamb. 187151/3 Patent No. GB 157574 (hereinafter "Patent 574") describes a closet door hinge that comprises three separate components: a main plate to which a curved arm is attached, a first plate, and a fixed plate. The main plate is attached to the first plate by means of the curved arm, and the first plate is in turn attached to the fixed plate. The hinge, subject of Patent 574, is installed by concealing the fixed plate in a special niche in the door jamb and fixing the main plate to the side of the door. The curved arm and the first plate are then attached to the fixed plate.

On the other hand, the concealed door hinge with connecting screws that serve as bolts, subject of the present application (hereinafter "the concealed hinge"), is designed for use on main entrance doors of buildings, rather than on closet doors. The concealed hinge, subject of the present application, consists of a hinge that constitutes a single unit along with one or more connecting screw-bolts. In addition, the concealed hinge, subject of the present patent application, has oval holes that enable the concealed hinge to move up and down in order to adjust its exact position vis-a-vis the door. Furthermore, the screws that connect the concealed hinge to the door and door jamb penetrate accordingly into the door and the jamb and when the door is closed, they serve as bolts that extend from the door into the door jamb, making it harder to breach the door.

THE FIGURES The FIGs attached to the present application are not intended to limit the scope of the invention and the possible ways of its application. The FIGs are intended only to illustrate the invention and constitute only one of many possible ways of its application.

Fig. No. 1 depicts the hinge (1), which comprises a metal plate (4) with two holes (5) and an arm (7) with a hole (8) at its end. 187151/3 Fig. No. 2 depicts the hinge (1) assembled on the door (2) and the jamb (3), including arm (7) and pin (11) that runs through the hole (8), connecting the arm to the body of the door, or more accurately to a metal piece (14) that is attached to the door. A screw (6) attaches the hinge to the jamb, whereby its inward facing end (9) is recessed into the jamb and its outward facing end (12) is recessed into the body of the door when door is closed. The screw (6) is secured by a nut (10).

Fig. No. 3 depicts the hinge (1) assembled on the door (2) and jamb (3). The hinge comprises a metal plate (4) and an arm (7). The hinge is attached to the jamb by screws (6). When the door is closed, the outward facing ends (12) of the screws (6) recess into the door through holes (13) and at the same time, the arm (7) recesses into another hole (15). The other ends of the screws are not depicted in this FIG.

Fig. No. 4 depicts the hinge (1) assembled on the door (2) and jamb (3). The hinge comprises a metal plate (4) and an arm (7). The hinge is attached to the jamb by screws (6) secured by nuts (10). When door closes, the outward facing ends (12) of the screws (6) recess into the door through the holes (13) and at the same time, the arm (7) recesses into another hole (15). The hinge (1) is attached to the door by a pin (11) [through hole (8)] which is attached directly to the body of the door or to a metal plate (14) that is attached to the door.

THE INVENTION The present invention describes a a concealed door hinge with connecting screws that serve as bolts that comprises a door hinge (1), such that the hinge does not protrude and is not visible but rather is concealed and hidden within both the door (2) and the door jamb (3) and one or more connecting screw-bolts (6) that serve as a means for connecting the hinge (1) to the jamb (3) and also as a bolts. 187151/3 FIG No. 1 depicts the hinge (1). The hinge comprises a hinge plate (4), preferably flat, with one or more holes (5), by means of which the hinge (1) is attached to the jamb (3) using one or more connecting screw-bolts (6). The number of screws corresponds to the number of holes (5). An arched arm (7), with a hole (8) at its end, protrudes from the plate (4), preferably from the middle. The arm (7) is curved; at its base, which is attached to the plate (4), the arm is wider, and grows progressively narrower toward its end, as depicted in Fig. No. 1. Fig. No. 1 depicts the hinge (1), which comprises the metal plate (4) with two holes (5) and the arm (7) with the hole (8) at its end.

The hinge (1) is attached to the jamb (3) such that the hinge plate (4) is closely and parallelly affixed to the jamb using one or more connecting screw-bolts (6). A nut (10) can be used to secure the end (9) of the connecting screw-bolt (6) that is in the jamb. When the door is closed, the connecting screw-bolt (6) also serves to reinforce the closing of the door against the jamb. This is possible since the end (9) of the connecting screw-bolt (6) is recessed into the jamb whereas the other end (12) of the connecting screw-bolt (6) is recessed into a recess (13) in the door. There is another hole (15) in the side of the door, directly opposite the hinge, that matches the arms cross-section and enables the hinge to recede into the door when the door is closed. In other words, the door moves toward the hinge and the jamb, and the hole (15) enables the door to close. The connecting screw-bolts (6) in fact serve as a metal rod that extends from the jamb to the door, and thus serves as another bolt offering additional protection against break-in.

The hinge (1) is attached to the door (2) by a pin or screw that is inserted through the hole (8) in a corner of the door (as depicted in the overhead perspective of the door, FIG No. (2), enabling the door to pivot relative to the jamb while the hinge itself is always at rest. The door is attached to the hinge by a screw (11) that is inserted through the hole (8) at the end of the arm (7). 187151/3 The joining of the hinge (1) to the body of the door using the hole (8) in the arm, is executed using a pin or screw (11) that is attached to the body of the door, or possibly to a metal plate (14) that is attached to the door to which the screw (11) is attached when inserted through the hole (8). A disc made of a soft metal such as brass, should be placed between the metal plate and the arm (7) so as to enable minimal friction between arm and the said metal plate.

Joining of the hinge (1) to the jamb using the holes in the plate (4) can be executed by using a screw with nuts, as depicted in the FIGs, or in any other acceptable way. Due to the fact that the hole(s) (5) in the hinge plate (4) are oval, the height at which the door is attached to the jamb can be adjusted. This is done by partially loosening the connecting screw-bolts (6) and raising or lowering the door, to the extent permitted by the space between the connecting screw-bolt (6) and the hole (5) . The door is then positioned in relation to the jamb by tightening the connecting screw-bolts (6) and fixing the door at the desired position relative to the jamb.

Fig.. 2 describes the hinge (1) assembled on the door (2) and the jamb (3), including arm (7) and pin (11) that runs through the hole (8), connecting the arm to the body of the door, or more accurately to a metal piece (14) that is attached to the door. A connecting screw-bolt (6) attaches the hinge to the jamb, whereby its inward facing end (9) is recessed into the jamb and its outward facing end (12) is recessed into the body of the door when door is closed. The connecting screw-bolt (6) is secured by a nut (10).

Fig. 3 describes the hinge (1) assembled on the door (2) and jamb (3). The hinge comprises a metal plate (4) and an arm (7). The hinge is attached to the jamb by connecting screw-bolts (6). When the door is closed, the outward facing ends (12) of the screws (6) recess into the door through holes (13) and at the same time, the arm (7) recesses into another hole (15). The other ends of the screws are not depicted in this FIG.