Single articulation door hinge

Single articulation door hinge with pressure locking device on a hinge arm, which is located in a hinge cup on a hinge axis; whereby, leg springs of the hinge arm are held resiliently in connection with a pressure roller; whereby, the leg springs are supported with two contact surfaces on the cup casing and have a contact point on the hinge axis.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to door hinges and more particularly to a 
single articulation door hinge having a spring urging resilient pressure 
on a cam of the hinge arm. 
DESCRIPTION OF THE PRIOR ART 
Similar door hinges were made known with U.S. Pat. No. 5,421,063 
(Continuation of abandoned application Ser. No. 07/755,665). With these 
hinge types, the leg spring either loops around the hinge axis or is held 
in its own receptacle. 
The disadvantage of these types of hinges is that in order to loop the 
hinge axis, the axis must undergo a separate operation in order to prepare 
a fitting receptacle for the leg spring. 
In other cases, the fastening of the spring to additional receptacles 
likewise results in higher manufacturing costs. 
Both these types of hinges also have in common that the assembly of the 
spring leg to the door hinge is difficult to achieve. 
Therefore, the task of the submitted invention is to further develop the 
single articulation hinge previously mentioned, so that a simple and cost 
effective production and assembly of the door hinge guarantees the 
retention of the contact pressure operation of the spring leg on the hinge 
arm. 
SUMMARY OF THE INVENTION 
The present invention provides a hinge having a hinge cup with a cup casing 
and hinge axis, a hinge arm provided with a cam and pivoted on the hinge 
axis, and a spring supported in the cup casing and urging a resilient 
spring pressure on the hinge arm cam. 
It significant and fundamental that the spring leg of the present invention 
has two contact surfaces on the cup casing and a contact point on the 
hinge axis. 
The spring leg is therewith simply clamped between the hinge axis and the 
cup casing; there is no longer a need for special grooves on the hinge 
axis or separate receptacles for the free spring ends. 
Thus, a significant and fundamental advantage is achieved; the spring can 
be inserted in the assembly by simply sliding in from the side. Thereby, 
for example, the spring can be inserted by sliding in with of the placed 
pins in the inner space of the spring coil. This pin can remain until the 
final assembly of the spring and no longer must, as previously required, 
be pulled back, as soon as the spring leg is brought on the hinge axis. 
It is provided in a further development of the invention, that the free end 
of the spring leg is supported by a contact surface of the cup casing 
while the coil of the spring leg supported by the cup casing as well as 
the hinge arm. 
The two free spring ends take over the desired press contact operation. 
A first embodiment provides that a free spring end operates directly on a 
cam on the hinge arm so that no additional elements must be interposed. 
Another embodiment provides that the spring end bends down and a pin 
inserts in the resulting receptacle. The free spring end is no longer 
pressed on the cam of the hinge arm, but instead the pin is pressed on the 
cam of the hinge arm. 
This pin can also be provided with a roller or bushing in order to prevent 
the resulting frictional force by the opening and closing of the hinge. 
The basis of the submitted invention results from not only the matter of 
the individual patent claims, but also the various combinations of the 
individual patent claims. All records, documents and evidence, inclusive 
of the summary, open and disclosed statements and declarations, especially 
those represented embodiments in the drawings, will be claimed as 
fundamental and significant inventions, as far as the claims individually 
or in combinations are relative to the position that the technology is new 
.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
According to FIGS. 1 and 2, the single articulation door hinge consists in 
a known manner of a hinge cup (1) which has a cup casing (2). A hinge arm 
(3) is located rotatable on the cup casing (2). 
The cup casing (2) has two inner walls (4) in which the hinge axis (6) is 
located. A hinge arm (3) is located rotatable on the hinge axis (6), so 
that in total a turning motion is possible between the hinge arm (3) and 
the cup casing (2). 
Here in the represented embodiment example the inner wall (4) has on its 
underside a recess (5), which is required for the insertion and fixing of 
the pin (17). 
The fastening of the hinge arm on a wall (21) follows by means of one or 
more screws (23), which engages a lengthwise notch (7) in the hinge arm 
(3); whereby, an adjustment of the hinge arm is possible in relation to 
the wall (21). 
The hinge cup (1) with the cup casing (2) is fastened over one or more 
fasteners (8) in a corresponding notch of the door (22). 
Thereby, the hinge cup (1) with its border (20) is supported by the surface 
of the door (22) and thus guarantees a secure fit. 
Two spring legs (11, 12) serve to press the pin (17) on a cam on the hinge 
arm (3) as shown in FIG. 1. These spring legs (11, 12) have one or more 
coils, which run out in the spring ends (13, 14). Thereby, on the one 
hand, the coils (15) are supported by the corresponding contact surfaces 
(18) of the cup casing and on the other hand on the contact point (24) on 
the hinge axis (6). 
One spring end (14) is supported likewise on a corresponding contact 
surface (19) of the cup casing (2), while the other spring end (13) is 
bent to form a receptacle (16) for the pin (17). 
The pin (17) engages back through the recess (5) of the inner walls (4) and 
fits with its outer side on a cam of the hinge arm (3) as shown in FIG. 1. 
As shown in FIG. 1, the hinge cup (1) swings with the accompanying 
attachment components in arrow direction (10); and, in a pressure roller 
arrangement between pin (17) and cam (25) of hinge arm (3), (17) slides 
along on and is pressed against the cam (25) of the hinge arm (3) and. 
The hinge arm (3), as well as the head of the screw (23) is taken up in a 
closed position within the inner space (9) of the hinge cup (1). 
Opening and closing the hinge can result in shifting of the spring legs 
(11,12) in relation to the cup casing (1) and the hinge axis (6). However, 
the contact surfaces (18, 19) on the cup casing, are so formed that this 
shifting has no negative consequences. 
With the door hinge of the present invention, it is possible for the first 
time to have a simple and cost effective production, and assembly is 
achieved with the retention of the contact press function.