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1. US20120119174 - Device for opening a pull door by applying a pressure

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Claims

1. A device for opening a door in a door frame by staving in the door, wherein the device can exert a thrust on a vertical surface of the door and stave in the door when the device is positioned against the door on the side to which the door opens by being pulled, the device comprising:
an actuator, an intermediate soleplate, and an upper jacking bar;
said actuator comprising a movable rod with one end hingedly fixed on said intermediate sole plate; and
said upper jacking bar being hingedly fixed on said by one end thereof to said intermediate soleplate;
an upper jacking device hingedly fixed to the upper end of said upper jacking bar, said upper jacking device comprising at least one wedging and locking part forming:
a front fiat portion that can be introduced into a slit between the doer frame and the upper end of the door; and
a riser portion extending in a longitudinal direction YY′ perpendicular to and above said front flat portion, the upper end of said riser portion being intended to face a partition above the door frame; and
a rear portion located at the base of and behind said riser portion, at the underside of which a fixing element is capable of allowing pivotal hinging of said wedging and locking part relative to the upper end of said jacking bar.
2. The device according to claim 1, wherein the upper end of said riser portion of the wedging part comprises a bearing part having a bearing surface extending in a plane YY′, ZZ′ perpendicular to the upper and lower faces of said front flat portion and can come into contact with and press against the vertical partition above the door frame, when said front flat portion is inserted horizontally and forced as far as possible into said slit between the upper end of the door and the door frame, said bearing surface having a dimension that is greater than the surface of the upper portion of said riser portion, on which said bearing part is fixed.
3. The device according to claim 2, wherein said bearing surface is located vertically in front of said riser portion such that only said bearing surface is in contact with the partition above the door frame when said front flat portion is inserted horizontally into said slit.
4. The device according to claim 2, wherein said bearing part can be fixed to the upper end of said riser portion in two different positions, wherein the distance between said bearing surface and the front face of said riser portion is different, the two said positions corresponding to inversion of the faces constituting the front face and rear face of said bearing part relative to the upper end of said riser part on which said hearing part is fixed.
5. The device according to claim 1, wherein said front flat portion comprises:
a front end comprising an underside beveled at an angle of approximately 30°, facilitating insertion of said front flat portion into said slit; and
an upper grooved or corrugated face, said grooves or corrugations being inclined rearwardly; and
a lower face comprising at least one corrugation or a portion in the form of a rearwardly inclined hook.
6. The device according to claim 1, wherein said wedging and locking part comprises a striking part in the form of a block constituting an anvil located at the base of said riser portion, at least partially above said rear flat portion, said anvil-forming striking part being detachably fixed on said wedging and locking part.
7. The device according to claim 1, wherein said front flat portion and said riser portion of the said wedging and locking part have the same dimension in a direction ZZ′ perpendicular to said longitudinal direction YY′ of said riser portion.
8. The device according to claim 1, further comprising:
a lower soleplate, the other end of said actuator being fixed in hinged manner to said lower soleplate; and
said actuator is a double-acting actuator comprising an actuator body constituted by a cylindrical chamber comprising two movable rods that can exert thrusts oriented in opposite directions to each other, the ends of said movable rods on the external side of said cylindrical chamber being fixed in hinged manner to said intermediate and lower soleplates respectively; and
said upper jacking bar is adjustable in length constituted by two telescopic tubes, the length of said jacking bar being adjustable by locking the relative position of said telescopic tubes; and
said intermediate soleplate comprises a flat support one face of which, which is intended to press against said door or vertical planar surface, comprises non-slip elements and the other face of which comprises means for fixing in a hinged manner said actuator and said upper jacking bar.
9. A device according to claim 1, further comprising:
a hydraulic power supply delivering a pressure, mounted on a frame structure that can be carried on the back of an operator; and
said hydraulic power supply being connected to a single-acting hydraulic actuator via a handle that can control opening and closing of supply and return hydraulic fluid valves of said single-acting hydraulic actuator.
10. A method of exerting a thrust on a pull door, wherein the device according to claim 1 is used and the following steps are carried out:
1) said front flat portion is inserted in a slit between the upper end of the door and the door frame, forcing said front flat portion in as far as possible until the base of said riser portion abuts against the door frame or a molding facing the door frame; and
2) said actuator is disposed with an inclination relative to the vertical, with
said intermediate soleplate pressing against the vertical planar surface of said door;
said actuator pressing against a lower external jacking point; and
3) the movable rod of said actuator is extended so as to exert said thrust on said intermediate soleplate until the inclination of said actuator is increased by an angle of at least 3°.
11. The device according to claim 1, wherein said riser portion extends over a length equal to at least three times the dimension of said front flat portion in the direction XX′ perpendicular to said longitudinal direction YY′ of said riser portion, and said rear portion being a rear flat portion extends in a direction XX′ perpendicular to said longitudinal direction YY′ of said riser portion.
12. The device according to claim 1, wherein said fixations in each manner are detachable fixations.