Abstract: A hinge for the controlled rotatable movement of a closing element anchored to a stationary support structure includes a pivot, a hinge body and a hydraulic damping cylinder. The pivot has a first axis and includes a cam, and the hinge body is engaged to the pivot so as to be rotatably coupled to each other around the first axis. The hydraulic damping cylinder includes a jacket and a plunger element, and the jacket defines a second axis, houses a working fluid and is divided into a first and a second variable volume compartment in fluid communication with each other. The plunger has a first and a second end respectively inserted into the first and second variable volume compartment to slide sealingly in the jacket. The hinge body includes a working chamber defining a third axis that is substantially perpendicular to the first axis and contains an elastic counteracting member.

Abstract: A hinge for the rotatable movement of a closing element, such as a door, a window, a shutter or the like, includes a fixed element anchorable to a stationary support structure and a mobile element anchorable to the closing element. The fixed and movable elements are mutually coupled so as to rotate with respect to each other between an open position and a closed position. One of the fixed or movable element includes a working chamber, with a plunger disposed to slide along a longitudinal axis and operatively coupled with the other one of the fixed or movable elements so that the sliding of the plunger corresponds to a rotation of the movable element.

Abstract: A door actuator for opening and/or closing a door leaf includes a housing, an output shaft rotatably supported in the housing and with a cam disc, wherein the output shaft is formed for transferring torque onto the door leaf. A first element of motion is linearly movably guided in the housing with a first contact surface. A second element of motion is linearly movably guided in the housing with a second contact surface. A distancing arrangement is disposed in the housing. The cam disc is disposed between the two contact surfaces and for rolling on the two contact surfaces. In at least one delimiting range of angles of rotation of the output shaft, the distancing arrangement delimits the minimum distance between the elements of motion, and, in at least one free range of angles of rotation, does not delimit the linear mobility of the two elements of motion in relation to each other.

Abstract: A combination door operator assembly and door, wherein the door operator assembly includes an operator unit mounted to the door on the pulling side or the pushing side thereof, an arm linkage having a driving arm and a driven arm, a mounting bracket preferably mounted on the frame to which the door is hinged, a rechargeable power storage pack having at least one of a rechargeable battery and one or more capacitors, and a controller, for monitoring a speed and a position of the door, wherein when the door moves faster than a predetermined speed, the motor is used as a generator to charge the rechargeable power storage pack and the speed of the door is reduced.

Abstract: A clamping bar arm for a concealed door closer preferably includes a mounting base, an adjustment arm, a clamp block, a pair of clamp fasteners and a pair of adjustment fasteners. The mounting base includes a mounting plate and an adjustment extension. The pair of adjustment fasteners are threaded through the adjustment extension. A pivot pin is inserted into a top of the adjustment extension. The adjustment arm includes a clamp arm and a stop projection, which extends downward from one end of the adjustment arm. A closer spindle notch is formed in an opposing end of the clamp arm to receive a closer spindle of a concealed closer. The clamp block is secured to an opposing end of the adjustment arm with a pair of clamp fasteners. An adjustment pivot hole is formed through the clamp arm to receive the pivot pin.

Abstract: A hydraulic solenoid control valve, including a valve housing, a valve chamber, having a first valve seat bore as a connection to a first line, a second valve seat bore as a connection to a second line, and a free aperture to a third line, a solenoid, and a valve spindle movable by the solenoid and partially arranged in the valve chamber. The valve spindle includes, a first sealing surface facing the first valve seat bore and a second sealing surface facing the second valve seat bore. The first and the second valve seat bores can be closed. The valve spindle protrudes from the valve chamber through the second valve seat bore toward the solenoid. When the second valve seat bore is closed, the valve spindle is pulled into the second valve seat bore by a differential-area-ratio through the pressure in the second line.

Abstract: A door operator for operating a door includes a housing, an output shaft with a cam disc, an opening piston guided in the housing, which piston, on a first side, bears against the cam disc, an energy accumulator acting upon the opening piston for storing a closing energy for the door, and a damping piston guided in a cylindrically shaped hollow space of a cylinder element, and which piston, on a second side, bears against the cam disc, wherein the cylinder element is firmly connected to the opening piston.

Abstract: A self-returning hinge assembly utilizing a spring disposed along a linearly displaceable guide shaft element mounted through a polymeric guide plate disposed in substantial alignment with an aperture supporting an elongated proximal portion of the guide shaft. Upon displacement of the door from a pre-established set point, the spring is compressed thereby generating a biasing force along the guide shaft to bring the door back to the pre-established set point. The linear travel path of the guide shaft element is maintained by the guide plate.

Abstract: A constructive arrangement in elastomeric spring for closing doors which comprises a hollow tube having one end provided with a base and the inner area the provision of an elastomeric spring disposed juxtaposed to said base having a tracking member positioned on the elastomeric spring which receives the tracking member on the opposite face whose free end presents edge provided with female fitting which allows the positioning of a cam with male fitting pressed by a pin fixed to the tube through a bushing and having inner cap with fixing holes and protective cap.

Abstract: A patch fitting for a glass door includes a mount for being mounted on a floor, a shaft connected with the mount, a clamping seat pivotally connected with the shaft, and a piston unit installed inside the clamping seat. When the glass door is sweeping to open or close, the clamping seat will turn along with the sweeping movement of the glass door about the shaft and the piston unit will be pushed by an eccentric cam of the shaft to press the hydraulic oil contained in the clamping seat so as to provide a damping resistance in response to the sweeping movement of the glass door. The patch fitting can be easily installed on the floor by a simple work.

Abstract: A floor spring includes a case, a damper assembly received in the case, and mixed powder filling a space inside the case covering the damper assembly. The damper assembly includes a spindle extending outwardly from the case. The mixed powder can prevent water, dust, or insects enter the case, such that the damper assembly is not tend to rust or fail.

Abstract: A patch fitting for a glass door includes a mount for being mounted on a floor, a shaft connected with the mount, a clamping seat pivotally connected with the shaft, and a piston unit installed inside the clamping seat. When the glass door is sweeping to open or close, the clamping seat will turn along with the sweeping movement of the glass door about the shaft and the piston unit will be pushed by an eccentric cam of the shaft to press the hydraulic oil contained in the clamping seat so as to provide a damping resistance in response to the sweeping movement of the glass door. The patch fitting can be easily installed on the floor by a simple work.

Abstract: A door closer comprising a housing, a member for driving engagement with a door, the member being rotatable relative to the housing in a door opening direction and in a door closing direction, a spring apparatus within the housing providing a resilient bias, the resilient bias being increased by rotation of the member in the door opening direction and a check device for controlling rotation of the member in the door closing direction and hence closure of the door under the action of the spring apparatus, the door closer having a back check comprising a piston member movable in a cylinder from an initial position against resistance of a fluid medium by rotation of the rotatable member in the opening direction.

Abstract: A door closer comprises a housing (21) in which a compression spring (23) urges a piston (22) in one direction, an operating spindle (18) in the housing defining an axis (19) about which an arm mechanism (52) connected to the housing is angularly movable to effect movement of the piston in the opposite direction. Connected between said axis (19) and the piston (22) is a linkage mechanism which provides that, in use, maximum torque is exerted on the arm mechanism at the near closed position of the door. The linkage mechanism can have a pivotal connection (27) between links (25, 26) thereof constrained to follow a continuous curve by means of a cam track (30, 31) or an additional link (48).

Abstract: A hydraulic control system for automatically closing and opening a door is disclosed and has means for providing such opening and closing even if power is lost to the hydraulic control system. Further disclosed is a fluid control device of the hydraulic system which prevents the door from being opened or closed too quickly that might otherwise harm an individual that comes into the path of the moving door.

Abstract: A floor-mounted door closure device comprising a floor trough insertable in a cavity of the floor and arranged to receive the closer casing from which a pivot pin projects, the device further comprising a cover plate covering the floor trough and closer casing. The cover plate is designed as a carrier for a material layer made of flooring material and is supported on the floor trough such that the cover plate is sunk in the cavity and the material layer carried by the cover plate is substanatially flush with the surface of the flooring material surrounding the cavity.

Abstract: A door closer has a cam and follower mechanism for transmitting movement between a spring and an operating member which is connected with a door. Guide elements for the cam follower can be adjusted relative to a housing to adjust the orientation relative to the housing to which the operating member is urged by the spring.

Abstract: A hydraulic hinge that includes an elongated tubular member in which a first ring member with an axial opening and a downward projection is fixed and a second ring member having an opening aligned with the opening of the first ring member and a notched portion having a cam face to abut against the projection of the first ring is provided. A hollow shaft with a closed bottom and a first fluid filled piston chamber within the same is inserted through the openings of the first and second ring members, whereat the second ring member is sealed in a sleeve around the hollow shaft. The hollow shaft has an opening formed adjacent to its bottom closed. A seal member is sealed around the hollow shaft wherein the inner surface of the elongated tubular member, the second ring member, the seal member and the outer wall surface of the hollow shaft cooperatively confine a second fluid filled chamber which is in communication with the first hydraulic chamber through the opening.

Abstract: An automatic door/window closing device has a center shaft provided with V-shaped spiral channels to a base such as its surface and secured to a base such as the ground, a floating piston which forms a screw pair with the shaft by engagement of steel balls in the spiral channels, a housing with a flange which is secured to the door or window, a spring for providing the force to automatically close the door, and a cover. This device has a simple structure and is very light and which permits a door to be opened in both directions. After opening, the door will automatically close, and it can be also be damped for slowly closing the door. The door will rest when it opens to 90.degree..

Abstract: A door closing device which is easily mounted on, and easily removed from, an offset pivot hinge. The door closing device has an outer sleeve, an inner member rotatably mounted in the outer sleeve and a coil spring having opposite ends thereof connected to the outer sleeve and the inner member, respectively. The door closing device is mounted on, and operatively connected to, the pivot hinge by non-rotatably fitting the inner member and the outer sleeve with a pivot pin of the pivot hinge and a hinge plate pivoted on the pivot pin, respectively .The door closing device is provided with a door closing speed damping mechanism, a door stopper mechanism, and/or a preset mechanism for the door closing torque, which are assembled within the outer sleeve.