Abstract:
A mine door installation has a frame installed in a mine passageway. At least one door leaf is mounted on the frame for swinging movement between open and closed positions. Movement of the door leaf is powered by a pneumatic actuator. The door installation also has a hydraulic checking system for controlling the speed of the door leaf as it moves back and forth between open and closed positions. A pneumatically-powered control system may be provided to control the door installation. The pneumatic control system may comprise a calibrated vent to shorten the delay in the response of the door leaf to direction from the control system to stop moving. The pneumatic control system may also comprise a limit valve to prevent the door installation from opening when a second door installation is open, thereby preventing both door installations in an air lock from being open at the same time.
Abstract:
The invention relates to an adaptor for a braking deceleration device for doors or movable furniture parts, which essentially comprises a plunger which can be pushed into a housing against a braking force, with an adaptor body. According to the invention, in the adaptor body at least one accommodation recess for accommodating the housing of the braking deceleration device is made. The adaptor body comprises at least one smooth external surface by way of which it can be fixed to the frame or furniture carcass by means of a suitable adhesive.
Abstract:
A door holder has a piston reciprocable in a cylinder and a rod extending from the piston through one end of the cylinder. The outer end of the rod is pivoted to a door frame and the opposite end of the cylinder is pivoted to the door, or visa versa. A retainer is provided on the rod to prevent the piston and cylinder from contracting after the door has been opened. To release the retainer so that the piston and cylinder can contract, a coil spring is compressed between the retainer and the end of the cylinder. Upon a slight extension of the piston and cylinder beyond the door holding position, the spring pushes the retainer out of engagement with the cylinder so that the piston and cylinder can contract and the door can close.
Abstract:
The provision of a rotational speed controller which is capable of increasing braking torque without a corresponding increase in size, and easily outputting braking torque assumed in the design, and minimizing variations in the braking torque. A casing 6 incorporates a shaft 7 inserted therein, a first rotor 8 rotated together with the shaft 7 in one piece, and a second rotor 10 rotated through the medium of the first rotor 8 and a planet gear 9. A first rotation mechanism for rotating the first rotor 8 is the shaft 7. A second rotation mechanism for rotating the second rotor 10 is a planetary gear mechanism operated in association with the rotation of the first rotor 8.
Abstract:
A closing device for sliding portions of pieces of furniture, such as drawers and the like, consisting of a container fastened to the fixed or to the sliding portion of the piece of furniture wherein there are housed a mechanical energy accumulator and an actuation member that is sliding into a guide of the container, and of a pulling member, respectively fastened to the other side of the piece of furniture, which interacts with the actuation member. The actuation member is directly or indirectly slowed in its movement by a deceleration device based on the use of high-viscosity greases.
Abstract:
A hinge assembly includes a damping unit mounted on a securing seat that is connected to a door frame, a housing embedded in a door panel, and a hinge member and a positioning member interconnecting the securing seat and the housing. The damping unit includes a fluid cylinder and a piston rod having an actuating end pivoted to the positioning member. Due to the presence of the damping unit, movement of the door panel relative to the door frame can be damped.
Abstract:
A door closer assembly and method of making the assembly, in which the closing force is exerted by at least one closing spring. The door closer assembly comprises a housing, a rotor journalled in said housing to deliver torque, and at least one piston apparatus, wherein said housing, said rotor, and said at least one piston apparatus are comprised of the same material of construction and exhibit at least substantially the same thermal expansion coefficient.
Abstract:
An apparatus for the damping of impacts, preferably the impacts of furniture doors or drawers, consists of a cylinder with a piston whose piston rod sealingly guided out of a cylinder side forms a ram absorbing the impacts which divides the cylinder space filled with a liquid into two chambers and has perforations and/or, together with the cylinder wall, bounds a passage gap. A guide bushing guiding the piston rod is arranged in the region of the discharge end of the cylinder. A compression spring is clamped between the piston and the cylinder bottom. To ensure a smooth and quiet running with a compact construction, the guide bushing has a central shaft part of reduced diameter. A widened end part of the guide bushing is supported on a step or annular flange constricting the inner diameter of the cylinder and the guide bushing is supported at the other end on a cover closing the cylinder. The shaft part of the guide bushing is encompassed by a tube-section-like part made of elastic material.
Abstract:
A front lid opening and closing assist which enables an easy and safe operation of opening and closing a front lid of a keyboard instrument. A buffer in the front lid opening and closing assist has a first damping mechanism for damping the front lid when pivoted from a neutral position to an open position, and a second damping mechanism for damping the front lid when pivoted from the neutral position to a closed position. When the front lid is pivoted beyond the neutral position, it spontaneously pivots toward the open or closed position by its own weight. However, this motion is damped by the first and second damping mechanisms, which results in a slowed pivot motion of the front lid. As a result, a user can safely open or close the front lid relative to a back lid, with only minimal force for supporting the front lid.
Abstract:
A rotary damper has a casing having a fluid chamber filled with a fluid, a rotatable member disposed in the fluid chamber for rotation relative to the casing, a vane disposed on an outer circumferential surface of the rotatable member and extending in an axial direction thereof, the vane projecting toward an inner circumferential surface of the fluid chamber and having a first side and a second side opposite to the first side, a fluid passage for allowing the fluid to flow between the first side and the second side at or near a tip end of the vane, and a valve body mounted on the vane for selectively opening and closing the fluid passage. The valve body comprises a valve disposed in a position for closing the fluid passage and a spring for normally urging the valve in a direction to close the fluid passage. The valve and the spring are integrally formed. When the rotatable member rotates in a first direction, the valve opens the fluid passage against the urge of the spring under the pressure of the fluid on the first side of the vane. When the rotatable member stops against rotation, the valve instantaneously closes the fluid passage under the urge of the spring. When the rotatable member rotates in a second direction, the valve keeps closing the fluid passage under the urge of the spring and the pressure of the fluid on the second side of the vane.