Abstract:
The buffer device (10) has a body (11) which can be fitted in a rail (4), a damping element (12) for cushioning, and a retaining spring (13) for retaining a running mechanism (6) which is guided in the rail (4) and is provided for carrying and guiding slidable wing elements (2). The at least approximately U-profile-shaped body (11) of the buffer device (10), which body is punched and bent from a metal element, has a first and a second wing (14; 18), which wings are connected to each other by a central piece (20) whose tongue-shaped extension forms the retaining spring (13) serving to retain the running mechanism (6). The end pieces (17, 19, 26; 17*, 19*) of the wings (14; 18) are configured in such a manner that they are suitable for retaining the damping element (12). The buffer device (10) can be manufactured cost-effectively from a single metal plate and can be completed by a damping element (12). Since the retaining spring (13) is a component part of the body (11) of the buffer device (10), the device is highly stable.
Abstract:
Hardware designed to improve safety and minimize the risk involved in installing, maintaining, and operating sectional doors that use spring mechanisms to facilitate door movement. A lock-on side bearing bracket bears up a spring mechanism on a garage door. This side bearing bracket includes a hook and a perpendicular tab to prevent the spring mechanism from dangerously releasing its energy when parts supporting the spring mechanism are removed or fail. A lock-on bottom roller bracket having a bottom bearing plate and a safety hook similarly prevents a potential, dangerous release of energy when the garage door lift cable is in tension. A safety latch with a latch bar and a latch cover acts as a lock for the garage door. The use of multiple safety features makes the garage door systems of the present invention particularly safe to operate and maintain.
Abstract:
A cable control device (10, 110) in a sectional overhead door (11) having a motor-driven counterbalance system (30) including a spring-loaded drive shaft (31), cable drums (35) carried by the drive shaft, cables (C) attached to and interconnecting the cable drums and the door and forming and releasing cable wraps of the cable on the cable drums upon raising and lowering of the door, and shrouds (10, 110) associated with the cable drums engaging the cable wraps through substantially the circumference of the cable drums to maintain axial alignment of the cable wraps with the cable drums in the event of the development of slack in the cables.
Abstract:
A cable control device (10) for a sectional overhead door (11) having a motor-driven counterbalance system (30) including, a spring-loaded drive shaft (31), cable drums (33) carried by the drive shaft, cables (C) attached to and interconnecting the cable drums and the door and forming and releasing cable wraps on the cable drums upon raising and lowering of the door, and retainers (60) associated with the cable drums engaging a portion of at least one cable wrap to maintain engagement of the cable wrap with the cable drums in the event of the development of slack in the cables.
Abstract:
A method for selective alteration and control of door movement modes utilizing an apparatus that is primarily non-hydraulic and incorporated with a known mechanism which is functional independently from the apparatus in one mode of operation and which includes a piston for controlling door closing characteristics by selected fluid flow within the mechanism. The apparatus includes a motor driven lead screw having a linearly movable shuttle unit mounted thereon, the shuttle unit being positioned relative to the piston of the mechanism to accommodate nonattached contact with the piston to urge the piston, when the shuttle unit is moved, in a direction that will at least provide selective assistance with door opening in another mode of operation. Operation of the apparatus is controlled by programming of a related controller including non-volatile memory.
Abstract:
A door control device for use on a non-fire side of a fire-door mounted in a door frame in a fire-door safety installation has a door closer assembly filled with a hydraulic damping fluid and attached to a non-fire side of the fire-door by at least one fastener; a door control arm pivotally connected to the door frame at a first end and to the door closer assembly at a second end; and the hydraulic damping fluid is one of a group of fire resistant hydraulic fluids.
Abstract:
An overhead door apparatus utilizing a torsion spring counterbalancing mechanism. The counterbalancing mechanism includes a worm drive ring-shaped gear winding mechanism for setting the appropriate torque or number of winds in the spring. A counting mechanism is provided to indicate to the installer the number of winds being given to the spring. Means are also provided for accommodating spring growth and contraction during winding and unwinding using the winding mechanism and during normal raising and lowering of the door. A spring clip gear retainer is disclosed for preventing rotation or creep of the worm drive gear and spur gear during normal raising and lowering of the door. A second embodiment is disclosed allowing more universal interchangeability of components between the left and right sides of the door system, easy snap-in assembly, and including a telescoping spring cover. Each embodiment includes a spring winding counter.
Abstract:
An automatic door closing device comprises a base and an oil guiding loop. The base is provided in the direction of a longitudinal axis thereof with a canal and is further provided in the direction of a short axis thereof with a through hole. A sliding block and a spring are received slidably in an outer end portion of the canal. The oil guiding loop comprises a shaft tube having an inner end dimensioned to fit into the canal of the base and having an outer end provided thereon with a threaded portion and tension scale markings, a washer provided with a through hole and fitted into the outer end of the shaft tube, a sustaining rod having an outer end dimensioned to fit into the through hole of the washer and having an inner end provided thereon with an arresting flange dimensioned to fit into the outer end of the shaft tube, a rotating sleeve having an inner wall provided thereon with threads and having an inner diameter so dimensioned as to fit slidably over the threaded portion of the shaft tube, and a cap dimensioned to fit into the outer end of the shaft tube.
Abstract:
A door closer the closing force of which can be adjusted is provided with a device for indicating the selected closing force. The device used to indicate the prevailing closing force is actuated in dependence on the adjustment of the spring which determines the closing force.
Abstract:
An adjustable spring loading mechanism for use in controlling the movement of doors and the like. The mechanism includes a cylinder housing and a piston slideable within the housing. An adjustable biasing mechanism selectively increases the load on the springs in the cylinder. The mechanism comprises a plurality of biasing means in the housing in engagement with the piston and arranged to apply individual biasing forces to the piston which cooperate to produce a total resultant force. Load adjustment means are engaged with each biasing means to vary the individual biasing forces to thereby proportionately vary the resultant force.