Abstract:
The present invention provides an apparatus for operating a garage door. An embodiment of an operating mechanism for a door includes a shaft, a drum, an energy storing member, and a swivel body. The shaft is coupled to the door such that the shaft rotates in a first direction as the door is opened and rotates in a second direction as the door is closed. The coupling of the shaft to the door is typically accomplished by a cable. The drum is coupled to the shaft and the energy storing member is coupled to the drum by another cable. The energy storing member is arranged such that the energy storing member stores energy as the door is closed and releases stored energy as the door is opened to assist in the raising and lowering of the door.
Abstract:
The present invention provides an apparatus for operating a garage door. An embodiment of an operating mechanism for a door includes a shaft, a drum, an energy storing member, and a swivel body. The shaft is coupled to the door such that the shaft rotates in a first direction as the door is opened and rotates in a second direction as the door is closed. The coupling of the shaft to the door is typically accomplished by a cable. The drum is coupled to the shaft and the energy storing member is coupled to the drum by another cable. The energy storing member is arranged such that the energy storing member stores energy as the door is closed and releases stored energy as the door is opened to assist in the raising and lowering of the door.
Abstract:
An automatic closing device for returning a sliding section of a sliding door assembly to a closed position without application of an external force. The automatic closing device has a controlled return mechanism that has an adjustable mass assembly and a spring. The controlled return mechanism generates a force that returns the sliding section to its closed position after the sliding section is opened. The controlled return mechanism has a connector having a first end and a second end. The first end of the connector is attached to a fixed position on the sliding door assembly and the second end of the connector is attached to a top end of the controlled return mechanism. The controlled return mechanism has a pulley assembly having a plurality of pulleys that guides the connector from the top end of the controlled return mechanism to the fixed position on the sliding door assembly.
Abstract:
An upwardly acting sectional door system including, a door (D) having a plurality of hinged door sections (16-18) movable between a closed vertical position and an open horizontal position, a drive tube (31) mounted above the door in the closed vertical position, an operator (11) selectively directionally rotatably driving the drive tube, cable drums (35) mounted on the drive tube for rotation therewith by the operator, springs (60) mounted in operative relation to the cable drums, and counterbalance cables (75) reeved about the cable drums and interconnecting the springs and the door to counterbalance the door when moving between the closed vertical position and the open horizontal position.
Abstract:
The assembly comprises an extension spring (3) anchored at one end to a winch (4) mounted to the door opening frame (5). A double-grooved pulley (10) is mounted on a plate (7) secured to the free end of the spring. A fixed second double-grooved pulley (11) is mounted to the door frame (5). A pair of cables (22, 23) are anchored at one end to the door frame (5) and extend in parallel to pass around the two pulleys (10, 11). After the second pulley (11), the cables separate and extend down to the bottom corners of the door (2), to which they are secured. Upon release of the door latch with the door down, the spring contracts and, through the first pulley, applies an equal pull to the two cables so that they move at the same rate, thereby raising the door smoothly.
Abstract:
An overhead door apparatus (10) utilizing a torsion spring counterbalancing mechanism (30). The counterbalancing mechanism (30) includes a worm drive ring-shaped gear winding mechanism (38) for setting the appropriate torque or number of winds in the spring (32). A counting mechanism (140) is provided to indicate to the installer the number of winds being given to the spring (32). Means are also provided for accommodating spring growth and contraction during winding and unwinding using the winding mechanism (38) and during normal raising and lowering of the door (12). A spring clip gear retainer (82) is disclosed for preventing rotation or creep of the worm drive gear (70) and spur gear (56) during normal raising and lowering of the door (12). A second embodiment is disclosed allowing more universal interchangeability of components between the left and right sides of the door system (200), easy snap-in assembly, and including a telescoping spring cover (252). Each embodiment includes a spring winding counter (140).
Abstract:
The present invention provides for apparatus and methods for operating a garage door. An embodiment of an operating assembly for a door includes a shaft, a graduated drum, and an energy storing member. The shaft is coupled to the door such that the shaft rotates in a first direction as the door is opened and rotates in a second direction as the door is closed. The coupling of the shaft to the door is typically accomplished by a cable. The graduated drum is coupled to the shaft and the energy storing member is coupled to the graduated drum by another cable. The energy storing member is arranged such that the energy storing member stores energy as the door is closed and releases stored energy as the door is opened to assist in the raising and lowering of the door.
Abstract:
Disclosed is a discretionarily adjustable friction force block and tackle balance system comprising a housing and an adjustable break, wherein means are provided for adjusting the friction force between an inner surface of the housing and the adjustable break. An adjustable balance system comprising a housing, a floating anchor assembly, a fixed anchor assembly, a cord, and an elastic suspension is also disclosed. In an embodiment, the housing is a 3-side or 4-side tube or channel. There is at least one elongated hole or slit on at least one surface of said housing. An adjustable break is mounted inside the floating anchor subassembly. Moving the window sash also causes the floating anchor subassembly to move. When the floating anchor subassembly is moved to a position just under elongated hole on the said housing, the adjust screw installed in the adjustable break is exposed. The desired friction force can be easily created and adjusted by turning the adjust screw in the appropriate direction to splay or retract the adjustable break for balancing window sashes having widely varying sizes and weights.
Abstract:
In a block and tackle window balance, the balance shoe holds and upwardly biases the terminal connector in a mounted position. A biasing element of the shoe maintains the terminal connector in a pocket of the shoe during operation of the balance. The terminal connector is prevented from laterally exiting the pocket in the mounted position by a widened portion on the terminal connector and a locating surface extending from the shoe toward the pocket. Manually pressing down on the biasing element or the terminal connector itself to lower the terminal connector in the pocket until the widened portion clears the locating surface allows lateral removal of the terminal connector from the pocket. During operation of the balance, however, the terminal connector does not experience a sufficient downward force to overcome the upward bias such that the widened portion never clears the locating surface.
Abstract:
A mechanism and method for operating a track-mounted door is disclosed. The mechanism includes a pair of side drums that are connected by first cables to the bottom of the door. The side drums are coaxially mounted on a shaft for simultaneous rotation with a pair of cable drums. The cable drums are connected to high pressure gas struts by second cables. Each second cable is carried around a shiv wheel that slides along a guide track as the second cable moves. Each shiv wheel is operatively connected to one of the gas struts. As the shiv wheel moves along the guide track toward the cable drum, the gas strut is charged. As the shiv wheel moves away from the cable drum, the gas strut is discharged. A standard electric motor and screw driven lift-arm is used to initiate the opening and closing of the door. The charged gas strut stores sufficient energy to overcome friction and gravity to assist the electric motor and lift-arm to open the door.