A tool assembly designed to couple to a torsion spring and torsion rod to wind and unwind the torsion spring on the torsion rod. The tool assembly includes a variety of components in mechanical communication with one other to rotate the torsion spring. Specifically, the assembly includes a worm gear in mechanical communication with a ring gear and a set of brackets securable to a torsion spring. Between the ring gear and the brackets are a series of plates arranged and assembled on a base, providing a singular device within the assembly that a user can grip to manipulate a torsion spring in a safer manner than possible in the prior art. A drill or other device can couple to attachment points in mechanical communication with the worm gear to rotate the worm gear at a greater rate, thereby reducing the winding and unwinding time of the torsion spring.

An opening/closing direction restriction mechanism for a manual shutter device and an opening/closing direction restriction mechanism for a suspended sliding door device. This opening/closing direction restriction mechanism is provided with: a flange fixedly mounted on a fixed shaft; a bracket which is loosely fitted to the fixed shaft and can be integrally rotated with a winding member; and a two-way clutch which can be switched between a reverse rotation inhibited state in which the revolution of a planetary external gear along a winding direction of the winding member is allowed and the revolution of the planetary external gear along an unwinding direction is inhibited, and a forward rotation inhibited state in which the revolution of the planetary external gear along the winding direction of the winding member is inhibited and the revolution of the planetary external gear along the unwinding direction is allowed.

My invention is a unique tool that permits the winding and unwinding (tensioning and de-tensioning) of torsion springs in situations where adjacent obstructions would otherwise disallow the normal means of this process when using normal trade tools. Sometimes access can be so limited that even the installation of similar tools can be impossible which is why I design it with removable jaw clamp bolts and assembly bolt finger clearance.

The invention relates to an assembly (1) comprising a housing with a balancing spring break protection mechanism, said assembly (1) being configured for connecting a connector (15, 42), such as a bayonet connector, of a balancing spring of a sectional door system to said assembly, said housing being for connection with a fixed structure and comprising a first housing plate (5) comprising an opening (16) for receiving a balancing axle (60) of said sectional door system, said balancing axle (60) being connected to said balancing spring, and an aperture (11) for receiving said connector (15, 42), said spring break protection mechanism comprising a bearing and ratchet wheel unit (4, 7), said ratchet wheel (4) including a shaft (50) for receiving said balancing axle (60).

An overhead door having a floating spring adjustment is presented. Tension is applied to a torsion spring while the door is in the open, minimal tension state. A spring tension adjustment assembly allows the torsion spring to change in length as the number of coils shrink and grow through door operation thereby eliminating the snake-like or serpentine appearance from an improper fixed torsion spring length.

A system for detecting broken springs in overhead doors having automatic door openers includes an automatic door opener having a motor, a sensor configured to monitor performance of the motor in the door opener, and a processor in communication with the sensor. The processor is configured to compare the motor performance with a predetermined threshold level and send an alert when motor performance exceeds the predetermined threshold level.

My invention is a unique component installed onto the ends of torsion springs that adds four additional winding holes and permits the winding and unwinding (tensioning and de-tensioning) of torsion springs in situations where adjacent obstructions would otherwise disallow the normal means of this process while using normal trade tools. Under these limited access conditions, torsion springs that are fitted with the Double Headed Spring Winding Cone would be most desirable when new doors are installed and when old springs on existing doors need replacing.

The overhead door lift assembly integrates a traditional torsion spring and an electrically powered operator into a small package mountable in the available head space of conventional tractor trailers, cargo vehicles or other structures. The lift assembly includes a torsion spring counterbalance, electrical operator, and back tension mechanism. The electrical operator uses an electromagnetic clutch and gearbox that couples directly to the cable drums of the counterbalance. The electromagnetic clutch allows the overhead door to be manually raised and lowered in the event of a power interruption or operator malfunction. The back tension mechanism prevents cables from inadvertently unspooling from cable drums as the operator starts to move the overhead door from its horizontal open position to its vertical closed position.

An overhead door having a floating spring adjustment is presented. Tension is applied to a torsion spring while the door is in the open, minimal tension state. One end of the torsion spring is fixed to a spring tension trolley. The trolley translates within a trolley guide mounted to the building structure. The other end of the torsion spring is fixed to a shaft running through the torsion spring. This allows the torsion spring to change in length as the number of coils shrink and grow through door operation thereby eliminating the snake-like or serpentine appearance from an improper fixed torsion spring length.

The invention relates to a tensioning device (01) for tensioning a coil spring (02) that is supported on a main shaft (03) and at a fixed end is rotatably fixedly connected to a frame. The tensioning device (01) includes a gear drive (05), having a first gear element (06) that is axially displaceably guided on the main shaft (03) and rotatably fixedly connected to a free end of the coil spring (02), and having a second gear element (07) that is in drive engagement with the first gear element (06) in order to set the first gear element (06) in rotation about the main shaft (03). The tensioning device (01) also includes a retaining element (19) that holds the second gear element (11) in the position of drive engagement with the first gear element (06). Furthermore, the tensioning device (01) includes a drive element that is coupled to the second gear element (12) in order to set it in rotation. The gear drive is formed as a bevel gear transmission, wherein the first gear element (06) is formed as a bevel gear (06) and the second gear element (07) is formed as a bevel gear pinion (07), and wherein the rotational axes of the two gear elements (06, 07) extend perpendicularly to one another. The bevel gear (06) is integrally connected to a guide bushing (10), and has a central opening (09) through which the main shaft (03) extends, and has a cylindrical receiving section (12) in which the free end of the coil spring (02) is fastened.