Abstract: The present disclosure includes a retrofitted door brake cam. The retrofitted door brake cam may, in various embodiments, comprise a hub comprising a cylindrical central axle, a plurality of projections extending radially away from an outer circumference of the central axle, and/or a cam comprising a plurality of pins that hold the projections away from a channel wall of a brake housing. The pins may be configured to break away from the cam to release the projections into contact with the channel wall, and the pins may be fitted with a cover, such that the pins are capable of withstanding abrasion and wear. The cover may comprise a cylinder having an axially running aperture, and/or a beveled edge that shaves a layer of the outer surface from one of the plurality of pins as it is fitted over the pin.

Abstract: The present disclosure includes a retrofitted door brake. The retrofitted door brake may, in various embodiments, comprise a hub comprising a cylindrical central axle, a plurality of projections extending radially away from an outer circumference of the central axle, and/or a cam comprising a plurality of pins that hold the projections away from a channel wall of a brake housing. The pins may be configured to break away from the cam to release the projections into contact with the channel wall, and the pins may be fitted with a cover, such that the pins are capable of withstanding abrasion and wear. The cover may comprise a cylinder having an axially running aperture, and/or a beveled edge that shaves a layer of the outer surface from one of the plurality of pins as it is fitted over the pin.

Abstract: The present disclosure includes a system and article of manufacture for a door assembly for rolling and unrolling, or retracting and extending, a door curtain. The door assembly may include various mechanisms to protect a door curtain from wear and abrasion, as well as muffle noise associated with the operation of the door curtain. The door assembly may comprise a curtain shaft. A door curtain may roll and/or unroll (e.g., open and/or close) on the curtain shaft. The door assembly may further include an insulator shaft, which may receive or hold a door curtain insulator or insulators. A door curtain insulator may attach to the insulator shaft as well as the curtain shaft and/or door curtain itself. In operation, as the door curtain is rolled up, one or more lengths of insulator may be unrolled from the insulator shaft and layered, or interleaved, between consecutive layers of rolled up door curtain.

Abstract: The present disclosure includes systems, methods, and articles of manufacture for controlling a door. In various embodiments, exemplary systems may include a controller that may initialize and/or reset a limit count. A controller may initialize and/or reset a limit count in response to detection by a first position sensor of a first target. A controller may further initialize and/or reset a limit count by incrementing the limit count in response to a signal from a gear tooth sensor until a second position sensor detects a second target, whereupon the controller may store the limit count.

Abstract: The present disclosure includes a retrofitted door brake. The retrofitted door brake may, in various embodiments, comprise a hub comprising a cylindrical central axle, a plurality of projections extending radially away from an outer circumference of the central axle, and/or a cam comprising a plurality of pins that hold the projections away from a channel wall of a brake housing. The pins may be configured to break away from the cam to release the projections into contact with the channel wall, and the pins may be fitted with a cover, such that the pins are capable of withstanding abrasion and wear. The cover may comprise a cylinder having an axially running aperture, and/or a beveled edge that shaves a layer of the outer surface from one of the plurality of pins as it is fitted over the pin.

Abstract: The present disclosure includes systems, methods, and articles of manufacture for controlling a door. In various embodiments, exemplary systems may include a controller that may initialize and/or reset a limit count. A controller may initialize and/or reset a limit count in response to detection by a first position sensor of a first target. A controller may further initialize and/or reset a limit count by incrementing the limit count in response to a signal from a gear tooth sensor until a second position sensor detects a second target, whereupon the controller may store the limit count.

Abstract: The present disclosure includes a system and article of manufacture for a door assembly for rolling and unrolling, or retracting and extending, a door curtain. The door assembly may include various mechanisms to protect a door curtain from wear and abrasion, as well as muffle noise associated with the operation of the door curtain. The door assembly may comprise a curtain shaft. A door curtain may roll and/or unroll (e.g., open and/or close) on the curtain shaft. The door assembly may further include an insulator shaft, which may receive or hold a door curtain insulator or insulators. A door curtain insulator may attach to the insulator shaft as well as the curtain shaft and/or door curtain itself. In operation, as the door curtain is rolled up, one or more lengths of insulator may be unrolled from the insulator shaft and layered, or interleaved, between consecutive layers of rolled up door curtain.

Abstract: The present disclosure includes a retrofitted door brake. The retrofitted door brake may, in various embodiments, comprise a hub comprising a cylindrical central axle, a plurality of projections extending radially away from an outer circumference of the central axle, and/or a cam comprising a plurality of pins that hold the projections away from a channel wall of a brake housing. The pins may be configured to break away from the cam to release the projections into contact with the channel wall, and the pins may be fitted with a cover, such that the pins are capable of withstanding abrasion and wear. The cover may comprise a cylinder having an axially running aperture, and/or a beveled edge that shaves a layer of the outer surface from one of the plurality of pins as it is fitted over the pin.

Abstract: The present disclosure includes systems, methods, and articles of manufacture for controlling a door. In various embodiments, exemplary systems may include a controller that may initialize and/or reset a limit count. A controller may initialize and/or reset a limit count in response to detection by a first position sensor of a first target. A controller may further initialize and/or reset a limit count by incrementing the limit count in response to a signal from a gear tooth sensor until a second position sensor detects a second target, whereupon the controller may store the limit count.

Abstract: The present disclosure includes a retrofitted door brake. The retrofitted door brake may, in various embodiments, comprise a hub comprising a cylindrical central axle, a plurality of projections extending radially away from an outer circumference of the central axle, and/or a cam comprising a plurality of pins that hold the projections away from a channel wall of a brake housing. The pins may be configured to break away from the cam to release the projections into contact with the channel wall, and the pins may be fitted with a cover, such that the pins are capable of withstanding abrasion and wear. The cover may comprise a cylinder having an axially running aperture, and/or a beveled edge that shaves a layer of the outer surface from one of the plurality of pins as it is fitted over the pin.

Abstract: The present disclosure includes a retrofitted door brake. The retrofitted door brake may, in various embodiments, comprise a hub comprising a cylindrical central axle, a plurality of projections extending radially away from an outer circumference of the central axle, and/or a cam comprising a plurality of pins that hold the projections away from a channel wall of a brake housing. The pins may be configured to break away from the cam to release the projections into contact with the channel wall, and the pins may be fitted with a cover, such that the pins are capable of withstanding abrasion and wear. The cover may comprise a cylinder having an axially running aperture, and/or a beveled edge that shaves a layer of the outer surface from one of the plurality of pins as it is fitted over the pin.

Abstract: The present disclosure includes a system and article of manufacture for a door assembly for rolling and unrolling, or retracting and extending, a door curtain. The door assembly may include various mechanisms to protect a door curtain from wear and abrasion, as well as muffle noise associated with the operation of the door curtain. The door assembly may comprise a curtain shaft. A door curtain may roll and/or unroll (e.g., open and/or close) on the curtain shaft. The door assembly may further include an insulator shaft, which may receive or hold a door curtain insulator or insulators. A door curtain insulator may attach to the insulator shaft as well as the curtain shaft and/or door curtain itself. In operation, as the door curtain is rolled up, one or more lengths of insulator may be unrolled from the insulator shaft and layered, or interleaved, between consecutive layers of rolled up door curtain.

Abstract: The present disclosure includes systems, methods, and articles of manufacture for controlling a door. In various embodiments, exemplary systems may include a controller that may initialize and/or reset a limit count. A controller may initialize and/or reset a limit count in response to detection by a first position sensor of a first target. A controller may further initialize and/or reset a limit count by incrementing the limit count in response to a signal from a gear tooth sensor until a second position sensor detects a second target, whereupon the controller may store the limit count.

Abstract: The present disclosure includes a system and article of manufacture for a door assembly for rolling and unrolling, or retracting and extending, a door curtain. The door assembly may include various mechanisms to protect a door curtain from wear and abrasion, as well as muffle noise associated with the operation of the door curtain. The door assembly may comprise a curtain shaft. A door curtain may roll and/or unroll (e.g., open and/or close) on the curtain shaft. The door assembly may further include an insulator shaft, which may receive or hold a door curtain insulator or insulators. A door curtain insulator may attach to the insulator shaft as well as the curtain shaft and/or door curtain itself. In operation, as the door curtain is rolled up, one or more lengths of insulator may be unrolled from the insulator shaft and layered, or interleaved, between consecutive layers of rolled up door curtain.