A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier.

A handicap accessibility assistance device includes a drone. The drone has a wedge mechanism at a first end. A controller is configured to cause the drone to approach a door, wedge the wedge mechanism under the door, shift the drone to an opening end of the door, and push the door open.

A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier.

A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier.

A door opener for a door includes a frame coupled to the door and a wheel rotatably supported by the frame. The wheel, including its position relative to the door and frame, as well as its shape, are configured to convert a downward force applied by a user's foot into a lateral force that opens the door by rotating the wheel in contact with the floor.

A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier.

A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier.

When a fuel lid goes from an open state to a closed state and a pressed state and then returns to the closed state, a contact/non-contact switching mechanism switches a signal outputted from a microswitch from an ON signal to an OFF signal by performing a first operation. When the fuel lid goes from the closed state to the pressed state and then returns to the closed state, the contact/non-contact switching mechanism switches the signal outputted from the microswitch from the OFF signal to the ON signal and the OFF signal in that order by performing a second operation. Under a condition at least of the signal outputted from the microswitch switching from the OFF signal to the ON signal and the OFF signal in that order within a prescribed time, a control unit controls a lifter to rotate to another side around an axis line.

When a fuel lid goes from an open state to a closed state and a pressed state and then returns to the closed state, a contact/non-contact switching mechanism switches a signal outputted from a microswitch from an ON signal to an OFF signal by performing a first operation. When the fuel lid goes from the closed state to the pressed state and then returns to the closed state, the contact/non-contact switching mechanism switches the signal outputted from the microswitch from the OFF signal to the ON signal and the OFF signal in that order by performing a second operation. Under a condition at least of the signal outputted from the microswitch switching from the OFF signal to the ON signal and the OFF signal in that order within a prescribed time, a control unit controls a lifter to rotate to another side around an axis line.

A system for contactless operation of an aircraft lavatory door comprises a controller operatively connected to control an actuator for opening and closing a lavatory door. A gesture sensing system is operatively connected to the controller for sending gesture data to the controller indicative of a user gesturing for the actuator to actuate. A mmWave radar sensing system is operatively connected to the controller to indicate user presence. The controller includes machine readable instructions configured to verify gesture input from the gesture sensing system using input from the mmWave radar sensing system before controlling the actuator to open or close the lavatory door.