A protective apparatus and an aerial work device are disclosed. The protective apparatus comprises a bracket (1) and a cover (2); the upper side of the cover (2) is hinged to the upper side of the bracket (1); the protective apparatus further comprises a pull-down apparatus (4); the pull-down apparatus (4) comprises a fixed pulley (403), a movable pulley (404), a push rod (407) and a pull rope (401); the fixed pulley (403) is fixedly connected to the cover (2); the movable pulley (404) is located above the fixed pulley (403); the movable pulley (404) is slidingly connected to the cover (2); a fixed end of the pull rope (401) bypasses the movable pulley (404) and is connected to the fixed pulley (403); and an upper end of the push rod (407) is connected to the movable pulley (404). These and other embodiments and variations are more fully disclosed herein.

A protective apparatus and an aerial work device are disclosed. The protective apparatus comprises a bracket (1) and a cover (2); the upper side of the cover (2) is hinged to the upper side of the bracket (1); the protective apparatus further comprises a pull-down apparatus (4); the pull-down apparatus (4) comprises a fixed pulley (403), a movable pulley (404), a push rod (407) and a pull rope (401); the fixed pulley (403) is fixedly connected to the cover (2); the movable pulley (404) is located above the fixed pulley (403); the movable pulley (404) is slidingly connected to the cover (2); a fixed end of the pull rope (401) bypasses the movable pulley (404) and is connected to the fixed pulley (403); and an upper end of the push rod (407) is connected to the movable pulley (404). These and other embodiments and variations are more fully disclosed herein.

An apparatus for window used for moving a sliding window plate between an insertion position to be inserted into an opening portion of a fixed window plate, an extraction position to be extracted from the opening portion, and an open position to be shifted in a slide direction from the extraction position and to uncover the opening portion, includes a rotary member rotatably supported with respect to the sliding window plate; a drive member moved in a predetermined direction with respect to the sliding window plate; a fixation guide configured to convert a movement of the drive member in the predetermined direction with respect to the sliding window plate into a movement of the sliding window plate in an extraction/insertion direction with respect to the fixed window plate; and a wire configured to pull and move the drive member in the predetermined direction.

An apparatus for window used for moving a sliding window plate between an insertion position to be inserted into an opening portion of a fixed window plate, an extraction position to be extracted from the opening portion, and an open position to be shifted in a slide direction from the extraction position and to uncover the opening portion, includes a rotary member rotatably supported with respect to the sliding window plate; a drive member moved in a predetermined direction with respect to the sliding window plate; a fixation guide configured to convert a movement of the drive member in the predetermined direction with respect to the sliding window plate into a movement of the sliding window plate in an extraction/insertion direction with respect to the fixed window plate; and a wire configured to pull and move the drive member in the predetermined direction.

Slide operator assemblies and components for fenestration units, as well as associated methods of manufacture and use thereof.

An assistance apparatus for opening and closing a scissor door for a vehicle includes: a door hinge having one side installed at a vehicle body to be rotated vertically through a hinge shaft, and having a door mounted at an opposite side thereof; a gas lifter having a first side installed at the vehicle body, and having a second side installed at the door hinge to assist a rotational force of the door hinge or keep a posture thereof through compression and elongation; and an opening and closing assistance unit for providing the rotational force to the door hinge in interlocking with the pressing operation of a vehicle passenger.

An assistance apparatus for opening and closing a scissor door for a vehicle includes: a door hinge having one side installed at a vehicle body to be rotated vertically through a hinge shaft, and having a door mounted at an opposite side thereof; a gas lifter having a first side installed at the vehicle body, and having a second side installed at the door hinge to assist a rotational force of the door hinge or keep a posture thereof through compression and elongation; and an opening and closing assistance unit for providing the rotational force to the door hinge in interlocking with the pressing operation of a vehicle passenger.

An improvement in a portable building (B) comprises a ramp door (100) installed in an opening (O) formed in a sidewall (S) of the building. An upper door frame member (106) is hingedly installed to the side of building so to cover the upper end of the ramp door. When the member is in a vertical position, it prevents the ramp door from being lowered; but when the member is rotated to a horizontal position, it unblocks the upper end of the door so the door can be lowered and raised.

An improvement in a portable building (B) comprises a ramp door (100) installed in an opening (O) formed in a sidewall (S) of the building. An upper door frame member (106) is hingedly installed to the side of building so to cover the upper end of the ramp door. When the member is in a vertical position, it prevents the ramp door from being lowered; but when the member is rotated to a horizontal position, it unblocks the upper end of the door so the door can be lowered and raised.

A door apparatus for installing in the vent opening of poultry house can include a transparent or translucent panel positioned within a substantially rectangular frame. The door apparatus can include a handle apparatus attached to the outer surface of the transparent or translucent panel. The handle apparatus can includes an elongate section extending outwardly from the outer surface of the transparent or translucent section having an opening formed therein for receiving an elongate connecting member, such as a cable or cord.