An improvement in a portable building (B) comprising a door ramp (10) installed in an opening (O) formed in a sidewall (S) of the building. A ramp door (12) fits in the opening and is hingedly attached to the building. A handle (16) is attached to an exterior surface (12o) of the door allows a user to lower and raise the door with a mechanism (18) facilitating lowering and raising the door in a controlled manner. A panel (32) mounted to the interior top portion of the door extends outwardly as the door is fully lowered to rest on the ground and complete formation of a ramp by items can be brought into or removed from the building.

A vehicle enclosure system may include a top rail and a bottom rail coupled to a side of a vehicle. The vehicle enclosure system may also include a housing coupled to the side of the vehicle. The housing may include a covering coupled to at least one handle. The at least one handle may be configured to facilitate a movement of the covering by a user. The housing may include a roller configured to facilitate the movement and storage of the covering. The vehicle enclosure system may include a rear cover assembly coupled to the housing and the covering. The covering may enclose an interior of the vehicle and extend the rear cover assembly simultaneously when the covering is moved to a deployed position. The covering may expose the interior of the vehicle and store the rear cover assembly simultaneously when the covering is moved to a storage position.

A skylight or roof hatch that is manually opened and closed. The skylight is formed of a window mounted to a casing frame by way of one or more hinges, which allows the window to open and close. One or more gas springs mounted between the window and casing frame are configured to exert force against the inside of the window. The gas springs are used to urge the window into an open position. Once in the open position, the window is closed by overcoming the biasing force exerted by the gas springs. This is achieved by winding in a cable that is connected to the window. A single pulley wheel that is mechanically linked to other mechanical elements is utilized to spool in the cable connected to the window in order to close the window and to unlock a reel lock to allow for automatic opening of the window.

A skylight or roof hatch that is manually opened and closed. The skylight is formed of a window mounted to a casing frame by way of one or more hinges, which allows the window to open and close. One or more gas springs mounted between the window and casing frame are configured to exert force against the inside of the window. The gas springs are used to urge the window into an open position. Once in the open position, the window is closed by overcoming the biasing force exerted by the gas springs. This is achieved by winding in a cable that is connected to the window. A single pulley wheel that is mechanically linked to other mechanical elements is utilized to spool in the cable connected to the window in order to close the window and to unlock a reel lock to allow for automatic opening of the window.

An assisting system for closing a driver's door in a vehicle, especially in a heavy-duty vehicle, comprising a pedal movable between a high position and a low position; a door check strap arranged in the driver's door and configured to be able to act on a degree of opening of the driver's door; and a connecting cable for linking the pedal to the door check strap, the door check strap being configured such that when the pedal moves from the high position to the low position, the connecting cable pulls part of the door check strap so that the driver's door moves from a maximum open position to a closed position or to an intermediate open position.

An assisting system for closing a driver's door in a vehicle, especially in a heavy-duty vehicle, comprising a pedal movable between a high position and a low position; a door check strap arranged in the driver's door and configured to be able to act on a degree of opening of the driver's door; and a connecting cable for linking the pedal to the door check strap, the door check strap being configured such that when the pedal moves from the high position to the low position, the connecting cable pulls part of the door check strap so that the driver's door moves from a maximum open position to a closed position or to an intermediate open position.

A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

The method of door control without, hand contact, wherein, when the door leaf is in its stationary closed position, all the energy necessary for automatic opening and subsequent closing the door leaf, initiated by an actuating force, preferably realized by means of a foot lever, is accumulated in an opening and closing mechanism during the actuating action of the controlling mechanism. During the automatic opening, the only acting force is the tension of the opening member, and during the subsequent automatic closing, the only acting force is the tension of the closing member. By means of the bimodal opening and closing mechanism, the tensions of these two members act separately, not against each other.

The method of door control without, hand contact, wherein, when the door leaf is in its stationary closed position, all the energy necessary for automatic opening and subsequent closing the door leaf, initiated by an actuating force, preferably realized by means of a foot lever, is accumulated in an opening and closing mechanism during the actuating action of the controlling mechanism. During the automatic opening, the only acting force is the tension of the opening member, and during the subsequent automatic closing, the only acting force is the tension of the closing member. By means of the bimodal opening and closing mechanism, the tensions of these two members act separately, not against each other.