A cattle squeeze chute door opening assembly includes a cattle squeeze chute including a lateral wall that has an open end for having an animal extending therethrough. A door frame is attached to the cattle squeeze chute adjacent to the open end. The door frame includes a door support post spaced from the lateral wall. A space between the lateral wall and the door support post defines an access portal. The door frame including an upper frame member and a lower frame member. A gate is pivotally couple to door support post and is positionable in an open position or in a closed position. The gate has a lower edge positioned adjacent to the lower frame member. A foot actuator is mounted on the door frame. The gate is lifted upwardly and moved from a closed position to an open position when the foot actuator is actuated.

A ramp door closure apparatus is provided for recreational vehicles, having a recessed linear actuator both draw a cable from a mounting bracket on the ramp door adjacent to the RV opening, to raise and lower the ramp door, and then cam a locking pin fixed to the ramp door into a seal tight position after the ramp door is raised. Upon release of the locking pin from the cam when opening the door, an initial push is provided to facilitate downward rotation of the ramp door. The linear actuator is selectively detachable from the cable so as to allow manual raising and lowering of the ramp door from within the RV, by means of releasable pins accessed in the mounting structure.

A double door gate apparatus having a frame, a main gate and a secondary gate, where the apparatus includes the unique features of a) a latch apparatus between uppermost framework members of the main gate and secondary gate, b) the latch apparatus being weighted to return to a normally closed position, c) each of the main gate and secondary gates having an inverted U-shaped piece engaging the bottommost horizontal member such that each of the main and secondary gates need to be lifted prior to being opened and prior to being closed, and d) a pair of hand wheels on a common shaft that work together to space the double door gate apparatus a desired distance from a vertical surface such as a wall.

A double door gate apparatus having a frame, a main gate and a secondary gate, where the apparatus includes the unique features of a) a latch apparatus between uppermost framework members of the main gate and secondary gate, b) the latch apparatus being weighted to return to a normally closed position, c) each of the main gate and secondary gates having an inverted U-shaped piece engaging the bottommost horizontal member such that each of the main and secondary gates need to be lifted prior to being opened and prior to being closed, and d) a pair of hand wheels on a common shaft that work together to space the double door gate apparatus a desired distance from a vertical surface such as a wall.

A door assembly includes a door positionable within an opening defined in a wall, a bottom seal mounted to one of a bottom of the door and an underlying surface to generate a sealed interface at the underlying surface when the door is in a closed position, and a linkage operatively coupled to the door and actuatable to lift the door upwardly relative to the underlying surface and thereby separate the bottom seal from the other of the bottom of the door and the underlying surface.

A double door gate apparatus having a frame, a main gate and a secondary gate, where the apparatus includes the unique features of a) a latch apparatus between uppermost framework members of the main gate and secondary gate, b) the latch apparatus being weighted to return to a normally closed position, c) each of the main gate and secondary gates having an inverted U-shaped piece engaging the bottommost horizontal member such that each of the main and secondary gates need to be lifted prior to being opened and prior to being closed, and d) a pair of hand wheels on a common shaft that work together to space the double door gate apparatus a desired distance from a vertical surface such as a wall.

A double door gate apparatus having a frame, a main gate and a secondary gate, where the apparatus includes the unique features of a) a latch apparatus between uppermost framework members of the main gate and secondary gate, b) the latch apparatus being weighted to return to a normally closed position, c) each of the main gate and secondary gates having an inverted U-shaped piece engaging the bottommost horizontal member such that each of the main and secondary gates need to be lifted prior to being opened and prior to being closed, and d) a pair of hand wheels on a common shaft that work together to space the double door gate apparatus a desired distance from a vertical surface such as a wall.

A double door gate apparatus having a frame, a main gate and a secondary gate, where the apparatus includes the unique features of a) a latch apparatus between uppermost framework members of the main gate and secondary gate, b) the latch apparatus being weighted to return to a normally closed position, c) each of the main gate and secondary gates having an inverted U-shaped piece engaging the bottommost horizontal member such that each of the main and secondary gates need to be lifted prior to being opened and prior to being closed, and d) a pair of hand wheels on a common shaft that work together to space the double door gate apparatus a desired distance from a vertical surface such as a wall.

A double door gate apparatus having a frame, a main gate and a secondary gate, where the apparatus includes the unique features of a) a latch apparatus between uppermost framework members of the main gate and secondary gate, b) the latch apparatus being weighted to return to a normally closed position, c) each of the main gate and secondary gates having an inverted U-shaped piece engaging the bottommost horizontal member such that each of the main and secondary gates need to be lifted prior to being opened and prior to being closed, and d) a pair of hand wheels on a common shaft that work together to space the double door gate apparatus a desired distance from a vertical surface such as a wall.

A door assembly for an aircraft includes a door, a door handle, a door hinge, a support assembly, and a lifting assembly. The door handle is rotatable between an unlatched position and a latched position. The support assembly rotatably mounts the door hinge to the door. The lifting assembly includes a latch cam, a lift track, and a latch idler. The latch cam is mounted to the door handle. The latch cam is rotatable with the door handle about the door handle rotational axis. The latch cam forms an eccentric roller path extending about the door handle rotational axis. The latch idler includes a first roller and a second roller. The first roller is disposed on a lift track of the support assembly and configured to roll along the lift track. The second roller is disposed within the eccentric roller path. The latch idler is mounted to the door. The latch idler is configured to lift the door as the door handle rotates from the latched position to the unlatched position.