Abstract: A high-speed sectional overhead door covers a door opening with panels stacked in a single plane and lifted from the bottom-most panel. As panels are lifted, each rolls in its own individual track. As the panels move into the head area, they run through curved tracks and are nested there. The stored panels stacked horizontally one atop another with the door open. This design utilizes a dedicated panel-track pairing as well as a unique hook/cam device which allows for the upper panel to be both locked in the closed position and pushed away for separation and storage in the open position.

Abstract: A high-speed sectional overhead door covers a door opening with panels stacked in a single plane and lifted from the bottom-most panel. As panels are lifted, each rolls in its own individual track. As the panels move into the head area, they run through curved tracks and are nested there. The stored panels stacked horizontally one atop another with the door open. This design utilizes a dedicated panel-track pairing as well as a unique hook/cam device which allows for the upper panel to be both locked in the closed position and pushed away for separation and storage in the open position.

Abstract: Disclosed herein is a ratcheting, self-aligning load-lifting device featuring a ram, responsive to a pressurized medium, having at least one rack of teeth and a keyway slot, and a ratchet mechanism encircling the ram. The ratchet mechanism has at least one pawl for engagement with the rack of teeth during elevation of the ram, a set screw extending into the keyway to maintain proper alignment of the mechanism, a spring plunger radially positioned for engagement with the keyway slot after the ratchet mechanism has been rotated and the pawl has been released from the elevated rack of teeth, and a biasing means positioned within and attached to rotate the ratchet mechanism thereby urging the re-engagement of the pawl with the lowered rack of teeth.

Abstract: Disclosed herein is a ratcheting, self-aligning load-lifting device featuring a ram, responsive to a pressurized medium, having at least one rack of teeth and a keyway slot, and a ratchet mechanism encircling the ram. The ratchet mechanism has at least one pawl for engagement with the rack of teeth during elevation of the ram, a set screw extending into the keyway to maintain proper alignment of the mechanism, a spring plunger radially positioned for engagement with the keyway slot after the ratchet mechanism has been rotated and the pawl has been released from the elevated rack of teeth, and a biasing means positioned within and attached to rotate the ratchet mechanism thereby urging the re-engagement of the pawl with the lowered rack of teeth.