Tilt-up door

摘要

A tilt-up door for a building having an opening including a door frame with vertical track members, cam surfaces extending laterally from the vertical tracks at the upper portion of the tracks and a door sized to span the opening. The door can be pivotally coupled with rollers disposed within the vertical tracks and cam followers extending laterally from the upper portion of the door to contact the cam surfaces. The cams can include a first steep inclined segment, a second inclined segment and a third segment. When an upwardly directed motive force acts on the door the cam followers come into engagement with the cam surface to lift the door generally vertically and then rotate the door inwardly as the door is raised into an open raised position.

主权项

1. A tilt-up door system for a building having an opening comprising:
a door frame comprising first and second vertically juxtaposed members each defining a vertical track having an upper portion and a lower portion; a pair of first cams each extending generally laterally from respective ones of the juxtaposed members at the upper portion thereof, wherein the first cams each have a first steep inclined segment, a second inclined segment and a third generally horizontal segment; a door having an inside and an outside sized to span the opening having a top, a bottom and at least two vertical side members, the at least two vertical side members each having a horizontally extending pivot shaft tube positioned vertically between the top and bottom of the door, and a cam follower extending laterally from an upper portion of each of the at least two vertical side members in register with respective ones of the first cams; first and second carriages each including a horizontally extending pivot shaft journal, each of the carriages being arranged for vertical movement along respective ones of the vertical tracks; a pair of horizontally extending pivot shafts, each pivot shaft pivotally connecting a pivot shaft tube to a pivot shaft journal; and an actuator comprising vertically extending first and second hydraulic cylinders each mounted adjacent one of the first and second vertically juxtaposed members and connected to respective ones of the first and second carriages operable to move the first and second carriages along respective ones of the first and second juxtaposed members; a hydraulic circuit including at least one hydraulic pump, a motor for operating the hydraulic pump, and a hydraulic fluid tank; and whereby when the at least one hydraulic pump is operated hydraulic fluid is pumped into the first and second hydraulic cylinders to move the first and second carriages vertically along respective ones of the first and second juxtaposed members.