TILT-UP DOOR

摘要

A tilt-up door for a building having an opening, a pair of substantially vertically juxtaposed members, cam surfaces extending laterally from the vertical members at the upper portion and a door sized to span the opening. The door can be pivotally coupled to carriages arranged for vertical movement along the vertical members and can have cam followers extending laterally from the upper portion of the door to contact the cam surfaces. Hydraulic actuators can be connected to the carriages to move the carriages along the vertical members. When the actuator or actuators are operated to move the carriages vertically along the members the cam followers can move along the cam surfaces to tilt the door to a horizontal position as the door is moved vertically upward into an open raised position.

主权项

1. A tilt-up door system for a building having an opening comprising:
first and second juxtaposed members having upper and lower portions extending substantially vertically along opposite sides of the opening; 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; 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 first and second juxtaposed members; 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 first and second juxtaposed members and connected to one of the first and second carriages operable to move the first and second carriages along respective ones of the first and second juxtaposed members, the first and second hydraulic cylinders each comprising:
a supply port;a flow control valve connected to the supply port; anda solenoid check valve connected to the flow control valve and the hydraulic cylinder; a hydraulic pump, a motor for operating the hydraulic pump, and a hydraulic fluid tank; and a hydraulic circuit connecting the hydraulic pump and the supply ports of the first and second hydraulic cylinders; whereby, when the hydraulic pump is operated hydraulic fluid is pumped into the first and second hydraulic cylinders move the first and second carriages vertically along respective ones of the first and second juxtaposed members.