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US 9,428,951 B2Granted
Tilt-up door
AssigneeHP Doors, LLC
InventorRoland W. Betker
Life of this patent
Estimating the term…
Abstract
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.
Claims26
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.
7 more elements
A tilt-up door system for a building having an opening comprising:
- a door frame comprising a pair of vertically juxtaposed members each defining a vertical track;
- at least one first cam extending generally laterally from at least one of the vertical tracks at an upper portion thereof;
- wherein the at least one first cam has a first steep inclined segment, a second inclined segment and a third segment;
- a door having an inside and an outside sized to span the opening having a top, a bottom and at least one vertical side member, the at least one vertical side member having a horizontally extending pivot shaft tube positioned vertically between the top and bottom of the door, and at least one cam follower extending laterally from an upper portion of the door in register with the at least one first cam;
- at least one carriage including a pivot shaft journal positioned vertically between the top and bottom of the door being arranged for vertical movement along one of the vertical tracks;
- at least one horizontally extending pivot shaft connecting the pivot shaft tube to the pivot shaft journal;
- whereby when the door is placed in alignment with the opening in a closed, lowered position, the at least one carriage is disposed within one of the vertical tracks and the at least one cam follower is located adjacent to the at least one first cam, and an upwardly-directed motive force acts upon the at least one carriage, the at least one cam follower comes into abutment with the first steep inclined segment of the at least one first cam which moves the door generally vertically, then into abutment with the second inclined segment of the at least one first cam which rotates the upper portion of the door inwardly, and then into abutment with the third segment of the at least one first cam to bring the door into an opened, raised position.
4 more elements
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;
- at least one first cam having a first end and a second end, the at least one first cam extending generally laterally from at least one of the vertical tracks at the upper portion thereof with the first end adjacent the vertical track, and comprising at least an inclined generally linear segment;
- a door having an inside and an outside sized to span the opening having a top, a bottom and at least one vertical side member, the at least one vertical side member having a horizontally extending pivot shaft tube positioned vertically between the top and bottom of the door, and at least one cam follower extending laterally from an upper portion of the door in register with the at least one first cam;
- at least one carriage including a horizontally extending pivot shaft journal positioned vertically between the top and bottom of the door, the at least one carriage being arranged for vertical movement along one of the vertical tracks;
- at least one horizontally extending pivot shaft connecting the pivot shaft tube to the pivot shaft journal;
- an actuator comprising at least one vertically extending hydraulic cylinder mounted adjacent one of the first and second vertically juxtaposed members and connected to the at least one carriage operable to move the at least one carriage along one of the vertical tracks;
- a hydraulic circuit including at least one hydraulic pump, a motor for operating the hydraulic pump and a hydraulic fluid tank;
- whereby, when the at least one hydraulic pump is operated hydraulic fluid is pumped into the at least one hydraulic cylinder to move the at least one carriage vertically along one of the vertical tracks.
5 more elements
Dependencies are inferred from the claim text.