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US 9,206,634 B1Granted
Counterbalance system for vertical acting doors
AssigneeOverhead Door Corporation
InventorsJorge Manuel Prieto, Mark Daus, Charles A. Haba
Life of this patent
Estimating the term…
Abstract
A counterbalance system for an upward acting door including a first casing and a second casing. Each casing includes a spring element disposed therein operable to store and release potential energy in response to movement of the upward acting door between open and closed positions. The first casing is interlockable with the second casing to accommodate and counterbalance upward acting doors of differing weights.
Claims26
A counterbalance system for an upward acting door, the system comprising:
- a rotatable shaft;
- a first casing and a second casing disposed on the rotatable shaft, each casing having an elongate sidewall with opposing first and second end walls to receive a spring element therein, the spring element storing and releasing potential energy in response to rotation of the shaft and movement of the upward acting door between open and closed positions;
- and
- an extending member extending from the first end wall of the first casing,
- wherein the first casing interlocks with the second casing by aligning the extending member with a first opening on the second end wall of the second casing to counterbalance a weight of the upward acting door, the first opening spaced apart from a second opening that comprises a central axis of the second casing.
2 more elements
A counterbalance unit for an upward acting door, comprising:
- a casing comprising an elongate sidewall with opposing first and second end walls and at least one connector extending outwardly from one of the first and second end walls of the casing to interlock the casing with a corresponding opening disposed on an end wall of a second casing to prevent relative rotational movement of the casing with respect to the second casing, the opening parallel to and spaced apart from a second opening that comprises a central axis;
- a rotatable arbor positioned within the second opening;
- and
- a spring element having a first and second end, the first end of the spring element secured to the rotatable arbor and a second end of the spring element secured to the casing such that in response to movement of the upward acting door between open and closed positions, the arbor rotates and the spring element stores or releases potential energy to counter a weight of the upward acting door.
1 more element
Dependencies are inferred from the claim text.