US 12,227,950 B2
Attic stair apparatus
Edwin W. Ingalls, The Villages, FL (US)
Filed by Edwin W. Ingalls, The Villages, FL (US)
Filed on Oct. 18, 2023, as Appl. No. 18/381,585.
Claims priority of provisional application 63/417,188, filed on Oct. 18, 2022.
Prior Publication US 2024/0191509 A1, Jun. 13, 2024
Int. Cl. E04F 11/06 (2006.01); E04F 11/04 (2006.01); E04F 11/18 (2006.01)
CPC E04F 11/062 (2013.01) [E04F 11/04 (2013.01); E04F 11/06 (2013.01); E04F 11/068 (2013.01); E04F 11/18 (2013.01); E04F 11/064 (2013.01); E04F 11/066 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An attic stair apparatus for installation at an installation site in an attic or a garage, the attic stair apparatus comprising:
a stair assembly having a stair assembly upper portion and a stair assembly lower portion, the stair assembly comprising:
a left stringer;
a right stringer;
a plurality of stairsteps; and
a backing
a left-hand spring mount fixedly connected to the left stringer at the upper portion of the stair assembly;
a right-hand spring mount fixedly connected to the right stringer at the upper portion of the stair assembly;
a railing assembly comprising;
a left railing having a left railing upper end and a left railing lower end;
a right railing having an upper end being fixedly connected to the right-hand spring mount and a right railing lower end being fixedly connected to the right stringer at the lower portion of the stair assembly;
a hinge assembly comprising:
a left hinge pivotally mounted to the left-hand spring mount, the left hinge comprising a left gas spring, a left male clevis, a left female clevis and a left fixed mount;
a right hinge pivotally mounted to the right-hand spring mount, the right hinge comprising a right gas spring, a right male clevis, a right female clevis and a right fixed mount;
a stationary adjustable joist plate and a sliding adjustable joist plate; a left stringer plate and a right stringer plate;
a joist plate;
a clamping two-piece shaft collar; a merchant coupler; and
a first left pipe mounted between the shaft collar and the merchant coupler, and a second right pipe mounted between the merchant coupler and the joist plate.