Locking hinge assembly

A locking hinge, comprising:

• a first hinge plate configured for securely connecting to a first support surface and having a plurality of spaced-apart first sleeves, each sleeve defining a passageway coaxially aligned with the passageways of adjacent sleeves, and at least one of said sleeves having a first portion with a first inner wall surface and a second portion with a second inner wall surface, the first inner wall surface of the first sleeve defining a spline with a first diameter and the second inner wall surface having a second diameter less that the first diameter;
• a second hinge plate configured for securely connecting to a second support surface and having a plurality of spaced-apart second sleeves, each second sleeve defining a passageway coaxially aligned with the passageways of adjacent second sleeves, and at least one of said second sleeves having a first portion with a first inner wall surface and a second portion with a second inner wall surface, the second inner wall surface of the second sleeve defining a spline with the first diameter and the first inner wall surface of the second sleeve having the second diameter less that the first diameter;
• the first sleeves and the second sleeves arranged for being disposed in alternating sequence when the first hinge plate and second hinge plate are disposed with the respective sleeves coaxially aligned, the aligned sleeves disposed in alternating sequence;
• a hinge pin received in the aligned passageways on which the first and the second hinge plates pivot so that the first and second support surfaces rotate relative to each other, the hinge pin defining at least a first and a second spline portion spaced-apart thereon for aligning with the first inner wall surface of the first sleeve and the second inner wall surface of the second sleeve respectively when the hinge pin is in a first position and the first and the second spline portion aligning with the second inner wall surface of the first sleeve and the first inner wall surface of the second sleeve when the hinge pin is in a second position;
• means for biasing the hinge pin in the first position;
• and
• a latch movable between a first position to a second position to hold the hinge pin in the second position.

A locking hinge assembly, comprising:

• a first hinge member having a hinge plate configured for attaching to a support surface and a sleeve bushing extending from an edge of the hinge plate, the sleeve bushing defining a through passageway and having a first diameter, and defining at least one tooth channel with at least opposing side walls and open to the passageway, the tooth channel having an arcuate width between opposing sides walls that define an opposing pair of stops;
• a second hinge member having a hinge plate configured for attaching to a second support surface and a sleeve bushing extending from an edge of the hinge plate and defining a through passageway, for co-axial alignment of the sleeve bushings;
• an elongated splined pin received in the aligned sleeve bushings, the pin having a root diameter and at least one tooth projecting therefrom to define a major diameter and configured for being received selectively in the tooth channel, the tooth having a width less than the arcuate width of the tooth channel, whereby the pin has an arcuate range for relative movement limited by the stops upon contact by the tooth,
• whereby the tooth being received in the tooth channel permits rotational movement of the sleeve bushings relative to each other, until the pin is stopped by one of the side walls of the tooth channel.