Systems and methods for sealing a compartment

A system for sealing a compartment, the system comprising:

• a door having a top surface, a bottom surface opposite the top surface, a first side surface, and a second side surface opposite the first side surface;
• a seal positioned on the bottom surface of the door;
• and
• one or more hinges coupled to the door, wherein each of the one or more hinges comprises:
• a first plate coupled to the first side surface of the door;
• a second plate configured to be coupled to a stationary component adjacent the first side surface of the door such that the first plate is configured to rotate with respect to the second plate as the door rotates from a closed position to an open position;
• a first knuckle coupled to the first plate, wherein the first knuckle includes a first through-hole, and wherein the first knuckle includes a first helical cam surface having a first portion having a first helical slope and a second portion having a second helical slope that is different from the first helical slope;
• a second knuckle coupled to the second plate, wherein the second knuckle includes a second through-hole, and wherein the second knuckle includes a second helical cam surface having a first portion having the first helical slope and a second portion having the second helical slope, and wherein the second helical cam surface of the second knuckle is configured to contact the first helical cam surface of the first knuckle;
• and
• a pin positioned through the first through-hole of the first knuckle and the second through-hole of the second knuckle to thereby rotatably couple the first knuckle to the second knuckle,
• wherein a height of the door with respect to a floor surface increases in response to a rotation of the door from the closed position to the open position, and
• wherein the seal transitions from a compressed state to a relaxed state in response to the rotation of the door from the closed position to the open position,
• wherein the first helical cam surface includes a first friction component with a remaining portion of the first helical cam surface being smooth, and wherein the second helical cam surface includes a second friction component with a remaining portion of the second helical cam surface being smooth, wherein the second friction component is configured to interact with the first friction component to stop the rotation of the door between the closed position and the open position.

A hinge comprising:

• a first plate;
• a second plate configured to rotate with respect to the first plate as the hinge rotates from a closed position to an open position;
• a first knuckle coupled to the first plate, wherein the first knuckle includes a first through-hole, and wherein the first knuckle includes a first helical cam surface having a first portion having a first helical slope and a second portion having a second helical slope that is different from the first helical slope;
• a second knuckle coupled to the second plate, wherein the second knuckle includes a second through-hole, and wherein the second knuckle includes a second helical cam surface having a first portion having the first helical slope and a second portion having the second helical slope, and wherein the second helical cam surface of the second knuckle is configured to contact the first helical cam surface of the first knuckle;
• and
• a pin positioned through the first through-hole of the first knuckle and the second through-hole of the second knuckle to thereby rotatably couple the first knuckle to the second knuckle,
• wherein a gap between the first helical cam surface and the second helical cam surface increases at a first rate with respect to a first rotation of the hinge from the closed position to an intermediate position as the first portion of the first helical cam surface moves against the first portion of the second helical cam surface, and
• wherein the gap between the first helical cam surface and the second helical cam surface increases at a second rate with respect to a second rotation of the hinge from the intermediate position toward the open position as the second portion of the first helical cam surface moves against the second portion of the second helical cam surface, wherein the first rate is greater than the second rate.

A method for sealing a compartment, the method comprising:

• coupling a first plate of a hinge to a first side surface of a door;
• coupling a second plate of the hinge to a stationary component adjacent the first side surface of the door, wherein the hinge further includes (i) a first knuckle coupled to the first plate, wherein the first knuckle includes a first helical cam surface having a first portion having a first helical slope and a second portion having a second helical slope that is different from the first helical slope, and (ii) a second knuckle coupled to the second plate, wherein the second knuckle includes a second helical cam surface having a first portion having the first helical slope and a second portion having the second helical slope, and wherein the second helical cam surface of the second knuckle is configured to contact the first helical cam surface of the first knuckle;
• performing a first rotation of the door via the hinge from an open position to an intermediate position, wherein a height of the door with respect to a floor surface decreases at a first rate with respect to the first rotation of the door as the second portion of the first helical cam surface moves against the second portion of the second helical cam surface;
• performing a second rotation of the door via the hinge from the intermediate position to a closed position, wherein the height of the door with respect to the floor surface decreases at a second rate with respect to the second rotation of the door as the first portion of the first helical cam surface moves against the first portion of the second helical cam surface, wherein the first rate is less than the second rate;
• and
• transitioning a seal positioned on a bottom surface of the door from a relaxed state to a compressed state in response to the rotation of the door from the open position to the closed position to thereby seal the compartment.