| 主权项 |
1. A cryogenic freezer, comprising:
a conveyor support system that comprises a plurality of conveyor rail supports spaced longitudinally and arranged in parallel, a plurality of upper conveyor support rails spaced latitudinally and arranged in parallel but perpendicular to the conveyor rail supports, and a plurality of lower conveyor support rails spaced latitudinally and arranged in parallel but perpendicular to the conveyor rail supports, wherein:
each of the plurality of conveyor rail supports comprises parallel spaced vertically extending first and second support members, an upper bar connected to and extending between the first and second support members that has a plurality of notches formed into an upper side thereof, a lower bar parallel to the upper bar being connected to and extending between the first and second support members underneath the upper bar that has a plurality of notches formed into an upper side thereof, a first leg integral with and extending latitudinally away from the first support member, and a second leg integral with and extending latitudinally away from the second support member;the plurality of upper conveyor support rails are adapted and configured to support travel of an upper portion of an endless conveyor;the plurality of lower conveyor support rails are adapted and configured to support travel of a lower portion of an endless conveyor; andeach of the first legs comprises a foot extending latitudinally upward and outward with respect to an interior of the cryogenic freezer at an angle to horizontal;each of the second legs comprises a foot extending latitudinally upward and outward with respect to the interior of the cryogenic freezer at an angle to horizontal;each of the upper conveyor support rails is engaged, nestled and held by friction and gravity without any fasteners by the notches formed in the upper bars;each of the lower conveyor support rails is engaged, nestled and held by friction and gravity without any fasteners by the notches formed in the lower bars; an endless conveyor extending between and around a set of rollers and an endless conveyor drive operatively associated with and adapted and configured to drive the endless conveyor, an upper portion of the endless conveyor being supported by the upper conveyor support rails, a lower portion of the endless conveyor being supported by the lower conveyor support rails; a lower housing having first and second side walls, upper surfaces of the lower housing side walls optionally being provided with a gasket, either the upper surfaces of the lower housing side walls or the optional gaskets supporting the angled feet of the first and second legs of the conveyor rail supports, respectively, without the use of fasteners; an upper housing having first and second side walls aligned with the first and second side walls of the lower housing; and a liquid cryogen delivery system comprising liquefied gas piping connected to a liquefied gas injection manifold disposed above the endless conveyor in an interior of the upper housing, wherein:
the upper surfaces of the lower housing side walls are adapted and configured to conform to lower surfaces of the upper housing side walls so as to provide a thermal seal between the upper and lower housings when the freezer is in a closed state;the upper surface of the first side wall of the lower housing is angled downwardly inward with respect to the interior of the cryogenic freezer to correspond with the angle to which the feet of the first legs extend so that there is clearance for the feet of the first legs between the upper and lower housings when the freezer is in the closed state;the upper surface of the second side wall of the lower housing is angled downwardly inward with resect to the interior of the cryogenic freezer to correspond with the angle to which the feet of the second legs extend so that there is clearance for the feet of the second legs between the upper and lower housings when the freezer is in the closed state. |
