Abstract: The present disclosure relates to prosthesis systems having trays and liners having an asymmetrical locking mechanism to bias the strength of the liner to resist loading forces and associated methods. The tray has a lateral groove disposed in an inner surface of a lateral circumferential portion of the tray and a medial groove disposed in an inner surface of a medial circumferential portion of the tray. The liner has an upper segment and a lower segment. The liner has a locking portion for lockingly engaging the tray that includes the lower segment. The locking portion has a lateral toe positioned generally diametrically opposite a plurality of resiliently deformable medial fingers defined therein. The liner and the tray are engageable in a lateral-to-medial direction so that the plurality of medial fingers can resiliently deform to engage the medial groove subsequent to engagement of the lateral toe within the lateral groove.

Abstract: The present invention is a variable flow, multiple pass heat exchanger for use in heating various liquids to include cooking oils. The apparatus is comprised of metallic tubing disposed in a baffled stacked configuration disposed within a combustion chamber or other heating element. The tubular configuration is disposed so as to permit the passage of fluid back and forth across the heating element in an upwardly direction and then to repeat this movement in a downwardly direction through a second tubular configuration. The device is capable of being constructed to permit as many passages as are necessary to achieve the desired result. Flow is controlled by varying the number of the tubular members between sucessive tube layers.