Patent ID: 11913736
Assignee: WATLOW ELECTRIC MANUFACTURING COMPANY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  H | IPC F

Claim 0:
1. A heater assembly comprising:
a flow guide defining a continuous geometric helicoid disposed about a longitudinal axis of the heater assembly, the flow guide defining a predetermined pattern of perforations that extend in a longitudinal direction through a first longitudinal length of the geometric helicoid, the longitudinal direction being parallel to the longitudinal axis; and
a plurality of electrical resistance heating elements extending through the perforations, at least one electrical resistance heating element of the plurality of electrical resistance heating elements has a first region with a first watt density and a second region with a second watt density, the second region being located farther in the longitudinal direction than the first region, the second watt density being less than the first watt density, wherein an end portion of the at least one electrical resistance heating element includes a majority of the second region, wherein the end portion does not extend through the perforations.