Patent ID: 11920878
Assignee: WATLOW ELECTRIC MANUFACTURING COMPANY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. The heater assembly according to claim 2 further comprising:
a tubular body including a first inlet/outlet open into an interior of the tubular body at a first end portion of the tubular body, and a second inlet/outlet open into the interior of the tubular body at a second end portion of the tubular body,
wherein the flow guide is disposed within the tubular body such that the geometric helicoid and the tubular body define a helical flow path between the first inlet/outlet and the second inlet/outlet, and
wherein the plurality of distinct sets of electrical resistance heating elements are arranged such that the distinct sets progressively extend farther in the longitudinal direction with increased position along the helical flow path.