Patent ID: 11920878
Assignee: WATLOW ELECTRIC MANUFACTURING COMPANY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | 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, the first longitudinal length being less than a full longitudinal length of the geometric helicoid; and
a plurality of electrical resistance heating elements extending through the perforations,
wherein, for each electrical resistance heating element of the plurality of electrical resistance heating elements, a length of that electrical resistance heating element and a pitch of the geometric helicoid at a distal end of that electrical resistance heating element are such that the distal end of that electrical resistance heating element is a distance X from the geometric helicoid at the distal end of that electrical resistance heating element, wherein the distance X is taken along the longitudinal direction and is less than or equal to 40% of the pitch of the geometric helicoid at the distal end of that electrical resistance heating element.