Electrical heater

专利名称：Electrical heater

发明人：Louis P. Steinhauser,Randal A. Schmitz,Hugh

G. Dopplick

申请号：US07/916184申请日：19920717公开号：US05247158A公开日：19930921

摘要：An electrical heater comprising a heating element, a tubular metal sheathsurrounding the heating element and spaced therefrom, insulation inside the sheath forelectrically insulating the heating element from the sheath, and a closure closing one endof the sheath. A passaging extends through the closure in a direction generally

lengthwise of the sheath. At least one power lead adapted for connection to a source ofelectrical energy extends through the passaging for conducting electrical energy to theheating element. The power lead includes an electrical conductor, a metallic sleevesurrounding the conductor, and insulation for electrically insulating the conductor fromthe sleeve. The conductor has a terminal portion electrically connected to the heatingelement. A seal between the closure and the sheath around the one end of the sheathseals against the passage of contaminants between the closure and the sheath. A sealbetween the power lead and the closure seals against the passage of contaminantsthrough the passaging in the closure. The arrangement is such that the closure and theseals seal against the passage of contaminants into or out of the heater through the oneend of the sheath.

申请人：WATLOW ELECTRIC MANUFACTURING COMPANY

代理机构：Senniger, Powers, Leavitt & Roedel

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