Gm Global Technolgoy Operations, Inc.

Gary F Stack

Michael P Murphy

Richard G Dent

John R Taylor

James W Hoppenrath

A sheathed electric heater especially of the type used as diesel engine glow plugs has a dual coil heating element including separate tip heater and PTC body control coils thermally isolated by a low resistance connector section made from interengaging small diameter coiled connector portions integral with the tip and body coils and preferably welded together. Preferred material and dimensional specifications and pertinent design considerations are also included.

Quick heat self regulating electric glow heater

A pressure vessel having a band compressed onto a lockseam to angle the latter under an end plate for increased seam strength.

Pressure vessel

An oil filter having an elastomeric anti-drainback valve with an integral flap that deflects within the tolerance stack-up of the assembled filter parts to effect sealing in lieu of requiring, for example, the conventional metal spring bias.

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Holly, MI, United States of America

Gary F Stack