Class 29/442 - Allowing assembled sphere to move in single plane only

Subclass of Class 29 - Metal working
Definition: Process under subclasses 441.1+ wherein the parts
No. of patents: 4
Last issue date: 11/08/2011

Number	Title	Issue Date
8051546	Method for determining if a fuel cell stack is overheating using stack end plate temperature sensors A method for determining whether a fuel cell stack is overheating. The method measures the temperature of end cells in the stack using end cell temperature sensors, and calculates an average end cell temperature based on the end cell temperature measurements. The me...	11/08/2011
5325586	Double row angular contact ball bearings and a method for the manufacture thereof A double row, angular contact ball bearing comprised of an integral inner race ring and an integral outer race ring, the outer race ring having at least one circumferential depressing between the rows of balls and the inner race ring having a circumferent...	07/05/1994
4278278	Means for tensioning tubing in a wellhead assembly A tubing string (86) is connected at its upper end to a hanger (42) and has its lower end anchored within an outer casing. The hanger and tubing string are lifted from a position below the wellhead assembly to tension the tubing string a desired amount. T...	07/14/1981
4118610	Snap action switch blades A snap action switch blade has a basic `Q` shape with two arms interconnected and drawn together by a bridge portion, which may be integral with the arms, to form a deformed loop capable of snap movement between two configurations, with respective tongues...	10/03/1978

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