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Class 470/93 - And side swagger


Subclass of Class 470 - Threaded, headed fastener, or washer making: process and apparatus
Definition: Subject matter further provided with two mechanisms for
No. of patents: 1
Last issue date: 07/03/1990


NumberTitleIssue Date
4937914Door control device
The piston of a door control device is assembled from a channel and cups welded on to opposite ends of the channel. A valve assembly is mounted in one of the cups. Rollers extend between opposite sides of the channel and co-operate with teeth on a rotatab... 		07/03/1990
 
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