Patent ID: 8590367
Filing Date: 2013-11-26
Classification: F16K,G01D,G01N,Y10T

Abstract:
1. A portable Brinell metal hardness tester having a test head mounted in a carriage and movable vertically along elevating screws, for applying preselected force to a test piece by pumping of hydraulic fluid by manual movement of a pumping lever to apply hydraulic fluid pressure of a prescribed level to a ball contacting a test piece, comprising: (a) an adjustable valve for relieving hydraulic fluid pressure within the test head upon reaching an adjustably selected level, comprising: (b) a handle for a manually actuable valve for releasing hydraulic pressure within the test head, the handle comprising: (c) a valve tampering detector, comprising: (d) a stroke limiter for limiting movement of the pumping lever, comprising: