DIFF Subgroup
G01M 3/32 for containers, e.g. radiators
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Investigating fluid tightness of structures > by using fluid or vacuum > by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors > for containers, e.g. radiators
CPC:
Investigating fluid-tightness of structures > by using fluid or vacuum > by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors > for containers, e.g. radiators
CPC subdivides this area 6x more granularly than IPC with 5 additional codes.
5 codes are CPC-only extensions.
Child Classifications
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- G01M 3/34 by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines IPC+CPC Available in IPC and CPC