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PCE
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DIFF Subgroup
F16K 31/126

the fluid acting on a diaphragm, bellows, or the like (F16K31/145, F16K31/165, F16K31/365, F16K31/385 take precedence)

Introduced: July 1974

Title

Titles differ between systems:

IPC: the fluid acting on a diaphragm, bellows, or the like

CPC: the fluid acting on a diaphragm, bellows, or the like (F16K31/145, F16K31/165, F16K31/365, F16K31/385 take precedence)

Full Title

Full titles differ between systems:

IPC:

Operating means; Releasing devices > actuated by fluid > the fluid acting on a diaphragm, bellows, or the like

CPC:

Operating means; Releasing devices > actuated by fluid ( ; fluid-actuated check valves F16K15/00; fluid-actuated safety valves F16K17/00) > the fluid acting on a diaphragm, bellows, or the like (F16K31/145, F16K31/165, F16K31/365, F16K31/385 take precedence)

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1974.

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