US PATENT SUBCLASS 137 / 69
.~.~ With counterbalancing element

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


137 /   HD   FLUID HANDLING

67  DF  DESTRUCTIBLE OR DEFORMABLE ELEMENT CONTROLLED {2}
68.11  DF  .~ Destructible element {9}
69.~.~ With counterbalancing element

DEFINITION

Classification: 137/69

With counterbalancing element:

(under subclass 68.12) Apparatus which includes means for applying a force or bias to the frangible means in a direction opposing the force (usually fluid pressure) which tends to break the frangible element.