US PATENT SUBCLASS 137 / 73
.~.~ With second sensing means


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}
72  DF  .~ Heat destructible or fusible {3}
73.~.~ With second sensing means


DEFINITION

Classification: 137/73

(under subclass 72) Apparatus which includes a means for controlling the fluid flow in response to a change in condition in addition to the control in response to the fusion or destruction of the heat destructible element.

(1) Note. See the class definition, section 3 for search notes on plural automatic controls in fluid handling devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75+, for safety cut-offs operated by fusible means but without responding to a second sensing means.