.~ With latch operated by fluid pressure or dropped element
DEFINITION
Classification: 175/271
(under subclass 263) Apparatus in which the laterally movable
cutter element is held in one position, either expanded or collapsed, by a movable latch member, said latch member being moved by (1) a fluid under pressure acting against the latch or a part connected thereto or (2) engaging a part which is specifically described as being dropped from above ground to an operative position below ground.
(1) Note. Patents are classified in this subclass which specifically describe the latch as being operated by fluid pressure or a dropped element even though no such recitation is made in the claims provided the part on which fluid pressure directly acts on the dropped element itself is claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
99, and the subclasses there noted for other pressure fluid operated devices.
270, and the subclasses there noted, for other devices operated by a dropped element.
