US PATENT SUBCLASS 89 / 180
.~ Breech block lock (positive or impositive)

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

Internet Version by PATENTEC © 1999      Terms of Use


89 /   HD   ORDNANCE

125  DF  AUTOMATIC {14}
180.~ Breech block lock (positive or impositive) {8}
181  DF  .~.~> With latch
182  DF  .~.~> Inertia member released lock {1}
184  DF  .~.~> Nonrectilinear breech block motion (e.g., tilting rotary) {1}
186  DF  .~.~> Nonaxial, rectilinear, breech block motion
187.01  DF  .~.~> Sliding locking member {1}
188  DF  .~.~> Rotary locking member
189  DF  .~.~> Toggle locking member
190  DF  .~.~> Pivoted locking member

DEFINITION

Classification: 89/180

(under subclass 125) Guns in which the claimed inventions is limited to a breech block locking or retarding means.

(1) Note. The breech block may be either positively locked

in breech closed position against any substantial blow back motion, or merely initially retarded. To cause classification in this or indented subclasses the patents must claim some locking or retarding means other than the breech block recoil spring, a brake or the inertia of the parts.

(2) Note. Patents claiming breech block locking structure and also claiming or disclosing novel gas piston structure will be classified here and cross-referenced to the appropriate gas piston subclasses 191.01+.

(3) Note. The breech block locking member may be movably mounted on either the breech block or the stationary receiver or frame.

SEE OR SEARCH THIS CLASS, SUBCLASS:

17+, for breech block locks for nonautomatic ordnance. 159, and 160+, for breech block locks for movable barrel guns.

191.01+, see (2) Note.

194+, for inertia-locked or "blow back" guns.

198, for brakes for retarding substantially the entire motion of the breech block.

SEE OR SEARCH CLASS

42, Firearms, appropriate subclasses, for breech block locks for nonautomatic firearms.