US PATENT SUBCLASS 411 / 147
.~.~ Member comprises washer formed as closed loop or apertured plate or as split ring

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

81  DF  THREADED FASTENER LOCKED TO A DISCREET STRUCTURE (E.G., PLATE, RAIL, WHEEL) {13}
132  DF  .~ Lock washer-type member located between substructure and bolt head or nut {8}
147.~.~ Member comprises washer formed as closed loop or apertured plate or as split ring {8}
148  DF  .~.~.~> Engaging side wall of counterbore in substructure
149  DF  .~.~.~> Plural, axially adjacent washers, or plural part washer {1}
151  DF  .~.~.~> Split ring having radially outwardly extending end
152  DF  .~.~.~> Ends of split ring overlap in stressed condition {1}
154  DF  .~.~.~> Apertured plate of uniform thickness having undulating contact surfaces
155  DF  .~.~.~> Apertured plate having arched sectional configuration (e.g., concavo convex) {1}
157  DF  .~.~.~> Split ring having opposed ends offset axially {2}
160  DF  .~.~.~> Closed loop having plural variations in the profile of a contact surface or a peripheral edge thereof {3}

DEFINITION

Classification: 411/147

Member comprises washer formed as closed loop or apertured plate or as split ring:

(under subclass 132) Device wherein the member consists of at least one element in the form of an open-center figure having a principal axis which generally coincides with the longitudinal axis of the bolt or the nut and wherein the figure may either (a) form a closed path as in (1) a ring or (2) a disclike element having an opening more or less in its center and having axially facing regions of significantly greater area than in the instance of (1); or (b) form other than a closed path by having free ends which (1) fall short of meeting one another or (2) pass one another and extend therebeyond.

(1) Note. In the absence of a locus elsewhere (i.e., in an area not involving a substructure relationship) for the member, per se, patents claiming only the member, as well as patents claiming the member in combination with the bolt, nut or substructure, are included in this and the indented subclasses.

(2) Note. A member having some degree of compressibility, but which compressibility is achieved in a manner not provided for elsewhere in this area (147+), will be found in this subclass (147).

(3) Note. Included herein is a collection of art wherein the outer periphery of the member is given some particular configuration (e.g., rectangular, square, etc.), which configuration ordinarily might not be deemed to be particularly relevant to the member's description as "an open-center figure forming a closed or a nonclosed path".

(4) Note. Also collected herein is a small amount of art disclosing a washer-to-bolt-thread relationship.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151, for the reference to this subclass (147) appearing in (1) Note thereof. 170, for a nut and an apertured spacer therefor which are formed adjacent to one another in a strip of material and are then placed in axial alignment with one another by folding the strip about an axis located between the nut and the spacer portions thereof; while the spacer remains attached to the nut and therefore does not qualify as an additional element for this subclass (147) and the indented subclasses, it sometimes functions in a manner related thereto.

531+, for washer structure when the washer is not a part of a rotation restricting arrangement for a bolt or nut.