US PATENT SUBCLASS 411 / 370
.~.~.~.~ Stay bolt bearing washer

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

337  DF  HEADED FASTENER ELEMENT WITH NUT, WASHER, SECURING MEANS OR CAP {12}
366.1  DD  .~ Headed bolt or screw with threads and complementary nut {4}
368  DF  .~.~ Having washer {1}
369  DF  .~.~.~ Including sealing means {1}
370.~.~.~.~ Stay bolt bearing washer

DEFINITION

Classification: 411/370

Stay bolt bearing washer:

(under subclass 369) Subject matter wherein the fastening means is structured for and used in securing two or more plates or similar members in a spaced relationship and further wherein the washer is structured for and used to mount the head of the fastener element within or to a plate or similar member.

(1) Note. The fastener assemblage of this subclass is typically used to secured boiler plates.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379+, for threaded stay bolt structure.

505, for an unthreaded stay bolt structure.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers, 496, for combination of stay bolts with boiler structures.