US PATENT SUBCLASS 411 / 367
.~.~ Having stay bolt spacer sleeve

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}
367.~.~ Having stay bolt spacer sleeve

DEFINITION

Classification: 411/367

Having stay bolt spacer sleeve type:

(under subclass 81) Subject matter wherein the fastening means is structured for and used in securing two or more plates or similar members in spaced relationship and further wherein the washer is in the form of a metallic cylindrical member which when in its assembled relationship substantially encloses the stay bolt while lying intermediate the plates or similar members.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

370, for a stay bolt with a bearing washer.

379+, for threaded stay bolt structure, per se.

505, for unthreaded stay bolt structure.

SEE OR SEARCH CLASS

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