US 4,231,279 A · Adaptive washer and bolt assembly

Abstract

An adaptive washer assembly comprises a washer body which provides an inner flat surface which is abuttable against a base structure such as a timber bridge member to which a conventional bolt and the attached washer body will be attached in for example, timber construction. The washer body is provided with an outer curved surface, the outer surface and the inner face intersecting to form a periheral edge portion to said washer body. In the preferred embodiment, the washer body is thicker at the center portion thereof, and a substantially cylindrical bore is provided through the washer body at the thickened central portion thereof. The central bore can be provided with a diameter substantially equal to or larger than the diameter of the shaft portion of the bolt to be attached through the washer bore to the base structure which could be, for example, a wooden timber member. A bolt head recess provided on the washer body adjacent to the curved outer surface and communicating with the central bore is capable of protectively housing the bolt head portion of the conventional bolt with the uppermost surface portion of the bolt head being protected and substantially flush with the outer curved surface of the washer body. The adaptive washer provides a combined connection with conventional hex head bolts for situations where protruding heads are undesirable or dangerous.

Claims11

Dependent claims

An adaptive washer and bolt assembly comprising:

a. a bolt having a non-circular bolt head portion mounted on a cylindrical bolt shaft;
b. a rounded washer body providing an inner flattened face abuttable against a base structure to which said bolt and said washer body will be attached, said washer body having a rounded outer surface, said outer rounded surface and said inner flattened face intersecting at the outer edge of said rounded washer body to form a peripheral circular edge portion to said washer body;
c. A substantially cylindrical central bore providing an opening through said washer body, said bore having a diameter substantially equal to or larger than the diameter of said bolt shaft;
and
d. a non-circular bolt head recess being correspondingly sized to conform to the size of said bolt head, said bolt head registering with said recess, said recess being provided on said washer body adjacent said curved outer surface and communicating with said central bore, said bolt head recess receivably and protectively housing said bolt head, with the uppermost surface portion of said bolt head being substantially flush with said curved outer surface.

2 more elements

An adaptive washer and bolt assembly comprising:

a. a bolt having a non-circular bolt head portion mounted on a cylindrical bolt shaft;
b. a round washer body providing an inner face abuttable against a base structure to which said bolt and said washer body can be attached, said washer body having a curved outer surface, said outer surface and said inner face intersecting to form a round peripheral edge portion to said washer body, said peripheral edge portion of said washer body substantially contacting the surface of the base structure to which said bolt and said washer body are attached;
c. a substantially cylindrical central bore providing an opening through said washer body, said bore having a diameter substantially equal to or larger than the diameter of said bolt shaft, and said central bore is oriented perpendicularly to said inner face of said washer body;
d. a non-circular bolt head recess provided on said washer body adjacent said curved outer surface and communicating with said central bore, said bolt head recess receivably and protectively housing said bolt head with said bolt head and said recess being of compementary non-circular configurations
e. projection means connected to and protruding from said inner face portion of said washer body for retarding movement of said washer body in a direction parallel to and along the base structure to which said washer body and said bolt will be attached;
and
f. fastening means associated with said washer body and said bolt attached thereto for urging said washer body and the attached bolt into a face-face bearing connection with the base structure to which said washer body and said bolt are attached.

4 more elements

Dependencies are inferred from the claim text.

Adaptive washer and bolt assembly

Life of this patent

Adaptive washer and bolt assembly

Life of this patent

Abstract

Claims11