Bengt O Frieberg from 28061 Turlock Ct, Laguna Beach, CA 92677

Reversible Lock Washer
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US Patent:

43773613, Mar 22, 1983
Filed:

Aug 22, 1980
Appl. No.:

6/180411
Inventors:

Bengt O. Frieberg - La Habra Heights CA
International Classification:

F16B 3924
US Classification:

411161
Abstract:

A reversible lock washer having oppositely disposed cam surfaces adapted for use in combination with a threaded fastener of the type wherein a screw head or nut includes at least one cam surface arranged to engage at least one cam-engaging surface of the reversible lock washer, the cam surfaces of the washer being formed on the inner recessed ring of the washer body. The washer body includes an outer raised peripheral ring having a frictional surface formed on the opposite sides thereof, whereby the washer body is provided with a pair of identical cam and frictional surfaces, thus allowing the washer to be positioned randomly between the engageable cam surface of the nut or screw head and the respective workpiece which is engaged by the frictional surface of the outer peripheral ring, and wherein one arrangement of the nut includes two oppositely disposed reversible cam surfaces, whereby it too can be randomly positioned over the reversible lock washer.

Drive-Head Lock Washer
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US Patent:

47937521, Dec 27, 1988
Filed:

May 11, 1987
Appl. No.:

7/048235
Inventors:

Bengt O. Frieberg - Laguna Niguel CA
Assignee:

Perma-Tite AB
International Classification:

F16B 3924
US Classification:

411161
Abstract:

There is provided a flanged drive-head lock washer for use in combination with a wedge-action-type fastener, wherein the fastener includes a bolt or screw member having a cam nut or cam head. The flanged drive-head washer is formed having a nut-like body and a plurality of wrench-engaging sides to match the sides of the particular nut or head of a bolt. The upper face of the washer comprises a plurality of cam members arranged to lockingly engage the corresponding cam surface formed on the contacting surface of the cam nut or cam head. The lower surface of the washer is formed having a frictional surface defined by an enlarged annular flange. The matching cam surfaces are arranged to align the corresponding wrench-engaging side walls, whereby the cam nut or cam head can be simultaneously rotated during removal of the fastener without affecting the integrity of the fastener.

Locking Device For Threaded Fasteners
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US Patent:

41344383, Jan 16, 1979
Filed:

Jul 21, 1977
Appl. No.:

5/817791
Inventors:

Bengt O. Frieberg - La Habra Heights CA
Arthur B. Herpolsheimer - Sherman Oaks CA
International Classification:

F16B 3928
US Classification:

151 35
Abstract:

A locking device adapted for use with a bolt-and-nut type fastener, wherein the locking device comprises two annular washers (or one annular washer) and the under surface of a bolt head, the annular washers being formed with a cam face and a toothed face. The cam face thereof extends radially and outwardly from the central opening of the washer to a point less than the full width of the washer surface; and the toothed face thereof includes a plurality of radially extending teeth wherein each tooth thereof includes an outer enlarged portion for engagement with a work surface of the joint material, and an inner smaller portion adapted for engagement with the fastener, the cam surface being oppositely disposed over the inner smaller portion of the teeth, whereby the axial force applied by the fastener is transmitted from an inner radius to an outer radius of the adjoining washers, thus providing an action radius having an outwardly extended moment arm in order to apply greater force to the surface of the joint material.

Name / Title

Company / Classification

Phones & Addresses

Bengt Frieberg
President

SJOBERG SALES COMPANY, INC

23306 Caminito Marical, Moreno Valley, CA 92553
23306 Caminito Marcial, Laguna Beach, CA 92653

Bengt O. Frieberg
President

SWEDISH MACHINE TOOLS GROUP, INC

PO Box 2759, La Habra, CA 90631

Bengt O Frieberg