Llewellyn Lee Johnston from 11108 26Th St, Vancouver, WA 98686, age 74, Phone: (360)5744590

Us Patents

Apparatus And Methods For Making A Masonry Block With A Roughened Surface
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US Patent:

7100886, Sep 5, 2006
Filed:

Mar 4, 2002
Appl. No.:

10/091039
Inventors:

James Hammer - Fircrest WA, US
Llewellyn Lee Johnston - Vancouver WA, US
Assignee:

Westblock Systems, Inc. - Salem OR
International Classification:

B28B 11/08
US Classification:

249104, 249162, 425385, 425470
Abstract:

Apparatus and methods are disclosed for making masonry blocks with one or more surfaces having a roughened texture resembling that of a split block or natural stone. In one embodiment, a mold comprises a plurality of walls defining at least one mold cavity adapted to receive block-forming material. The mold defines an opening through which a formed, uncured block may be removed from the mold. At least one wall of the mold has a plurality of projections extending into the mold cavity so as to contact an adjacent surface of the uncured block in the mold cavity. The projections are positioned such that when the uncured block is removed from the mold, the projections texture the adjacent surface of the uncured block.

Insert For Mold For Forming Concrete Blocks
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US Patent:

D595867, Jul 7, 2009
Filed:

Aug 2, 2007
Appl. No.:

29/289849
Inventors:

James E. Hammer - University Place WA, US
Llewellyn Lee Johnston - Vancouver WA, US
Assignee:

Westblock Systems, Inc. - Salem OR
International Classification:

2501
US Classification:

D25113

Wall Block, System And Mold For Making The Same
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US Patent:

7591447, Sep 22, 2009
Filed:

Aug 31, 2004
Appl. No.:

10/931485
Inventors:

James Hammer - Fircrest WA, US
Llewellyn Lee Johnston - Vancouver WA, US
Assignee:

Westblock Systems, Inc. - Salem OR
International Classification:

B28B 11/08
US Classification:

249104, 249162, 425385, 425470
Abstract:

A wall block comprises an upper surface spaced apart from a substantially parallel lower surface, opposed first and second faces, and opposed side surfaces converging between respective ends of the first and second faces. Blocks in a wall may be stacked on top of each other in either a vertical, set forward or set backward relationship. A three-block system for constructing walls includes a small, medium, and large block, each having two differently sized faces that can serve as the exposed face on one side of a wall. The small, medium, and large blocks can be manufactured using a single mold that is configured to provide a roughened texture resembling natural stone on two opposing faces of each block.

Large Pallet Machine For Forming Molded Products
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US Patent:

7635261, Dec 22, 2009
Filed:

Jan 27, 2006
Appl. No.:

11/341049
Inventors:

Douglas Vernon High - Vancouver WA, US
Stacy L. Gildersleeve - Woodland WA, US
Daniel Richard Wahlstrom - Vancouver WA, US
Llewellyn Lee Johnston - Vancouver WA, US
Keith Donald Brewer - Clackamas OR, US
Assignee:

Columbia Machine, Inc. - Vancouver WA
International Classification:

B28B 1/087
US Classification:

425255, 425421, 425424, 425432, 425456
Abstract:

A concrete products forming machine including a main frame, feed drawers, die supports and mold and head assemblies. The feed drawer is moved into position over the mold using an electric belt drive system and includes a vibrating strike off plate to improve surface quality of the molded product, zoned agitators to control movement and placement of concrete, a spring loaded seal system between the walls and floor of the feed box, and quick-release agitator design with urethane sleeves to effect easy and clean removal, replacement and cleaning of the agitators. The concrete products forming machine includes torque tube and leaf spring supports to effect substantially vertical vibrational movement of the mold with air inflatable springs for controlled force between the mold bottom and the pallet. The pallet itself is vibrated from below using phased, counter rotating shafts coupled to the pallet table on which the pallet rests. Vibration induced into the pallet by the vibrating pallet table is transferred to the mold resulting in material compaction.

Insert For Mold For Forming Concrete Blocks
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US Patent:

D610268, Feb 16, 2010
Filed:

Jun 3, 2009
Appl. No.:

29/338074
Inventors:

James E. Hammer - University Place WA, US
Llewellyn Lee Johnston - Vancouver WA, US
Assignee:

Westblock Systems, Inc. - Salem OR
International Classification:

2501
US Classification:

D25113

Portion Of A Mold Insert For Forming Concrete Blocks
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US Patent:

D622416, Aug 24, 2010
Filed:

Dec 24, 2009
Appl. No.:

29/352765
Inventors:

James E. Hammer - Univeristy Place WA, US
Llewellyn Lee Johnston - Vancouver WA, US
Assignee:

Westblock Systems, Inc. - Salem OR
International Classification:

2501
US Classification:

D25113

Concrete Mold Box Assembly With Polyurethane Bonded Compartments
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US Patent:

20070262229, Nov 15, 2007
Filed:

May 8, 2007
Appl. No.:

11/746022
Inventors:

Douglas High - Vancouver WA, US
Stacy Gildersleeve - Vancouver WA, US
Llewellyn Johnston - Vancouver WA, US
Assignee:

COLUMBIA MACHINE, INC. - Vancouver WA
International Classification:

B29C 33/56
B28B 7/24
B29C 33/40
US Classification:

249114100, 249119000, 264219000
Abstract:

A mold for concrete products includes a grid with a plurality of cavities that are open to both sides of the grid. The grid is bonded with polyurethane about its perimeter to the inner perimeter of a frame having a central opening therein. The grid may be formed of a single unitary piece or it may be formed from a plurality of sub-grids that are each bonded to the other with polyurethane.

Large Pallet Machine For Forming Molded Products
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US Patent:

20100086634, Apr 8, 2010
Filed:

Dec 9, 2009
Appl. No.:

12/634637
Inventors:

Douglas Vernon High - Vancouver WA, US
Stacy L. Gildersleeve - Woodland WA, US
Daniel Richard Wahlstrom - Vancouver WA, US
Llewellyn Lee Johnston - Vancouver WA, US
Keith Donald Brewer - Clackamas OR, US
Assignee:

COLUMBIA MACHINE, INC. - Vancouver WA
International Classification:

B29C 33/30
US Classification:

425453
Abstract:

A concrete products forming machine including a main frame, feed drawers, die supports and mold and head assemblies. The feed drawer is moved into position over the mold using an electric belt drive system and includes a vibrating strike off plate to improve surface quality of the molded product, zoned agitators to control movement and placement of concrete, a spring loaded seal system between the walls and floor of the feed box, and quick-release agitator design with urethane sleeves to effect easy and clean removal, replacement and cleaning of the agitators. The concrete products forming machine includes torque tube and leaf spring supports to effect substantially vertical vibrational movement of the mold with air inflatable springs for controlled force between the mold bottom and the pallet. The pallet itself is vibrated from below using phased, counter rotating shafts coupled to the pallet table on which the pallet rests. Vibration induced into the pallet by the vibrating pallet table is transferred to the mold resulting in material compaction. After the molding process, the mold is lifted in a stripping process to remove the molded product for curing or drying.