David N Chon

US Patent:

53819756, Jan 17, 1995

Filed:

Jun 11, 1993

Appl. No.:

8/074510

Inventors:

David N. Chon - Baltimore MD
Andrew V. Maynard - West Palm Beach FL

Assignee:

The Babcock & Wilcox Company - New Orleans LA

International Classification:

B02C 1328

US Classification:

241195

Abstract:

The pin holes for hammers used in shredders can be changed without the need for removing the hammer pins. A single elliptical hammer pin slot is provided in the hammer. A hammer pin is inserted into one end of the elliptical hammer pin slot and a removable plug is inserted into the slot at the hammer pin thereby securing the pin to the hammer. The pin hole can be changed upon normal wear and tear by removing the plug and sliding the hammer to move the pin to the opposite pin hole at the opposite curved section of the elliptical pin slot. The plug is reinserted at the opposite pin hole thereby securing the pin to the hammer.

US Patent:

48710733, Oct 3, 1989

Filed:

Oct 2, 1987

Appl. No.:

7/103963

Inventors:

John R. Berry - Cockeysville MD
David N. Chon - Baltimore MD

Assignee:

National Ecology, Inc. - Timonium MD

International Classification:

B07B 116

US Classification:

209672

Abstract:

A disc screen separator device for separating or classifying materials. The disc screen separator device includes a plurality of parallel, spaced apart corotating shafts each having a plurality of spaced apart separator discs mounted thereon for rotation therewith. The separator discs on adjacent shafts are interspaced. A plurality of spacers are located between adjacent separator discs on each shaft to maintain the spacing between adjacent separator discs on each shaft. Both the separator discs and spacer discs are fabricated of a resilient material. In an alternative embodiment, a disc screen separator device includes a plurality of sets of first shafts, the shafts of the sets of first shafts being parallel, spaced apart, and corotating with a plurality of spaced apart separator discs mounted on the first shafts for rotation therewith. A second shaft is located in the interval between sets of first shafts with a plurality of agitator discs mounted on the second shafts for rotation therewith. The agitator discs on the second shafts are interspaced with the separator discs on the first shafts of the shaft sets adjacent to the second shaft.

US Patent:

53819764, Jan 17, 1995

Filed:

Apr 5, 1994

Appl. No.:

8/223360

Inventors:

David N. Chon - Baltimore MD
Andrew V. Maynard - West Palm Beach FL

Assignee:

The Babcock & Wilcox Company - New Orleans LA

International Classification:

B02C 1328

US Classification:

241197

Abstract:

A hammer for use in shredders and comprising a hammer holder with a dovetail key and a hammer tip having a dovetail groove shaped to receive the dovetail key. The hammer tip is slidably engageable with the hammer holder by sliding the dovetail groove over the dovetail key. Centrifugal force from the hammer rotation keeps the tip secured to the holder. The hammer tip is also wider than the hammer holder in order to protect the holder from wear and tear.

US Patent:

53819721, Jan 17, 1995

Filed:

Aug 24, 1994

Appl. No.:

8/293333

Inventors:

David N. Chon - Baltimore MD
Andrew V. Maynard - West Palm Beach FL

Assignee:

The Babcock & Wilcox Company - New Orleans LA

International Classification:

B02C 13284

US Classification:

241 73

Abstract:

A downdraft shredder comprising a lower housing, a semicircular lower grate, a chute for supplying material to a rotor cavity and a hood for covering the remainder of the rotor cavity. A rotor with hammers is rotatably mounted in the rotor cavity and draws material from the chute against the lower grate for shredding the material. A plate extending in the hood from the rotor cavity to a back corner of the hood, allows air entrained by the rotor to stabilize thereby preventing an updraft of air through the chute. This produces a true downdraft shredder which represents a modification over known shredders.

US Patent:

54407958, Aug 15, 1995

Filed:

Dec 19, 1994

Appl. No.:

8/359133

Inventors:

David N. Chon - Baltimore MD
Andrew V. Maynard - West Palm Beach FL

Assignee:

The Babcock & Wilcox Company - New Orleans LA

International Classification:

B02C 1328

US Classification:

294011

Abstract:

The pin holes for hammers used in shredders can be changed without the need for removing the hammer pins. A single elliptical hammer pin slot is provided in the hammer. A hammer pin is inserted into one end of the elliptical hammer pin slot and a removable plug is inserted into the slot at the hammer pin thereby securing the pin to the hammer. The pin hole can be changed upon normal wear and tear by removing the plug and sliding the hammer to move the pin to the opposite pin hole at the opposite curved section of the elliptical pin slot. The plug is reinserted at the opposite pin hole thereby securing the pin to the hammer.