Patents by Inventor David M. Graf
David M. Graf has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10471435Abstract: Shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. A mounting portion includes a mounting hole that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin for mounting in a reducing system. The circumferential edge includes a primary impact face to initially impact materials to be reduced and a wear edge to subsequently crush and shear the material against a wall of the equipment. The hammer is biased forward on the pin to admit more material to be crushed between the wear edge and the grates.Type: GrantFiled: November 28, 2017Date of Patent: November 12, 2019Assignee: ESCO GROUP LLCInventors: David M. Graf, Michael R. Weeks, John P. Hoice, Daniel R. Morrow, Terry L. Briscoe, Christopher M. Carpenter
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Patent number: 10022724Abstract: Impact shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. A mounting portion includes a mounting hole that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin for mounting in a reducing system. A distal portion includes a primary impact face to initially impact materials to be reduced and a wear edge to subsequently compress, crumble, and/or shear the material against a wall of the equipment. The hammer is provided with a plurality of alternating protrusions and recesses in the distal portion.Type: GrantFiled: November 14, 2014Date of Patent: July 17, 2018Assignee: ESCO CORPORATIONInventors: Michael R. Weeks, David M. Graf, Christoper M. Carpenter
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Publication number: 20180085758Abstract: Shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. A mounting portion includes a mounting hole that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin for mounting in a reducing system. The circumferential edge includes a primary impact face to initially impact materials to be reduced and a wear edge to subsequently crush and shear the material against a wall of the equipment. The hammer is biased forward on the pin to admit more material to be crushed between the wear edge and the grates.Type: ApplicationFiled: November 28, 2017Publication date: March 29, 2018Inventors: David M. Graf, Michael R. Weeks, John P. Hoice, Daniel R. Morrow, Terry L. Briscoe, Christopher M. Carpenter
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Patent number: 9855560Abstract: Shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. A mounting portion includes a mounting hole that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin for mounting in a reducing system. The circumferential edge includes a primary impact face to initially impact materials to be reduced and a wear edge to subsequently crush and shear the material against a wall of the equipment. The hammer is biased forward on the pin to admit more material to be crushed between the wear edge and the grates.Type: GrantFiled: May 17, 2013Date of Patent: January 2, 2018Assignee: ESCO CorporationInventors: David M. Graf, Michael R. Weeks, John P. Hoice, Daniel R. Morrow, Terry L. Briscoe, Christopher M. Carpenter
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Publication number: 20150129695Abstract: Impact shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. A mounting portion includes a mounting hole that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin for mounting in a reducing system. A distal portion includes a primary impact face to initially impact materials to be reduced and a wear edge to subsequently compress, crumble, and/or shear the material against a wall of the equipment. The hammer is provided with a plurality of alternating protrusions and recesses in the distal portion.Type: ApplicationFiled: November 14, 2014Publication date: May 14, 2015Inventors: Michael R. Weeks, David M. Graf, Christoper M. Carpenter
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Publication number: 20140151475Abstract: Shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. A mounting portion includes a mounting hole that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin for mounting in a reducing system. The circumferential edge includes a primary impact face to initially impact materials to be reduced and a wear edge to subsequently crush and shear the material against a wall of the equipment. The hammer is biased forward on the pin to admit more material to be crushed between the wear edge and the grates.Type: ApplicationFiled: May 17, 2013Publication date: June 5, 2014Inventors: David M. Graf, Michael R. Weeks, John P. Hoice, Daniel R. Morrow, Terry L. Briscoe, Christopher M. Carpenter
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Publication number: 20130233955Abstract: Shredder hammers having first and second major surfaces on opposing sides, and a circumferential edge. The hammer includes a mounting portion and a working portion. The mounting portion defines a mounting aperture that extends from the first major surface to the second major surface, and is configured to receive a hammer mounting pin. The working portion includes at least one recess in at least one of the first and second major surfaces with opposed walls that extend away from a distal portion of the circumferential edge. The hammers are used in shredding systems for shredding material.Type: ApplicationFiled: March 7, 2013Publication date: September 12, 2013Applicant: ESCO CorporationInventors: Daniel R. Morrow, Michael R. Weeks, David M. Graf, Christopher M. Carpenter
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Patent number: 8308094Abstract: Shredder hammers include a hammer pin opening in which at least some portion of the interior surface is curved in a direction moving from one major surface of the shredder hammer to the other. This interior surface may be smoothly formed as an arc of a circle, as a parabola, as a hyperbola, or as another curved surface, with the local extrema within the interior of the hole (e.g., at or near the center). Providing the curved interior surface helps vary and disperse the locations where force is absorbed due to contact between the hammer pin and the walls defining the hammer pin opening when the shredding hammer blade contacts the material to be shredded. Other structures include engagement between the hammer pin and the hammer as part of a bushing member, a spool or sleeve member, or a ball swivel member.Type: GrantFiled: February 26, 2010Date of Patent: November 13, 2012Assignee: ESCO Corp.Inventors: John P. Hoice, Lonny V. Morgan, Daniel R. Morrow, David M. Graf, Terry L. Briscoe
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Publication number: 20100213301Abstract: Shredder hammers include a hammer pin opening in which at least some portion of the interior surface is curved in a direction moving from one major surface of the shredder hammer to the other. This interior surface may be smoothly formed as an arc of a circle, as a parabola, as a hyperbola, or as another curved surface, with the local extrema within the interior of the hole (e.g., at or near the center). Providing the curved interior surface helps vary and disperse the locations where force is absorbed due to contact between the hammer pin and the walls defining the hammer pin opening when the shredding hammer blade contacts the material to be shredded. Other structures include engagement between the hammer pin and the hammer as part of a bushing member, a spool or sleeve member, or a ball swivel member.Type: ApplicationFiled: February 26, 2010Publication date: August 26, 2010Applicant: ESCO CORPORATIONInventors: John P. Hoice, Lonny V. Morgan, Daniel R. Morrow, David M. Graf, Terry L. Briscoe
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Patent number: 7367144Abstract: A wear assembly provided with a tapered opening and a complementary tapered lock wherein the lock can be pried into and from the opening to thereby eliminate the need for hammering. The lock is formed with a body and a latch that is movable between a hold position where the latch is engageable with a stop in the opening to releaseably retain the lock in the opening and a release position where the latch disengages the stop.Type: GrantFiled: January 4, 2006Date of Patent: May 6, 2008Assignee: ESCO CorporationInventors: Larren F. Jones, Christopher M. Carpenter, David M. Graf
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Patent number: 6993861Abstract: A wear assembly provided with a tapered opening and a complementary tapered lock wherein the lock can be pried into and from the opening to thereby eliminate the need for hammering. The lock is formed with a body and a latch that is movable between a hold position where the latch is engageable with a stop in the opening to releasably retain the lock in the opening and a release position where the latch disengages the stop.Type: GrantFiled: July 2, 2002Date of Patent: February 7, 2006Assignee: Esco CorporationInventors: Christopher M. Carpenter, David M. Graf
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Publication number: 20030024139Abstract: A wear assembly provided with a tapered opening and a complementary tapered lock wherein the lock can be pried into and from the opening to thereby eliminate the need for hammering. The lock is formed with a body and a latch that is movable between a hold position where the latch is engageable with a stop in the opening to releasably retain the lock in the opening and a release position where the latch disengages the stop.Type: ApplicationFiled: July 2, 2002Publication date: February 6, 2003Applicant: Esco CorporationInventors: Larren F. Jones, Christopher M. Carpenter, David M. Graf
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Patent number: D731564Type: GrantFiled: May 17, 2013Date of Patent: June 9, 2015Assignee: ESCO CorporatioInventors: David M. Graf, Michael R. Weeks, John P. Hoice, Daniel R. Morrow, Terry L. Briscoe, Christopher M. Carpenter
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Patent number: D731565Type: GrantFiled: November 14, 2013Date of Patent: June 9, 2015Assignee: ESCO CorporationInventors: Michael R. Weeks, David M. Graf, Christopher M. Carpenter
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Patent number: D792488Type: GrantFiled: May 5, 2015Date of Patent: July 18, 2017Assignee: ESCO CORPORATIONInventors: David M. Graf, Michael R. Weeks, John P. Hoice, Daniel R. Morrow, Terry L. Briscoe, Christopher M. Carpenter