Peter B Hopper

US Patent:

6520722, Feb 18, 2003

Filed:

Nov 9, 2001

Appl. No.:

09/987805

Inventors:

Peter B. Hopper - Lunenburg MA
David Gamache - Fitchburg MA

Assignee:

Simonds Industries, Inc. - Fitchburg MA

International Classification:

B23B 2700

US Classification:

407 42, 407 43, 407 51, 83846

Abstract:

Disclosed is a cutting tool with an asymmetric tooth form, and a method for making the same. Such tooth forms are useful for cutting tools such as band saw blades, circular saws, hacksaws and other saw type products. The tooth form of this invention can improve precision over prior art tooth forms by reducing manufacturing variability. The improved precision provides more consistent performance and a better quality of the cut surface. The non-symmetrical form ground tooth profiles cut designated chip profiles and thereby cut specific portions of the kerf much like a broaching application. This non-symmetrical ground tooth profile can alter the distribution of the downfeed cutting force allowing for more aggressive cutting or conversely, cutting at the desired rate with less downfeed pressure.

US Patent:

6598509, Jul 29, 2003

Filed:

Jun 29, 2001

Appl. No.:

09/896825

Inventors:

James Timothy Cook - Newton AL
Peter Blauvelt Hopper - Lunenburg MA

Assignee:

Simonds Industries, Inc. - Fitchburg MA

International Classification:

B27B 3314

US Classification:

83835, 125 1301, 83836

Abstract:

Disclosed are cutting blades for cutting tools and methods of making the blades. Such blades include tooth patterns with both set and non-set teeth. Each of the set teeth are set at an angle with respect to the jaw line of the blade, and each set tooth includes at least one surface feature that is effective to direct a portion of swarf that is produced via the cutting action of the blade into gullets of the blade such that less swarf overall is directed to the cutting surface of the objects being cut by the blade.

US Patent:

7913601, Mar 29, 2011

Filed:

Dec 5, 2006

Appl. No.:

11/633752

Inventors:

Dale G. Petts - Peterborough NH, US
Peter B. Hopper - Lunenburg MA, US

Assignee:

Simonds International Corporation - Fitchburg MA

International Classification:

B27B 33/06

US Classification:

83846, 83661, 83850

Abstract:

A saw blade, such as a bandsaw blade, has a toothform pattern that includes a raker tooth and set teeth. The bandsaw blade teeth are configured such that a distance from a tooth point of the raker tooth to a tooth point of an immediately preceding set tooth is the smallest tooth spacing in the saw blade toothform pattern. With the use of a smaller spacing, the raker tooth removes the smallest chip thickness from a work piece relative to the chip thicknesses removed by the set teeth. This reduces the amount of load imposed on the raker tooth point. In one arrangement, in order to balance the forces on either side of the blade during operation, the saw blade is configured such that an accumulated pitch of the tooth points set to a first side of the blade are substantially equal to the accumulated pitch of the tooth points set to a second opposing side of the blade.