Oppositely Directed Cutting Edges Patents (Class 30/502)
  • Patent number: 12059045
    Abstract: An article of clothing is provided in combination with a flexible saw and a deployment slot aligned with a seam within the article of clothing. The saw is storable in and retrievable from a cavity formed by the deployment slot. The article of clothing can be any military uniform or, preferably, an undergarment (i.e., undershirt; boxers/briefs, camisole or brassiere). The flexible saw has a elongated blade formed of a corrosive-resistant material and a grasping element formed at or attached to each end. The elongated blade may comprise a wire from about 20-gauge to about 26-gauge.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: August 13, 2024
    Inventor: Rodolph Hanna Fares
  • Patent number: 11400527
    Abstract: A milling device for machining a slot into an inner surface of a casing for a gas turbine engine. The milling device includes a frame assembly including multiple structural guides configured to engage structural features on the inner surface of the casing to maintain an axial position of the milling device relative to a longitudinal axis of the casing. The milling device also includes a milling cutter coupled to the frame assembly. The milling device is configured to be displaced in a circumferential direction relative to the longitudinal axis to machine the slot, via the milling cutter, along the inner surface of the casing in the circumferential direction.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: August 2, 2022
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Kurt Kramer Schleif, Fabian Gubelmann, Andrew David Ellis, Robert David Jones, Thomas Gloor, Roman Stefan Peter
  • Patent number: 10799260
    Abstract: An ultrasonic horn for use with an ultrasonic surgical handpiece including a resonator comprises a linear cutting blade at the distal end of a horn body. The linear cutting blade includes adjacent side-by-side rows of teeth each of which includes a land through which ultrasonic energy is propagated outwardly from the distal end. The lands of the rows of teeth are angled so that the propagated ultrasonic energy of one plurality of lands intersects the propagated ultrasonic energy from the other row of lands. Shear stress fields are developed at the intersections of the ultrasonic energy that will perform the cutting function on target tissue. An irrigation arrangement is also disclosed.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: October 13, 2020
    Assignee: Integra LifeSciences (Ireland) Ltd.
    Inventors: Daniel J. Cotter, Prakash Manandhar
  • Patent number: 10307917
    Abstract: An improved blade for use with an oscillating power tool is disclosed. A rectangular style blade includes side teeth to eject debris and allow rapid but well controlled blind plunge cuts. The side teeth are preferably asymmetric with a forward orientation to bias debris out and the blade inward. Preferably one or more openings or slots allow for additional debris removal. The side teeth also allow for controlled side cutting.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: June 4, 2019
    Assignee: WorkTools, Inc.
    Inventor: Joel S. Marks
  • Patent number: 8250958
    Abstract: An electric saw device includes a first saw blade and a second saw blade. The first and the second saw blades are respectively driven by a small transmission shaft and a large transmission shaft to rotate in opposite directions. A round rib is disposed on an inner end surface of the first saw blade, and at least three recessed holes are arranged in a top end surface of the round rib at equal angle intervals. A steel ball is accommodated in each of the recessed holes, and protrudes out of the recessed hole. Protruding ends of the steel balls urge against an inner surface of the second saw blade, so as to limit a distance between the first saw blade and the second saw blade, and form a rolling friction when the first and the second saw blade rotate in the opposite directions.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: August 28, 2012
    Assignee: Newstar (Asia) Ltd
    Inventor: Chung-Chi Eric Chen
  • Publication number: 20090205210
    Abstract: A two sided pruning saw blade includes a main blade body, a concave underside cutting edge, a convex over-side cutting edge, and optionally a claw-shaped hook. The convex cutting edge is formed along a top edge of the main blade body for under-cutting a branch to form an underside kerf therein. The hook is positioned adjacent to the underside kerf to align the main blade body on a top side of the branch with the underside kerf. The concave cutting edge is formed along a bottom edge of the main blade body for over-cutting the branch to form an over-side kerf and to subsequently connect the over-side kerf with the underside kerf to sever the branch. The claw-shaped hook is disposed distally relative to the underside cutting edge to prevent the main blade body from passing wholly through the over-side kerf during cutting thereof.
    Type: Application
    Filed: August 6, 2008
    Publication date: August 20, 2009
    Inventors: Richard A. Artmeier, James T. McGrane
  • Patent number: 7200940
    Abstract: A tool for burring the surface of a material. The tool has two sets of oppositely facing toothed blades which are made to move towards each other when the tool is pressed against a surface. Each tooth planes a shallow groove into the surface which results in hook-like burrs or planings rising from each groove. Limiters on the blade stroke ensure that the raised burr is not severed. A spring returns the blades to their start position. The resulting surface therefore has a plurality of shallow, non-piercing stopped grooves with a like plurality of hook-like burrs. Such a modified surface provides increased surface area for electrochemical activity, and a mechanical grip to materials bonded thereto. The tool uses replaceable blade packs which snap into a permanent tool housing. The tool may be operated with a simple hammer blow or it may be rapidly driven into large or small areas of a surface by a manual and/or computer directed punch press.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: April 10, 2007
    Inventor: Winston MacKelvie
  • Patent number: 7127820
    Abstract: The invention described herein relates to a flush cut saw that is capable of safely making a flush cut. The saw has a handle with a thin, flexible blade extending therefrom. The blade has two elongated extensions running away from the handle. The extensions can each have external and internal edges, and are mounted in a spaced, opposed relation. The internal edges can be provided with teeth preferably oriented to allow for a pull cut. The external edges are dull, and may be curved to prevent injury.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: October 31, 2006
    Assignee: Miller Dowel Company
    Inventor: Michael Miller
  • Patent number: 6886261
    Abstract: This invention consists of three new features which on their own or in combination, improve the usefulness of the existing drywall jab saw. The three new features are the addition of fine teeth to the top of the blade, a blade with equally spaced holes along its length which are used as a rip guide, and a notch at the end of the handle to help remove narrow rips of drywall.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: May 3, 2005
    Inventor: Dale Steven Haut
  • Publication number: 20010010124
    Abstract: An implement is provided and has a drive motor secured to one end of a carrying tube and connected via a drive shaft in the tube with the other end of the tube. A first handle is disposed on the tube in the vicinity of the drive motor and is spaced from a second handle. To support the forearm of an operator, a supporting device is provided that extends in the longitudinal direction of the carrying tube in the direction toward the drive motor. The longitudinal axis of the supporting device forms an angle of less than 90° with the carrying tube and is open toward the drive motor.
    Type: Application
    Filed: January 29, 2001
    Publication date: August 2, 2001
    Applicant: Firma Andreas Stihl AG & Co.
    Inventor: Andreas Schneider
  • Patent number: 5946990
    Abstract: A drain assembly removal tool and method are disclosed for removing a drain assembly, including providing a hand grip, two prongs extending from the hand grip, and cutting means attached to at least one prong for cutting into a strainer plug body of a drain assembly. In one aspect, an adjustable saw blade includes a multi-position slot for mounting the saw blade to the prong for providing adjustment to contact the saw blade to the strainer plug body of the bathtub drain. In one aspect, a serrated helical wheel provides adjustment to contact the saw blade to the strainer plug body of the bathtub drain. In another aspect, an adjustable cutter wheel includes a serrated helical wheel for providing adjustment to contact the cutter wheel to the strainer plug body of the bathtub drain.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: September 7, 1999
    Inventor: Anthony S. Bonacci
  • Patent number: 5901451
    Abstract: A two sided pruning saw blade has a top cutting edge used for making an undercut of a limb while the bottom cutting edge is used for regular pruning. Both the top cutting edge and the bottom cutting edge have a compound curve containing two radii of curvatures which are different from one another.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: May 11, 1999
    Assignee: Takagi Tools, Inc.
    Inventor: Toshiro Nakayama
  • Patent number: 5687484
    Abstract: A child safe cutter for use by children in carving pulpy round fruits such as pumpkins. The cutter is capable of clearing particulate from a cut being formed in the fruit to prevent jamming and sticking of said cutter caused by the compression of the pulp about the blade. The cutter includes a handle for gripping and an elongated blade mounted thereon. The blade extends away from the handle to define a tip and has at least one edge, and two opposing sides defining a thickness. The blade has a trough of gradually increasing width and depth formed along at least one of its two opposing sides to facilitate the removal of pulp and particulate matter so the blade may move freely in the fruit when cutting. The tip has a hook formed thereon extending from an edge of the blade and curving toward the blade's centerline. A plurality of cutting teeth are positioned transversely along at least a portion of the one or more edges of the blade in an area between the handle and the tip.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: November 18, 1997
    Inventor: Michael Hahn
  • Patent number: 5408901
    Abstract: A packing extractor tool (10 ) for removing packing (27) from a valve assembly (20), is described. The extractor tool is comprised of an arcuate sidewall (11) having an opening (17) that enables the extractor tool to be mounted around a valve stem (25) without removing the handle wheel (37) from the valve stem. One end of the sidewall of the extractor tool is provided with sawblade teeth (13). The other end of the sidewall has a handle (15) that enables the extractor tool to be rotated around the valve stem to that the sawblade teeth can cut into and disintegrate the packing. A distal portion (15B) of the handle can be angled upward which helps a user apply a downward force to the extractor tool so that the sawblade teeth can penetrate into and disintegrate the packing.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: April 25, 1995
    Inventor: Aaron L. Bishop
  • Patent number: 5031324
    Abstract: A power saw has two oppositely reciprocating saw blades guided and supported in a receiving slot in a support plate. The blades are supported during sawing along shoulders on their outside by lower edges of support sections of the support plate. The arrangement is such that forces generated in operation during cutting press the saw blades together in the area of their teeth. This prevents saw dust, chippings etc. penetrating between the two saw blades. Preferably, the thickness of the saw blade shoulders are not greater than half the thickness of the saw blades, and preferably no greater than the thickness of the support section edges. The teeth of the saw blades may be so ground and arranged that the resultant force on the teeth during cutting also forces the saw blades together at their teeth.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: July 16, 1991
    Assignee: Black & Decker Inc.
    Inventors: Ulrich Berghauser, Horst Grossmann, Karl Schmid, Ernst Staas
  • Patent number: 4627165
    Abstract: A hand saw having cutting teeth with a depth limiting design compatable with the forces capable of being generated by an operator. The leading cutting edge is followed by a rearwardly sloping bottom surface that allows the operator to control the bite of the teeth and thereby produce a smoother cutting action.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: December 9, 1986
    Assignee: Omark Industries, Inc.
    Inventor: Duane M. Gibson