WO2016065367A1 - Porte-scie à longue durée de vie, amélioré - Google Patents

Porte-scie à longue durée de vie, amélioré Download PDF

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Publication number
WO2016065367A1
WO2016065367A1 PCT/US2015/057417 US2015057417W WO2016065367A1 WO 2016065367 A1 WO2016065367 A1 WO 2016065367A1 US 2015057417 W US2015057417 W US 2015057417W WO 2016065367 A1 WO2016065367 A1 WO 2016065367A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
blade holder
holder
sandpaper
teeth
Prior art date
Application number
PCT/US2015/057417
Other languages
English (en)
Inventor
James Edward PITTS
Original Assignee
Pitts James Edward
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pitts James Edward filed Critical Pitts James Edward
Publication of WO2016065367A1 publication Critical patent/WO2016065367A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D67/00—Filing or rasping machines or devices
    • B23D67/12—Hand-held or hand-operated filing or rasping devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D71/00—Filing or rasping tools; Securing arrangements therefor
    • B23D71/04—Hand files or hand rasps

Definitions

  • the present invention generally relates to a device for sanding, removing rough edges and leveling surfaces. More specifically, the invention is a handheld, reusable blade holder.
  • Sanding is defined as converting a surface from rough to smooth with products that range from rough to relatively smooth, starting with the roughest grade of sandpaper. Sanding also can be used to roughen very shiny surfaces to better hold paint.
  • Sandpaper has been around for hundreds of years. An early version featured bonded crushed shells, sand, etc., stuck to parchment with natural gum. Later, glass particles were used. Initially "dry" sandpaper was provided bonded with water-soluble glue and has been widely used because it is inexpensive. In the past century, a sandpaper with a waterproof backing was invented to be used with water to wash sanded-off particles from automobiles.
  • Sanding is important in a wide variety of industries, including automotive/vehicular, building (both new and remodeling), aeronautics, furniture (new and refinishing), as well as light industrial and heavy industrial industries. Because sanding creates very small particles, some industries are regulated to avoid inhalation by workers.
  • initial sanding can be performed with an electrically powered sander.
  • hand sanding is widely required.
  • a very smooth finish is required to decrease friction and drag of vehicles, including autos, trucks and airborne craft of all types.
  • a very smooth finish is also required for aesthetics in homes and furniture.
  • Hand sanding is still a labor-intensive task. For example, many hours and many sheets of sandpaper are required to prepare a car body surface for repainting.
  • the inventive sanding blade includes a blade with two ends and a top and a bottom surface, the bottom surface having teeth, the teeth being so spaced and dimensioned as to provide a variable sanding surface; and a hardened material to hold in place the top surface of the blade with the teeth protruding from the hardened material.
  • the blade is bent and the two ends are attached.
  • the blade ends can be attached with a bolt to form a circle.
  • the ends can be attached with hot metal solder and the blade assumes a tear drop shape.
  • the blade can be molded in the tear drop shape.
  • the sanding blade can have a flat surface on top.
  • the hardened material can be car body bond into which the top surface of the blade was placed when it was soft.
  • the blade holder's upper surface can be sized and rounded for handling by a professional sander.
  • the blade holder can have a perimeter that is round, square or oval.
  • the blade holder' s perimeter extends outward from the blade providing self-leveling.
  • the blade holder further has a skirt around the perimeter.
  • the blade holder skirt extends from the perimeter to be even with the teeth of the blade.
  • the blade holder has holes through the hardened material suitable for attachment to a vacuum hose. The blade holder holes are positioned inside and outside the blade.
  • FIG. 1 illustrates an embodiment of the bottom surface of the blade holder.
  • FIG. 2 is a close up of FIG. 1 , showing more detail of the blade teeth.
  • FIG. 3 shows a sanding blade with a dotted line for removal of hardened material permitting the blade holder access to corners.
  • FIG. 4 shows the bottom surface of the blade holder with exemplary holes to draw sanded particles up into the tool to be emptied into the vacuum hose.
  • FIGS. 5A and 5B show the blade holder with a removable handle.
  • FIG. 5A is a profile view of the removable handle.
  • FIG. 5B is a lateral view of the removable handle.
  • FIG. 6 shows a different design of the blade holder with a coarse blade positioned close to the edge of its holder.
  • FIG. 7 shows a different design of the blade holder with a fine blade positioned close to the edge of its holder.
  • the hacksaw blade had long, in-line teeth that are approximately parallel.
  • the handled blade was immediately useful for initial removal of newly applied car body filler. I grasped the handled blade so that the heel of my palm rested on the side opposite the hacksaw attachment; when I pressed hard on the heel of my palm and less on the opposite side, filler removal went quickly. Later and more intensive use has shown that the tool does not actually require downward pressure ("into" the filler), just lateral pressure to move along the surface and literally shave off excess filler.
  • I simply rotated the tool 20 to 50 degrees I continued to remove filler with the same tool, resulting in both angles of rotation removing filler with increasing fineness to obtain a smoother and smoother finish. Moreover, I found that applying less pressure permitted even finer sanding.
  • FIG. 2 shows details of the teeth arrangement that afforded the new function.
  • the blade teeth are quite sharp when new. With use, the blade teeth may wear down gradually; however, even the worn teeth are still effective in removing uneven product and producing a smoother surface. Excited as I was with this breakthrough, I knew my new blade holder needed more work before I could share it with professionals who spend many hours a day sanding. Alternately, the blade can have different configurations, with teeth sized, positioned and angled variably.
  • the blade surface can include but is not limited to a
  • TEFLON® finish carbide composition and dusting of the blade with diamonds and other hard materials.
  • FIG. 1 shows the under or working side of the oval-sided blade holder 10. Most of the exposed surface is a hardened material 20 that encases much of the blade 30. The two ends of the blade have been affixed in a corner 40. Opposite the corner 40 is the roughest part of the sanding blade 30 because there is more space between the teeth when the blade holder 10 is properly grasped. Tilting the blade holder to one side or the other to use the blade at an angle of 20-45 degrees utilizes the blade 30 so that the teeth are closer together for smoother finishing sanding.
  • the sanding blade 30 has been constructed from a hacksaw blade that has several advantages.
  • FIG. 2 shows details of the teeth of the hacksaw blade with rough and long teeth. Though the teeth are the same for the length of the hacksaw blade, using the rounded blade at an angle makes the teeth closer together to perform smoother and finer sanding. Applying force differently to the blade holder enables the professional removing product to efficiently use my blade holder in the hand and obtain both rough and finer finishes.
  • FIGS. 1 and 2 show the blade holder 10 with an oval outline.
  • the sides can be any shape, including but not limited to square, rectangular, and round.
  • FIG. 3 which shows the blade holder 10 from the inside looking down on the blade 30.
  • One portion of the edge of the blade holder 10 can have a tapered V 70 that is close to the sanding blade 30, as shown with dotted lines. In this view, the teeth 60 of the blade 30 are farther away.
  • This configuration enables the professional to sand in corners that could not be reached with the blade holder 10 as shown in FIG. 1.
  • My next breakthrough came when I created a handle for the blade holder to provide an easy-to-use, but specialized holder because people perform sanding for hours at a time!
  • my new blade holder is very effective at sanding gummy body filler that would ordinarily destroy sandpaper whose crevices quickly fill with soft body filler and interfere with sanding. Unlike sandpaper that merely removes car body filler, I have found that my blade holder also fills in voids that are untouched or even accentuated by sandpaper. With my new blade holder, I can wash it with soapy water or other solvents and shake it dry or blot it dry so it is ready for continued use.
  • I can cover the whole gamut of sanding products from coarse to very fine, etc.
  • I can offer one blade holder with the equivalent of 40-120 grits, another with the equivalent of 130-240 grits and another with the equivalent of 250-420 grits.
  • I can also provide color-coding, such as on the handles, so that they can be easily distinguished at a glance and at a distance. For example, I can provide orange handles for 40-120 grits, green handles for 130-240 grits and purple handles for 250- 420 grits
  • I provide the blade holder with the grit values imprinted and/or embedded in the bottom of the blade holder, which is particularly helpful for colorblind workers. This contrasts with sandpaper which is difficult to identify after the first piece is torn off and no more printed identification appears on the back. Trying to discern different but similar grits by feel is difficult when the professional works his way through sandpapers with close grit numbers; the professional often discards the unidentified piece and obtains a new labeled sheet, further adding to sandpaper waste.
  • FIG. 4 a partial view of a soft skirt 80 for the blade holder 10.
  • a skirt 80 limits abrasions to adjacent walls and serves other uses.
  • the skirt 80 affords a furry edge around the blade holder perimeter and can be fabricated of polystyrene, nylon, microfiber, sheep hide or other materials having similar properties.
  • resilient materials such as polystyrene.
  • a resilient surface of rubberlike or soft plastic can be applied to the edge of the blade holder 10.
  • I can affix a vacuum hose to the blade holder 10.
  • I can affix the hose to the edge of the blade holder 10 (at the location of the skirt 80) or provide at least one canal through the blade holder, so that a vacuum hose end (not shown) resides on the blade holder 10.
  • FIG. 4 shows the bottom of the blade holder 10 with an exemplary pattern of numerous holes 90 to draw fine particles into the blade holder and the vacuum hose. Note that the holes 90 appear both inside the blade circle and on the outsides, the better to catch particles regardless of the direction of movement of the blade holder 10. A sufficiently powerful vacuum pulls particles outside the skirt 80 into the skirt 80 and the holes 90.
  • the vacuum hose is preferably equipped with a means for maintaining hose contact with the professional sander's arm.
  • a means for maintaining hose contact with the professional sander's arm includes but is not limited to a clip to a shirt and an arm-encircling band attached with VELCRO®, a buckle, etc.
  • the vacuum blower unit is carried on the professional sander's back in a backpack.
  • a vacuum is battery powered.
  • Professional sanders also choose "wet" or “dry” sandpaper, depending on the job. Thus, a shop needs to maintain inventories of both sets of sandpaper; if the wet or dry sandpaper is missing, that impedes the workflow.
  • “Dry” sandpaper has the cheaper water- based adhesive to hold the sand or other particles.
  • “Wet” sandpaper has a waterproof adhesive to enable sanding of wet surfaces where sanding would clog the spaces among the sand particles spaces of dry sandpaper that either gums up or disintegrates upon exposure to water. In contrast, our new sanding blade can be used in wet or dry conditions.
  • rust in coconut or palm oil was a preferred sanding compound.
  • my blade holder can be used underwater to remove barnacles, clean swimming pools, prepare rusty bridges, clean wet plumbing at nuclear power plants, etc.
  • my invention utilizes a hacksaw blade, such a blade holder can even remove concrete slag slop that is found around concrete applications.
  • a typical, older, rusted car requires car body filler in numerous locations and sanding with about 45-80 sheets of sandpaper. All the car body filler must be first rough sanded, and then increasingly finer sanding paper is used as each area is sanded and re-sanded for a smoother finish before applying paint. For each restored area, the sandpaper is cut into usable pieces and applied to the manual holder. Sandpaper is removed and replaced numerous times. Each piece of sandpaper is then discarded.
  • the professional sander progresses from coarse (24, 30, 40, 50 grit) to medium (60, 80 grit) to fine (100, 120 grit) and very fine (150, 180, 220 grit), obtaining a new piece of sandpaper, cutting and fitting the sandpaper to the manual holder, sanding, removing and discarding the used paper, cutting, fitting, sanding, etc. all day long.
  • the barrel of used sandpaper is emptied, and the work area covered with sand is swept up.
  • my new blade holder we provide the equivalent of hundreds of pieces of sandpaper in three or more grits in one tool; in actual use in restoring cars, I estimate a savings of at least $450 worth of sandpaper.
  • FIGS. 5A and 5B show an example of an ergonomic blade holder 10 with a smaller handle 100 for grasping and more ergonomic use and a removable handle 110.
  • the removable handle 110 can be any convenient shape; however, having an arch 120 connecting the two sides 130 of the handle tends to make the handle 110 stronger.
  • Opposite sides of the blade holder 10 have at least one notch or depression 140 into which is inserted a short pin (not shown) on the inside of the handle side arm 130.
  • FIG. 5A shows the removable handle 110 in profile.
  • FIG. 5B shows the removable handle 110 from the side.
  • multiple notches 140 so that the removable handle 110 can be repositioned to take advantage of the different areas of the blade.
  • FIGS. 6 and 7 show new designs of the blade holder 210.
  • FIG. 6 shows a blade 220 with larger teeth that are equivalent to coarse sandpaper.
  • FIG. 7 shows a blade with smaller teeth that are equivalent of fine sandpaper.
  • the new designs position the blade 220 just inside the edge of the holder 230. 1 found I could simply hold the two ends of the blade 220 together with a clamp (not shown), fix the blade 220 into the soft car body filler that comprises the bulk of the blade holder 230. The car body filler dries in minutes and the clamp is removed. In spite of the blade 220 being close to the edge of the holder, the blade 220 was maintained in place permanently.
  • the car body filler which normally bonds very tightly to metal on a car body, also bonds tightly to the metal blade and does not require a large margin to keep the blade in place.
  • a block of metal is machined to the desired shape to accommodate a worker's hand on the outside and the blade assembly on the inside.
  • the blade assembly typically consists of a blade pinned in a circular or almost circular shape by welding, a screw or bolt, etc.
  • the block is machined to leave a plurality of posts arising from the block on the blade assembly side.
  • a metal insert is machined to fit the cavity on the metal block and mate with the protruding posts. Such as metal insert also secures the blade assembly in place.
  • This one-piece or two-piece assembly construction can be varied so long as the blade assembly is fixed in place and does not move independently from the metal block. Such movement would interfere with providing a smooth surface of the car or other base.
  • FIGS. 8A, 8B and 8C illustrate the different angles at which to use the blade holder.
  • FIG. 8A shows a prototype blade holder positioned to effect the fastest, most effective product removal. It removes materials quickly like a knife or razor. One simply pushes it up and down to level the surface by removing chips that are relatively big and coarse, comparable to 40 grit sandpaper.
  • the blade holder In contrast to sandpaper that abrades the surface and needs finer and finer grits for make smaller abrasions, the blade holder is better at smoothing the surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

La présente invention concerne un nouveau porte-scie comportant une lame avec deux extrémités et une surface supérieure et une surface inférieure, la surface inférieure comprenant des dents, les dents étant espacées et dimensionnées en vue de fournir une surface de ponçage variable. Un matériau durci maintient en place la surface supérieure de la lame avec les dents faisant saillie depuis le matériau durci.
PCT/US2015/057417 2014-10-24 2015-10-26 Porte-scie à longue durée de vie, amélioré WO2016065367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462068203P 2014-10-24 2014-10-24
US62/068,203 2014-10-24

Publications (1)

Publication Number Publication Date
WO2016065367A1 true WO2016065367A1 (fr) 2016-04-28

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436871A (en) * 1966-07-07 1969-04-08 Hyprez Electrometallics Corp Abrasive cutting tools
US3646712A (en) * 1970-08-24 1972-03-07 Pedro Quintana Dust-removing attachment device for power grinders
US3729873A (en) * 1970-01-20 1973-05-01 Eka Fabriks Ab Endless flexible abrasive belt having soldered seams and a method for making such seams
US5690545A (en) * 1995-02-16 1997-11-25 Porter-Cable Corporation Motorized rotary tool having a head mounted by a pivotal joint
US6261031B1 (en) * 1999-08-11 2001-07-17 Cooper Brands, Inc. Hand operated sanding tool
US6312325B1 (en) * 1995-12-08 2001-11-06 Norton Company Sanding disks
US7172501B2 (en) * 2004-03-12 2007-02-06 Rhodius Schliefwerkzeuge Gmbh & Co. Kg Flapped grinding disk
US20080096167A1 (en) * 2006-08-22 2008-04-24 Florman Michael J Grinder disk
US20090227188A1 (en) * 2008-03-07 2009-09-10 Ross Karl A Vacuum Sander Having a Porous Pad

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436871A (en) * 1966-07-07 1969-04-08 Hyprez Electrometallics Corp Abrasive cutting tools
US3729873A (en) * 1970-01-20 1973-05-01 Eka Fabriks Ab Endless flexible abrasive belt having soldered seams and a method for making such seams
US3646712A (en) * 1970-08-24 1972-03-07 Pedro Quintana Dust-removing attachment device for power grinders
US5690545A (en) * 1995-02-16 1997-11-25 Porter-Cable Corporation Motorized rotary tool having a head mounted by a pivotal joint
US6312325B1 (en) * 1995-12-08 2001-11-06 Norton Company Sanding disks
US6261031B1 (en) * 1999-08-11 2001-07-17 Cooper Brands, Inc. Hand operated sanding tool
US7172501B2 (en) * 2004-03-12 2007-02-06 Rhodius Schliefwerkzeuge Gmbh & Co. Kg Flapped grinding disk
US20080096167A1 (en) * 2006-08-22 2008-04-24 Florman Michael J Grinder disk
US20090227188A1 (en) * 2008-03-07 2009-09-10 Ross Karl A Vacuum Sander Having a Porous Pad

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