Abrading – Accessory – Guard or housing
Reexamination Certificate
2003-02-20
2004-09-28
Nguyen, George (Department: 3724)
Abrading
Accessory
Guard or housing
C451S455000, C451S449000, C451S453000, C125S012000, C220S004010
Reexamination Certificate
active
06796890
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to shields for power tools and, more specifically, to a splash shield housing for wet saws that contains and controls the overspray kicked out by the rotating saw blade. The housing forms a shell on three sides and extends across the top. The housing is formed of two opposing halves with one half having an extension member whereby the opposing sides can be spaced apart without compromising the integrity of the housing. The opposing side has channels for receiving the edges of the extension member allowing the hosing to be extended to a position to encompass most wet saws and moved to a point where the edges of the wet saw are positioned over the housing trough positioned along the interior of the housing. The shield further provides a splash guard comprised of an extendable retractable impermeable sheet having means for extending and attaching the sheet to the back table lip to prevent any overspray coming back between the table and rear wall trough.
2. Description of the Prior Art
There are other shield devices for use with power tools. Typical of these is U.S. Pat. No. 1,047,571 issued to L. E. Sadler on Dec. 17, 1912.
Another patent was issued to O. Walter on Sep. 22, 1931 as U.S. Pat. No. 1,824,000. Yet another U.S. Pat. No. 2,491,957 was issued to W. Dilley on Dec. 20, 1949 and still yet another was issued on Jan. 17, 1978 to P. M. Erdman as U.S. Pat. No. 4,068,648.
Another patent was issued to L. L. Gould on Jan. 3, 1984 as U.S. Pat. No. 4,423,568. Yet another U.S. Pat. No. 4,779,603 was issued to L. C. Crocetti on Oct. 25, 1988 and still yet another was issued to J. A Ruopsa on Mar. 14, 1989 as U.S. Pat. No. 4,811,527 and A. L. Smith was issued U.S. Pat. No. 4,976,251 on Dec. 11, 1990. U.S. Pat. No. 5,741,175 was issued on Apr. 21, 1998 to R. E. Voege who was also issued U.S. Pat. No. 5,577,955 on Nov. 16, 1996. On Apr. 27, 1999 Hubert Haller was issued U.S. Pat. No. 5,897,430 and Michael Kaeser was issued U.S. Pat. No. 6,257,222 on Jul. 10, 2001.
In a polishing hood, a base board having a triangular major portion and a front extension, a metal frame having side panels, a to panel, and a back panel secured to the base board. Glass plates in the side panels and the top panel, a back plate in the back panel, a section of felt covering and secured to the back plate, a metal clamp carried by the top panel at the front side thereof, and a downwardly inclined glass guard having one side secured in said clamp.
In a machine of the kind described, a water deflecting guard with a longitudinal slot in the bottom thereof for the upper portion of the rotary cutter and the bottom of the guard having a trough adjacent each side of the cutterslot and sloping rearwardly and the rear part of the bottom of the guard sloping downward and provided at it's rear end with an opening for receiving all the water from the guard below and discharging it into the water tank below.
An industrial safety shield comprising a resiliently flexible shield of plastic material and a plurality of separate permanently magnetic means secured thereto in spaced relation to each other, said magnetic means having pole faces of opposite polarity exposed for contact with the support and said magnetic means being operative when engaged with the support, to hold the shield in flexed condition against it's self-restoring force, whereby the whereby the shield flexed to the desired position and anchored magnetically at said other portion of the shield while the shield is flexed to said desired position.
A rotating brick saw has an enclosure which substantially surrounds a rotating saw, a sliding table which carries a brick into the saw and tracks on which the table slides. The enclosure has an opening at its distal end and a pit beneath the opening for collecting sawed particles. The sliding table has a wiper at its distal end to wipe sawed particles along a base of the enclosure into the opening and pit. A door closes an opening at the front of the enclosure, and the door has a flexible wiper at its base which wipes the table as it slides outward of the enclosure. A chute on the door guides sawed particles downward to the table and through an aperture in the table into a pit near a proximal end of the saw enclosure. The rear wall and front door of the enclosure are sloped inward to further aid in the deflection of sawed particles toward the particle-collecting pits.
A splash shield and cuttings guard for a glass router comprises a side shield and an eye shield formed of transparent plastic sheet material. The side shield consists of a C-shaped horizontal base plate with an upstanding wall about the outer margin and a depending flange about the inner margin, the flange fitting over the rim of a glass router housing about the back and sides of a work table above a liquid coolant reservoir. Liquid flung outwardly by the router grinding wheel is intercepted by the wall and returned via the base plate and the depending flange to the reservoir for reuse. The eye shield consists of an upstanding section in front of the housing, a diagonal section at the top thereof extending rearwardly over the router work table, and a rearwardly extending lower flange with openings engaging feet on the bottom of the router housing.
An improved shielding against splash of rearward-ejected slurry and dust provides a circular-saw brick-sawing container with a broad shield having a front edge overlapping the saw shroud, and in turn having a rear edge overlapped by a fixed horizontal shield connected with an upright fixed shield spaced from the saw container backsplash. A “Z”-shaped member resiliently connects the broad shield with the saw arm permitting a close, moving overlap at the aforementioned rear edge overlapped by the fixed horizontal shield. Laterally spaced vertical fixed-shields respectively adjacent an angled end of the broad shield splash container at the sides and a half-moon shaped array of spray nozzles wet down dust of dry sawing, controlled by a three-way valve that also controls a saw-wetting spray, both with recirculated, screened water from a catch pan base.
Improved abrading apparatus. The apparatus includes a rotating abrasive stone and, to minimize the quantity of abraded particles which escape from the apparatus into the surrounding environment, utilizes a closed circuit air flow and utilizes a protective air curtain between the rotating abrasive stone and a user.
A tile saw having a liquid reservoir and a rotary saw blade protruding through a saw table, the rotary blade picking up liquid from said liquid reservoir as it rotates, the liquid being used to cool the rotary blade as it cuts, comprising a means for maintaining the circulation of liquid from the liquid reservoir to the rotary blade as it cuts and back to the reservoir with no significant splashing or loss of liquid, and means for cutting past the rotary blade without interfering with the maintained circulation of liquid which cools the rotary blade. The rotary blade protrudes through a thin slit in the saw table so that a tile is provided with support as it is cut, whereby precision cuts can be made to the tile.
A plastic shield for a tile saw includes two vertical side panels, a back panel and a top panel, which in one embodiment are dismantlable separate panels. The components are quickly assembled together via slotted edges or connecting extrusions and when dismantled stack flatly within the water tray which is included as part of the tile saw apparatus. The tile saw shield is configured to allow normal use of the tile saw, without encumbering the user. It contains water from spraying out of the tray, to the extent that the tile saw can be used in an interior setting. In a second embodiment the shield is made of a single, integral piece of relatively rigid sheet material, such as “corrugated” plastic material, with fold lines enabling the shield to be erected by folding. Tabs and slots secure the shield together, without fasteners.
A plastic shield for a
Kroll Michael I.
Nguyen George
LandOfFree
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