# US 8,539,870 B2 · Multifunctional saw apparatus and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,870 B2 - Document ID: US8539870B2 - Status: Granted - Kind: B2 - Application number: 13/646,973 - Filed: 2012-10-08 - Published: 2013-04-18 - Granted: 2013-09-24 - Earliest claimed: 2011-10-15 - Assignees: RBWL Licensing Holdings, LLC - Applicants: Robert Burton Behr - Inventors: Robert Burton Behr - Web page: https://patentgrep.com/patent/US8539870B2 ## CPC - B23D 47/08: of devices for bringing the circular saw blade to the workpiece or removing same therefrom - B23D 45/042: {with the saw blade carried by a pivoted lever (B23D45/028, B23D45/065 take precedence)} - B23D 47/132: {of means to position the saw blade at a specified angle when adjusting about an axis perpendicular to the work support surface} - B23D 59/007: {for mounting a portable sawing device on a frame part} - B27B 5/206: {the saw blade being carried by a pivoted lever (B27B5/208 takes precedence)} - B27B 9/00: Portable power-driven circular saws for manual operation (details or components, e.g. handles, casings, of portable power-driven tools not particularly related to the operation performed B25F5/00) - B27B 9/04: Guiding equipment, e.g. for cutting panels {(circular sawing machines for dividing plates in parts of determined size, e.g. panels B27B5/06)} - Y10T 29/49817: with other than ancillary treating or assembling - Y10T 83/7693: Tool moved relative to work-support during cutting - Y10T 83/7788: Tool carrier oscillated or rotated - Y10T 83/8763: Convertible from tool path to another or from implement to machine - Y10T 83/8773: Bevel or miter cut - B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q) - B27B: SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR (saws specially adapted for pruning or debranching A01G3/08; sawing apparatus specially adapted for felling trees A01G23/091; features not restricted to a particular type of wood saw B23D, e.g. attaching saw blades B23D51/00; machine tool frames, beds, pillars or like members, in general B23Q1/01) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract In some examples, an apparatus includes a base including an arm selectively movable with respect to the base. The arm is selectively rotatable about a first arm axis. A base plate is engaged with the arm. A tool is configured to be detachably coupled to the base plate. The tool is movable with the base plate when coupled to the base plate. The apparatus includes a first mode with the tool coupled to the base plate and the arm being selectively rotatable about the first arm axis, a second mode with the tool coupled to the base plate and the arm being constrained from rotating about the first arm axis, the arm being substantially stationary with respect to the base; and a third mode with the tool detached from the base plate. ## Claims ### Claim 1 An apparatus comprising: a base including an arm selectively movable with respect to the base, the arm being selectively rotatable about a first arm axis towards and away from a substantially planar top surface of the base; a base plate engaged with the arm; and a circular saw having a saw blade configured to be detachably coupled to the base plate, the circular saw being movable with the base plate when coupled to the base plate, wherein the apparatus includes: a first mode with the circular saw coupled to the base plate and the arm being selectively rotatable about the first arm axis; a second mode with the circular saw coupled to the base plate and the arm being constrained from rotating about the first arm axis, the arm being substantially stationary with respect to the base wherein the base plate is pivotable about a vertical axis such that a face of the saw blade is substantially ninety degrees with respect to the arm and vertically adjustable relative to the arm along the vertical axis; and a third mode with the circular saw detached from the base plate. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the base plate is pivotably engaged with the arm, the base plate being pivotable with respect to the arm between a first position and a second position. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the first mode includes the base plate in the first position and the second mode includes the base plate in the second position. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein the first position of the base plate is rotated substantially ninety degrees from the second position of the base plate. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the base plate includes a clamp configured to couple the circular saw to the base plate. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the first mode includes a miter saw mode. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the second mode includes a table saw mode. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the third mode includes a circular saw mode. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the base includes a recess configured to allow a portion of the saw blade to be recessed below a top surface of the base. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the base plate includes an engagement feature, the circular saw including a complementary engagement feature configured to interact with the engagement feature of the base plate to inhibit rotation of the circular saw with respect to the base plate. ### Claim 11 (depends on 1) The apparatus of claim 1, comprising a constant-on switch operable with the circular saw coupled to the base plate and inoperable with the circular saw detached from the base plate. ### Claim 12 (depends on 1) The apparatus of claim 1, comprising a blade guard lock configured to inhibit a blade guard of the circular saw from covering a blade of the circular saw with the circular saw coupled to the base plate. ### Claim 13 An apparatus comprising: a base including an arm selectively movable with respect to the base, the arm being selectively rotatable about a first arm axis towards and away from a substantially planar top surface of the base; a base plate pivotably engaged with the arm, the base plate being pivotable with respect to the arm between a first position and a second position; and a circular saw having a saw blade configured to be detachably coupled to the base plate, the circular saw being movable with the base plate when coupled to the base plate, wherein the apparatus includes: a miter saw mode with the circular saw coupled to the base plate in the first position and the arm being selectively rotatable about the first arm axis; a table saw mode with the circular saw coupled to the base plate in the second position and the arm being constrained from rotating about the first arm axis, the arm being substantially stationary with respect to the base wherein the base plate is pivotable about a vertical axis such that a face of the saw blade is substantially ninety degrees with respect to the arm and vertically adjustable relative to the arm along the vertical axis; and a circular saw mode with the circular saw detached from the base plate. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the base includes a recess configured to allow a portion of a blade of the circular saw to be recessed below a top surface of the base. ### Claim 15 (depends on 13) The apparatus of claim 13, comprising a constant-on switch operable with the circular saw coupled to the base plate and inoperable with the circular saw detached from the base plate.