U.S. patent application number 12/574866 was filed with the patent office on 2010-01-28 for miter assembly for miter saws.
Invention is credited to Adan Ayala, Frederick R. Bean, Daryl S. Meredith, Stephanie L. Vogel, Brian P. Wattenbach.
Application Number | 20100018373 12/574866 |
Document ID | / |
Family ID | 37387379 |
Filed Date | 2010-01-28 |
United States Patent
Application |
20100018373 |
Kind Code |
A1 |
Meredith; Daryl S. ; et
al. |
January 28, 2010 |
Miter Assembly for Miter Saws
Abstract
A miter saw having a base assembly, a rotatable table rotatably
disposed on the base assembly, and a saw assembly rotatably
supported by the table. The miter saw also has a miter lock
assembly for locking the rotational position of the saw of the
table relative to the base assembly.
Inventors: |
Meredith; Daryl S.; (York,
PA) ; Vogel; Stephanie L.; (York, PA) ; Bean;
Frederick R.; (Finksburg, MD) ; Wattenbach; Brian
P.; (Menomonee Falls, WI) ; Ayala; Adan;
(Baltimore, MD) |
Correspondence
Address: |
THE BLACK & DECKER CORPORATION
701 EAST JOPPA ROAD, TW199
TOWSON
MD
21286
US
|
Family ID: |
37387379 |
Appl. No.: |
12/574866 |
Filed: |
October 7, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11409903 |
Apr 24, 2006 |
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12574866 |
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60677174 |
May 3, 2005 |
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Current U.S.
Class: |
83/471.3 |
Current CPC
Class: |
B23D 45/046 20130101;
B23D 45/042 20130101; Y10T 83/7788 20150401; B23D 47/025 20130101;
Y10T 83/8773 20150401; Y10T 83/7697 20150401; B27B 5/29
20130101 |
Class at
Publication: |
83/471.3 |
International
Class: |
B23D 45/14 20060101
B23D045/14; B23D 47/02 20060101 B23D047/02 |
Claims
1-16. (canceled)
17. A miter saw comprising. a base assembly having an
upwardly-extending substantially annular wall; a rotatable table
rotatably disposed on the base assembly, the table having a
downwardly-extending substantially annular wall disposed adjacent
to the wall of the base assembly; a saw assembly rotatably
supported by the table; a bolt extending through the base assembly
and table, the bolt being surrounded by at least one of the wall of
the base assembly and the wall of the table; and an O-ring disposed
between the wall of the base assembly and the wall of the
table.
18. The miter saw of claim 17, further comprising a washer disposed
between the bolt and the table.
19. A miter saw comprising. a base assembly having an
upwardly-extending substantially annular wall; a rotatable table
rotatably disposed on the base assembly, the table having a
downwardly-extending substantially annular wall disposed adjacent
to the wall of the base assembly; a saw assembly rotatably
supported by the table; a bolt extending through the base assembly
and table, the bolt being surrounded by at least one of the wall of
the base assembly and the wall of the table; and an elastomeric
element disposed between the wall of the base assembly and the wall
of the table.
20. The miter saw of claim 19, wherein the elastomeric element is
an O-ring.
21. The miter saw of claim 19, further comprising a washer disposed
between the bolt and the table.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application derives priority from U.S. application Ser.
No. 60/677,174, filed May 3, 2005.
FIELD OF THE INVENTION
[0002] This invention relates generally to a miter assembly for a
miter saw.
BACKGROUND
[0003] Typical miter saws have a base assembly, a table that is
rotatable relative to the base assembly, and a saw assembly
including a motor and a blade driven by the motor. The saw assembly
may be pivotally attached to the table in order to allow for
inclined cuts relative to the top surface of the table.
[0004] It is an object invention to provide a miter assembly for
such miter saws.
SUMMARY
[0005] An improved miter saw is employed. The miter saw preferably
has a base assembly, a rotatable table rotatably disposed on the
base assembly, a saw assembly rotatably supported by the table, and
a miter lock assembly for locking the rotational position of the
saw of the table relative to the base assembly.
[0006] Additional features and benefits are described, and will be
apparent from, the accompanying drawings and the detailed
description below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] The accompanying drawings illustrate preferred embodiments
of the invention according to the practical application of the
principles thereof, and in which.
[0008] FIG. 1 is a side view of an exemplary miter saw according to
the invention;
[0009] FIG. 2 is a cross-sectional side view along line II-II of
FIG. 1;
[0010] FIG. 3 is a partial cross-sectional view along line III-III
of FIG. 1;
[0011] FIG. 4 is a partial cross-sectional view along line IV-IV of
FIG. 3; and
[0012] FIG. 5 illustrates a miter detent assembly, where FIGS.
5A-5B are a perspective view and a partial cross-sectional view
along line V-V of FIG. 4, respectively.
DETAILED DESCRIPTION
[0013] The invention is now described with reference to the
accompanying figures, wherein like numerals designate like parts.
Referring to FIG. 1, a miter saw 100 may include a base assembly
10, a table assembly 11 supported by base assembly 10, and a saw
assembly 20 supported by the table assembly 11. Saw assembly 20 may
include a support housing 21 rotatably connected to the table
assembly 11, at least one rail 22 slidably connected to the support
housing 21, a pivotable arm 23 pivotably attached to trunnion 21, a
motor 24 supported by the arm 23 and driving a blade 25. Arm 23 may
also support an upper blade guard 26, which preferably covers an
upper part of blade 25. A lower blade guard (not shown) may be
pivotally attached to upper blade guard 26 to cover a lower part of
blade 25.
[0014] Persons skilled in the art will recognize that miter saw 100
as shown is a slide miter saw. However, miter saw 100 may be a
non-sliding miter saw by changing the elements in saw assembly 20,
as is well known in the art.
[0015] Referring to FIG. 2, base assembly 10 may have wall(s) 10W
receiving wall(s) 11W of table assembly 11. Preferably, wall(s) 10W
is a single annular wall. Preferably, wall(s) 11W is a single
annular wall. A washer or bearing surface 12 may be disposed
between base and table assemblies 10, 11.
[0016] A bolt 15B may extend through base and table assemblies 10,
11 and threadingly engage a nut 15N, holding together base and
table assemblies 10, 11.
[0017] In order to minimize play between base and table assemblies
10, 11, it is preferable to provide at least one O-ring 13 between
walls 10W, 11W.
[0018] Table assembly 11 may carry a kerf plate 14 as is well known
in the art.
[0019] Referring to FIG. 3, a miter lock assembly 30 may be
provided to lock the pivotal position of table assembly 11 relative
to the base assembly 10. Miter lock assembly may include a handle
31. Handle 31 is preferably pivotally attached to ribs 11R of table
assembly 11. The handle 31 preferably has a cam 31C attached
thereto. When the handle 31 is pivoted downwardly, the cam 31C
preferably pushes a rod 32 towards the base assembly 10.
[0020] A clamp block 33 may be pivotably attached to the table
assembly 10. Rod 32 preferably contacts and pushes clamp block 33
towards the base assembly 10 when the handle 31 is rotated, thus
locking the table relative the base assembly 10.
[0021] A spring 34 may be disposed between clamp block 33 and a rib
11SR of table assembly 11. Accordingly, when handle 31 is pivoted
upwardly, pressure is taken off the rod 32 and thus the clamp block
33. Spring 34 preferably pushes the clamp block 33 away from the
base assembly 10, thus allowing the table assembly 11 to move
relative to the base assembly 10.
[0022] Referring to FIGS. 3-5, the base assembly 10 preferably has
a detent plate 10P attached thereto with notches 10PN. Detent plate
10P may be attached to base assembly 10 via a bolt 10PB extending
through detent plate 10P and threadingly engaged to base assembly
10.
[0023] A miter detent assembly 60 may be pivotably attached to
table assembly 11. Miter detent assembly 60 preferably includes a
body 61, with a detent portion 62 that engages a notch 10PN in
detent plate 10P.
[0024] Body 61 may have at least one axle 63. Bearings 64 (such as
ball or needle bearings) are preferably press fit on the axle(s) of
body 61. The bearings 64 are preferably trapped between posts 11P
of table assembly 11 and a clamp plate 65. Clamp plate 65 is
preferably made of spring steel and may have two angled flanges
65F. Clamp plate 65 may be attached to table assembly 11 via bolts
66 extending through clamp plate 65 and threadingly engaging table
assembly 11.
[0025] Persons skilled in the art will recognize that angled
flanges 65F will preferably force bearings 64 towards each other
and down into posts 11P when bolts 66 are rotated.
[0026] Preferably, miter saw 100 has a detent override assembly 40
to move detent portion 62 from a first position engaging notch 10PN
(where the table assembly 11 cannot be rotated relative to base
assembly 10) and a second position not engaging notch 10PN
(allowing table assembly 11 to rotate relative to base assembly
10). Persons skilled in the art are referred to the detent override
assembly described in U.S. Pat. No. 6,810,780, which is fully
incorporated herein by reference, as an example of detent override
assembly 40.
[0027] Detent override assembly 40 may include a body 41, which may
be pivotally attached to ribs 11RR of table assembly 11. Body 41
preferably has a button 41B extending beyond table assembly 11 for
the user to actuate detent override assembly 40.
[0028] Body 41 has a portion 41P that can contact body 61 to move
detent 62 between the first and second positions. With such
arrangement, when the user presses button 41B downwardly, portion
41P lifts body 61, thus moving detent 62 to the second
position.
[0029] A spring 67 is preferably disposed between table assembly 11
and body 61 to bias the detent 62 to the first position.
Accordingly, when the user releases button 41B, spring 67
preferably moves body 61 downwardly, thus moving detent to the
first position.
[0030] A spring 42 may be disposed between the table assembly 11
and the body 41 to bias portion 41P away from body 61. Such bias in
effects biases button 41B upwardly.
[0031] It may be preferable to provide a detent bypass assembly 50.
Referring to FIGS. 3-4, detent bypass assembly 50 may include a cam
51, which may be pivotally attached to ribs 11Q of table assembly
11. Cam 51 preferably has a handle 51H extending beyond table
assembly 11 for the user to rotate cam 51.
[0032] With such arrangement, the user can rotate handle 51H,
causing cam 51 to rotate. Such rotation causes body 41 to rotate
(thus moving detent 62 to the second position). Preferably cam 51
has a flat portion 51F that maintains body 41 in the rotated
position (and thus maintaining detent 62 in the second position),
allowing the user to rotate table assembly 11 without any
engagement between detent 62 and detent plate 10P.
[0033] Cam 51 is preferably disposed underneath body 41 between
ribs 11RR and portion 41P. However, persons skilled in the art will
recognize that cam 51 can be disposed above body 41 and between
ribs 11R and button 41B and still move and maintain detent 62 in
the second position.
[0034] Persons skilled in the art shall recognize that, when the
user rotates cam 51 to its original position, spring(s) 42 and/or
67 will cause detent 62 to move back to its first position and/or
body 41 to move back to its original position.
[0035] Persons skilled in the art will also recognize that cam 51
may be replaced by a screw 53 threadingly engaged to table assembly
11 for rotating body 41 and moving detent 62 to the second
position. Screw 53 is preferably disposed above body 41 and between
ribs 11R and button 41B. However, persons skilled in the art will
recognize that screw 53 can be disposed underneath body 41 between
ribs 11RR and portion 41P and still move and maintain detent 62 in
the second position.
[0036] Persons skilled in the art may recognize other additions or
alternatives to the means disclosed herein. However, all these
additions and/or alterations are considered to be equivalents of
the present invention.
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