WO1988001557A1

WO1988001557A1 - Rotary saw depth indicating arrangement

Info

Publication number: WO1988001557A1
Application number: PCT/US1986/001838
Authority: WO
Inventors: George S. Richmond
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-09-05
Filing date: 1986-09-05
Publication date: 1988-03-10
Anticipated expiration: 1989-03-05

Abstract

A cutting device including a generally circular blade arrangement, (2) with cutting means (3) located on the periphery thereof, a central aperture (5) located within the blade to receive arbor means to retain the blade on rotating power supply, and radially extending scale means (4) extending generally from the aperture means to the outer circumference of the bladed means with measurement means located thereon to indicate depth of entry of the blade into work in progress.

Description

DESCRIPTION

ROTARY SAW DEPTH INDICATING ARRANGEMENT TECHNICAL FIELD

The present invention relates to rotary saw blade arrangements and particularly to rotary saw blade arrangements wherein the rotary saw has inscribed

10 thereon a series of markings indicating depth of the blade from the outer circumference. The depth indicators are use to co-act with a platen arrangement provided in association with the blade and the power source for the blade.

Devices within the scope of the present invention

15 are particularly useful for hand held saws as well as- table saws and radial arm saws.

In many -instances where such devices are to be utilized it is particularly useful for the operator to be aware of the depth of the cut which will be made in

20 a particular setting of arrangement to avoid cutting to deep or requiring several cuts to achieve the proper

-**- depth of cut. Additionally, a platen is generally provided with most saw arrangments, except radial alarm saw arrangements where the blade extends through the

25 platen and in such instances devices within the scope of the present invention permit the operator to accurately operate the saw device, c No prior are arrangement is known which precisely teaches the devices within the scope of the present invention.

Typically, table saws are provided with drive spindle means to raise and lower the platen.

Indications of such raising and lowering are generally

10 based on the distance from the longitudinally axis of the drive spindle and in many instances bear no relationshi whatsoever to the accrual- depth of cut which is determined both by the distance from the drive spindle to the platen and the diameter of the saw τ_5 blade.

In general hand held rotary saws are provided with adjustable platen means but no means are presently known whereby the depth of cut can be directly and accturately ascertained simply by adjustment of the platen. First, such arrangements are not available and

20 second, no blade is known which provides radius markings on which permit co-action between the radius marking and the platen of the saw.

25 DISCLOSURE OF THE INVENTION

In accordance with the present invention a rotary saw depth determining arrangment is provided wherein 5 the depth of cut of a rotary blade can be easily and accurately ascertained and maintained during the course of a cut with the saw.

Devices within the scope of the present invention are equally useful with respect to hand held saws, table saws, and radial arms commonly known in the art.

10

More particularly, devices within the scope of the present invention incorporate a saw- blade wherein the distance from the outer circumference of the blade is marked on radial lines directed toward the center of the blade to readout the distance from the blade

15 circumference.

Inasmuch as devices within the scope of the present invention are intended to be useful with respect to both table saws, radial saws, as well as hand held saws the readings can be in one orientation on one side of the blade and an orientation on the 20 other side of the blade to permit the blade to be used in any such application.

/-

Additionally, devices within the scope of the present invention can be adapted to be accommodated by saw arrangements or can likewise be utilized in blade

25 other than saw blades such as router or dado blades. BRIEF DESCRIPTION OF THE DRAWINGS

Details of examples of the present invention will be described in connection with accompanying drawings wherein:

Figure 1 is a face view of a saw blade arrangement within the scope of the present invention;

Figure 2 is an illustration of a saw of the type shown in Figure 1 located within a hand held saw;

Figure 3 is an illustration of the type illustrated in Figure 1 located within a table saw; and

Figure 4 is an illustration of a saw arrangement within the scope of the present invention as shown in Figure 1 in a radial arm saw.

BEST MODE FOR CARRYING OUT THE INVENTION

Referring first to Figure 1, which is an illustration of a saw blade within the scope of the present invention, a blade body 2 is provided with circumferential cutting teeth 3. A central aperture 5 is provided to receive an arbor as is known in the art to retain the saw blade and to facilitate rotation of the blade as the arbor turns.

In accordance with the present invention scales, for example an inch scale 4 and metric scale 6 can be provided to extend radially outwardly from the aperture

2 to the outer edge of the cutting teeth 3.

It will be understood that while the present invention is described in terms of saw means, devices within the scope of the present invention are equally applicable for use with other type of rotating cutting device where cutting occurs at the peripheral edge of a rotating member, such as dado cutters, routers, and other such devices.

Devices within the scope of the present invention are particularly useful to facilitate accurate cutting to a specific depth without multiple attempts. For example, a platen can be provided, as described hereinafter, which can be set at the selected depth of cut as measured on the scale carried by the cutting member as shown in Figure 1 so that in a single cut a definate depth cut can be provided.

Figure 2 is an illustration of one example of an application of a cutting device of the type shown in Figure 1.

In Figure 2 a saw 11 is provided having a guard 15 to cover the upper rotating edge of the saw blade. The blade is received in a rotating arbor (not shown) through an aperture similar to aperture 2 of Figure 1 and a arbor nut 14 is provided to secure the blade to the arbor.

A movable platen 12 is provided, as is known in the art_r and can be adjusted as shown in dotted lines

12A to various positions to adjust the depth of cut of the blade.

As illustrated in Figure 2 by adjusting the position of platen 12A the depth of cut can be set and accurately measured by means of the scale 13 similar to scales 4 and 6 of Figure 1 provided to extend radially on the saw blade 10. Thus, by a simple single adjustment of the position of the platen 12 to the position 12A a specific an accurate depth of cut can be provided prior to ever initiating operation of the saw. Figure 3 is an illustration of a saw blade 23 ■ within the scope of the present invention located in a table saw 21. As is known in the art the saw blade 23 extends upwardly through a slit 22 in the table of the saw as shown. Scale 26 of the blade 23 can be seen and the table adjusted accordingly to provide a cut of preselected depth.

Finally, with respect to Figure 4 an arrangement is shown where a saw blade within the scope of the present invention is utilized in a radial arm saw. As is known in the act, a platen 38 is provided with a post 30 extending upwardly therefrom and an arm 31 extending parallel to the platen 38. A carriage 32 is provided to hold the saw assembly 34 and allow horizonal movement of the saw on the radial arm 31.

As is shown, a blade 36 of the type disclosed by the present invention is provided with a scale 37 where the height of the entire saw assembly 34 is adjusted to position the saw to make a selected depth cut in the work (not shown).

It will be understood from the foregoing that devices within the scope of the present invention can be used in numerous applications and for numerous purposes and that various other arrangements also within the scope of the present invention will occur to those skilled in the art upon reading the disclosure set forth hereinbefore.

Claims

CLAIMS OF THE INVENTION

The invention claimed is: CLAIM 1

A cutting device including a generally circular blade arrangement with cutting means located on the periphery thereof, a central aperture located within the blade to receive arbor means to retain the blade on rotating power supply, and radially extending scale means extending generally from the aperture means to the outer circumference of the bladed means with measurement means located thereon to indicate depth of entry of the blade into work in progress. CLAIM 2

The invention of Claim 1 including portable saw means having moveable platen means thereon and adapted to receive said saw blade arrangement whereby the position of the platen means relative to the arbor means of said saw assembly adjust the available depth of cut into work in progress provided by said saw blade. CALIM 3

The invention of Claim 1 including table saw means having rotating drive means with arbro means adapted to receive said blade means where said table saw means includes a vertically adjustable platen means with slit means to receive said blade means wherby the position of said table means can be ascertained relative to said scale means of said blade means to directly indicate depth of cut of said blade means in work in progress. CLAIM 4

The invention of Claim 1 including radial saw means having drive means connected to horizonally moveable saw power means having arbro means adapted to receive said blade means where said saw means is carried on said radial arm by carrier means and where said carrier means can be vertically adjusted to adjust the position of said saw above a platen means thereby in corporation with said scale means of said blade means determining the depth of cut of said saw blade in work in progress.