CA2411920A1 - A rapid set guard system for a radial arm saw - Google Patents
A rapid set guard system for a radial arm saw Download PDFInfo
- Publication number
- CA2411920A1 CA2411920A1 CA002411920A CA2411920A CA2411920A1 CA 2411920 A1 CA2411920 A1 CA 2411920A1 CA 002411920 A CA002411920 A CA 002411920A CA 2411920 A CA2411920 A CA 2411920A CA 2411920 A1 CA2411920 A1 CA 2411920A1
- Authority
- CA
- Canada
- Prior art keywords
- guard
- hand guard
- workpiece
- protective shield
- guard system
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/16—Saw benches
- B27B5/18—Saw benches with feedable circular saw blade, e.g. arranged on a carriage
- B27B5/20—Saw benches with feedable circular saw blade, e.g. arranged on a carriage the saw blade being adjustable according to depth or angle of cut; Radial saws, i.e. sawing machines with a pivoted radial arm for guiding the movable carriage
- B27B5/201—Radial sawing machines; Machines having a saw blade on an extendable radial arm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
- B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
A quick set guard system for a radial saw having an arcuately-shaped hand guard (32) attachable to outfeed end of the stationary upper protective shield (24) covering the saw blade (22). The hand guard (32) has a pawl arm (40) to which are mounted a pair of anti-kickback pawls (36, 38). The location of the anti-kickback pawls (36, 38) relative to the hand guard (32) is selected such when the hand guard (32) is positioned a selected distance from a workpiece, the location of the anti-kickback pawls (36, 38) are automatically set. The guard system also includes a riving knife (34) attachable to the hand guard (32). The hand guard (32) and riving knife (34) are independently adjustable relative to the upper surface of the workpiece.
Description
A RAPID SET GUARD SYSTEM FOR A RADIAL ARM SAW
TECHNICAL FIELD
The invention is related to radial arm saws and in particular to a guard system provided at the outfeed of the saw blade when the saw blade is in the rip saw position.
BACKGROUND ART
Typically, a radial arm saw consists of a circular saw mounted on a radial arm suspended above a work table. The radial arm is cantilevered from a column attached to the rear end of the work table. The radial arm saw may be operated in a cross-cut mode in which the circular saw is moved back and forth along the length of the radial arm and in a rip saw position in which the circular saw is rotated 90° from the cross-cut position. In the rip saw position, the circular saw is held stationary and the workpiece manually fed into the saw blade by an operator.
Because the saw may be operated in at least two different positions and modes of cutting, different problems can arise from improper use. In order to fully appreciate the problems involved in rip cutting, it is important to understand the nature of the rip-cutting operation. Rip cutting generally involves changing the width of an elongated workpiece. Normally, in a rip cutting operation, the cut is made parallel to the grain of the workpiece. The workpiece is fed into the motor driven saw blade parallel to a rip fence which is set at a desired distance from the saw blade. The rip fence serves as a guide for the workpiece as it is being cut.
The problems associated with the rip cutting operation include outfeed zone blade exposure, kickback and wrong way feeding. If the operator, contrary to the manufacturer's operating instructions, reaches behind the saw blade during rip cutting, and tries to guide, hold or pull the workpiece through the rotating saw blade, the rotating saw blade can accidentally pull the workpiece and the operator's hand back into the saw blade. As a result, the touching or pulling of the workpiece at the outfeed end of the saw while the blade is still spinning can result in operator injury.
Kickback occurs when the saw blade is pinched or bound in the workpiece. This can result in the workpiece being propelled or kicked back towards the operator and may even result in the entire workpiece being thrown towards the operator if the operator is standing directly in line with the direction of feed. Wrong way feed occurs when the operator attempts to feed the workpiece into the saw from the outfeed side of the saw blade, the rotation of the saw blade can rapidly pull the workpiece into the saw blade. As a result of this rapid pulling of the workpiece by the rotating saw blade, the operator can be pulled toward the rotating saw blade.
Currently, the manufacturers of radial arm saws have developed blade guards to reduce injury to the operators resulting from misuse of the saw.
Examples of such hand guards are taught by Metzger Jr. in U.S. Patents 5,287,779;
5,287,780 and 5,353,670. The present invention is a rapid set guard system which is operative to protect the operator from his own carelessness, kickback, and attempting to feed the workpiece into the saw blade the wrong way.
SUMMARY OF THE INVENTION
The invention is a rapid set guard system for a radial arm saw when used in a rip-cutting mode of operation. The guard system consists of a hand guard having an arcuate profile mating with the contour of the stationary upper protective shield covering the upper half of the motor driven saw blade. The hand guard has a "U" shaped cross-section which straddles the upper protective shield along its length and prevents access of the operator's hands from engaging the rotating saw blade below the upper protective shield. The hand guard is mounted to the protective shield by means of a locking knob received through a longitudinal slot which permits the hand guard to be moved up and down relative to the workpiece along the periphery of the upper protective shield. The hand guard further has a pawl arm to which is mounted a pair of kickback pawls. The kickback pawls are located by the pawl arm such that when the base of the hand guard is on or slightly above the upper surface of the workpiece to be cut, the position of the anti-kickback pawls is automatically and properly set. A riving knife may be attached to the hand guard by the same locking knob that locks the hand guard to the upper protective shield covering the top half of the saw blade. The locking knob is received through a slot provided in the riving knife and is independently adjustable relative to the workpiece.
One object of the invention is a guard system for a radial arm saw which is easy to set when the saw is configured for rip-cutting operation.
Another object of the invention is a guard system in which the anti-kickback pawls are automatically set with the setting of the guard system relative to the workpiece.
Still another object of the invention is a guard system that can be adapted to existing radial arm saws without modification.
Yet another object of the invention is the ability to set the riving knife independent of the anti-kickback pawls.
Still another object of the invention is that the anti-kickback pawls prevent the wrong way feeding of the workpiece into the saw blade.
Another object of the invention is a guard system placed at the outfeed end of the saw to having sufficient width to inhibit injury to the hand and fingers of the operator by the rotating saw blade improperly placed in the outfeed region.
These and other objects of the invention will become more apparent from a reading of the specification in conjunction with the appended drawings.
BRIEF DESCRIPTION OF DRAWINGS
FIGURE 1 is a perspective of a radial arm saw incorporating the quick set guard system.
FIGURE 2 is an exploded view of the guard system.
FIGURE 3 is a cross-section of the hand guard:
FIGURE 4 is a partial perspective showing the location of the hand guard and anti-kickback pawls when set relative to a workpiece.
BEST MODE FOR CARRYING. OUT THE INVENTION
Figure 1 shows the details of a radial arm saw which incorporates the quick set guard system according to the invention. The radial saw comprises of a table IO above which is suspended an electrically driven circulax saw assembly 12.
The saw assembly 12 is suspended from a radial arm 14 supported by a vertical column 16 generally located at the back of the table. The height of the saw assembly 12 above the table 10 is adjustable by means of a hand crank 18 in a conventional manner.
The saw assembly 12 is pivotably mounted to the radial axm 14 and can be rotated at least 90° from a cross-cut position to a rip-cut position. In the cross-cut position, the saw may be manually displaced along to the length of the radial arm 14. The saw assembly comprises an electric motor 20 which rotates a circular saw blade 22. The upper portion of the saw blade 22 is covered by a stationary upper protective shield 24 which protects the operator from flying saw dust and debris and prevents the operator from accidentally contacting the upper half of the spinning saw blade.
TECHNICAL FIELD
The invention is related to radial arm saws and in particular to a guard system provided at the outfeed of the saw blade when the saw blade is in the rip saw position.
BACKGROUND ART
Typically, a radial arm saw consists of a circular saw mounted on a radial arm suspended above a work table. The radial arm is cantilevered from a column attached to the rear end of the work table. The radial arm saw may be operated in a cross-cut mode in which the circular saw is moved back and forth along the length of the radial arm and in a rip saw position in which the circular saw is rotated 90° from the cross-cut position. In the rip saw position, the circular saw is held stationary and the workpiece manually fed into the saw blade by an operator.
Because the saw may be operated in at least two different positions and modes of cutting, different problems can arise from improper use. In order to fully appreciate the problems involved in rip cutting, it is important to understand the nature of the rip-cutting operation. Rip cutting generally involves changing the width of an elongated workpiece. Normally, in a rip cutting operation, the cut is made parallel to the grain of the workpiece. The workpiece is fed into the motor driven saw blade parallel to a rip fence which is set at a desired distance from the saw blade. The rip fence serves as a guide for the workpiece as it is being cut.
The problems associated with the rip cutting operation include outfeed zone blade exposure, kickback and wrong way feeding. If the operator, contrary to the manufacturer's operating instructions, reaches behind the saw blade during rip cutting, and tries to guide, hold or pull the workpiece through the rotating saw blade, the rotating saw blade can accidentally pull the workpiece and the operator's hand back into the saw blade. As a result, the touching or pulling of the workpiece at the outfeed end of the saw while the blade is still spinning can result in operator injury.
Kickback occurs when the saw blade is pinched or bound in the workpiece. This can result in the workpiece being propelled or kicked back towards the operator and may even result in the entire workpiece being thrown towards the operator if the operator is standing directly in line with the direction of feed. Wrong way feed occurs when the operator attempts to feed the workpiece into the saw from the outfeed side of the saw blade, the rotation of the saw blade can rapidly pull the workpiece into the saw blade. As a result of this rapid pulling of the workpiece by the rotating saw blade, the operator can be pulled toward the rotating saw blade.
Currently, the manufacturers of radial arm saws have developed blade guards to reduce injury to the operators resulting from misuse of the saw.
Examples of such hand guards are taught by Metzger Jr. in U.S. Patents 5,287,779;
5,287,780 and 5,353,670. The present invention is a rapid set guard system which is operative to protect the operator from his own carelessness, kickback, and attempting to feed the workpiece into the saw blade the wrong way.
SUMMARY OF THE INVENTION
The invention is a rapid set guard system for a radial arm saw when used in a rip-cutting mode of operation. The guard system consists of a hand guard having an arcuate profile mating with the contour of the stationary upper protective shield covering the upper half of the motor driven saw blade. The hand guard has a "U" shaped cross-section which straddles the upper protective shield along its length and prevents access of the operator's hands from engaging the rotating saw blade below the upper protective shield. The hand guard is mounted to the protective shield by means of a locking knob received through a longitudinal slot which permits the hand guard to be moved up and down relative to the workpiece along the periphery of the upper protective shield. The hand guard further has a pawl arm to which is mounted a pair of kickback pawls. The kickback pawls are located by the pawl arm such that when the base of the hand guard is on or slightly above the upper surface of the workpiece to be cut, the position of the anti-kickback pawls is automatically and properly set. A riving knife may be attached to the hand guard by the same locking knob that locks the hand guard to the upper protective shield covering the top half of the saw blade. The locking knob is received through a slot provided in the riving knife and is independently adjustable relative to the workpiece.
One object of the invention is a guard system for a radial arm saw which is easy to set when the saw is configured for rip-cutting operation.
Another object of the invention is a guard system in which the anti-kickback pawls are automatically set with the setting of the guard system relative to the workpiece.
Still another object of the invention is a guard system that can be adapted to existing radial arm saws without modification.
Yet another object of the invention is the ability to set the riving knife independent of the anti-kickback pawls.
Still another object of the invention is that the anti-kickback pawls prevent the wrong way feeding of the workpiece into the saw blade.
Another object of the invention is a guard system placed at the outfeed end of the saw to having sufficient width to inhibit injury to the hand and fingers of the operator by the rotating saw blade improperly placed in the outfeed region.
These and other objects of the invention will become more apparent from a reading of the specification in conjunction with the appended drawings.
BRIEF DESCRIPTION OF DRAWINGS
FIGURE 1 is a perspective of a radial arm saw incorporating the quick set guard system.
FIGURE 2 is an exploded view of the guard system.
FIGURE 3 is a cross-section of the hand guard:
FIGURE 4 is a partial perspective showing the location of the hand guard and anti-kickback pawls when set relative to a workpiece.
BEST MODE FOR CARRYING. OUT THE INVENTION
Figure 1 shows the details of a radial arm saw which incorporates the quick set guard system according to the invention. The radial saw comprises of a table IO above which is suspended an electrically driven circulax saw assembly 12.
The saw assembly 12 is suspended from a radial arm 14 supported by a vertical column 16 generally located at the back of the table. The height of the saw assembly 12 above the table 10 is adjustable by means of a hand crank 18 in a conventional manner.
The saw assembly 12 is pivotably mounted to the radial axm 14 and can be rotated at least 90° from a cross-cut position to a rip-cut position. In the cross-cut position, the saw may be manually displaced along to the length of the radial arm 14. The saw assembly comprises an electric motor 20 which rotates a circular saw blade 22. The upper portion of the saw blade 22 is covered by a stationary upper protective shield 24 which protects the operator from flying saw dust and debris and prevents the operator from accidentally contacting the upper half of the spinning saw blade.
The lower portion-of the saw blade 22 is covered, at least on one side, by a lower protective shield 26 pivotably attached to upper protective shield 24. The lower protective shield 26 is displaced by engagement with the workpiece to be cut as it is fed into the saw.
Referring additionally to Figure 2, a hand guard system 30 according to the invention is attached to upper protective shield 24 adjacent to the outfeed end by means of a locking knob 28 threadably received in a threaded bore. In many radial arm saws currently on the market, the locking knob 28 is already in existence and is used to lock a riving knife to the upper protective shield. The hand guard system 30 comprises a hand guard 32 and a riving knife 34 as is more clearly illustrated in Figure 2. A pair of anti-kickback pawls 36 and 38 are pivotably attached to a pawl arm 40 attached to or formed integrally with hand guard 32.
The hand guard 32 has an arcuate profile which matches the radial contour of the upper protective shield 24 and has an elongated slot 42 through which is received the locking knob 28. The riving knife 34 also has a mounting bracket 44 which has a corresponding elongated slot 46. The locking knob 28 also passes through the slot 46 and secures the riving knife 34 to the hand guard 32.
Referring now to Figures 2 and 3, there is shown the details of the hand guard 32 and riving knife 34. The hand guard 32 is an arcuate channel member 48 having a radius of curvature mating with the contour of the upper protective shield 24. Preferably, a lift tab 50 is provided at the upper end of the channel member 48 to facilitate the raising and lowering of the hand guard 32 relative to a workpiece. An upper end 52 of the pawl arm 40 is fixedly attached to the channel member 48 and the lower end has an extension 54 through which is provided a pawl mounting bore 56. Anti-kickback pawls 36 and 38 are pivotably attached to the pawl arm by means of a pivot pin or bolt 57 received in pawl mounting bore 56. The anti-kickback pawls 36 and 38 are mounted at the end of the pawl arm 40 at a location such that when the base 58 of the channel member 48 is slightly above the surface of the workpiece to be cut, the anti-kickback pawls 36 and 38 are properly positioned to engage the workpiece and prevent it from being kicked back into the saw blade.
Referring additionally to Figure 2, a hand guard system 30 according to the invention is attached to upper protective shield 24 adjacent to the outfeed end by means of a locking knob 28 threadably received in a threaded bore. In many radial arm saws currently on the market, the locking knob 28 is already in existence and is used to lock a riving knife to the upper protective shield. The hand guard system 30 comprises a hand guard 32 and a riving knife 34 as is more clearly illustrated in Figure 2. A pair of anti-kickback pawls 36 and 38 are pivotably attached to a pawl arm 40 attached to or formed integrally with hand guard 32.
The hand guard 32 has an arcuate profile which matches the radial contour of the upper protective shield 24 and has an elongated slot 42 through which is received the locking knob 28. The riving knife 34 also has a mounting bracket 44 which has a corresponding elongated slot 46. The locking knob 28 also passes through the slot 46 and secures the riving knife 34 to the hand guard 32.
Referring now to Figures 2 and 3, there is shown the details of the hand guard 32 and riving knife 34. The hand guard 32 is an arcuate channel member 48 having a radius of curvature mating with the contour of the upper protective shield 24. Preferably, a lift tab 50 is provided at the upper end of the channel member 48 to facilitate the raising and lowering of the hand guard 32 relative to a workpiece. An upper end 52 of the pawl arm 40 is fixedly attached to the channel member 48 and the lower end has an extension 54 through which is provided a pawl mounting bore 56. Anti-kickback pawls 36 and 38 are pivotably attached to the pawl arm by means of a pivot pin or bolt 57 received in pawl mounting bore 56. The anti-kickback pawls 36 and 38 are mounted at the end of the pawl arm 40 at a location such that when the base 58 of the channel member 48 is slightly above the surface of the workpiece to be cut, the anti-kickback pawls 36 and 38 are properly positioned to engage the workpiece and prevent it from being kicked back into the saw blade.
Figure 4 shows, in greater detail, the mounting of the guard system on the upper protective shield 24 of a radial arm saw. As shown on the cross-sectional view of Figure 3, the sides 60 and 62 of the channel member 48 straddle the sides of the upper protective shield 24 shown in the phantom.
The positioning of the guard system is very easy to accomplish. The operator has only to loosen knob 28 and lower the hand guard 32 until the base touches the surface of the workpiece. The operator then raises the hand guard 32 a small amount, approximately 1/8 inch (3.Omm) or less which permits the workpiece to slide freely under the base 58 of the hand guard 32. This positioning of the hand guard 32 relative to the workpiece automatically positions the anti-kickback pawls on the surface of the workpiece to allow the workpiece to move in one direction, the direction of feed, while prohibiting movement in the opposite direction. After the hand guard is positioned, the riving knife is positioned to fit into the saw kerf then the two are locked in place by tightening the lock knob 28. The riving knife helps to reduce pinching of the saw blade due to warpage of the wood during cutting.
As described above, the hand guard 32 helps to prevent the engagement of the operator's hand with the spinning saw blade. Further, the anti-kickback pawls are automatically set with the setting of the hand guard.
Finally, as shown in Figure 5, when the hand guard is set, the anti-kickback pawls prohibit the insertion of the workpiece into the saw in the wrong direction and to prevent kickback.
One of the advantages of the guard system is that it may be retrofit on to many existing radial arms saws with minimal or no modification, because many of the existing radial arm saws already have a lock knob 28 for holding a riving knife. Therefore, the quick set guard system may be incorporated in new radial arm saws or may be distributed as kits to update and improve the safety of existing radial arm saws.
While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.
The positioning of the guard system is very easy to accomplish. The operator has only to loosen knob 28 and lower the hand guard 32 until the base touches the surface of the workpiece. The operator then raises the hand guard 32 a small amount, approximately 1/8 inch (3.Omm) or less which permits the workpiece to slide freely under the base 58 of the hand guard 32. This positioning of the hand guard 32 relative to the workpiece automatically positions the anti-kickback pawls on the surface of the workpiece to allow the workpiece to move in one direction, the direction of feed, while prohibiting movement in the opposite direction. After the hand guard is positioned, the riving knife is positioned to fit into the saw kerf then the two are locked in place by tightening the lock knob 28. The riving knife helps to reduce pinching of the saw blade due to warpage of the wood during cutting.
As described above, the hand guard 32 helps to prevent the engagement of the operator's hand with the spinning saw blade. Further, the anti-kickback pawls are automatically set with the setting of the hand guard.
Finally, as shown in Figure 5, when the hand guard is set, the anti-kickback pawls prohibit the insertion of the workpiece into the saw in the wrong direction and to prevent kickback.
One of the advantages of the guard system is that it may be retrofit on to many existing radial arms saws with minimal or no modification, because many of the existing radial arm saws already have a lock knob 28 for holding a riving knife. Therefore, the quick set guard system may be incorporated in new radial arm saws or may be distributed as kits to update and improve the safety of existing radial arm saws.
While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.
Claims (12)
1. A quick set guard system for a radial arm saw having at least a stationary upper protective shield covering the top half of a motor-driven saw blade, the system comprising:
a hand guard having an upper end, a base end and an arcuate profile mating with the contour of the upper protective shield;
a pawl arm having one end attached to the upper end of the hand guard and a lower end adjacent to the base;
a pair of anti-kickback pawls attached to the lower end of the pawl arm, at a location selected to properly engage the surface of a workpiece when the base of the hand guard is spaced a selected distance from a top surface of a workpiece; and means for securing the hand guard to the upper protective shield adjacent the outfeed end of the saw blade.
a hand guard having an upper end, a base end and an arcuate profile mating with the contour of the upper protective shield;
a pawl arm having one end attached to the upper end of the hand guard and a lower end adjacent to the base;
a pair of anti-kickback pawls attached to the lower end of the pawl arm, at a location selected to properly engage the surface of a workpiece when the base of the hand guard is spaced a selected distance from a top surface of a workpiece; and means for securing the hand guard to the upper protective shield adjacent the outfeed end of the saw blade.
2. The guard system of claim 1 wherein the hand guard has a "U"
shaped cross-section having parallel side portions straddling the sides of the upper protective shield.
shaped cross-section having parallel side portions straddling the sides of the upper protective shield.
3. The guard system of claim 1 wherein said means for securing comprises a longitudinal slot provided in the hand guard and a locking knob received through the longitudinal slot to lock the hand guard to the stationary protective shield adjacent the outfeed end of the saw blade, the longitudinal slot permitting the hand guard to be slidingly displaced relative to the protective shield and to be locked to the upper protective shield with the base of the hand guard spaced the selected distance above the top surface of the workpiece independent of the thickness for the workpiece.
4. The guard system of claim 1 wherein the selected distance above the top surface of the workpiece is approximately 3 millimeters or less.
5. The guard system of claim 3 further including a riving knife attachable to the hand guard.
6. The guard system of claim 5 wherein the riving knife has a mounting bracket having an elongated slot through which the locking knob is received permitting the independent positioning of the riving knife relative to the workpiece.
7. A quick set guard system for a radial arm saw having at least a stationary upper protective shield covering the top half of a motor driven saw blade and a locking knob attachable to the protective shield, the guard system comprising:
a hand guard having an arcuate contour mating with the external profile of the protective shield, an upper end, a base, and a longitudinal slot through which the locking knob is receivable to lock the hand guard to the protective shield, a pawl arm having one end attached to the upper end of the hand guard and a lower end adjacent to the base; and a pair of anti-kickback pawls attached to the pawl arm, at a location selected to properly engage the surface of a workpiece when the base of the hand guard is spaced a selected distance from the top surface of a workpiece.
a hand guard having an arcuate contour mating with the external profile of the protective shield, an upper end, a base, and a longitudinal slot through which the locking knob is receivable to lock the hand guard to the protective shield, a pawl arm having one end attached to the upper end of the hand guard and a lower end adjacent to the base; and a pair of anti-kickback pawls attached to the pawl arm, at a location selected to properly engage the surface of a workpiece when the base of the hand guard is spaced a selected distance from the top surface of a workpiece.
8. The guard system of claim 7 wherein the hand guard has a "U"
shaped cross-section having parallel sides straddling the sides of the upper protective shield.
shaped cross-section having parallel sides straddling the sides of the upper protective shield.
9. The guard system of claim 7 wherein the selected distance of the base above the top of the workpiece is three millimeters or less.
10. The guard system of claim 7 further including a riving knife attachable to the hand guard by the locking knob.
11. The guard system of claim 10 wherein the riving knife has a mounting bracket having an elongated slot through which the locking knob is received to lock the riving knife to the hand guard.
12. The guard system of claim 7 wherein the pawl arm is integral with the hand guard.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US59928100A | 2000-06-22 | 2000-06-22 | |
| US09/599,281 | 2000-06-22 | ||
| PCT/US2001/041109 WO2001098043A1 (en) | 2000-06-22 | 2001-06-21 | A rapid set guard system for a radial arm saw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2411920A1 true CA2411920A1 (en) | 2001-12-27 |
Family
ID=24398987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002411920A Abandoned CA2411920A1 (en) | 2000-06-22 | 2001-06-21 | A rapid set guard system for a radial arm saw |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1239301C (en) |
| AU (1) | AU2001281284A1 (en) |
| CA (1) | CA2411920A1 (en) |
| WO (1) | WO2001098043A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040060178A1 (en) * | 2002-10-01 | 2004-04-01 | Mark Willer | Circular saw |
| GB2416329B (en) * | 2002-10-01 | 2007-06-20 | Milwaukee Electric Tool Corp | Saw |
| US8424434B2 (en) | 2009-04-28 | 2013-04-23 | Robert Bosch Gmbh | Universal fence for a power table saw |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2926709A (en) * | 1957-03-11 | 1960-03-01 | American Mach & Foundry | Guard for rotary power cutter |
| DE1814062A1 (en) * | 1967-12-12 | 1969-10-23 | Inst Cercetari Stiintifice | Protection device for circular saws |
| US4150598A (en) * | 1977-12-12 | 1979-04-24 | Rockwell International Corporation | Radial arm saw guard |
| US4532841A (en) * | 1982-03-10 | 1985-08-06 | Emerson Electric Co. | Saw blade guard |
| US4576073A (en) * | 1983-07-01 | 1986-03-18 | Stinson Robert J | Saw blade guard |
| US4892022A (en) * | 1988-09-20 | 1990-01-09 | Robert Bosch Power Tool Corporation | Safety guard for sawing power tool particularly mitre saw |
| US5287780A (en) * | 1993-03-15 | 1994-02-22 | Emerson Electric Co. | Radial arm saw guard with operational interlock |
| US5353670A (en) * | 1993-03-15 | 1994-10-11 | Emerson Electric Co. | Independently and jointly operable radial saw guards |
| US5287779A (en) * | 1993-03-15 | 1994-02-22 | Emerson Electric Co. | Radial saw safety guards and barriers |
| US5918521A (en) * | 1994-11-11 | 1999-07-06 | Sartori; James A. | Bifurcated holdown shoe for radial arm saws |
| US5918522A (en) * | 1996-06-28 | 1999-07-06 | Benedict Engineering Company, Inc. | Radial arm saw blade guard |
| DE19630022B4 (en) * | 1996-07-25 | 2007-12-20 | Fa. Andreas Stihl | Hand-guided implement with a protective cover |
| US5950514A (en) * | 1997-02-28 | 1999-09-14 | Benedict Engineering Company | Miter saw blade guards |
-
2001
- 2001-06-21 CA CA002411920A patent/CA2411920A1/en not_active Abandoned
- 2001-06-21 CN CN 01814561 patent/CN1239301C/en not_active Expired - Fee Related
- 2001-06-21 AU AU2001281284A patent/AU2001281284A1/en not_active Abandoned
- 2001-06-21 WO PCT/US2001/041109 patent/WO2001098043A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN1447737A (en) | 2003-10-08 |
| CN1239301C (en) | 2006-02-01 |
| WO2001098043A1 (en) | 2001-12-27 |
| AU2001281284A1 (en) | 2002-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |