Conveyor belt scraper blade

1. A scraper blade for a conveyor comprising:

a blade body having first and second opposing ends and having a forward side and a rearward side between the first and second ends, wherein the second end of said blade body provides a scraping edge and wherein the first end of said blade body provides a base for mounting the scraper blade on a blade mount of a conveyor, and

said blade body having a plurality of elongated recessed features extending across the rearward side thereof, wherein the elongated recessed features are spaced apart and are generally parallel to the scraping edge of the first end of the scraper blade,

at least one raised feature extending across the rearward side of said blade body, wherein the at least one raised feature is generally parallel to the scraping edge of the first end of the scraper blade and is further from the second end than are the elongated recessed features,

whereby a feathered edge produced by wear at the scraping edge tends to separate from the blade body when the scraper blade wears to one of the recessed features, thereby to leave a renewed scraping edge on the scraper blade, and whereby the at least one raised feature provides an indication of wear of the scraper blade.

2. The scraper blade of claim 1 wherein the plurality of recessed features includes spaced slots or grooves on the rearward side of the scraper blade.

3. The scraper blade of claim 1 wherein the plurality of recessed features includes spaced semicircular slots or grooves on the rearward side of the scraper blade.

4. The scraper blade of claim 1 wherein said at least one raised feature includes a semi-circular protrusion on a trailing edge of said blade body specifically following the last of the elongated recessed features thereof in distance from the second end of said blade body, whereby the scraper blade may be replaced when worn to the semi-circular protrusion.

5. The scraper blade of claim 1 wherein said blade body includes polyurethane, ultra high molecular weight polyethylene, rubber, a plastic material, or a combination thereof.

6. The scraper blade of claim 1 further comprising a scraper blade mount to which the base at the first end of said blade body is affixed, said scraper blade mount having a groove for receiving a scraper blade support bar therein.

7. The scraper blade of claim 6 wherein the groove of said scraper blade mount has beveled edges at the entrance to the groove to provide clearance for a fillet weld of the scraper blade support bar to which said scraper blade is mountable.

8. A scraper blade for a conveyor comprising:

a blade body having first and second opposing ends and having a forward side and a rearward side between the first and second ends, wherein the second end of said blade body provides a scraping edge, and wherein the first end of said blade body provides a base for mounting the scraper blade on a blade mount of a conveyor, and

said blade body having a plurality of elongated recessed features extending across the rearward side thereof, wherein the elongated recessed features are spaced apart and are generally parallel to the scraping edge of the first end of the scraper blade,

a scraper blade mount to which the base at the first end of said blade body is affixed, said scraper blade mount having a groove for receiving a scraper blade support bar therein,

wherein the groove of said scraper blade mount has beveled edges at the entrance to the groove to provide clearance for a fillet weld of the scraper blade support bar to which said scraper blade is mountable.

9. The scraper blade of claim 8 wherein walls of said scraper blade mount adjacent the forward and rearward sides of said blade body extend further from the base of said blade body than the depth of the groove of said scraper blade mount.

10. The scraper blade of claim 8 wherein:

the plurality of recessed features includes spaced slots or grooves on the rearward side of the scraper blade; or

the plurality of recessed features includes spaced semicircular slots or grooves on the rearward side of the scraper blade.

11. The scraper blade of claim 8 wherein said blade body includes polyurethane, ultra high molecular weight polyethylene, rubber, a plastic material, or a combination thereof.

12. A scraper blade for a conveyor comprising:

a blade body having first and second opposing ends and having a forward side and a rearward side between the first and second ends, wherein the second end of said blade body provides a scraping edge, and wherein the first end of said blade body provides a base for mounting the scraper blade on a blade mount of a conveyor,

said blade body having a plurality of elongated recessed features extending across the rearward side thereof, wherein the elongated recessed features are spaced apart and are generally parallel to the scraping edge of the first end of the scraper blade; and

a scraper blade mount to which the base at the first end of said blade body is affixed, said scraper blade mount having a shape of a “flattened W” defining a groove for receiving a scraper blade support bar therein,

wherein the groove of said scraper blade mount has beveled edges at the entrance to the groove to provide clearance for a fillet weld of the scraper blade support bar to which said scraper blade is mountable.

13. The scraper blade of claim 12 wherein the plurality of recessed features includes spaced slots or grooves on the rearward side of the scraper blade.

14. The scraper blade of claim 12 wherein the plurality of recessed features includes spaced semicircular slots or grooves on the rearward side of the scraper blade.

15. A scraper blade for a conveyor comprising:

a blade body having first and second opposing ends and having a forward side and a rearward side between the first and second ends, wherein the second end of said blade body provides a scraping edge, and wherein the first end of said blade body provides a base for mounting the scraper blade on a blade mount of a conveyor,

said blade body having a plurality of elongated recessed features extending across the rearward side thereof, wherein the elongated recessed features are spaced apart and are generally parallel to the scraping edge of the first end of the scraper blade:

a scraper blade mount to which the base at the first end of said blade body is affixed, said scraper blade mount having a shape of a “flattened W” defining a groove for receiving a scraper blade support bar therein; and

at least one raised feature extending across the rearward side of said blade body, wherein the at least one raised feature is generally parallel to the scraping edge of the first end of the scraper blade and is further from the second end than are the elongated recessed features, whereby the at least one raised feature provides an indication of wear of the scraper blade.

16. The scraper blade of claim 15 wherein said at least one raised feature includes a semi-circular protrusion on a trailing edge of said blade body specifically following the last of the elongated recessed features thereof in distance from the second end of said blade body, whereby the scraper blade may be replaced when worn to the semi-circular protrusion.

17. The scraper blade of claim 12 wherein walls of said scraper blade mount adjacent the forward and rearward sides of said blade body extend further from the base of said blade body than the depth of the groove of said scraper blade mount.

18. The scraper blade of claim 12 wherein said blade body includes polyurethane, ultra high molecular weight polyethylene, rubber, a plastic material, or a combination thereof.

19. The scraper blade of claim 15 wherein:

the plurality of recessed features includes spaced slots or grooves on the rearward side of the scraper blade; or

the plurality of recessed features includes spaced semicircular slots or grooves on the rearward side of the scraper blade.

20. The scraper blade of claim 15 wherein said blade body includes polyurethane, ultra high molecular weight polyethylene, rubber, a plastic material, or a combination thereof.