Saw blades and method of making same
AssigneeBlack & Decker Inc.
InventorBrian K. Jackson
Life of this patent
Estimating the term…
Abstract
A saw blade for a two-blade, contra-reciprocating saw has two strips spot welded together. Teeth are formed by scallops cut along an edge of each strip with lands between these scallops. Abrasive grit, such as tungsten carbide chips, is brazed on the teeth except on the sides of the teeth which rub against each other as the blades reciprocate. The main cutting surfaces are the lands which are longer on one strip than the other. The arrangement is useful for cutting masonry and metal products and reduces stresses on the blade.
Claims11
A blade for a contra-reciprocating two-blade saw including a support guide for the blades, the blade comprising:
- first and second strips secured together to form a single unitary blade;
- said first strip having teeth formed thereon;
- grit particles adhered to the teeth on only one side of said first strip;
- said second strip being secured to said one side of the first strip;
- said second strip having teeth formed thereon in staggered relation to the teeth formed on said first strip;
- the teeth on said second strip having grit particles adhered thereto;
- said teeth comprising flat lands separated by curved scallops along an edge of each said strip;
- and
- the teeth having a pitch which is the same on each strip, with the lands on the second strip being longer than the lands on the first strip.
A saw blade for a two-blade, contra-reciprocating saw, the blade comprising:
- two elongate strips of steel disposed side-by-side and spot welded together;
- an edge of each strip having teeth formed therealong, said teeth being formed by scallops separated by raised flat lands;
- abrasive grit particles adhered on said teeth, the teeth on one of said strips having no grit particles on a side thereof facing away from the other of said strips;
- the land on said other of said strips being longer than the lands on said one of said strips;
- and
- the longer lands forming the main cutting surfaces of the blade.
A saw blade, comprising:
- two elongate strips disposed side-by-side and secured together to form a single blade extending in a lengthwise direction;
- a plurality of teeth spaced apart in said lengthwise direction along a cutting edge of the blade;
- said teeth being formed individually on both of said strips, the teeth on each strip being formed by raised lands separated by scallops;
- the teeth on one strip alternating in said lengthwise direction with the teeth on the other strip;
- the land of the teeth of said one strip being longer than the lands of the teeth of said other strip;
- and
- abrasive particles adhered on the teeth of both strips.
Dependencies are inferred from the claim text.