Saw enclosure construction

Claim 2

In saw enclosure construction for removing sawdust from the teeth of a rotary table saw; a housing having first and second side walls, end walls and a bottom wall forming an enclosure chamber open at the top adapted to be telescoped over a saw blade carried by a rotor shaft beneath a work table through which the saw blade projects upwardly to saw a work piece supported on the table; the housing when in saw enclosure position having the first side wall located parallel with and close to one saw blade face to form a narrow chamber portion, and having the second side wall located a greater distance from the other saw blade face to form a wide chamber portion; means sealing the wide chamber portion against the direct entry of exterior air thereinto on the wide chamber portion side of the saw blade; suction means connected with the chamber; inlet port means for the chamber connected with the narrow chamber portion at the top of the housing; and air currents induced in the inlet port means by the suction means flowing at high velocity through the narrow chamber portion and through the teeth of a rapidly rotating saw blade to enter the wide chamber portion from which the air currents are exhausted by the suction means.

Claim 3

The construction defined in claim 1 in which the open top of the housing above the wide chamber portion is sealed by felt sealing means mounted within the wide chamber portion on the second side wall and contacting the wide chamber face of the saw blade to provide the means sealing the wide chamber portion against the direct entry of exterior air.

Claim 4

The construction defined in claim 2 in which U-shaped slots open at the top are formed in the first and second housing side walls through which the rotor shaft extends; and in which felt sealing means extends between the side walls and the faces of the saw blade within the narrow and wide chamber portions along the edges of the U-shaped slots to seal the chamber against entry of exterior air through the U-shaped slots.

Claim 5

The construction defined in claim 3 in which exit port means is formed in the housing walls to provide the connection for the suction means with the chamber; and in which the cross-sectional area of the inlet port means is substantially equal to the cross-sectional area of the exit port means.

Claim 6

The construction defined in claim 4 in which the exit port means is generally rectangular in shape and is located at a corner between the housing bottom wall and one end wall and beneath the wide chamber portion.

Claim 7

The construction defined in claim 1 in which top guard means encloses that portion of the saw blade projecting upward through the work table, and in which the suction means communicates with the interior of the top guard means to remove chips produced above the table during a sawing operation.

Claim 8

In a table saw of the type having a saw blade carried by a rotor shaft mounted beneath a work table through which the saw blade projects upwardly to saw a work piece supported on the table; walls forming sawdust removal housing means enclosing that portion of the saw blade beneath the work table; the housing means having first and second side walls; the saw blade portion in the housing being located parallel with the side walls and closer to the first side wall than to the second, thereby forming narrow inlet chamber means on one side and wide exit chamber means on the other side of the saw blade; the housing means being formed with inlet port means adjacent the work table communicating with the inlet chamber means and being formed with exit port means communicating with the exit chamber means; the housing means walls forming the inlet port means being open at the top adjacent the work table; felt sealing means mounted within the wide exit chamber means at the top of the housing walls contacting the exit chamber face of the saw blade to seal the wide exit chamber means against the direct entry of exterior air; suction means connected with the exit port means; and the cross-sectional area of the inlet port means being approximately equal to the cross-sectional area of the exit port means, whereby the suction means induces a flow of high velocity air through the inlet chamber means from the inlet port means and thence across the saw blade teeth to enter the exit chamber means from which the air is exhausted by the suction means through the exit port means.

Claim 9

In a table saw of the type having a saw blade carried by a rotor shaft mounted beneath a work table through which the saw blade projects upwardly to saw a work piece supported on the table; walls forming sawdust removal housing means enclosing that portion of the saw blade beneath the work table; the housing means having first and second side walls; the saw blade portion in the housing being located parallel with the side walls and closer to the first side wall than to the second, thereby forming narrow inlet chamber means on one side and wide exit chamber means on the other side of the saw blade; the housing means being formed with inlet port means adjacent the work table communicating with the inlet chamber means and being formed with exit port means communicating with the exit chamber means; the housing means walls forming the inlet port means being open at the top adjacent the work table; felt sealing means mounted within the wide exit chamber means at the top of the housing walls contacting the exit chamber face of the saw blade to seal the wide exit chamber means against the direct entry of exterior air; suction means connected with the exit port means; and the cross-sectional area of the inlet port means being approximately equal to the cross-sectional area of the exit port means, whereby the suction means induces a flow of high velocity air through the inlet chamber means from the inlet port means and thence across the saw blade teeth to enter the exit chamber means from which the air is exhausted by the suction means through the exit port means.

Claim 10

The construction defined in claim 7, in which U-shaped slots open at the top are formed in the first and second side walls through which the rotor shaft extends; and in which felt sealing means extends between the side walls and the faces of the saw blade within the narrow inlet and wide exit chamber means along the edges of the U-shaped slots to seal the inlet and exit chamber means against entry of exterior air through the U-shaped slots.

Claim 11

The construction defined in claim 8 in which the exit port means is formed in the housing walls below the wide exit chamber means offset from the saw blade, and in which the exit port means is generally rectangular in shape.