Adjustable sawdust shear for bandmills

• US 4,606,251 A
• Filed: 07/31/1985
• Issued: 08/19/1986
• Est. Priority Date: 07/31/1985
• Status: Expired due to Fees

• Current Assignee: CAE Machinery Limited 3550 Lougheed Highway Vancouver BC Canada V5M 2A3
• Original Assignee: CAE Machinery Ltd. (CAE Incorporated)
• Inventors: Boileau, Sidney N.
• Primary Examiner(s): Meister, James M.
• Application Number:
  US06/761,209
• Time in Patent Office: 384 Days
• Field of Search: 83/168, 83/820, 83/788
• US Class Current: 83/168
• CPC Class Codes: B23Q 11/02 Devices for removing scrap from the cutting teeth of circular or non-circular cutters
• CPC Class Codes: Y10T 83/242 With means to clean work or tool
• CPC Class Codes: Y10T 83/707 By endless band or chain knife

Abstract

A sawdust shear apparatus to enable cleaning of the band saw of a band mill. The apparatus has a shear to contact the band saw and a housing to carry the shear. A recess is formed within the housing. The apparatus has a base and a piston extends from the base and is received within the recess with a fluid tight, slidable fit. Fluid can be supplied under pressure to the recess to move the shear outwardly from the base to clean the band saw. A spring or the like urges the shear towards the base. The apparatus is effective in cleaning a band saw with very little maintenance or inspection.

Claims

1. A sawdust shear apparatus to enable cleaning of the band saw of a band mill, the apparatus comprising:

a shear to contact the band saw;

a housing to carry the shear;

a first recess within the housing;

a base;

a piston extending from the base and being received within the first recess with a fluid tight, slidable fit;

means to supply fluid under pressure to the recess to move the shear outwardly from the base; and

means tending to urge the shear towards the base.

2. Apparatus as claimed in claim 1 in which the shear is located in a second recess in the housing.

3. Apparatus as claimed in claim 1 in which the base is formed with stops;

means on the housing to contact the stops to restrict excessive outward movement of the housing from the base.

4. Apparatus as claimed in claim 1 in which the piston is formed separately from, but rigidily attached to, the base.

5. Apparatus as claimed in claim 1 including an inlet in the base adapted to communicate with a supply of gas under pressure;

a passageway in the piston communicating with the inlet in the base whereby the gas under pressure may pass through the inlet and through the piston to move the housing on the piston.

6. Apparatus as claimed in claim 1 in which the piston and the first recess are of rectangular cross section.

7. Apparatus as claimed in claim 1 in which the means to urge the shear towards the base comprises at least one coil spring.