US4606251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable sawdust shear for bandmills
Assignee: CAE Machinery Ltd
•
Filing: 1985-07-31
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Granted: 1986-08-19
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Expires: 2005-07-31
Abstract
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.
Inventors
- 👤 Sidney N. Boileau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:15
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/02; Y; Y10; Y10T; Y10T83/00; Y10T83/242; Y10T83/707
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
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.
Claim 2
Dependent Claim
85 words
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.
Claim 3
Dependent Claim
19 words
Apparatus as claimed in claim 1 in which the shear is located in a second recess in the housing.
Claim 4
Dependent Claim
33 words
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.
Claim 5
Dependent Claim
20 words
Apparatus as claimed in claim 1 in which the piston is formed separately from, but rigidily attached to, the base.
Claim 6
Dependent Claim
55 words
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.
Claim 7
Dependent Claim
19 words
Apparatus as claimed in claim 1 in which the piston and the first recess are of rectangular cross section.
Claim 8
Dependent Claim
23 words
Apparatus as claimed in claim 1 in which the means to urge the shear towards the base comprises at least one coil spring.
References Cited (Backward Citations)
US2741281A
Cited
US2807294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |