US3674065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw guides
Assignee: Weyerhaeuser Co
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Filing: 1970-07-06
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Granted: 1972-07-04
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Expires: 1990-07-06
Abstract
Abstract A method and apparatus for guiding a saw blade wherein the saw guides comprise opposed bearing shoes located on opposite sides of the saw blade, at least one of the bearing shoes urged toward each other and against the saw blade by an external force such as a compressed spring. Compressed air, water, water-air mixture or other fluid is supplied to the interior recesses of each of the bearing shoes and acts to form a fluid bearing surface at the bearing shoe-saw blade interface. The external force exerted on the bearing shoes is transmitted to the saw blade through the fluid medium with substantially no contact of the saw blade with the bearing shoes.
Inventors
- 👤 Louis R Fairfield Jr
- 👤 Raymond A Van Vliet
- 👤 Thomas A Mclauchlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:28
CPC Classifications
B; B23; B23D; B23D59/00; B23D59/02; B23D47/00; B23D47/005; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/263; Y10T83/869; Y10T83/8789; Y10T83/8794; Y10T83/8878
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
128 words
Guide means for a saw blade comprising a. a pair of opposed bearing shoes having substantially coextensive opposing faces, the faces of the bearing shoes having a circumferential rim and a recessed interior portion, b. means to continuously apply an external guiding force to at least one of the bearing shoes so as to continuously urge it toward the other bearing shoe and against the side of a saw blade passing between, and c. means directing fluid to the interior recesses of each of the bearing shoes under sufficient pressure to provide a fluid bearing surface at the bearing shoe-saw blade interface for transmitting said guiding force from said bearing shoe to said side of said saw while establishing a clearance between said shoe rim and said saw.
Claim 2
Dependent Claim
128 words
Guide means for a saw blade comprising a. a pair of opposed bearing shoes having substantially coextensive opposing faces, the faces of the bearing shoes having a circumferential rim and a recessed interior portion, b. means to continuously apply an external guiding force to at least one of the bearing shoes so as to continuously urge it toward the other bearing shoe and against the side of a saw blade passing between, and c. means directing fluid to the interior recesses of each of the bearing shoes under sufficient pressure to provide a fluid bearing surface at the bearing shoe-saw blade interface for transmitting said guiding force from said bearing shoe to said side of said saw while establishing a clearance between said shoe rim and said saw.
Claim 3
Dependent Claim
16 words
Guide means according to claim 1 wherein the external force is provided by a compressed spring.
Claim 4
Dependent Claim
15 words
Guide means according to claim 1 wherein the external force is provided by pneumatic means.
Claim 5
Dependent Claim
17 words
Guide means according to claim 1 wherein the external force is provided by a resilient, elastomeric material.
Claim 6
Dependent Claim
16 words
Guide means according to claim 1 wherein one of the bearing shoes is fixed and immovable.
Claim 7
Dependent Claim
21 words
Guide means according to claim 1 wherein the bearing pad is composed of a material having a low coefficient of friction.
Claim 8
Dependent Claim
18 words
Guide means according to claim 1 including compressed air supply means in communication with said fluid directing means.
Claim 9
Dependent Claim
18 words
Guide means according to claim 1 including a liquid supply means in communication with said fluid directing means.
Claim 10
Dependent Claim
158 words
In a sawing machine having an endless saw blade which travels through the work zone of the machine the combination comprising a. a rigid support member, b. a pair of opposed bearing shoes mounted on the supporting member adjacent the point at which the saw blade enters the work performing zone, the bearing shoes having substantially coextensive opposing faces, the faces having a circumferential rim and a recessed interior portion, c. means to continuously apply an external guiding force from said support member to at least one of the bearing shoes to continuously urge it toward the other and against the saw blade, and d. means directing a fluid to the interior recesses of each of the bearing shoes under sufficient pressure to provide a fluid bearing surface at the bearing shoe-saw blade interface for transmitting said guiding force from said bearing shoes to said saw blade while establishing a clearance between said rim and said saw blade.
Claim 11
Dependent Claim
158 words
In a sawing machine having an endless saw blade which travels through the work zone of the machine the combination comprising a. a rigid support member, b. a pair of opposed bearing shoes mounted on the supporting member adjacent the point at which the saw blade enters the work performing zone, the bearing shoes having substantially coextensive opposing faces, the faces having a circumferential rim and a recessed interior portion, c. means to continuously apply an external guiding force from said support member to at least one of the bearing shoes to continuously urge it toward the other and against the saw blade, and d. means directing a fluid to the interior recesses of each of the bearing shoes under sufficient pressure to provide a fluid bearing surface at the bearing shoe-saw blade interface for transmitting said guiding force from said bearing shoes to said saw blade while establishing a clearance between said rim and said saw blade.
Claim 12
Dependent Claim
193 words
In a sawing machine having an endless saw blade which travels through the work zone of the machine the combination comprising a. a rigid support member, b. a pair of opposed bearing shoes mounted on the supporting member adjacent the point at which the saw blade enters the work performing zone, the bearing shoes having substantially coextensive opposing faces, the faces having a circumferential rim and a recessed interior portion. c. means tO continuously apply an external guiding force from said support member to at least one of the bearing shoes to continuously urge it toward the other and against the saw blade, d. means directing a fluid to the interior recesses of each of the bearing shoes under sufficient pressure to provide a fluid bearing surface at the bearing shoe-saw blade interface for transmitting said guiding force from said bearing shoes to said saw blade while establishing a clearance between said rim and said saw blade, and e. a second rigid support member and at least one force transmitting bearing block mounted on the supporting member adjacent to the saw blade, the bearing block mounted so as to contact the saw blade.
Claim 13
Dependent Claim
193 words
In a sawing machine having an endless saw blade which travels through the work zone of the machine the combination comprising a. a rigid support member, b. a pair of opposed bearing shoes mounted on the supporting member adjacent the point at which the saw blade enters the work performing zone, the bearing shoes having substantially coextensive opposing faces, the faces having a circumferential rim and a recessed interior portion. c. means tO continuously apply an external guiding force from said support member to at least one of the bearing shoes to continuously urge it toward the other and against the saw blade, d. means directing a fluid to the interior recesses of each of the bearing shoes under sufficient pressure to provide a fluid bearing surface at the bearing shoe-saw blade interface for transmitting said guiding force from said bearing shoes to said saw blade while establishing a clearance between said rim and said saw blade, and e. a second rigid support member and at least one force transmitting bearing block mounted on the supporting member adjacent to the saw blade, the bearing block mounted so as to contact the saw blade.
Claim 14
Dependent Claim
11 words
The sawing machine of claim 9 wherein the fluid is gaseous.
Claim 15
Dependent Claim
11 words
The sawing machine of claim 9 wherein the fluid is liquid.
Claim 16
Dependent Claim
13 words
The sawing machine of claim 9 wherein the fluid is a gas-liquid mixture.
Claim 17
Independent Claim
126 words
A method of guiding a saw blade through a work performing zone comprising a. providing a resilient guiding force against opposite sides of a saw blade by exertion of continuous external pressure on bearing shoes whose faces are in contact with the saw blade, b. introducing a fluid under pressure into a cavity in each of the opposed bearing shoes in contact with the saw blade, the fluid escaping from the guide shoe recesses along the bearing shoe-saw blade interfaces, and c. regulating the fluid pressure at the bearing shoe-saw blade interfaces to substantially support the bearing shoes on a thin fluid film providing both a fluid bearing surface and a medium to transmit the guiding force exerted on the bearing shoes to the saw blade.
Claim 18
Independent Claim
126 words
A method of guiding a saw blade through a work performing zone comprising a. providing a resilient guiding force against opposite sides of a saw blade by exertion of continuous external pressure on bearing shoes whose faces are in contact with the saw blade, b. introducing a fluid under pressure into a cavity in each of the opposed bearing shoes in contact with the saw blade, the fluid escaping from the guide shoe recesses along the bearing shoe-saw blade interfaces, and c. regulating the fluid pressure at the bearing shoe-saw blade interfaces to substantially support the bearing shoes on a thin fluid film providing both a fluid bearing surface and a medium to transmit the guiding force exerted on the bearing shoes to the saw blade.
Claim 19
Dependent Claim
12 words
The method according to claim 14 wherein the fluid is a gas.
Claim 20
Dependent Claim
12 words
The method according to claim 14 wherein the fluid is a liquid.
Claim 21
Dependent Claim
29 words
The method according to claim 14 wherein the fluid is a gas-liquid mixture introduced into the bearing pad recesses, the liquid acting to lubricate and cool the saw blade.
Claim 22
Dependent Claim
11 words
The method according to claim 17 wherein the liquid is water.
Claim 23
Dependent Claim
25 words
The method according to claim 17 wherein the liquid is a solvent for removing pitch and other residues from the surfaces of the saw blade.
Claim 24
Independent Claim
175 words
The method of guiding a saw blade through a work performing zone comprising a. providing a resilient guiding force against opposite sides of a saw blade by exertion of continuous external pressure on bearing shoes whose faces are in contact with the saw blade, b. introducing a fluid under pressure into a cavity in each of the opposed bearing shoes in contact with the saw blade, the fluid escaping from the guide shoe recesses along the bearing shoe-saw blade interfaces, said fluid is a gas-liquid mixture introduced into the bearing pad recesses, the liquid acting to lubricate and cool the saw blade, (c) regulating the fluid pressure at the bearing shoe-saw blade interfaces to substantially support the bearing shoes on a thin fluid film providing both a fluid bearing surface and a medium to transmit the guiding forces exerted on the bearing shoes to the saw blade, and d. providing an additional guiding force against the saw blade by means of at least one force transmitting bearing block in pressure contact with the saw blade.
Claim 25
Independent Claim
175 words
The method of guiding a saw blade through a work performing zone comprising a. providing a resilient guiding force against opposite sides of a saw blade by exertion of continuous external pressure on bearing shoes whose faces are in contact with the saw blade, b. introducing a fluid under pressure into a cavity in each of the opposed bearing shoes in contact with the saw blade, the fluid escaping from the guide shoe recesses along the bearing shoe-saw blade interfaces, said fluid is a gas-liquid mixture introduced into the bearing pad recesses, the liquid acting to lubricate and cool the saw blade, (c) regulating the fluid pressure at the bearing shoe-saw blade interfaces to substantially support the bearing shoes on a thin fluid film providing both a fluid bearing surface and a medium to transmit the guiding forces exerted on the bearing shoes to the saw blade, and d. providing an additional guiding force against the saw blade by means of at least one force transmitting bearing block in pressure contact with the saw blade.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |