US4805504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety cover for miter saw
Assignee: Makita Corp
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Filing: 1987-12-24
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Granted: 1989-02-21
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Expires: 2007-12-24
Abstract
Abstract A power miter saw includes a support base and a mounting arm connected to the support base for swinging movement around a vertical axis. A miter saw unit is pivotally connected to the mounting arm. The miter saw unit includes a circular saw blade and a drive motor for driving the saw blade. A blade case is attached to the miter saw unit and is adapted to partially encase the saw blade so as to provide an exposed operational portion of the saw blade. A movable safety cover is mounted on the blade case so as to cover the exposed operational portion of the saw blade. Actuating means is disposed between the mounting arm and the safety cover for directly associating the safety cover with the pivotal movement of the miter saw unit.
Inventors
- 👤 Fusao Fushiya
- 👤 Nobuhiro Inoue
- 👤 Kazunori Tsuge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:19
CPC Classifications
B; B27; B27G; B27G19/00; B27G19/02; B27G19/025; Y; Y10; Y10T; Y10T83/00; Y10T83/606; Y10T83/768; Y10T83/7755; Y10T83/7788
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
203 words
A power miter saw comprising: a support base; a mounting arm connected to said support base for swinging movement around a vertical axis; a miter saw unit pivotally connected to said mounting arm for movement between a rest position and an operational position, said saw unit having a circular saw blade and a drive motor for driving said saw blade; a blade case attached to said miter saw unit and adapted to partially encase said saw blade so as to provide an exposed operational portion of said saw blade; a movable safety cover mounted on said blade case and adapted to cover said exposed operational portion of said new blade; and actuating means disposed between said mounting arm and said safety cover, associating said safety cover with the pivotal movement of said miter saw unit, for fixing said safety cover to said saw unit for limited movement of said cover to partially uncover the operational portion of said saw blade in response to movement of said saw unit along a predetermined distance from said rest position, and for freeing said safety cover for movement independently of said saw unit upon movement of said saw unit beyond said predetermined distance from said rest position.
Claim 2
Dependent Claim
203 words
A power miter saw comprising: a support base; a mounting arm connected to said support base for swinging movement around a vertical axis; a miter saw unit pivotally connected to said mounting arm for movement between a rest position and an operational position, said saw unit having a circular saw blade and a drive motor for driving said saw blade; a blade case attached to said miter saw unit and adapted to partially encase said saw blade so as to provide an exposed operational portion of said saw blade; a movable safety cover mounted on said blade case and adapted to cover said exposed operational portion of said new blade; and actuating means disposed between said mounting arm and said safety cover, associating said safety cover with the pivotal movement of said miter saw unit, for fixing said safety cover to said saw unit for limited movement of said cover to partially uncover the operational portion of said saw blade in response to movement of said saw unit along a predetermined distance from said rest position, and for freeing said safety cover for movement independently of said saw unit upon movement of said saw unit beyond said predetermined distance from said rest position.
Claim 3
Dependent Claim
201 words
A power miter saw comprising: a support base; a mounting arm connected to said support base for swinging movement around a vertical axis; a miter saw unit pivotally connected to said mounting arm and having a circular saw blade and a drive motor for driving said saw blade; a blade case attached to said miter saw unit and adapted to partially encase said saw blade so as to provide an exposed operational portion of said saw blade; a movable safety cover mounted on said blade case and adapted to cover said exposed operational portion of said saw blade; and actuating means disposed between said mounting arm and said safety cover, for directly associating said safety cover with the pivotal movement of said miter saw unit, said actuating means comprising: a first engaging pin mounted on said safety cover; a second engaging pin mounted on said mounting arm; and an actuating link pivotally supported on said blade case; said actuating link having a first cam groove formed in one end thereof in generally opposed relation to said first engaging pin for moving said safety cover and having a second cam groove formed in the other end for controlling the pivotal movement thereof.
Claim 4
Dependent Claim
201 words
A power miter saw comprising: a support base; a mounting arm connected to said support base for swinging movement around a vertical axis; a miter saw unit pivotally connected to said mounting arm and having a circular saw blade and a drive motor for driving said saw blade; a blade case attached to said miter saw unit and adapted to partially encase said saw blade so as to provide an exposed operational portion of said saw blade; a movable safety cover mounted on said blade case and adapted to cover said exposed operational portion of said saw blade; and actuating means disposed between said mounting arm and said safety cover, for directly associating said safety cover with the pivotal movement of said miter saw unit, said actuating means comprising: a first engaging pin mounted on said safety cover; a second engaging pin mounted on said mounting arm; and an actuating link pivotally supported on said blade case; said actuating link having a first cam groove formed in one end thereof in generally opposed relation to said first engaging pin for moving said safety cover and having a second cam groove formed in the other end for controlling the pivotal movement thereof.
Claim 5
Dependent Claim
98 words
The power miter saw as defined in claim 1 wherein said actuating means comprises: a first engaging pin mounted on said safety cover; a second engaging pin mounted on said mounting arm; and an actuating link pivotally supported on said blade case; said actuating link having a first cam groove formed in one end thereof in generally opposed relation to said first engaging pin for moving said safety cover and having a second cam groove formed in the other end in generally opposed elation to said second engaging pin for controlling the pivotal movement of the safety cover.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |