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US 6,606,931 B1Granted
Bevel locking system for a sliding compound miter saw
AssigneeBlack & Decker Inc.
InventorsMark E. Brunson, William R. Stumpf
Life of this patent
Estimating the term…
Abstract
A compound miter saw has a unique locking system for locking the bevel angle support housing to the table assembly once the desired bevel angle has been set. The locking system includes a cam and a handle each with an angular cam surface. When the two cam surfaces are aligned, the support housing is free to pivot around a supporting shaft. When the handle is rotated on the shaft, the two cam surfaces are moved to a non-aligned position. This non-alignment of cam surfaces causes axial movement of the cam along the shaft which in turn forces the support housing against the table assembly to lock the support housing in the desired bevel angle.
Claims23
A device for performing working operations on a workpiece, said device comprising:
- a table defining a horizontal work surface and a bore extending generally parallel to said horizontal work surface;
- a shaft disposed within said bore defined by said table, said shaft extending outwardly from said table generally parallel to said horizontal surface;
- a support housing supporting a motor and a working tool driven by said motor, said support housing being disposed on said shaft adjacent to said table, said support housing and said motor being pivotable around said shaft between a first position where said support housing is generally perpendicular to said horizontal work surface of said table and a second position where said support housing is at an acute angle with respect to said horizontal work surface of said table;
- a detent system disposed between said table and said support housing, said detent system working automatically to releasably secure said support housing to said table such that said support housing is located at a specified angle with respect to said table, said detent system comprising:
- a ball;
- a compression spring disposed between said ball and one of said table and said support housing, said compression spring biasing said ball towards the other end of said table and said support housing;
- and
- at least one detent defined by the other of said table and said support housing, said ball engaging said detent to releasably secure said support housing at said specified angle.
5 more elements
A device for performing working operations on a workpiece, said device comprising:
- a table defining a horizontal work surface and a bore extending generally parallel to said horizontal work surface;
- a shaft disposed within said bore defined by said table, said shaft extending outwardly from said table generally parallel to said horizontal surface;
- a support housing supporting a motor and a working tool driven by said motor, said support housing being disposed on said shaft adjacent to said table, said support housing and said motor being pivotable around said shaft between a first position where said support housing is generally perpendicular to said horizontal work surface of said table and a second position where said support housing is at an acute angle with respect to said horizontal work surface of said table;
- a detent system disposed between said table and said housing, said detent system working automatically to releasably secure said support housing to said table such that said support housing is located at a specified angle with respect to said table, said detent system comprising:
- a pressing member;
- a compression spring disposed between said pressing member and one of said table and said support housing, said compression spring biasing said pressing member towards the other of said table and said support housing;
- and
- an abutting surface defined by the other of said table and said support housing, said abutting surface having a recess formed therein, said pressing member engaging said recess to releasably secure said support housing at said specified angle.
5 more elements
A device for performing working operations on a workpiece, said device comprising:
- a base;
- a table rotatably disposed on said base, said table defining a horizontal work surface and a bore extending generally parallel to said horizontal work surface;
- a shaft disposed within said bore defined by said table, said shaft extending outwardly from said table generally parallel to said horizontal surface;
- a support housing supporting a motor and a working tool driven by said motor, said support housing being disposed on said shaft adjacent to said table, said support housing and said motor being pivotable around said shaft between a first position where said support housing is generally perpendicular to said horizontal work surface of said table and a second position where said support housing is at an acute angle with respect to said horizontal work surface of said table;
- and
- a detent system disposed between said table and said support housing, said detent system being continuously activated to releasably secure said support housing to said table such that said support housing is located at a specified angle with respect to said table, said detent system comprising:
- a ball;
- a compression spring disposed between said ball and one of said table and said support housing, said compression spring biasing said ball towards the other end of said table and said support housing;
- and
- at least one detent defined by the other of said table and said support housing, said ball engaging said detent to releasably secure said support housing at said specified angle.
7 more elements
Dependencies are inferred from the claim text.