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US 5,203,245 AGranted
Swinging blade guard assembly
AssigneeEmerson Electric Co.
InventorDaniel A. Terpstra
Life of this patent
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AssigneeEmerson Electric Co.
InventorDaniel A. Terpstra
Estimating the term…
A swinging blade guard assembly for a motor driven saw blade movable from an upper at rest to a lower operational position is disclosed. An upper blade guard is fixed to a pivotally mounted supporting arm that carries the motor driven saw blade and upper blade guard. A lower swinging blade guard is pivotally mounted to the upper blade guard for fully covering the blade in its at rest position and for exposing the saw blade when moved to its operational position. The swinging blade guard assembly includes an elongated link that is pivotally attached at one end to a frame support and includes a pre-configured slot at an opposite end which receives a slidable pin attached to the lower swinging blade guard adjacent its pivotal mounting to the upper blade guard. A bearing element is also attached to the upper blade guard in laterally spaced relationship to the pin for engaging an upper surface of the elongated link. Rotation of the saw blade from an upper at rest to a lower operational position causes the bearing to press against the side of the link while also causing edge surface areas surrounding the pre-configured slot in the link to press against the pin to rotate the swinging blade guard assembly for exposure of the saw blade.
In a motor driven saw blade including a supporting arm pivotally mounted at one end to a frame support with a rotatably mounted motor driven saw blade at an opposite end of said supporting arm, said motor driven saw blade being movable about the pivotal mounting of the supporting arm from an upper at rest to a lower operational position, an upper blade guard fixed to said supporting arm for encasing upper areas of said saw blade, and a lower swinging blade guard pivotally mounted to said upper blade guard for fully covering the blade when in its rest position and for exposing the saw blade when moved to its operational position, the improvement comprising:
A swinging blade guard assembly for a motor driven saw blade including a supporting arm pivotally mounted at one end to a frame support with the rotatably mounted motor driven saw blade at an opposite end of said supporting arm, said motor driven saw blade being movable about the pivotal mounting of the supporting arm from an upper at rest to a lower operational position, an upper blade guard fixed to said supporting arm for encasing upper areas of said saw blade, a lower swinging blade guard pivotally mounted to said upper blade guard for fully covering the blade when in its rest position and for exposing the saw blade when moved to its operational position, an elongated link pivotally attached at one end to said frame support and having a pre-configured slot at an opposite end which receives a slidable pin that is attached to the lower swinging blade guard adjacent the pivotal mounting of the lower swinging blade guard to the upper blade guard, and a bearing element attached to the upper blade guard in laterally spaced relationship to said pin for engaging an upper surface of the elongated link, whereby rotation of the saw blade from an upper at rest to a lower operational position causes the bearing to press against the side of the link while also causing edge surface areas surrounding the pre-configured slot in the link to press against the pin to rotate the lower swinging blade guard for exposure of said saw blade.
A swinging blade guard assembly for a motor driven saw blade including a supporting arm pivotally mounted at one end to a frame support with the rotatably mounted motor driven saw blade at an opposite end of said supporting arm, said motor driven saw blade being movable about the pivotal mounting of the supporting arm from an upper at rest to a lower operational position, an upper blade guard fixed to said supporting arm for encasing upper areas of said saw blade, a lower swinging blade guard pivotally mounted to said upper blade guard for fully covering the blade when in its rest position and for exposing the saw blade when moved to its operational position, an elongated link pivotally attached at one end to said frame support and having a pre-configured slot at an opposite end which receives a slidable pin that is attached to the lower swinging blade guard adjacent the pivotal mounting of the lower swinging blade guard to the upper blade guard, and a bearing element attached to the upper blade guard in laterally spaced relationship to said pin for engaging a pre-configured shoulder on an upper surface of the elongated link, and the pre-configured shoulder on the upper surface of said elongated link cooperating with the pre-configured slot to control the slidable movement of the slidable pin in said pre-configured slot for controlled exposure of the lower swinging blade guard relative to the saw blade, whereby rotation of the saw blade from an upper at rest to a lower operational position causes the bearing to press against the upper surface including the pre-configured shoulder of the link while also causing edge surface areas surrounding the pre-configured slot in the link to press against the pin to rotate the lower swinging blade guard for exposure of said saw blade.
Dependencies are inferred from the claim text.