Back to results
US 4,960,026 AGranted
Quick action band saw blade tensioning device
AssigneeEmerson Electric Co.
InventorDaniel A. Terpstra
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeEmerson Electric Co.
InventorDaniel A. Terpstra
Estimating the term…
A quick action band saw blade tensioning device is disclosed. The band saw blade tensioning device is used in a band saw machine having at least upper and lower band saw supporting wheels operatively rotatably mounted to a supporting frame. The band saw blade tensioning device includes a wheel support pivotally mounted to the supporting frame about a wheel support pivotal mount, one of the upper and lower band saw supporting wheels being rotatably mounted to the wheel support about a wheel support rotatable mount, and an adjustable device for pivotally moving the wheel support and its rotatably mounted band saw about the wheel support pivotal mount so as to apply a greater or lesser tensioning force to the band saw as desired. The adjustable device includes an elongated wire spring which is attached to the pivoting wheel support to provide the desired tensioning force to the band saw blade. Tension is maintained by clamping the deflected spring into place.
A band saw machine including a supporting frame, at least upper and lower band saw supporting wheels operatively rotatably mounted to the supporting frame, a band saw entrained and driven about the upper and lower band saw supporting wheels, and a band saw tensioning assembly including a wheel support pivotally mounted to the supporting frame about a wheel support pivotal mount, one of said upper and lower band saw supporting wheels being rotatably mounted to the wheel support about a wheel support rotatable mount, a flexible elongated wire spring for adjustably pivotally moving the wheel support and its rotatably mounted band saw supporting wheel about the wheel support pivotal mount so as to apply a tensioning force to the band saw as desired, said flexible elongated wire spring having first and second ends, one of said ends being fixed to said wheel support and the other of said ends being adjustably movable in a predetermined arc about the wheel support pivotal mount, said flexible elongated wire spring when adjustably moved in the predetermined arc bending throughout the length thereof for imparting a moment to the wheel support pivotal mount in order to apply a tensioning force to the band saw blade, and means for holding said other end of the elongated wire spring at various positions along the predetermined arc.
A band saw machine including a supporting frame, at least upper and lower band saw supporting wheels operatively rotatably mounted to the supporting frame, a band saw entrained and driven about the upper and lower band saw supporting wheels, and a band saw tensioning assembly including a wheel support pivotally mounted to the supporting frame about a wheel support pivotal mount, one of said upper and lower band saw supporting wheels being rotatably mounted to the wheel support about a wheel support rotatable mount generally centrally positioned on said wheel support, means for adjustably pivotally moving the wheel support and its rotatably mounted band saw supporting wheel about the wheel support pivotal mount so as to apply a tensioning force to the band saw as desired, and means for holding the wheel support in a stable plane relative to the frame during adjustment and tensioning of the band saw, said last mentioned means comprising a spaced point support system in operative engagement between said wheel support and said frame, each point support in said spaced point support system engaging both said wheel support and said frame and holding said wheel support in a stable parallel plane relative to said frame during adjustment and tensioning of said band saw.
In a band saw machine having a band saw entrained and driven about at least upper and lower band saw supporting wheels which are operatively rotatably mounted in a supporting frame, wherein the improvement comprises a band saw tensioning assembly including a wheel support pivotally mounted to the supporting frame about a wheel support pivotal mount, one of said upper and lower band saw supporting wheels being rotatably mounted to the wheel support about a wheel support rotatable mount, and a flexible elongated wire spring for adjustably pivotally moving said wheel support and its rotatably mounted band saw supporting wheel about the wheel support pivotal mount so as to apply a tensioning force to the band saw as desired, said flexible elongated wire spring having first and second ends, one of said ends being fixed to said wheel support and the other of said ends being adjustably movable in a predetermined arc about the wheel support pivotal mount, said flexible elongated wire spring when adjustably moved in the predetermined arc bending throughout the length thereof for imparting a moment to the wheel support pivotal mount in order to apply a tensioning force to the band saw blade, and means for holding said other end of the elongated wire spring at various positions along the predetermined arc.
Dependencies are inferred from the claim text.