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US 4,082,151 AGranted
Cam mounting for an impact tool
AssigneeHughes Tool Company
InventorJames L. Finney
Life of this patent
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AssigneeHughes Tool Company
InventorJames L. Finney
Estimating the term…
A motor driven cam and spring impact tool with an improved mounting for the cam. The impact tool includes a driving shaft for rotation relative to the housing. A hammer is positioned in the housing for axial movement with respect to the housing. An annular cam with cam rollers translates the rotational motion of the driving shaft to reciprocating motion of the hammer. A spring urges the hammer in one direction to cause an impact upon each reciprocation. A collar, driven by the shaft, is connected to the cam or selectively to the rollers for rotating one with respect to the other. The non rotating member is attached to the hammer to cause reciprocation. A pair of pins are connected between the cam and selectively the collar or hammer, and spaced apart 180.degree. to allow the cam to tip about the axes of the pins. This equalizes the load imposed by the rollers upon the cam.
In a motor driven cam and spring means impact tool having a housing, a driving shaft mounted in the housing for rotation relative to the housing, a hammer positioned in the housing for axial movement with respect to the driving shaft, an annular camming assembly having components including a cam and a pair of cam rollers mounted on opposite sides of the hammer for translating rotational motion of the driving shaft to reciprocal motion of the hammer, and transmission means connected to the driving shaft and to the camming assembly to rotate one of the components with respect to the other, the non rotating component being attached to the hammer, and improved mounting for the cam comprising:
In a motor driven impact tool having a housing, a driving shaft mounted in the housing for rotation relative to the housing, a hammer positioned in the housing for axial movement with respect to the driving shaft, an annular cam encircling the hammer, a pair of cooperating cam rollers mounted to the hammer on opposite sides by an axle mounted transverse to the axis of the hammer for translating rotational motion of the driving shaft to reciprocal motion of the hammer, and spring means for urging the hammer in one direction to provide an impact, an improved cam mounting comprising:
A motor driven impact tool comprising in combination:
Dependencies are inferred from the claim text.