Sonically actuated shaft with coolant jacket

Claim 2

The combination comprising: a shaft dimensioned to oscillate as a half wavelength resonator along its longitudinal axis at a predetermined frequency; means disposed for coupling sonic energy to said shaft to cause said shaft to undergo such oscillatory motion; a water jacket surrounding a portion of said shaft at a location outside the nodal plane of longitudinal motion occurring on said shaft, and said jacket providing an annular chamber about said shaft portion; means disposed on said jacket for filling said chamber with a liquid coolant under pressure; a pair of radially disposed rims on said jacket for engaging said shaft portion and made of a material having a substantially low coefficient of friction with said shaft portion, and said rims being sufficiently flexible to move into liquidtight sealing contact with said shaft portion responsive to the pressure of the coolant in said chamber whereby to effect a liquidtight seal between said jacket and shaft portion.

Claim 3

The combination as set forth in claim 1, said rims being made of fluorocarbon synthetic material.

Claim 4

The combination as set forth in claim 1, each of said rims being of L-shape having a first surface disposed along the radial axis of said shaft and a second surface disposed along the longitudinal axis of said shaft.

Claim 5

The combination comprising: a shaft dimensioned to oscillate as a half wavelength resonator along its longitudinal axis at a predetermined frequency and adapted to undergo rotation; means disposed for coupling sonic energy to said shaft to cause said shaft to undergo such oscillatory motion along its axial direction while rotating; a water jacket made of fluorocarbon material surrounding a portion of said shaft at a location outside the nodal plane of longitudinal motion occurring on said shaft, and said jacket providing an annular chamber about said shaft portion; means disposed on said jacket for filling said chamber with liquid under pressure; a pair of radially disposed rims forming an integral part said jacket engaging said shaft portion, and said rims being sufficiently flexible to move into liquidtight sealing contact with said shaft portion responsive to the pressure of the liquid in said chamber, and to move in a direction to release the sealing contact with said shaft portion in the absence of liquid pressure, and means for supporting said jacket substantially nonrotating about said shaft at said location outside the nodal plane.

Claim 6

The combination comprising: a shaft dimensioned to oscillate as a half wavelength resonator along its longitudinal axis at a predetermined frequency and adapted to undergo rotation; means disposed for coupling sonic energy to said shaft to cause said shaft to undergo such oscillatory motion along its axial direction while rotating; a water jacket made of fluorocarbon material surrounding a portion of said shaft at a location outside the nodal plane of longitudinal motion occurring on said shaft, and said jacket providing an annular chamber about said shaft portion; means disposed on said jacket for filling said chamber with liquid under pressure; a pair of radially disposed rims forming an integral part said jacket engaging said shaft portion, and said rims being sufficiently flexible to move into liquidtight sealing contact with said shaft portion responsive to the pressure of the liquid in said chamber, and to move in a direction to release the sealing contact with said shaft portion in the absence of liquid pressure, and means for supporting said jacket substantially nonrotating about said shaft at said location outside the nodal plane.

Claim 7

The combination as set forth in claim 4, said shaft portion forming a chuck for a hollow core tool bit, and means for feeding liquid from said chamber through a cavity of said chuck to the core of said tool bit.