Back to results
US 5,669,296 AGranted
High ratio screw actuated press
OwnerAlan R. Newtoninventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerAlan R. Newtoninventor
Estimating the term…
A high ratio screw actuated device used as a press to provide high pressure under small increments of movement which includes a frame or base for a housing rotatably carrying a screw having large pitch threads, a nut within said housing receiving said screw and having internal threads of the same pitch as the screw threads but a pitch diameter larger than the screw pitch diameter, a thrust/radial bearing encompassing said nut, a compression spring in said housing urging said nut downward, the free end of said screw carrying one piece of a two-piece die set, a guide rod having one end received in a socket in the frame, and a motor mounted on the guide rod for slidable movement thereof, the upper end of the screw terminating in a coupling receiving the drive end of the motor to engage the screw in rotational movement. A speed controller operated by a switch provides reversible rotation of the screw to advance and retract said screw and open and close the two-piece die, and a set screw acts to adjust the alignment of the centerlines of the screw and nut to adjust the ratio force of the press. Optionally, a torsion spring wrap clutch or resilient pawl engaging the nut outer surface prevents nut rotation in one direction which would otherwise prevent backing off of the screw.
A high ratio screw actuated press for small incremental feed in a high pressure operation, comprising a frame including a base and a housing, an elongated screw rotatably mounted in said housing, said screw having an externally threaded surface with a pitch, an enlarged nut rotatably mounted in said housing and having an internally threaded surface with an identical pitch to the pitch of said screw, the nut having an internal pitch diameter, and the screw having an external pitch diameter, the internal pitch diameter of said nut being greater than the external pitch diameter of said screw, said screw having a lower end and an upper end, the upper end provided with a socket formed therein, means to rotate said screw including a driving end conformably received in said socket, means on said lower end of said screw for mounting a die thereon, and means mounted on said base below and axially aligned with said lower end of said screw for receiving a complementary die adapted to cooperate with said first mentioned die, the nut including a longitudinal centerline and the screw including a longitudinal axis, and means to adjust the longitudinal centerline of said nut relative to the longitudinal axis of said screw.
A high ratio screw actuated press for small incremental feed in a high pressure operation, comprising a frame including a base and a housing, an elongated screw rotatably mounted in said housing, said screw having an externally threaded surface with a pitch, an enlarged nut rotatably mounted in said housing and having an internally threaded surface with an identical pitch to the pitch of said screw, the nut having an internal pitch diameter, and the screw having an external pitch diameter, the internal pitch diameter said nut being greater than the external pitch diameter of said screw, said screw having a lower end and an upper end, the upper end provided with a socket formed therein, means to rotate said screw including a driving end conformably received in said socket, means on said lower end of said screw for mounting a die thereon, and means mounted on said base below and axially aligned with said lower end of said screw for receiving a complementary die adapted to cooperate with the die received in said lower end of said screw, and wherein the nut includes a longitudinal centerline and the screw includes a longitudinal axis, and further including means to adjust the longitudinal centerline of said nut relative to the longitudinal axis of said screw, said nut being capable of adjustment between a position of axial alignment between said longitudinal axis of said screw and said longitudinal centerline of said nut to a position where said longitudinal centerline of said nut is radially offset relative to said longitudinal axis of said screw.
Dependencies are inferred from the claim text.