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US 5,288,271 AGranted
Constant velocity universal joint assembly for downhole motor
AssigneeHouston Engineers, Inc.
InventorsSharon P. Nelson, Billy J. Roberts
Life of this patent
Estimating the term…
Abstract
An apparatus for use in transmitting torque between a first part rotatable about a fixed axis and a second part rotatable in a circular path about the axis, and which includes a torque bar having its ends connected to ends of the parts by universal joints.
Claims6
A constant velocity torque transmitting universal joint, comprising
- a first member having an opening in one end and a cylindrically shaped recess extending transversely of the opening,
- cylindrically shaped body means closely received in said recess for rotation about a first axis and having a slot in one side with parallel sides and holes on opposite sides of the slot,
- a pin extending into the holes in the body means and across the slot along a second axis perpendicular to and intersecting the first axis, and
- a second member having a tongue with flat sides closely fitting within the slot and a hole therethrough closely fitting about the pin for rotation about the second axis,
- said second member also having an enlarged head with a spherical surface adjacent the tongue which is concentric to the intersection of said first and second axes, and
- a flexible boot mounted on said second member and having a spherical surface which closely surrounds the spherical surface on the head to close a space between the members.
3 more elements
Apparatus for use in transmitting torque between a first part rotatable about a fixed axis and a second part rotatable in a circular path about the axis, comprising
- a first sub connectible at one end to the first part for rotation therewith and having an opening in the other end,
- a second sub connectible at one end to the second part for rotation therewith and having an opening in the other end,
- a torque bar, and
- a universal joint connecting each end of the torque bar to one of the subs respectively, including
- a cylindrically shaped recess extending transversely of the opening in the end of the sub,
- cylindrically shaped body means closely received in said recess for rotation about a first axis and having a slot in one side having parallel sides and holes on opposite sides of the slot,
- a pin extending into the holes in the body means and extending across the slot along a second axis perpendicular to and intersecting the first axis, and
- a tongue on the end of the torque bar having flat sides closely fitting within the slot and a hole therethrough closely receiving the pin for rotation about the second axis,
- each end of said torque bar also has an enlarged head with a spherical surface adjacent the tongue which is concentric to the intersection of said first and second axes, and
- a flexible boot is mounted on each sub and has a spherical surface which surrounds the bar to close a space between the bar and sub.
7 more elements
Dependencies are inferred from the claim text.