Back to results
US 4,232,877 AGranted
Dual ball towing hitch
OwnerRussell E. Miltoninventor
Life of this patent
Estimating the term…
Abstract
A dual ball towing hitch utilizes a first ball member having a first base support portion and a second ball member having a second base support portion which are connected to each other and a vehicle towbar by a common stud engaging each ball member through its support portion. The stud passes through a hole in the towbar whereby the base support portion of each ball member frictionally engages the towbar on opposite sides thereof. A hole in each ball member is adapted to receive a torque wrench and a counter-torque bar, respectively, to tighten the ball members to a predetermined frictional torque.
Claims5
A trailer hitch comprising
- a first ball member comprising a first spheroid portion having a vertical axis of rotation,
- a first base support portion connected to said first spheroid portion, said first base support portion having an axis of rotation coincident with said vertical axis of rotation of said first spheroid portion,
- means defining a first hole in said first ball member, said first hole intersecting said vertical axis of rotation of said first spheroid portion, with the axis of rotation of said first hole perpendicular to said vertical axis of rotation of said first spheroid portion,
- means defining a second hole projecting through said first base support portion a part of the distance through said first ball member, the axis of rotation of said second hole being coincident with the vertical axis of rotation of said first spheroid portion,
- a second ball member comprising a second spheroid portion having a vertical axis of rotation,
- a second base support portion connected to said second spheroid portion, said second base support portion having an axis of rotation coincident with said vertical axis of rotation of said second spheroid portion,
- means defining a third hole in said second ball member, said third hole intersecting said vertical axis of rotation of said second spheroid portion, with the axis of rotation of said third hole perpendicular to said vertical axis of rotation of said second spheroid portion,
- a towbar attached to a vehicle, and
- means for connecting said first ball member to said second ball member and to said towbar, with said vertical axis of said first spheroid portion coincident with the vertical axis of rotation of said second spheroid portion.
6 more elements
Dependencies are inferred from the claim text.