Jack assembly
AssigneeHorizon Global Americas Inc.
InventorsKawa-She Quoen Okerlund, Frank Drake
Life of this patent
Estimating the term…
Abstract
A jack assembly is shown and describe. The jack assembly may include a first tube having first and second end portions and a central portion between the first and second end portions, and a second tube positioned within the first tube and movable with respect to the first tube. The jack assembly may also include an expanded portion on the first tube, the expanded portion having a larger inner diameter than an inner diameter of the central portion, and a bushing attached to the expanded portion, where the bushing generally prevents contact between the first and second tubes.
Claims40
A jack assembly comprising:
- a first tube having first and second end portions and a central portion between said first and second end portions;
- a second tube positioned within said first tube and movable with respect to said first tube;
- an expanded portion on said first tube, said expanded portion having a larger inner diameter than an inner diameter of said central portion;
- and
- a bushing attached to said expanded portion, wherein said bushing generally prevents contact between said first and second tubes.
A jack assembly comprising:
- a first tube;
- a second tube positioned within said first tube and movable with respect to said first tube;
- a screw disposed within said second tube;
- a nut rotationally fixed relative to said second tube and threadingly engaged with said screw;
- and
- a bushing positioned within an opening in said second tube, said bushing having an opening threadingly engaged with said screw, wherein said bushing, nut and second tube move in unison relative to said first tube and whereby said bushing generally prevents contact between said first and second tubes.
A jack assembly comprising:
- a first tube;
- a second tube positioned within said first tube and movable with respect to said first tube;
- and
- a caster assembly connected to said second tube, said caster assembly comprising:
- a pin;
- and
- a vertical load supporting member having a first surface with at least one engagement member thereon, said engagement member engaged with a top of said pin thereby providing vertical loading to said pin and allowing relative rotation between said pin and said vertical load supporting member.
A jack assembly comprising:
- a first tube;
- a second tube positioned within said first tube and movable with respect to said first tube;
- a caster assembly connected to said second tube, said caster assembly comprising:
- a pin having a top surface and a sidewall;
- a cage member having a surface providing vertical load support to said top surface of said pin and having a sidewall that generally circumscribes at least a portion of said sidewall of said pin, wherein said pin is rotatable relative to said cage member.
Dependencies are inferred from the claim text.