Aircraft landing gear snow ski tow bar

• US 7,234,665 B2
• Filed: 11/08/2004
• Issued: 06/26/2007
• Est. Priority Date: 11/08/2004
• Status: Expired due to Fees

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Zimmerle, Andrew R., MacGregor, Kenneth R.
• Primary Examiner(s): DINH, TIEN QUANG
• Application Number:
  US10/983,920
• Publication Number:
  US 20060097106A1
• Time in Patent Office: 960 Days
• Field of Search: 244/50, 280/403, 280/443, 280/493, 180/14.4, 180/14.6
• US Class Current: 244/50
• CPC Class Codes: B64F 1/224 Towing bars

Abstract

A snow ski tow bar adapts a prior art aircraft tow bar for attachment to a landing gear of an aircraft to which a snow ski has been attached. The snow ski tow bar modifies an existing tow bar with a second set of connectors that adapt the snow ski tow bar for connection to the landing gear of the aircraft having the snow ski. In addition, the existing wheels of the prior art tow bar are replaced with a second set of wheels that are spaced outwardly from the original wheels. This positions the second set of wheels on the snow ski tow bar where they are extended outside the lateral width of the snow ski on the landing gear. The second set of wheels support the tow bar in a position above the snow ski with the second set of tow bar connectors connected to the aircraft landing gear.

Claims

1. An aircraft tow bar that is adapted for attachment to an aircraft wheel with a snow ski attached to landing gear structure associated with the aircraft wheel, the tow bar comprising:

a pair of prongs that are positioned relative to each other with a lateral spacing between the prongs, the lateral spacing being dimensioned to receive the aircraft wheel with its associated said snow ski in the lateral spacing between the pair of prongs;

at least one longitudinally extending rod connected to one of the pair of prongs, the rod having a proximal end that is adapted for connection to a motive source to move the rod and its said one prong;

at least one tow bar wheel connected to the prongs for supporting the prongs on a surface for movement of the prongs over the surface in response to moving the rod;

a first pair of connectors on the pair of prongs, the first pair of connectors being positioned laterally opposite each other on laterally opposite sides of the lateral spacing between the pair of prongs, the first pair of connectors being adapted for connection to the aircraft wheel on laterally opposite sides of the aircraft wheel; and

a second pair of connectors on the pair of prongs, the second pair of connectors being positioned laterally opposite each other on laterally opposite sides of the lateral spacing between the pair of prongs, the second pair of connectors being adapted for connection to the aircraft wheel on laterally opposite sides of the aircraft wheel.

2. The tow bar of claim 1, further comprising:

the first pair of connectors being positioned on the pair of prongs for connection to the aircraft wheel when the snow ski is not attached to said landing gear associated with the aircraft wheel, and the second pair of connectors being positioned on the pair of prongs for connection to the aircraft wheel when the snow ski is attached to the landing gear associated with the aircraft wheel.

3. The tow bar of claim 1, further comprising:

the second pair of connectors being positioned on the pair of prongs below the first pair of connectors.

4. The tow bar of claim 3, further comprising:

the second pair of connectors being positioned on the pair of prongs where the pair of prongs are positioned above the ski when the second pair of connectors are connected to the aircraft wheel.

5. The tow bar of claim 3, further comprising:

the tow bar wheels being one of a pair of tow bar wheels connected to the pair of prongs at positions laterally opposite each other on laterally opposite sides of the lateral spacing between the pair of prongs.

6. The tow bar of claim 3, further comprising:

the tow bar wheel being one of a pair of tow bar wheels connected to the pair of prongs at positions laterally opposite each other on laterally opposite sides of the pair of prongs.

7. The tow bar of claim 3, further comprising:

the tow bar wheel being one of a pair of tow bar wheels connected to the pair of prongs at positions laterally opposite each other on laterally opposite sides of the aircraft ski.

8. The tow bar of claim 7, further comprising:

a pair of arms, each arm being connected to a prong projecting laterally outwardly from the prong away from the snow ski, and the pair of tow bar wheels being connected to the pair of arms with the pair of arms positioning the pair of tow bar wheels on laterally opposite sides of the pair of prongs.

9. An aircraft tow bar that is adapted for attachment to an aircraft wheel with a snow ski attached to the landing gear associated with the aircraft wheel, the tow bar comprising:

a pair of prongs that are positioned relative to each other with a lateral spacing between the pair of prongs, the lateral spacing being dimensioned to receive the aircraft wheel in the lateral spacing between the pair of prongs with the snow ski attached to the aircraft wheel;

a plurality of longitudinally extending rods connected to the pair of prongs and extending from the pair of prongs to proximal ends of the rods adapted for attachment to a motive source for moving the rods and thereby moving the pair of prongs;

first and second pairs of connectors on the pair of prongs for enabling removable attachment of the prongs to the aircraft wheel when the snow ski is attached to the landing gear structure of the aircraft wheel, and when the snow ski is not attached to the landing gear structure; and

,

at least one tow bar wheel operably associated with one of the prongs for supporting the tow bar above a ground surface.

10. The tow bar of claim 9, further comprising:

the pair of tow bar wheels being positioned on laterally opposite sides of the snow ski when the connectors are attached to the aircraft wheel with the snow ski attached to the aircraft wheel.

11. The tow bar of claim 9, further comprising:

a pair of arms on the pair of prongs, the pair of arms extending laterally outwardly from each other and from the pair of prongs; and

,

the pair of tow bar wheels being on the pair of arms where the pair of arms position the pair of tow bar wheels at spaced positions laterally outside the pair of prongs.

12. The tow bar of claim 11, further comprising:

the pair of tow bar wheels and the pair of arms positioning the pair of prongs over the snow ski when the connectors are attached to the aircraft wheel with the snow ski attached to the aircraft wheel.

13. The tow bar of claim 12, further comprising:

the pair of tow bar wheels being caster mounted on the pair of arms.

14. The tow bar of claim 9, further comprising:

the connectors being positioned on the pair of prongs where the pair of prongs are positioned above the snow ski when the connectors are attached to the aircraft wheel.