Rollover protection system for vehicles

• US 4,949,991 A
• Filed: 07/26/1989
• Issued: 08/21/1990
• Est. Priority Date: 08/03/1988
• Status: Expired due to Term

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Ludwig, Dieter
• Primary Examiner(s): Rice, Kenneth R.
• Application Number:
  US07/385,757
• Time in Patent Office: 391 Days
• Field of Search: 280/756, 296/188
• US Class Current: 280/756
• CPC Class Codes: B60R 21/131 Protective devices for drivers in case of overturning of tractors means for preventing overturning or tipping of tractors B62D49/08

Abstract

A foldable rollover protection system, or ROPS, is equipped with a lever to assist in raising and lowering the ROPS, without the necessity of the operator leaving the vehicle seat. The lever is slidably mounted in a guide on the upper, folding, part of the ROPS to allow it to slide out of the way when not in use. Appropriate holes are provided in the pivot bracket into which a pin can be inserted to lock the ROPS in its raised or lowered positions. A spring clip is provided which can hold the pin in place in either set of holes.

Claims

1. A rollover protection system for a vehicle having an operator station, comprising:

a. a pair of posts mounted to and directed generally upwards from the vehicle;

b. upper frame means pivotally mounted to the upper ends of said posts and pivotably between and raised and lowered positions; and

c. a lever mounted to said upper frame means, said lever being positioned to allow an operator in said operator station to manually move said upper frame means back and forth between said raised and lowered position.

2. The rollover protection system of claim 1, further comprising a guide mounted to said upper frame means, said lever being slidably positioned in said guide.

3. The rollover protection system of claim 2, wherein said lever is provided with at least one stop to prevent said lever from sliding out of said guide.

4. The rollover protection system of claim 3, wherein said lever is provided with a handgrip at one end thereof.

6. The rollover protection system of claim 3, wherein said guide is substantially perpendicular to the pivot axis between said upper frame and said posts.

7. The rollover protection system of claim 1, further comprising holding means for holding the upper frame in either of said raised and lowered positions.

8. The rollover protection system of claim 7, wherein said upper frame means is provided with two recesses, one adjacent the upper end of each said post, each said post is provided with a corresponding bracket for engagement with said recesses, and said bracket and said upper frame means have corresponding cross holes formed therein through which a retaining pin can be inserted to hold said upper frame means in said raised position, said recesses, brackets, holes and pin forming part of said holding means.

9. The rollover system of claim 7, wherein said upper frame means and at least one post each are provided with at least one bracket, said brackets having corresponding holes formed therein through which a retaining pin can be inserted to hold said upper frame means in said lowered position, said brackets, holes and pin forming part of said holding means.

10. The rollover system of claim 7, wherein said holding means includes a retaining pin engagable to hold said upper frame means in either of said raised and lowered positions, said retaining pin being provided with a loop-shaped handgrip at one end thereof.

11. The rollover system of claim 10, wherein said retaining pin further comprises a cross bar near said handgrip, and wherein the upper frame is provided with a retaining spring selectively engageable with said cross bar to hold said retaining pin.

5. The rollover protection system of claim 5, wherein said lever is provided with a disk-shaped shield near said handgrip, but closer to said guide than said handgrip.