Trailer

1. A trailer including:

(i) a trailer frame having a front end and a rear end supported by ground engaging wheels;

(ii) a pivot frame pivotally attached to the trailer frame by pivot attachment means wherein the pivot frame is adapted to be attached to a maintenance apparatus in use;

(iii) connection means to a prime mover; and

(iv) fluid actuated means between the pivot frame and the trailer frame, wherein an upper end of the fluid actuated means is pivotally attached to the pivot frame at a location above the pivot frame, and wherein a lower end of the fluid actuated means is pivotally attached to the trailer frame intermediate the front end and rear end.

2. A trailer as claimed in claim 1 wherein the trailer frame is U-shaped.

3. A trailer as claimed in claim 1 wherein the pivot frame is U-shaped.

4. A trailer as claimed in claim 1 wherein the pivot attachment means comprises a pair of pivot joints in opposed relationship.

5. A trailer as claimed in claim 1 wherein the connection means comprises a drawbar interconnecting the trailer frame and the prime mover in use.

6. A trailer as claimed in claim 1 wherein the pivot frame overlies the trailer frame in transportation mode and is in abutment with the trailer frame.

7. A trailer as claimed in claim 6 wherein in a loading mode the pivot frame is pivotable upwardly relative to the trailer frame which is stationary to facilitate attachment to the maintenance apparatus.

8. A trailer as claimed in claim 1 wherein there is provided an upright support rod between the pivot frame and the upper end of the fluid actuated means.

9. A trailer as claimed in claim 1 wherein there is provided a support plate between the trailer frame and the lower end of the fluid actuated means whereby said lower end is located above the trailer frame.

10. A trailer as claimed in claim 1 wherein in a non-operational position the pivot frame overlies the trailer frame and the fluid actuated means is oriented obliquely to both the pivot frame and the trailer frame and inclined towards the rear end of the trailer frame so as to form an acute included angle between the fluid actuated means and a horizontal plane farmed by the trailer frame.

11. A trailer including:

(i) a trailer frame having a front end and a rear end supported by ground engaging wheels;

(ii) a pivot frame pivotally attached to the trailer frame by pivot attachment means wherein the pivot frame is adapted to be attached to a maintenance apparatus in use;

(iii) connection means to a prime mover; and

(iv) fluid actuated means between the pivot frame and the trailer frame, wherein an upper end of the fluid actuated means is pivotally attached to an upright support and attached to the pivot frame so that the upper end is located above the pivot frame, wherein another end of the fluid actuated means is pivotally attached to the trailer frame intermediate the front end and rear ends, and wherein in a non-operational position the pivot frame overlies the trailer frame and the fluid actuated means is oriented obliquely to both the pivot frame and the trailer frame and inclined towards the rear end of the trailer frame so as to form an acute included angle between the fluid actuated means and a plane formed by the trailer frame.

12. A trailer-maintenance apparatus combination including:

(i) a trailer frame supported by ground engaging wheels;

(ii) a pivot frame pivotally attached to the trailer frame by pivot attachment means;

(iii) a maintenance apparatus supported by said pivot frame;

(iv) attachment means between the maintenance apparatus and the pivot frame which comprises a pair of opposed rigid couplings in the form of a pair of sockets, channels or notches on the pivot frame which are engaged with corresponding projections on the maintenance apparatus comprising outwardly extending axle ends or stub axles of a drive roller or wheel axle of the maintenance apparatus so that upon pivotal movement of the pivot frame relative to the trailer frame the maintenance apparatus is elevated clear of the ground with a substantial part of the maintenance apparatus clear of the pivot frame.

13. A trailer-maintenance apparatus combination including:

(i) a trailer supported by ground engaging wheels;

(ii) a maintenance apparatus supported by said trailer;

(iii) attachment means between the maintenance apparatus and the trailer which comprises a pair of opposed rigid couplings in the form of a pair of sockets, channels or notches on the trailer which are engaged with corresponding projections on the maintenance apparatus, said projections comprising outwardly extending axle ends or stub axles of a drive roller or wheel axle of the maintenance apparatus so that upon pivotal movement of the trailer the maintenance apparatus is elevated clear of the ground.