Fuel system for a vibratory rammer

Abstract

A fuel system (1) for a vibratory rammer (2) includes a tank arrangement (3), a diaphragm carburetor (4), a fuel line arrangement (5) and a venting line arrangement (6) for complementary venting of air from the fuel system (1) to the atmosphere. The fuel system (1) also includes a venting valve (7) which is open and closeable to the atmosphere. The tank arrangement (3) includes a primary fuel tank (8) and a secondary fuel tank (11).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described with reference to the drawings wherein:

FIG. 1 is a side elevation view of a fuel system according to the invention arranged on a vibratory rammer;

FIG. 2 is a schematic of a first embodiment of the fuel system of the invention;

FIG. 3 is a schematic of a venting valve of the fuel system;

FIG. 4 is a perspective view of a secondary fuel tank;

FIG. 5 is a schematic of a second embodiment of the fuel system of the invention; and, FIG. 6 is a schematic of a third embodiment of the fuel system of the invention.

Claims

1. A fuel system for a vibratory rammer, the fuel system comprising: a primary fuel tank for holding fuel for said fuel system;a secondary fuel tank;a primary fuel line for supplying fuel from said primary fuel tank to said secondary fuel tank;a diaphragm carburetor;a secondary fuel line for supplying fuel from said secondary fuel tank to said diaphragm carburetor;a venting valve switchable between a first position wherein said venting valve is closed to the atmosphere and a second position wherein said venting valve is open to the atmosphere; and,a venting line for venting air from said secondary fuel tank to the atmosphere via said venting valve.

2. The fuel system of claim 1, wherein said venting valve is actuated in said second position and non-actuated when in said first position.

3. The fuel system of claim 2, wherein said venting valve includes means for delaying the closing of said venting valve following actuation thereof.

4. The fuel system of claim 1, wherein said venting valve includes a chamber and said venting line is connected to said chamber.

5. The fuel system of claim 4, wherein said venting line is a secondary venting line and said system further comprises a primary venting line connecting said primary fuel line to said chamber for venting air from said primary fuel line to the atmosphere via said chamber.

6. The fuel system of claim 1, wherein said venting line is a secondary venting line and said system further comprises a primary venting line; said venting valve comprises two chambers; said secondary venting line is connected to one of said chambers; and, said primary venting line is connected between said primary fuel line and the other one of said chambers for venting air from said primary fuel line to the atmosphere via said venting valve.

7. The fuel system of claim 1, wherein said venting valve includes a filter.

8. The fuel system of claim 1, wherein said primary fuel tank includes a tank venting valve and wherein said fuel system further comprises a fuel valve connected to said primary fuel line; and, means for coordinating the opening of said tank venting valve with said fuel valve so as to permit said tank venting valve to open partially or fully before said fuel valve opens.