Generator system with vertically shafted engine

• US 6,181,019 B1
• Filed: 05/09/2000
• Issued: 01/30/2001
• Est. Priority Date: 08/13/1998
• Status: Expired due to Fees

• Current Assignee: Powermate Corporation (Pramac America LLC)
• Original Assignee: Coleman Company Incorporated (Newell Brands Inc.)
• Inventors: Frank, Kenneth M.
• Primary Examiner(s): Ponomarenko, Nicholas
• Application Number:
  US09/566,960
• Time in Patent Office: 266 Days
• Field of Search: 290/1.A, 290/1.B, 290/2, 290/40.R, 290/46, 322/1, 123/2, 123/3
• US Class Current: 290/1.00A
• CPC Class Codes: F02B 2063/045 Frames for generator-engine sets
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: F02B 63/047 Movable engine-generator combinations on wheels
• CPC Class Codes: F02B 75/007 having vertical crankshafts
• CPC Class Codes: F02B 75/16 Engines characterised by number of cylinders, e.g. single-cylinder engines F02B75/26 takes precedence
• CPC Class Codes: H02J 9/066 characterised by the use of dynamo-electric machines H02J9/08 takes precedence
• CPC Class Codes: H02K 7/1815 structurally associated with reciprocating piston engines general aspects of generating sets, e.g. housing, F02B63/04

Abstract

A portable generator system includes an interface mounting element for supporting a selected engine, from a plurality of engines, with a vertically oriented output shaft when the generator system is positioned on a substantially horizontal surface. A generator is directly coupled to the output shaft of the engine and rotates therewith about a common axis. The generator is selectable from a plurality of generators having different output power characteristics. A movable support cart supports interface, engine and generator and is formed of a single piece of tubular stock. The tubular stock is bent to form two substantially parallel, displaced, U-shaped regions bounded by a third U-shaped region substantially perpendicular thereto wherein the interface element, the selected engine and the selected generator are supported and protected. The cart supports first and second displaced wheels which rotate about a common axis which extends between the first and second regions, parallel to the third region. A fuel tank is carried on the cart and extends from the first side of the axis while the interface extends from the second side enabling the fuel tank to counterbalance the weight of the selected engine, the selected generator and the interface about the axis of rotation of the wheels.

Claims

1. A generator system positionable on a supporting surface comprising:

an engine with a rotary output shaft intended to be oriented substantially perpendicular to the supporting surface in normal operation;

wherein the engine has a mounting surface;

a source of electrical energy having a rotor and a stator wherein the rotor is adapted to be coupled, for rotation, to the output shaft along a common rotational center line;

a two part interface structure, positioned between the engine and the source, wherein one part mechanically receives the other, wherein one part carries an alignment element for the stator which is coupled thereto and wherein the other carries a surface, machined relative to the alignment element, whereby the machined surface aligns the shaft of the engine, relative to the stator and the common center line when the engine is coupled to the interface structure.

2. A system as in claim 1 which includes at least one wheel rotatably coupled thereto for movement thereof wherein the wheel rotates about a selected axis.

3. A system as in claim 2 which includes an elongated fuel tank oriented such that an elongated dimension thereof extends generally parallel to the output shaft.

4. A system as in claim 3 wherein the fuel tank and the engine are located on opposite sides of the selected axis whereby at least the fuel tank counterbalances the engine as the engine is being moved.

5. A system as in claim 1 which includes output terminals coupled to the source, wherein the terminals are adapted to removably engage electrical cables and a cable retainer carried on the system for engaging portions of at least one of the cables to prevent unintended disengagement of the at least one cable when engaged with a respective terminal.

6. A system as in claim 5 wherein the cable retainer comprises a cable retaining, elongated member formed at least in part, with a cable receiving and retaining loop.

7. A system as in claim 5 wherein the retainer comprises a length of wire.

8. A system as in claim 5 wherein the retainer comprises a length of plastic.

9. A system as in claim 1 which includes:

a speed control coupled to the engine for causing the engine to rotate the shaft with a substantially constant speed over a range of energy delivered from the source; and

a sensor of delivered energy and a control element for disabling operation of the speed control during intervals of energy delivery below a preset threshold whereupon the engine enters a predetermined quiescent state outside of its normal operating range.

10. A system as in claim 9 wherein the speed control includes a pivoted engine fuel control lever.

11. A system as in claim 10 wherein the control element includes a coil wherein the coil is energized during the intervals of energy delivery below the threshold thereupon causing the lever to move to a speed control disabling position.

12. A system as in claim 11 wherein the coil is symmetrical about an axis, and wherein the axis is substantially perpendicular to the control lever.

13. A system as in claim 12 wherein the axis of the coil is substantially perpendicular to the output shaft.

14. A system as in claim 9 wherein the energy delivered sensor receives power generated by rotation of the shaft.

15. A system as in claim 3 which includes a supporting frame formed of a tubular member wherein the member is bent to have a plurality of continuous curves wherein the frame has first and second, spaced apart, U-shaped sections which extend on each side of the engine and are joined by a third, inverted, generally U-shaped section, having two non-parallel sides wherein the three sections are integrally formed in the tubular member and, enclose and support the engine on three sides.

16. A system as in claim 15 wherein the fuel tank extends between the first and second U-shaped sections spaced from the third section thereby forming a bounded, engine containing region.

17. A system as in claim 16 wherein the frame carries a plurality of shock mounts for supporting the engine.

18. A system as in claim 17 which includes a planar support member, sandwiched between the engine mounting surface and the interface wherein the planar member is coupled to the shock mounts.

19. A system as in claim 18 which includes first and second planar perforated panels, coupled to respective ones of the first and second U-shaped sections whereby the panels extend between the planar support member and portions of the first and second U-shaped sections.

20. A system as in claim 19 wherein one of the panels carries a plurality of energy output terminals.

21. A system as in claim 19 wherein one of the panels carries a rechargeable battery.