HYDRAULIC DRIVE SYSTEM

• US 20080083222A1
• Filed: 07/25/2007
• Published: 04/10/2008
• Est. Priority Date: 10/10/2006
• Status: Abandoned Application

• Current Assignee: Donald Hubert
• Original Assignee: Donald Hubert
• Inventors: Hubert, Donald
• Application Number:
  US11/782,637
• Publication Number:
  US 20080083222A1
• Time in Patent Office: Days
• US Class Current: 60/698
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: F16H 39/02 with liquid motors at a distance from liquid pumps
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A hydraulic drive system. In a first embodiment the hydraulic drive system comprises a hydraulic circuit, at least one battery, an electric motor and an alternator. The hydraulic circuit includes a hydraulic pump, a hydraulic motor, and a hydraulic fluid reservoir containing hydraulic fluid. In a second embodiment the hydraulic drive system also includes a combustion engine, a fuel tank, and an electrical generator. In another embodiment, the hydraulic drive system includes primary and secondary hydraulic circuits with the secondary hydraulic circuit featuring throttle functionality. In another embodiment the hydraulic drive system provides power generation to a building such as a family home or dwelling. In a further embodiment the hydraulic drive system is adapted to function as a building power generator system.

Claims

1. A hydraulic drive system, comprising:

a hydraulic circuit, comprising;

a hydraulic pump,

a hydraulic motor, and

a hydraulic fluid reservoir containing hydraulic fluid,

wherein said hydraulic pump is operably connected to drive said hydraulic motor;

a battery;

an electric motor; and

an alternator,

wherein said electric motor is operably connected to said hydraulic pump such that said electric motor drives said hydraulic pump,

wherein said hydraulic motor is operably connected to said alternator such that said hydraulic motor drives said alternator,

wherein said battery is operably connected to said alternator, and further wherein said battery is operably connected to said electric motor.

2. The hydraulic drive system according to claim 1 further comprising a combustion engine, a fuel tank, and an electricity generator, wherein said combustion engine drives said electricity generator, and said electricity generator is operably coupled to said battery for charging said battery.

3. The hydraulic drive system according to claim 1, wherein during normal operation said hydraulic motor is operably connected to a drive shaft.

4. The hydraulic drive system according to claim 1, wherein during normal operation said hydraulic motor is operably connected to a drive shaft, wherein said drive shaft is at least one drive shaft selected from a group consisting of:

a drive shaft operably connected to a vehicle'"'"'s drive wheels, a drive shaft operably connected to a boat propeller, a drive shaft operably connected to a rear wheel of a two-wheeled motorcycle, a drive shaft connected to a tractor'"'"'s rear wheels, a drive shaft connected to a trike'"'"'s rear wheels, and a drive shaft connected to a generator (360).

5. The hydraulic drive system according to claim 1, wherein during normal operation said hydraulic motor is operably connected to a drive shaft, and said drive system further comprises a controllable decoupler, wherein said controllable decoupler is used to control the amount of torque delivered by the hydraulic motor to the drive shaft such that as less torque is delivered to the drive shaft more power is available to drive said alternator.

6. A hydraulic drive system, comprising:

at least one hydraulic pump;

at least one hydraulic motor;

at least one hydraulic fluid reservoir containing hydraulic fluid, wherein said at least one hydraulic pump is operably connected to drive at least one hydraulic motor;

at least one battery;

at least one electric motor; and

at least one alternator,

wherein at least one electric motor is operably connected to drive at least one hydraulic pump,

wherein said at least one hydraulic motor is operably connected to drive at least one alternator,

wherein said at least one battery is operably connected to at least one alternator, and further wherein said at least one battery is operably connected to at least one electric motor.

7. The hydraulic drive system according to claim 6 further comprising a combustion engine, a fuel tank, and an electricity generator, wherein said combustion engine drives said electricity generator, and said electricity generator is operably coupled to said at least one battery for charging said at least one battery.

8. A hydraulic drive system, comprising:

a hydraulic fluid tank;

a battery;

an electric motor, which during normal operation receives power from said battery;

a main-hydraulic pump, which during normal operation is driven by said electric motor;

a primary hydraulic circuit, said primary hydraulic circuit comprises a primary-hydraulic motor operably connected to an alternator, said alternator is operably connected to said battery;

a secondary hydraulic circuit, said secondary hydraulic circuit comprises a secondary hydraulic fluid control valve, a secondary-hydraulic motor, and a bypass hydraulic line; and

a hydraulic-fluid-return-line,

wherein during normal operation said secondary hydraulic motor is coupled to a drive shaft,

wherein said main-hydraulic pump receives hydraulic fluid via an input-hydraulic-fluid-line from said hydraulic fluid tank, said main-hydraulic pump is operatively connected to a first output control valve and a second output control valve, said main-hydraulic pump pumps hydraulic fluid into said primary and secondary hydraulic circuits, wherein said first and second output control valves respectively control the rate of hydraulic fluid flow into said primary and secondary circuits,

wherein said primary hydraulic circuit and said secondary hydraulic circuit are located between said main-hydraulic pump and said hydraulic-fluid-return-line, wherein during normal operation said hydraulic-fluid-return-line returns hydraulic fluid from said primary and secondary hydraulic circuits to said hydraulic fluid tank, and

wherein said secondary hydraulic control valve functions as a throttle control by controlling the flow rate of hydraulic fluid to said secondary-hydraulic motor such that when the flow rate of hydraulic fluid to said secondary-hydraulic motor is restricted by said secondary hydraulic control valve said bypass hydraulic line acts as a bypass to shunt hydraulic fluid past said secondary-hydraulic motor to said hydraulic-fluid-return-line.

9. A hydraulic drive system adapted to function as a building power generator system, comprising:

a hydraulic circuit, said hydraulic circuit comprises a hydraulic motor, a hydraulic pump, and a hydraulic fluid reservoir; and

a power circuit, said power circuit comprises a battery setup, an alternator, an electric motor and an electricity generator,

wherein said electricity generator is operatively coupled to said hydraulic motor,

wherein said hydraulic motor is selectively used to drive said electricity generator,

wherein said electric motor is operatively coupled to said hydraulic pump, and

wherein said electric motor is selectively used to drive said hydraulic pump.

10. The hydraulic drive system adapted to function as a building power generator system according to claim 9, wherein said hydraulic pump is coupled to a pressure head, and wherein said hydraulic circuit further comprises a pressure control valve and a hydraulic fluid filter.

11. The hydraulic drive system adapted to function as a building power generator system according to claim 9, wherein said electricity generator is rated at about 50 kW.