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US 8,408,882 B2Granted
Pressure washer pump and engine system
AssigneeBriggs & Stratton Corporation
InventorsDaniel L. Klika, David A. Kratz
Life of this patent
Estimating the term…
Abstract
A pressure washer system includes an internal combustion engine and a water pump. The internal combustion engine includes an engine block forming a chamber and a cover for the chamber. The cover has an area designed to hold a lubricant. Additionally, the engine includes a crankshaft within the chamber. The water pump includes a pumping mechanism, an inlet, an outlet, and a fluid passage. The pumping mechanism is powered by the crankshaft. Water enters the pump through the inlet and exits the pump through the outlet. The fluid passage extends between the inlet and the outlet. A portion of the fluid passage is formed in the cover of the engine. Heat transfers from the lubricant of the engine to the water of the water pump during operation of the pressure washer system.
Claims36
A pump and engine system, comprising:
- an internal combustion engine, comprising:
- an engine block forming a chamber therein,
- a cover for the chamber, the cover comprising an area configured to hold a lubricant, a first surface contacting the lubricant and a second opposite surface, and
- a crankshaft within the chamber;
- and
- a water pump mounted to the second surface of the cover, the water pump comprising:
- a pumping mechanism powered by the crankshaft,
- an inlet through which water enters the water pump,
- an outlet through which water exits the water pump, and
- a fluid passage between the inlet and the outlet;
- wherein a portion of the fluid passage is formed in the cover adjacent to the first surface, the portion of the fluid passage for delivering fluid to the pump, whereby heat transfers from the lubricant to the water in the portion of the fluid passage during operation of the pump and engine system.
8 more elements
A pump and engine system, comprising:
- an internal combustion engine, comprising:
- an engine block forming a chamber,
- a cover for the chamber, the cover comprising an area configured to hold a lubricant, a first surface contacting the lubricant and a second opposite surface, and
- a crankshaft within the chamber;
- and
- a water pump, comprising:
- a pump housing mounted to the second surface of the cover;
- a pumping mechanism positioned within the pump housing and powered by the crankshaft,
- an inlet through which water enters the water pump,
- a first conduit extending between the inlet and the pumping mechanism,
- an outlet through which water exits the water pump, and
- a second conduit extending between the pumping mechanism and the outlet;
- wherein the first conduit of the water pump is formed in the cover adjacent to the first surface such that heat transfers from the lubricant to the water in the first conduit during operation of the pump and engine system.
10 more elements
A pressure washer system, comprising:
- an engine having a crankcase and a cover for the crankcase, wherein the cover is configured to hold a pool of oil for lubricating the engine and the cover includes a first surface contacting the lubricant and a second opposite surface;
- a water pump powered by the engine, the water pump having a pump housing mounted to the second surface of the cover, a pumping mechanism positioned within the pump housing, an inlet, an outlet, and at least one fluid passage between the inlet and the outlet;
- and
- a spray gun configured to be coupled to the outlet via a hose,
- wherein a portion of the at least one fluid passage of the water pump is integrally formed with and extends through the cover of the engine adjacent to the first surface to deliver fluid to the water pump, and
- wherein heat transfers from the lubricant to the water in the portion of the at least one fluid passage during operation of the pressure washer system.
3 more elements
A pump and engine system, comprising:
- an internal combustion engine having a cover in which a sump configured to hold lubricant therein is formed in a first surface of the cover and the cover also has a second opposite surface;
- and
- a water pump mounted to the second surface of the cover, the water pump comprising:
- a pumping mechanism powered by the engine,
- an inlet conduit configured to direct water into the pumping mechanism, the inlet conduit formed in the cover adjacent to the first surface, and
- an outlet conduit configured to direct water away from the pumping mechanism,
- wherein the sump of the engine and the inlet conduit of the water pump are integrally formed in the cover such that heat transfers from the lubricant to the water in the inlet conduit during operation of the pump and engine system.
4 more elements
A pressure washer, comprising:
- an engine including a crankcase, a cover including a first surface at least partially defining a sump containing lubricant, the cover also include a second opposite surface, and a crankshaft extending within the crankcase and through the cover;
- a water pump including a pump housing coupled to mounted to the second surface of the cover, a pumping mechanism for pumping water contained within the pump housing, a fluid passage fluidly coupled to the pumping mechanism to provide water to the pumping mechanism and an outlet through which water exits the water pump;
- and
- a spray gun fluidly coupled to the outlet;
- wherein the fluid passage is at least partially formed in the cover adjacent the first surface and proximate the sump such that heat from the lubricant is transferred to the water in the fluid passage adjacent the first surface to cool the lubricant such that the water is both a working fluid and a coolant of the pressure washer.
2 more elements
Dependencies are inferred from the claim text.