Hand-operated oil pump

1. A hand-operated oil pump, comprising: a pump assembly, comprising: a cylinder, comprising: a cylinder interior; a cylinder first end; a cylinder second end; a cap having a shaft aperture secured to said cylinder first end; a cylinder port disposed within said cylinder second end; a first check valve disposed adjacent said cylinder second end; a second check valve disposed subjacent said cylinder port; a shaft movably disposed within said shaft aperture, comprising: a handle secured to a shaft first end and residing outside said cylinder; and a piston secured to a shaft second end and moveable within said cylinder interior; an adapter, comprising: an adapter interior; an adapter first end secured to said cylinder second end subjacent said first check valve and over said second check valve; an adapter second end opposite said adapter first end; and an adapter outlet disposed within said adapter second end and in environmental communication with said adapter interior; a down stop disposed upon an interior wall of said cylinder adjacent said first check valve, wherein said first check valve comprises a first check valve port and a flapper moveably disposed adjacent said down stop and adjacent said first valve port, wherein when said handle is actuated in a first direction, said flapper is moved away from said first check valve port thereby opening said first check valve port and wherein when said handle is actuated in a second direction, said flapper is moved against an interior side of said first check valve port thereby closing said first check valve port; and a spring secured at a spring first end to an interior wall of said second check valve housing opposite said cylinder port; a ball secured to a spring second end adjacent said cylinder port and capable of mechanical communication with said cylinder port; wherein when said handle is actuated in said first direction, said ball is moved over said cylinder port thereby closing said cylinder port; wherein when said handle is actuated in said second direction, said ball is moved away from said cylinder port thereby opening said cylinder port; wherein said cylinder interior and said adapter interior are in environmental communication through said second check valve; wherein when said handle is actuated in said first direction, said piston is actuated in said first direction thereby generating a first force capable of drawing a gas in fluid communication with said first check valve into said cylinder interior; wherein when said handle is actuated in said second direction, said ball is moved away from said cylinder port thereby opening said cylinder port; wherein said adapter comprises an adapter upper section at said adapter first end, a second gasket radially disposed subjacent said adapter upper section, and a nozzle at said adapter second end; wherein said second check valve comprises a second check valve housing defining a second check valve interior in environmental communication with said cylinder port, a second check valve first port disposed within said second check valve housing and in environmental communication with said second check valve interior and said adapter interior, a second check valve second port disposed within said second check valve housing, opposite said second check valve first port and in environmental communication with said second check valve housing and said adapter interior; wherein said cap and said cylinder are integrally molded; and wherein said cap and said cylinder are integrally molded.

2. The hand-operated oil pump of claim 1 , wherein said nozzle is conical to permit insertion of said nozzle into an oil fill port of an engine.

3. The hand-operated oil pump of claim 1 , wherein said adapter comprises rubber.

4. A hand-operated oil pump, comprising:

a pump assembly, comprising:

a cylinder, comprising:

a cylinder interior;

a cylinder first end;

a cylinder second end;

a cap having a shaft aperture secured to said cylinder first end;

a cylinder port disposed within said cylinder second end;

a first check valve disposed adjacent said cylinder second end;

a second check valve disposed subjacent said cylinder port;

a shaft movably disposed within said shaft aperture comprising:

a handle removably secured to a shaft first end and residing outside said cylinder; and

a piston secured to a shaft second end and moveable within said cylinder interior;

an adapter, comprising:

an adapter interior;

an adapter first end secured to said cylinder second end subjacent said first check valve and over said second check valve;

an adapter second end opposite said adapter first end;

an adapter outlet disposed within said adapter second end and in environmental communication with said adapter interior;

a down stop disposed upon an interior wall of said cylinder adjacent said first check valve;

wherein said cylinder interior and said adapter interior are in environmental communication through said second check valve;

wherein when said handle is actuated in a first direction, said piston is actuated in said first direction thereby generating a first force capable of drawing a gas in fluid communication with said first check valve into said cylinder interior;

wherein when said handle is actuated in a second direction said piston is actuated in said second direction thereby generating a second force capable of expelling said gas through said second check valve;

wherein said first check valve comprises a first check valve port and a flapper moveably disposed adjacent said down stop and adjacent said first check valve port;

wherein when said handle is actuated in said first direction, said flapper is moved away from said first check valve port thereby opening said first check valve port; and

wherein when said handle is actuated in said second direction, said flapper is moved against an interior side of said first check valve port thereby closing said first check valve port;

wherein said second check valve comprises a second check valve housing defining a second check valve interior in environmental communication with said cylinder port;

a second check valve first port disposed within said second check valve housing and in environmental communication with said second check valve interior and said adapter interior;

a second check valve second port disposed within said second check valve housing, opposite said second check valve first port and in environmental communication with said second check valve housing and said adapter interior;

a spring secured at a spring first end to an interior wall of said second check valve housing opposite said cylinder port; and

a ball secured to a spring second end adjacent said cylinder port and capable of mechanical communication with said cylinder port;

wherein when said handle is actuated in said first direction, said ball is moved over said cylinder port thereby closing said cylinder port;

wherein when said handle is actuated in said second direction, said ball is moved away from said cylinder port thereby opening said cylinder port;

wherein said piston further comprises a first gasket centrally and radially disposed thereabout;

wherein said cap and said cylinder are integrally molded; and

wherein said cap and said cylinder are integrally molded.

5. The hand-operated oil pump of claim 4 , wherein said nozzle is conical to permit insertion of said nozzle into an oil fill port of an engine.

6. The hand-operated oil pump of claim 4 , wherein said adapter comprises rubber.