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US 2022/0048434 A1Published application
Hitch step and method of manufacturing
OwnerRobert E. Klein, Steven L. Mixon +1inventors
InventorsRobert E. Klein, Steven L. Mixon, Justin C. Burris
Life of this patent
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Abstract
The present invention relates to a hitch step that may be secured to a vehicle in a hitch receiver, and a method of manufacturing the same, that overcomes the disadvantages of the prior art. The present invention provides a multi-step pressurization method that produces a strong, compact hitch step that is cost effect to manufacture.
Claims20
A method of manufacturing a hitch step, comprising:
- a first injection phase wherein a plunger moves forward at a first speed to push air out of a shot sleeve and to move past a pour hole in said shot sleeve;
- a second injection phase wherein said plunger moves forward at a second speed to fill a runner system with molten material, wherein said second speed is faster than said first speed;
- and
- a third injection phase wherein said plunger moves forward at a third speed to fill a part cavity with said molten material, wherein said third speed is faster than said second speed.
1 more element
A method of manufacturing a hitch step, comprising:
- a first injection step wherein a plunger moves at a first speed to push air out of a shot sleeve, to move past a pour hole in said shot sleeve and to move molten material toward a die;
- a second injection step wherein said plunger moves at a second speed to fill a runner system with said molten material, wherein said second speed is faster than said first speed;
- and
- a third injection step wherein said plunger moves at a third speed to fill a part cavity within said die with said molten material, wherein said third speed is faster than said second speed.
1 more element
A method of manufacturing a cast part, comprising:
- a first injection step wherein a plunger moves at a first speed to push air out of a shot sleeve, to move past a pour hole in said shot sleeve and to move molten material toward a die;
- a second injection step wherein said plunger moves at a second speed to fill a runner system with said molten material, wherein said second speed is faster than said first speed;
- and
- a third injection step wherein said plunger moves at a third speed to fill a part cavity within said die with said molten material, wherein said third speed is faster than said second speed.
1 more element
Dependencies are inferred from the claim text.