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US 2025/0128368 A1Published application
Inside out spring plunger
AssigneeStandard Lifters, Inc.
InventorsScott M. Breen, Joel T. Pyper
Life of this patent
Estimating the term…
Abstract
A spring plunger assembly can be used in manufacturing, machines, fixtures, etc. The spring plunger assembly has a spring that is located on the exterior of the plunger body. The spring plunger assembly includes a threaded section for engaging a threaded aperture.
Claims20
A metal forming die having at least two mutually converging die members between which a stock strip is shifted to form parts from the stock strip, the improvement of a spring plunger assembly, comprising:
- a plunger body with an outer end portion oriented toward the stock strip, an inner portion oriented away from the stock strip, and a medial portion between the outer end portion and the inner end portion;
- wherein:
- said outer end portion has a first width, said medial portion has a second width that is smaller than said first width forming a first shoulder therebetween;
- said inner end portion has a third width that is smaller than said second width forming a second shoulder therebetween;
- said inner end portion including a hexagonal exterior surface;
- a retainer body having an outer end portion oriented toward the stock strip, an inner end portion oriented away from the stock strip, a threaded exterior surface, and a hexagonal opening in said outer end portion;
- a spring member with an outer end portion oriented toward the stock strip, an inner end portion oriented away from the stock strip;
- wherein said outer end portion of said spring member contacts said first shoulder of said plunger body, and said inner end portion of said spring member contacts said outer end portion of said retainer body;
- and
- wherein said hexagonal exterior surface of said inner end portion of said plunger body is received in said hexagonal opening in said outer end portion of said retainer body.
7 more elements
A spring plunger assembly, comprising:
- a plunger body with an outer end portion, an inner end portion, and a medial portion between said outer end portion and said inner end portion;
- wherein said outer end portion has a first width;
- wherein said medial portion has a second width that is smaller than said first width forming a first shoulder therebetween;
- wherein said inner end portion has third width that is smaller than said second width forming a second shoulder therebetween;
- wherein said inner end portion includes a hexagonal exterior surface and a flared section;
- wherein said outer end portion as a hexagonal opening;
- a retainer body having an outer end portion, an inner end portion, and a threaded section on the exterior surface;
- wherein said outer end portion has a hexagonal opening;
- wherein said inner end portion has an opening with a narrowed section that contacts said flared section of said inner end portion of said plunger body;
- and
- a spring member with an outer end that contacts said first shoulder of said plunger body and an inner end that contacts the outer end portion of said retainer body.
8 more elements
A method for making a metal forming die having at least one die member with the improvement of at least one spring plunger assembly, comprising:
- forming a plunger body with an outer end portion, an inner end portion, and a medial portion between said outer end portion on said inner end portion, including:
- forming a first shoulder between said outer end portion and said medial portion;
- forming a second shoulder between said inner end portion and said medial portion;
- forming a hexagonal surface on portions of said inner end portion;
- forming a retainer body with an outer end portion with a hexagonal opening, an inner end portion with a opening having a narrowed section, and a threaded section on the exterior surface;
- inserting a spring member over said medial portion and said inner end portion of said plunger body such that a first end of said spring member contacts said first shoulder;
- placing said hexagonal surface of said plunger body into said hexagonal opening in said retainer body;
- deforming the end of said inner end portion of said plunger body;
- forming an aperture in said die member, said aperture having a threaded section;
- and
- coupling the threaded section of said retainer body to the threaded section of said aperture in said die member.
8 more elements
Dependencies are inferred from the claim text.