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US 7,350,774 B2Granted
Long travel, high force combination spring
AssigneeDanly IEM, LLC
InventorsVictor L. Chun, Brian Lee Taylor, Alexander B. Leibman, Michael Hajjar
Life of this patent
Estimating the term…
Abstract
A long travel, varying spring rate combination spring includes two differing rate springs connected end-to-end in such a way that the lower rate spring is compressed until positive engagement of a plunger with an intermediate flange member occurs with the higher rate spring thereafter compressed. Each spring may be assembled separately and connected together with a coupling to create a combination spring, allowing various springs to be combined to meet the requirements of a particular application.
Claims6
A combination spring comprising:
- a first spring;
- a second spring having a different spring rate from said first spring;
- said first and second spring arranged end-to-end with an intermediate flange member engaging juxtaposed ends of said first and second springs;
- a plunger associated with said first spring and projecting within said first spring towards said intermediate flange member;
- said plunger having a pin therein extending through an opening at a first end of said plunger and through an opening in said intermediate flange member;
- said plunger first end having a larger cross-sectional dimension than said intermediate flange member so said plunger cannot travel past said intermediate flange member;
- said plunger having a predetermined travel distance and thereafter upon further movement can compress said second spring;
- a second end of said plunger configured to compress said first spring toward said intermediate flange member when a force is applied to said plunger;
- and
- wherein said pin has at least a first section and a second section, said first section having a diameter that prohibits said first section from passing through said intermediate flange member, and said second section having a diameter that allows said second section to pass through said first end of said plunger and through said intermediate flange.
7 more elements
Dependencies are inferred from the claim text.