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US 2025/0058685 A1Published application
Spring unit and method for changing a spring constant of a spring arrangement in a spring unit
OwnerCarl Magnus Ullmaninventor
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OwnerCarl Magnus Ullmaninventor
Estimating the term…
The disclosure relates to a spring unit and a method for changing a spring constant of a spring arrangement in a spring unit. The spring unit comprises a first attachment arrangement, a second attachment arrangement and a spring arrangement. The spring arrangement comprises a first flexible member attached to and extending between the first attachment arrangement and the second attachment arrangement. The first attachment arrangement is fixedly attached to a support structure and the second attachment arrangement is arranged to move a first distance essentially vertically in response to a load being exerted on the second attachment arrangement. The spring arrangement comprises a first engagement element arranged to cause a change in a spring constant of the first flexible member, such that the spring constant of the first flexible member increases after the second attachment arrangement has moved a part of the first distance.
Spring unit (1), wherein the spring unit (1) comprises a first attachment arrangement (2), a second attachment arrangement (3) and a spring arrangement (4), wherein the spring arrangement (4) comprises a first flexible member (5) attached to and extending between the first attachment arrangement (2) and the second attachment arrangement (3), wherein the first attachment arrangement (2) is fixedly attached to a support structure (6) and wherein the second attachment arrangement (3) is arranged to move a first distance (L_1) essentially vertically in response to a load being exerted on the second attachment arrangement (3), characterized in that the spring arrangement (4) further comprises a first engagement element (7) arranged to cause a change in a spring constant of the first flexible member (5), such that when the second attachment arrangement (3) has moved a part of the first distance (L_1), the first flexible member (5) comes into contact with the first engagement element (7), leading to that the spring constant of the first flexible member (5) increases.
Spring unit (1) according to any one of the preceding claims, wherein the spring arrangement (4) further comprises a second flexible member (9) attached to and extending between the first attachment arrangement (2) and the second attachment arrangement (3), wherein attachment points of the second flexible member (9) to the first and second attachment arrangements (2, 3) are arranged at a third distance essentially vertically below or above attachment points of the first flexible member (5) to the first and second attachment arrangements (2, 3).
Spring unit (1) according to any one of the preceding claims, wherein the first flexible member (5) and the second flexible member (9) are rectangular or quadratic plates or beams and are made of metal, composite, fibre-reinforced composite or a polymer or a combination of such materials.
Seat arrangement, wherein the seat arrangement comprises a spring unit (1) according to any one of the preceding claims.
Method for changing a spring constant of a spring arrangement (4) in a spring unit (1), wherein the spring unit (1) comprises a first attachment arrangement (2) and a second attachment arrangement (3), wherein a first flexible member (5) is attached to and extending between the first attachment arrangement (2) and the second attachment arrangement (3), characterized in that the method comprises:
Dependencies are inferred from the claim text.