Energy absorption element

• US 4,123,948 A
• Filed: 03/31/1977
• Issued: 11/07/1978
• Est. Priority Date: 04/01/1976
• Status: Expired due to Term

• Current Assignee: Firma Petri AG
• Original Assignee: Firma Petri AG
• Inventors: Zeller, Gregor
• Primary Examiner(s): Croyle, Carlton R.
• Assistant Examiner(s): Koczo, Jr., Michael
• Application Number:
  US05/783,286
• Time in Patent Office: 586 Days
• Field of Search: 74/492, 74/493, 74/552, 188/1 C
• US Class Current: 74/492
• CPC Class Codes: B62D 1/11 incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible padded linings associated with the steering wheel B60R21/05; shock absorbers using plastic deformation of members in general F16F7/12
• CPC Class Codes: F16F 7/123 Deformation involving a bending action, e.g. strap moving through multiple rollers, folding of members F16F7/125, F16F7/128 take precedence
• CPC Class Codes: Y10T 74/20834 Hand wheels

Abstract

Disclosed is an energy absorption element adapted for connecting a vehicular steering wheel to a steering wheel shaft, comprising a generally tubular body comprised of a plurality of support members extending axially between the steering wheel and the steering wheel shaft, and means incorporated in the support members for producing a radially outward collapse of said support members in response to an impact upon the steering wheel. Preferably each support member comprises an X-shaped configuration having an outward bend located in the area of intersection of the legs of the X-shaped configuration.

Claims

1. An energy absorption element adapted for connecting a vehicular steering wheel to a steering wheel shaft spaced apart axially from the steering wheel, said element comprising:

a generally tubular body comprised of a plurality of support members extending axially for placement between the steering wheel and the steering wheel shaft; and

means comprising a radially outward bend in each of said support members for producing a radially outward collapse of said support members in response to an impact upon the steering wheel, each of said support members comprising a single X-shaped configuration with said radially outward bend being located in the area of intersection of the legs of the X-shaped configuration.

2. The energy absorption element as defined by claim 1, wherein all of said support members comprise an integral piece formed into a tubular configuration.

3. The energy absorption element as defined by claim 2, wherein said integral piece if formed by stamping from the wall of a tubular piece of metal.

4. The energy absorption element as defined by claim 1, wherein all of said support members are individually formed and said element further includes means for fastening said support members together at their ends.

5. The energy absorption element as defined by claim 1, further comprising means, including a flange connecting the top ends of said support members, for connecting said element to the steering wheel.

6. The energy absorption element as defined by claim 1, further comprising means, including a disc connected to the bottom ends of said support members and a hub fastened at the center of said disc, for connecting said element to the steering wheel shaft.

7. The energy absorption element as defined by claim 1, further comprising a generally tubular casing surrounding said element, said casing being yieldable in response to collapse of said support members.

8. The energy absorption element as defined by claim 7, wherein said casing comprises a pair of truncated plastic cones abutting each other at their respective bases.

9. The energy absorption element as defined by claim 1, wherein said tubular body comprises three of said support members.

10. A steering wheel assembly, comprising:

(a) a steering wheel;

(b) a steering wheel shaft spaced apart axially from said steering wheel; and

(c) an energy absorption element connecting said steering wheel to said shaft, said energy absorption element comprising

a generally tubular body comprised of a plurality of support members extending axially for placement betweeen the steering wheel and the steering wheel shaft; and

means comprising a radially outward bend in each of said support members for producing a radially outward collapse of said support members in response to an impact upon the steering wheel, each of said support members comprising a single X-shaped configuration with said radially outward bend being located in the area of intersection of the legs of the X-shaped configuration.