Patent US3757900A successfully refreshed from Google Patents.
US3757900A
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Shock limiting and energy absorbing device
Assignee: Isotopes Inc
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Filing: 1971-10-22
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Granted: 1973-09-11
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Expires: 1991-10-22
Abstract
Abstract An improved shock limiting and energy absorbing device comprises two components arranged one inside the other. The components are prevented from freely slideably moving with respect to one another by the fact that the external diameter of the inner component is somewhat larger than the internal diameter of the outer component. Application of a force between the inner and outer components results in the inner component being moved through the outer component with the force and energy applied between the two components being absorbed and controlled by the plastic flow of the material tending to prevent the slideable movement.
Inventors
- 👤 G Gischlar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:04
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/12; F16F7/125
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
A shock limiting and energy absorbing device comprising: an outer component having an opening therein; and an inner component positioned through said opening and adapted to move relative to said outer component, in a predetermined direction and in response to the apPlication of an external force; wherein over at least a portion of said outer and inner components at least one dimension of said inner component is greater than the corresponding dimension of said opening in a plane transverse to said predetermined direction, and wherein at least one of said inner and outer components is capable of undergoing plastic flow, said apparatus further characterized in that the difference between the length of said at least one dimension of said outer component and the length of said corresponding dimension in said opening is varied in said predetermined direction so that the device absorbs energy and limits transmitted forces in a variable manner.
Claim 2
Dependent Claim
151 words
A shock limiting and energy absorbing device comprising: an outer component having an opening therein; and an inner component positioned through said opening and adapted to move relative to said outer component, in a predetermined direction and in response to the apPlication of an external force; wherein over at least a portion of said outer and inner components at least one dimension of said inner component is greater than the corresponding dimension of said opening in a plane transverse to said predetermined direction, and wherein at least one of said inner and outer components is capable of undergoing plastic flow, said apparatus further characterized in that the difference between the length of said at least one dimension of said outer component and the length of said corresponding dimension in said opening is varied in said predetermined direction so that the device absorbs energy and limits transmitted forces in a variable manner.
Claim 3
Dependent Claim
49 words
The shock limiting and energy absorbing device of claim 1 wherein the outer component is in the form of a tube and the inner component has a cross-section substantially corresponding to the cross section of the opening in the outer component in said plane transverse to said predetermined direction.
Claim 4
Dependent Claim
21 words
The shock limiting and energy absorbing device of claim 2 wherein the outer component only is adapted to undergo plastic flow.
Claim 5
Dependent Claim
56 words
The shock limiting and energy absorbing device of claim 3 wherein the external force acts on one side of the inner component and is tensile and wherein the cross-section of the opening in the outer component is smaller than the corresponding cross-section of the inner component at least on the same side of the inner component.
Claim 6
Dependent Claim
36 words
The device of claim 1 wherein the difference between the length of said at least one dimension of said outer component and the length of said corresponding dimension in said opening increases in said predetermined direction.
Claim 7
Dependent Claim
39 words
The device of claim 2 wherein the cross-sectional areas of the outer and inner components are varied in said predetermined direction so that the device absorbs energy and limits transmitted forces in accordance with a predetermined variable mathematical function.
Claim 8
Dependent Claim
28 words
The device of claim 6 wherein said device absorbs energy and limits transmitted force in accordance with a ramp, sine, exponential or discontinuous function or a combination thereof.
Claim 9
Dependent Claim
20 words
The device of claim 6 wherein said device absorbs energy and limits transmitted forces in accordance with a ramp function.
Claim 10
Dependent Claim
20 words
The device of claim 7 wherein said device absorbs energy and limits transmitted forces in accordance with a sine function.
Claim 11
Dependent Claim
20 words
The device of claim 7 wherein said device absorbs energy and limits transmitted forces in accordance with an exponential function.
Claim 12
Dependent Claim
20 words
The device of claim 7 wherein said device absorbs energy and limits transmitted forces in accordance with a step function.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |