US3711080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy absorption apparatus
Assignee: Menasco Inc
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Filing: 1971-07-19
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Granted: 1973-01-16
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Expires: 1991-07-19
Abstract
Abstract An energy absorption apparatus including a piston being movably mounted within a cylinder, a sleeve forming the interior wall of the cylinder and being in contact with the piston, the sleeve having formed therein a plurality of longitudinal slots, a compressible solid material located within the cylinder and capable of passing from one side of the piston to the other side through the slots.
Inventors
- 👤 G Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:02
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R19/32; F; F16; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/346
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
An energy absorption apparatus comprising: a piston connected to a piston rod; a cylinder, said piston being longitudinally movable within said cylinder adjacent the inner wall thereof; a compressible solid material located within said cylinder and pressurized to normally position said piston at one end of said cylinder in retracted position; said piston rod moving into said cylinder as said piston moves towards its extended position; and passage means in said inner wall of said cylinder to permit said material to move from one side of said piston to the other side upon movement of said piston within said cylinder, the flow area of said passage means increasing throughout the stroke of said piston.
Claim 2
Dependent Claim
114 words
An energy absorption apparatus comprising: a piston connected to a piston rod; a cylinder, said piston being longitudinally movable within said cylinder adjacent the inner wall thereof; a compressible solid material located within said cylinder and pressurized to normally position said piston at one end of said cylinder in retracted position; said piston rod moving into said cylinder as said piston moves towards its extended position; and passage means in said inner wall of said cylinder to permit said material to move from one side of said piston to the other side upon movement of said piston within said cylinder, the flow area of said passage means increasing throughout the stroke of said piston.
Claim 3
Dependent Claim
25 words
An apparatus as defined within claim 1 wherein said passage means includes at least one longitudinal slot formed within said inner wall of said cylinder.
Claim 4
Dependent Claim
19 words
Apparatus as defined within claim 2 wherein said slot extends longitudinally of said cylinder and is variable in width.
Claim 5
Dependent Claim
23 words
Apparatus as defined within claim 1 wherein said cylinder inner wall comprises a sleeve inserted into said cylinder and containing said passage means.
Claim 6
Dependent Claim
25 words
An apparatus as defined in claim 1 wherein said passage means includes a plurality of longitudinal slots formed within said inner wall of said cylinder.
Claim 7
Dependent Claim
37 words
An apparatus as defined within claim 5 wherein each of said slots are of a different longitudinal length, said slots being adapted to successively be uncovered by said piston upon movement of said piston within said cylinder.
Claim 8
Dependent Claim
27 words
An apparatus as defined in claim 5 wherein a plurality of said slots are uncovered by said piston at said extended position to produce maximum slot area.
Claim 9
Dependent Claim
33 words
An apparatus as defined within claim 7 wherein at least one of said slots being variable in width, the narrow end of said slot being located at said retracted position for minimum damping.
Claim 10
Dependent Claim
51 words
An apparatus as defined within claim 4 wherein said passage means comprises a plurality of longitudinal slots which are successively uncovered by said piston as it moves toward said extended position, thereby progressively increasing the total uncovered slot area as the piston moves from the retracted position to the extended position.
Claim 11
Dependent Claim
16 words
An apparatus as defined within claim 9 wherein said slots being equiangularly spaced about said sleeve.
Claim 12
Dependent Claim
18 words
An apparatus as defined within claim 9 wherein each of said slots being of a different longitudinal length.
Claim 13
Dependent Claim
41 words
An apparatus as defined within claim 10 wherein at least one of said slots being variable in width, the smallest width of said variable width slot to communicate with said piston prior to communication of the larger width of said slot.
References Cited (Backward Citations)
US3588076A
Cited
US3659835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |