Patent US3664463A successfully refreshed from Google Patents.
US3664463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deployable shock absorber
Assignee: Lockheed Martin Corp
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Filing: 1970-11-10
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Granted: 1972-05-23
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Expires: 1990-11-10
Abstract
Abstract A deployable shock absorber including a cylinder closed at one end and a piston having a latch assembly disposed at the opposite end; a tubular sleeve of crushable shock absorbing material is mounted in the cylinder, coaxially therewith, one end of the sleeve abutting the closed end of the cylinder, and the opposite end of the sleeve abutting the inner face of the piston. A piston rod is slidably mounted within the tubular sleeve, whereby in the retracted position the inner end of the piston rod abuts the closed end of the cylinder; when extended, the inner end of the piston rod becomes latched to the piston, and upon impact, the piston rod and associated piston are driven inwardly toward the closed end of the cylinder to thereby crush the sleeve, whereby the impact shock is absorbed.
Inventors
- 👤 Melvin W Kuethe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:29
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/12; F16F7/125; B; B64; B64G; B64G1/00; B64G1/22; B64G1/62; B64G1/625
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A deployable shock absorber of the character described comprising a cylinder, a piston rod slidably mounted within said cylinder, a piston disposed within said cylinder, said pIston rod being detached from said piston when in the inoperative retracted position, latch means for connecting said piston rod to said piston when said piston rod is disposed in the extended position, and a shock absorbing medium disposed in said cylinder.
Claim 2
Dependent Claim
68 words
A deployable shock absorber of the character described comprising a cylinder, a piston rod slidably mounted within said cylinder, a piston disposed within said cylinder, said pIston rod being detached from said piston when in the inoperative retracted position, latch means for connecting said piston rod to said piston when said piston rod is disposed in the extended position, and a shock absorbing medium disposed in said cylinder.
Claim 3
Dependent Claim
28 words
A deployable shock absorber according to claim 1 wherein means are operatively connected to the cylinder and piston rod for moving the piston rod to the extended position.
Claim 4
Dependent Claim
58 words
A deployable shock absorber according to claim 1 wherein an end wall is formed on one end of said cylinder, and a head portion formed on the inner end of said piston engaging said cylinder end wall when said piston rod is disposed in the retracted position, the piston being positioned at the opposite end of the cylinder.
Claim 5
Dependent Claim
57 words
A deployable shock absorber according to claim 1 wherein the latch means comprises a plurality of radially extending spring biased detents mounted within said piston, and an annular groove formed on said piston rod adjacent the inner end thereof, said detents being adapted to engage the annular groove whereby the piston rod becomes latched to the piston.
Claim 6
Dependent Claim
49 words
A deployable shock absorber according to claim 3 wherein the shock absorbing medium comprises a tubular sleeve of crushable shock absorbing material mounted in the cylinder coaxially therewith, one end of the sleeve abutting the end wall of the cylinder, the opposite end of the sleeve abutting the piston.
Claim 7
Dependent Claim
27 words
A deployable shock absorber according to claim 1, wherein a detent mechanism is mounted on the cylinder for holding the piston rod in the inoperative, retracted position.
Claim 8
Dependent Claim
34 words
A deployable shock absorber according to claim 2, wherein the means for moving the piston rod to the extended position comprises a conduit connected to the cylinder and adapted to supply pressurized fluid thereto.
Claim 9
Dependent Claim
36 words
A deployable shock absorber according to claim 2 wherein the means for moving the piston rod to the extended position comprises a coil spring mounted between an end wall of the cylinder and the piston rod.
Claim 10
Dependent Claim
56 words
A deployable shock absorber according to claim 2, wherein the means for moving the piston rod to the extended position comprises a torsion spring, said torsion spring being mounted on a supporting surface, one end of the spring being secured to the surface and the opposite end of the spring being connected to the piston rod.
Claim 11
Dependent Claim
35 words
A deployable shock absorber according to claim 5, wherein the tubular sleeve is formed from a plurality of crushable shock absorbing materials, each having a different crush strength, to thereby provide a variable load-stroke curve.
Claim 12
Dependent Claim
23 words
A deployable shock absorber according to claim 5, wherein the tubular sleeve is formed from a corrugated sheet wound into a cylindrical spiral.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |