Patent US4144821A successfully refreshed from Google Patents.
US4144821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft cargo pallet restraint
Assignee: Individual
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Filing: 1977-04-13
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Granted: 1979-03-20
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Expires: 1997-04-13
Abstract
Abstract There is disclosed a cargo restraint for palletized cargo which is detachably secured to rails or frame members such as a conventional seat rail in an aircraft cargo hold. The restraint includes a frame and a folding assembly of a pawl plate member with fore and aft folding support links therefor whereby the pawl plate member can be folded into a retracted position, within the confines of the frame and elevated therefrom into an elevated, cargo pallet engaging position. The pawl plate member extends fore and aft of the support links to restrain the edges of adjacent cargo pallets. The frame is provided with a transverse web immediately forward of the support links to serve as an abutment stop therefor, restraining the links in the extended position and accommodating high acceleration forces in a forward direction. The assembly is provided with a resilient springs to urge it into the retracted position and a locking member secures the assembly in the extended position against the bias of the resilient springs.
Inventors
- 👤 Robert D. Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:18
CPC Classifications
B; B60; B60P; B60P7/00; B60P7/06; B60P7/08; B64; B64D; B64D9/00; B64D9/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A folding cargo restraint which comprises: a frame of longitudinal and end cross members; a pawl plate member; aft leg means and fore leg means, each means pivotally mounted within said frame between said longitudinal members and pivotally attached to said pawl plate member and in parallel alignment to each other to permit retraction of said pawl plate member and aft and fore leg means as a folding parallelogram into a folded position within said frame, and raising of said pawl plate member and leg means into an erected cargo restraining position, elevated above said frame; and a transverse rib member spaning between said longitudinal members immediately forward of said fore leg means to provide an abutment to restrain forward movement of said leg means when said pawl plate member is in its erected position.
Claim 2
Dependent Claim
135 words
A folding cargo restraint which comprises: a frame of longitudinal and end cross members; a pawl plate member; aft leg means and fore leg means, each means pivotally mounted within said frame between said longitudinal members and pivotally attached to said pawl plate member and in parallel alignment to each other to permit retraction of said pawl plate member and aft and fore leg means as a folding parallelogram into a folded position within said frame, and raising of said pawl plate member and leg means into an erected cargo restraining position, elevated above said frame; and a transverse rib member spaning between said longitudinal members immediately forward of said fore leg means to provide an abutment to restrain forward movement of said leg means when said pawl plate member is in its erected position.
Claim 3
Dependent Claim
25 words
The cargo restraint of claim 1 including resilient means biased between said frame and leg means to urge said leg means toward said folded position.
Claim 4
Dependent Claim
38 words
The cargo restraint of claim 2 wherein said fore leg means comprises a pair of lateral, spaced-apart legs with a crossbar therebetween and said resilient means are biased between the transverse rib of said frame and said crossbar.
Claim 5
Dependent Claim
37 words
The cargo restraint of claim 3 wherein said fore leg means is pivotally mounted on a pin extending through distal bores in said spaced-apart legs and said resilient means comprises torsion coil springs about said through pin.
Claim 6
Dependent Claim
56 words
The cargo restraint of claim 2 including lock means engageable between a detenting position locking said pawl plate member and leg means in its errected cargo restraining position against the bias of said resilient means and a releasing position permitting said resilient means to urge said pawl plate member and leg means into its folded position.
Claim 7
Dependent Claim
41 words
The cargo restraint of claim 5 wherein said lock means comprises a plate pivotally attached at its fore edge of said aft leg means and bearing, at its trailing edge, pin means distally received in grooves in said longitudinal frame members.
Claim 8
Dependent Claim
28 words
The cargo restraint of claim 6 wherein said grooves have transverse legs constituting detent portions to receive said pin means at the detenting position of said lock means.
Claim 9
Dependent Claim
20 words
The cargo restraint of claim 6 wherein said plate bears a raised handle permitting its retraction from its detenting position.
Claim 10
Dependent Claim
32 words
The cargo restraint of claim 1 wherein said aft and fore leg means are pivotally mounted in said restraint for abutting engagement when said pawl is in its erected cargo restraining position.
Claim 11
Dependent Claim
20 words
The cargo restraint of claim 9 whrein said aft and fore leg members are pivotally mounted on vertically staggered centerlines.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |