US4086980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dismantling ladder
Assignee: Individual
•
Filing: 1977-02-11
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Granted: 1978-05-02
•
Expires: 1997-02-11
Abstract
Abstract A dismantling ladder is provided wherein the rails are made of different sizes with the rungs of a still smaller size so that one rail can be telescoped inside the other and a rung telescoped inside the smaller rail so that the ladder can be stored in minimum of space.
Inventors
- 👤 Lois E. Shortes
- 👤 Joan A. Shortes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:32
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/04; E06C1/08; E06C1/10; E06C1/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A dismantable ladder comprising in combination: a. a plurality of pairs of rails, each pair comprising a large rail and a small rail, said small rail being of a size to telescope inside a large rail, b. a plurality of removable rungs, each removable rung being of a size to telescope inside a small rail, c. complementary holes in said rails to receive said rungs, and d. a plurality of connector elements, each connector element including a fixed rung with a double socket affixed to each end thereof, each of said double sockets having a first opening facing up and a second opening facing down, the sockets on one end having openings to receive a large rail and on the opposite end to receive a small rail, and a barrier with each of said sockets to prevent a rail from passing completely through the socket.
Claim 2
Dependent Claim
145 words
A dismantable ladder comprising in combination: a. a plurality of pairs of rails, each pair comprising a large rail and a small rail, said small rail being of a size to telescope inside a large rail, b. a plurality of removable rungs, each removable rung being of a size to telescope inside a small rail, c. complementary holes in said rails to receive said rungs, and d. a plurality of connector elements, each connector element including a fixed rung with a double socket affixed to each end thereof, each of said double sockets having a first opening facing up and a second opening facing down, the sockets on one end having openings to receive a large rail and on the opposite end to receive a small rail, and a barrier with each of said sockets to prevent a rail from passing completely through the socket.
Claim 3
Dependent Claim
29 words
The structure of claim 1 wherein each socket is provided with a removable pin fitting into a mating hole in a rail to hold the rail in said socket.
Claim 4
Dependent Claim
17 words
The structure of claim 1 including at least one ladder end section having weight distribution feet thereon.
Claim 5
Dependent Claim
15 words
The structure of claim 1 wherein the rails and rungs are of circular cross section.
Claim 6
Dependent Claim
29 words
The structure of claim 1 wherein the holes in the rails and the ends of the rungs are of non-circular shape whereby the rung cannot turn in the holes.
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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |