US3561564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trampoline
Assignee: Individual
•
Filing: 1969-04-09
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Granted: 1971-02-09
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Expires: 1989-04-09
Abstract
Abstract A trampoline, which is constructed to yieldingly resist the downward force exerted thereon by the user, and in which the rebounding action is controlled and directed to prevent accidental outward displacement of the user from the bed of the trampoline during rebound. The trampoline of the invention has a generally rectangular frame, constructed to contract by inward flexing of the sides of the frame in response to the downward force exerted by the user on the bed, and to expand by outward flexing of the sides to provide a rebounding action tending to cause the user''s body to move inwardly of the frame during rebound, whereby accidental displacement of the user outwardly beyond the frame is prevented. The frame is supported on U-shaped legs or support members which are shaped to yieldingly resist the contracting movement of the frame and to allow sagging movement of the frame in response to downward force exerted on the bed, whereby the directed rebounding action of the frame is augmented.
Inventors
- 👤 Edward W Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:16
CPC Classifications
A; A63; A63B; A63B5/00; A63B5/11; A63B21/00; A63B21/02; A63B21/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
197 words
In a trampoline: a generally rectangular frame formed of tubular material whose sides and ends are capable of inward and outward flexing movements; a trampoline bed within and connected to the sides and ends of the frame by a plurality of spaced resilient connectors each under tension to cause the sides and ends to flex inwardly upon the exertion of a downward force on the bed by the downward movement of an acrobat thereon and outwardly upon upward movement of the acrobat with the bed; and longitudinally spaced apart pairs of longitudinally spaced Ushaped legs extending laterally across the frame and whose arms are capable of flexing toward and away from each other and are connected at their upper ends to the sides of the frame at locations spaced longitudinally inwardly from the ends of an outwardly from the midpoints of the sides for flexing movement in response to flexing of the sides, the arms of adjacent ones of the legs of said pairs diverging downwardly and the arms of remote ones of the legs of said pairs converging downwardly and said legs being spaced apart at their lower ends longitudinally of the sides of the frame.
Claim 2
Dependent Claim
197 words
In a trampoline: a generally rectangular frame formed of tubular material whose sides and ends are capable of inward and outward flexing movements; a trampoline bed within and connected to the sides and ends of the frame by a plurality of spaced resilient connectors each under tension to cause the sides and ends to flex inwardly upon the exertion of a downward force on the bed by the downward movement of an acrobat thereon and outwardly upon upward movement of the acrobat with the bed; and longitudinally spaced apart pairs of longitudinally spaced Ushaped legs extending laterally across the frame and whose arms are capable of flexing toward and away from each other and are connected at their upper ends to the sides of the frame at locations spaced longitudinally inwardly from the ends of an outwardly from the midpoints of the sides for flexing movement in response to flexing of the sides, the arms of adjacent ones of the legs of said pairs diverging downwardly and the arms of remote ones of the legs of said pairs converging downwardly and said legs being spaced apart at their lower ends longitudinally of the sides of the frame.
Claim 3
Dependent Claim
60 words
The trampoline as claimed in claim 1 wherein the sides of said frame are capable of flexing vertically and the arms of said legs are disposed at angles to the vertical in planes parallel to the sides of the frame to cause the arms to flex in said planes in response to vertical movements of the ends of the frame.
Claim 4
Dependent Claim
236 words
In a trampoline: a generally rectangular frame formed of tubular material whose sides and ends are capable of inward and outward flexing movements; said sides being each formed of inner and outer tubular part; the inner part extending through and beyond the ends of and being tightly fitted into the outer part; said ends being each formed of tubular material of the same internal diameter as said outer part and having curved end portions positioned to form the corners of the frame and into which the end portions of said inner parts of the sides may be telescopingly extended to connect the sides to said ends; a trampoline bed within and connected to the sides and ends of the frame by a plurality of spaced resilient connectors each under tension to cause the sides and ends to flex inwardly upon the exertion of a downward force on the bed by the downward movement of an acrobat thereon and outwardly upon upward movement of the acrobat with the bed; and longitudinally spaced apart tubular support means of generally U-shape extending laterally across the frame and whose arms are capable of flexing toward and away from each other and are connected at their upper ends to the sides of the frame at locations spaced longitudinally inwardly from the ends of and outwardly from the midpoints of the sides for flexing movement in response to flexing of the sides.
Claim 5
Dependent Claim
236 words
In a trampoline: a generally rectangular frame formed of tubular material whose sides and ends are capable of inward and outward flexing movements; said sides being each formed of inner and outer tubular part; the inner part extending through and beyond the ends of and being tightly fitted into the outer part; said ends being each formed of tubular material of the same internal diameter as said outer part and having curved end portions positioned to form the corners of the frame and into which the end portions of said inner parts of the sides may be telescopingly extended to connect the sides to said ends; a trampoline bed within and connected to the sides and ends of the frame by a plurality of spaced resilient connectors each under tension to cause the sides and ends to flex inwardly upon the exertion of a downward force on the bed by the downward movement of an acrobat thereon and outwardly upon upward movement of the acrobat with the bed; and longitudinally spaced apart tubular support means of generally U-shape extending laterally across the frame and whose arms are capable of flexing toward and away from each other and are connected at their upper ends to the sides of the frame at locations spaced longitudinally inwardly from the ends of and outwardly from the midpoints of the sides for flexing movement in response to flexing of the sides.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |