US5039087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power stairclimber
Assignee: Individual
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Filing: 1990-05-11
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Granted: 1991-08-13
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Expires: 2010-05-11
Abstract
Abstract This invention relates to a power stairclimber and in particular to one including a base on which there are mounted a pair of pedals and a handlebar, a gear pivoted on the base, two driving rods respectively mounted on two sides of the gear and arranged at opposite directions, two cranks rotatably connected at one end with the lugs of the base and at the other end with the driving rods and a worm gear meshed with the gear and having on the top a pulley which is in turn connected with a motor via a belt.
Inventors
- 👤 Hai-Pin Kuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:11
CPC Classifications
A; A61; A61H; A61H1/00; A61H1/02; A61H1/0237; A61H1/0255; A61H2201/00; A61H2201/12; A61H2201/1207; A61H2201/1215; A61H2201/14; A61H2201/16; A61H2201/1602; A61H2201/164; A61H2201/1657; A61H2201/1676; A61H2203/00; A61H2203/04; A61H2203/0406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A power stairclimber comprising: a base on which there are mounted a left pedal, right pedal and a handlebar, said pedals being movably mounted on said base at the rear end of said base and said pedals having a lug on their respective top; a gear rotatably mounted on said base; two driving rods respectively mounted on two sides of said gear and oriented in opposite coaxial opposite directions; two cranks rotatably connected at one end with the lugs of said base and at the other end with said driving rods; and a worm gear meshed with said gear and having at one end a pulley which is in turn connected with a motor via a belt; whereby when said motor rotates, said worm gear rotates and drives said rods thereby reciprocating said pedals.
Claim 2
Dependent Claim
134 words
A power stairclimber comprising: a base on which there are mounted a left pedal, right pedal and a handlebar, said pedals being movably mounted on said base at the rear end of said base and said pedals having a lug on their respective top; a gear rotatably mounted on said base; two driving rods respectively mounted on two sides of said gear and oriented in opposite coaxial opposite directions; two cranks rotatably connected at one end with the lugs of said base and at the other end with said driving rods; and a worm gear meshed with said gear and having at one end a pulley which is in turn connected with a motor via a belt; whereby when said motor rotates, said worm gear rotates and drives said rods thereby reciprocating said pedals.
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) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |