Patent US4633962A successfully refreshed from Google Patents.
US4633962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Articulated wheel chair
Assignee: Individual
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Filing: 1985-12-02
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Granted: 1987-01-06
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Expires: 2005-12-02
Abstract
Abstract An articulated wheel chair includes front and rear sections which are pivotally connected together to permit pivoting therebetween about a vertical axis. The front section is provided with a pair of support wheels and the rear section is provided with a pair of propulsion wheels driven by an electric motor. A seat for the occupant is pivotally mounted on the rear section and is connected to the front section by a link to cause pivoting of the seat in response to articulated pivoting movement between the sections.
Inventors
- 👤 Francis C. Cox
- 👤 Darryl R. Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:51
CPC Classifications
B; B62; B62D; B62D53/00; B62D53/02; A; A61; A61G; A61G5/00; A61G5/04; A61G5/041; A61G5/045; B62K; B62K5/00; B62K5/003; B62K5/007; B62K5/02; B62K5/023; B62K5/025; Y; Y10; Y10S; Y10S180/00; Y10S180/907
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
An articulated wheel chair comprising: a front section having a pair of support wheels journaled thereon for support thereof, a rear section having a pair of propulsion wheels connected thereto for support thereof, means pivotally connecting said front and rear sections together for pivotal movement therebetween about an articulating vertical axis, power means on said rear section drivably connected to said propulsion wheels for driving the latter, a seat pivotally mounted on said rear section for pivotal movement relative thereto, a generally vertically disposed elongate steering rod on said front section and being rotatable about its longitudinal axis, means interconnecting said steering rod with said rear section to produce articulated pivotal movement between the sections in response to rotation of said steering rod, and motion transmitting means interconnecting said front section with said seat for causing pivoting of the seat in response to articulated pivoting movement between the sections.
Claim 2
Dependent Claim
149 words
An articulated wheel chair comprising: a front section having a pair of support wheels journaled thereon for support thereof, a rear section having a pair of propulsion wheels connected thereto for support thereof, means pivotally connecting said front and rear sections together for pivotal movement therebetween about an articulating vertical axis, power means on said rear section drivably connected to said propulsion wheels for driving the latter, a seat pivotally mounted on said rear section for pivotal movement relative thereto, a generally vertically disposed elongate steering rod on said front section and being rotatable about its longitudinal axis, means interconnecting said steering rod with said rear section to produce articulated pivotal movement between the sections in response to rotation of said steering rod, and motion transmitting means interconnecting said front section with said seat for causing pivoting of the seat in response to articulated pivoting movement between the sections.
Claim 3
Dependent Claim
23 words
The articulated wheel chair as defined in claim 1 and a foot rest secured to said front section adjacent the front end thereof.
Claim 4
Dependent Claim
41 words
The articulated wheel chair as defined in claim 1 wherein said power means comprises a reversible electric motor and circuit means controlling operation of said electric motor including a forward and reverse switch for selectively reversing operation of said electric motor.
Claim 5
Dependent Claim
32 words
The articlulated wheel chair as defined in claim 3 wherein said circuit means includes a speed control circuit and switch means interposed in said speed control circuit for selectively controlling the same.
Claim 6
Dependent Claim
24 words
The articulated wheel chair as defined in claim 1 wherein said means interconnecting said steering rod with said rear section includes a flexible member.
Claim 7
Dependent Claim
31 words
The articulated wheel chair as defined in claim 5 wherein said flexible member includes an elongate chain and a sprocket interconnected with said steering rod and being engaged by said chain.
Claim 8
Dependent Claim
31 words
The articulated wheel chair as defined in claim 5 and a resilient member connected with said flexible member and being operable to urge the front and rear sections into aligned relation.
Claim 9
Dependent Claim
39 words
The articulated wheel chair as defined in claim 1 wherein said motion transmitting means comprises an elongate link having one end thereof pivotally connected to said seat and having the other end thereof pivotally connected to said front section.
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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |