US4620714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ambulatory wheelstand
Assignee: Individual
•
Filing: 1984-05-23
•
Granted: 1986-11-04
•
Expires: 2004-05-23
Abstract
Abstract The present invention discloses a wheelstand for handicapped or immobile persons having a generally rectangular main frame rotatably supported on a ground support surface by relatively small wheels while larger wheels are rotatably mounted to the frame and manually rotated by the user in order to propel the frame. A generally planar body support structure is pivotally carried by the frame so that the angular position of the support structure can be varied with respect to the frame while still enabling the user to grip the larger wheels and propel the wheelstand.
Inventors
- 👤 Daniel W. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:30
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/14; A61G5/1091; A61G5/12; A61G5/125; A61G5/128; A61G2200/00; A61G2200/30; A61G2200/32; A61G2200/325; A61G2200/36; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319; Y10T403/32368
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
223 words
An ambulatory wheelstand comprising: an elongated frame having a front end and a rear end; at least one wheel attached to said frame adjacent said rear end; at least two axially aligned wheels rotatably secured to an axis at a midpoint of said frame, said wheels having an outer circular periphery; an articulated user support structure, means for pivotally attaching said user support structure to said frame about a pivotal axis, wherein said support structure is normally maintained in a substantially planar position thereby maintaining the user in a substantially erect position and wherein said support structure comprises a planar torso support, a pair of leg supports pivotally attached to the bottom end of said torso support and a foot rest pivotally secured to each leg support; said pivotal axis being within the outer circular periphery of said aligned wheels and closely adjacent the axis of said aligned wheels so that the distance between the hands of a person supported on said support structure and the outer periphery of said aligned wheels is substantially constant despite the pivotal position of said support structure, means for adjusting the pivotal position of said user support structure relative to said frame; and said axially aligned wheels being dimensioned to be manually grasped and rotated by the user from any angular position of said user support structure.
Claim 2
Dependent Claim
223 words
An ambulatory wheelstand comprising: an elongated frame having a front end and a rear end; at least one wheel attached to said frame adjacent said rear end; at least two axially aligned wheels rotatably secured to an axis at a midpoint of said frame, said wheels having an outer circular periphery; an articulated user support structure, means for pivotally attaching said user support structure to said frame about a pivotal axis, wherein said support structure is normally maintained in a substantially planar position thereby maintaining the user in a substantially erect position and wherein said support structure comprises a planar torso support, a pair of leg supports pivotally attached to the bottom end of said torso support and a foot rest pivotally secured to each leg support; said pivotal axis being within the outer circular periphery of said aligned wheels and closely adjacent the axis of said aligned wheels so that the distance between the hands of a person supported on said support structure and the outer periphery of said aligned wheels is substantially constant despite the pivotal position of said support structure, means for adjusting the pivotal position of said user support structure relative to said frame; and said axially aligned wheels being dimensioned to be manually grasped and rotated by the user from any angular position of said user support structure.
Claim 3
Dependent Claim
28 words
The ambulatory wheelstand as defined in claim 1 and comprising means for adjusting the longitudinal position of said at least one footrest with respect to said support structure.
Claim 4
Dependent Claim
23 words
The ambulatory wheelstand as defined in claim 1 and comprising a handlebar, and means for pivotally mounting said handlebar to said support structure.
Claim 5
Dependent Claim
25 words
The ambulatory wheelstand as defined in claim 1 and comprising a utility tray and means for pivotally mounting said utility tray to said support structure.
Claim 6
Dependent Claim
21 words
The ambulatory wheelstand as defined in claim 1 and comprising means for longitudinally adjustably securing said support structure to said frame.
Claim 7
Dependent Claim
16 words
The ambulatory wheelstand as defined in claim 1 wherein said torso support means is extendably adjustable.
Claim 8
Dependent Claim
49 words
The ambulatory wheelstand as defined in claim 1 wherein said frame comprises a cross member adjacent its front end, said support structure comprising a cross member at a midpoint and wherein said adjusting means comprises a hinge connected between said frame cross member and said support structure cross member.
Claim 9
Dependent Claim
26 words
The ambulatory wheelstand as defined in claim 7 and comprising means for locking said support structure to said frame at a plurality of different angular positions.
Claim 10
Dependent Claim
56 words
The invention as defined in claim 8 wherein said locking means comprises: a first elongated strut having one end pivotally secured to said support structure, a second elongated strut having one end pivotally secured to said frame, and means for detachably securing the other ends of said struts together at a plurality of different angular positions.
Claim 11
Dependent Claim
23 words
The invention as defined in claim 1 and comprising means for both longitudinally and vertically adjustably securing said support structure to said frame.
Claim 12
Dependent Claim
25 words
The ambulatory wheelstand as defined in claim 1 and comprising at least one stabilizing wheel rotatably mounted to said frame forwardly of said aligned wheels.
Claim 13
Dependent Claim
21 words
The ambulatory wheelstand as defined in claim 11 further comprising means for longitudinally adjustably securing said stabilizing wheel to said frame.
Claim 14
Dependent Claim
21 words
The ambulatory wheelstand as defined in claim 1 further comprising means attached to said frame for manually braking said aligned wheels.
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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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |