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US4773639A Expired / Lapsed US ⏱️ 0.0 years remaining

Infant walker

Assignee: Individual
•
Filing: 1987-05-13
•
Granted: 1988-09-27
•
Expires: 2007-05-13
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Abstract

Abstract A walker for use by infants in learning to walk includes a pair of spaced apart closed ring structures that are supported apart by a plurality of inwardly inclined adjustable struts. The rings are of a variable diameter with the lower ring defining a base substantially larger than the upper ring. The upper ring is sized to substantially fit the torso of the infant so as to confine the infant and prevent the infant from falling. The lower, larger ring provides an enlarged base which prevents the apparatus from tipping during use. The infant grips the upper ring during use. The adjustable struts allow adjustment between the upper and lower rings so that the device can be sized to fit each user of different height.

Inventors

  • 👤 Kurt M. Graves

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 06:13
CPC Classifications
A; A47; A47D; A47D13/00; A47D13/04; A47D13/043; A47D13/046

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 289 words
An infant walker comprising: a. a pair of spaced apart squared rings, each having four corners, including an upper smaller ring that closely approximates a position adjacent the torso of an infant and a lower larger ring, each respectively lying in parallel spaced apart planes; b. a plurality of angled struts extending outwardly and downwardly from the upper ring at a position generally between adjacent corners of the upper ring and connecting to the lower ring at a position generally between adjacent corners of the lower ring each of the angled struts being inclined between the upper and lower rings along a generally straight line; c. means for adjusting the length of each angled strut to vary the elevation between the rings; d. the lower squared ring forming a continuous ground contacting surface which can slide upon and form an interface with the supporting terrain being traversed by the infant; and e. means for discouraging a tipping of the upper ring with respect to the lower ring and a corresponding tilting of the vertical axis of the walker trainer, comprising the four lower corners and a plurality of four radially spaced apart horizontal struts extending in a substantially straight line outwardly from the lower squared ring, terminating at horizontal strut free ends, the horizontal struts being positioned at four respective positions generally between adjacent corners of the lower squared ring and the horizontal struts each lying in a horizontal plane therewith, and the horizontal struts being adapted and positioned to slide with the lower ring, the free ends of the horizontal struts and the lower ring corners defining the outer dimensional limits of the support plane area that is larger than the area encompassed by the lower squared ring.
Claim 2
Dependent Claim 289 words
An infant walker comprising: a. a pair of spaced apart squared rings, each having four corners, including an upper smaller ring that closely approximates a position adjacent the torso of an infant and a lower larger ring, each respectively lying in parallel spaced apart planes; b. a plurality of angled struts extending outwardly and downwardly from the upper ring at a position generally between adjacent corners of the upper ring and connecting to the lower ring at a position generally between adjacent corners of the lower ring each of the angled struts being inclined between the upper and lower rings along a generally straight line; c. means for adjusting the length of each angled strut to vary the elevation between the rings; d. the lower squared ring forming a continuous ground contacting surface which can slide upon and form an interface with the supporting terrain being traversed by the infant; and e. means for discouraging a tipping of the upper ring with respect to the lower ring and a corresponding tilting of the vertical axis of the walker trainer, comprising the four lower corners and a plurality of four radially spaced apart horizontal struts extending in a substantially straight line outwardly from the lower squared ring, terminating at horizontal strut free ends, the horizontal struts being positioned at four respective positions generally between adjacent corners of the lower squared ring and the horizontal struts each lying in a horizontal plane therewith, and the horizontal struts being adapted and positioned to slide with the lower ring, the free ends of the horizontal struts and the lower ring corners defining the outer dimensional limits of the support plane area that is larger than the area encompassed by the lower squared ring.

References Cited (Backward Citations)

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US321867A Cited
US1176048A Cited
US2657735A Cited
US2884046A Cited
US3235254A Cited
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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) 1991-09-27 1992-03-28 1992-09-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-09-27 1996-03-28 1996-09-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-09-27 2000-03-28 2000-09-27 $7700.00 Window Closed / Lapsed

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