US4019756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baby walker
Assignee: Tomy Kogyo Co Ltd
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Filing: 1975-08-18
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Granted: 1977-04-26
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Expires: 1995-08-18
Abstract
Abstract There is disclosed a baby walker to be used by a child wherein the body of the child is supported above the ground so that the feet of the child are in contact with the ground, thus permitting the child to propel the baby walker. The baby walker comprises means for permitting the walker to be collapsed or expanded, and means for locking said collapsing and expanding means to fix top and bottom members of the baby walker in a desired one of several positions. In this manner, the seat supporting the child is adjustable so that the distance to the ground may be controlled for different sized children, or for the same child over a period of growth.
Inventors
- 👤 Hajime Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:17
CPC Classifications
A; A47; A47D; A47D1/00; A47D1/002; A47D1/004; A47D13/00; A47D13/04; A47D13/043
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
377 words
A walker, comprising: a top member provided with an opening therein and a seat suspended below said opening; a bottom member; means operably connecting said top and bottom members for permitting the walker to be collapsed, wherein said top and bottom members are positioned near each other, and for permitting the walker to be expanded through several positions wherein the distance between said top and bottom members is variably adjusted, said collapsing and expanding means comprises a first strut having a top portion mounted to said top member for rotation about a fixed axis and a bottom portion consisting of arms, said bottom member including means for mounting said arms of said first strut to slide with respect to said bottom member, said collapsing and expanding means also comprising a second strut having a top portion and a bottom portion consisting of arms, said top member including means permitting said top portion to slide along the underneath of said top member, said bottom member including means for mounting said arms of said second strut to rotate about fixed points on said bottom member, said struts having intermediate portions between said top and bottom portions intersecting each other on each side of said walker, said top member slide means comprises a block, wherein said top portion of said second strut passes through said block and is mounted to rotate about an axis through said block, a rail mounted longitudinally below said top member, said block mounted to slide along said rail, and means located on said top member for locking said collapsing and expanding means to set said top and bottom members in a desired one of said positions, wherein said locking means comprises a series of teeth along said rail, a threaded post extending outwardly from said block, a knob threaded on said post, and a member intermediately adjacent said rail and said knob provided with teeth complementary in configuration with respect to said teeth of said rail, such that as said knob is threaded on said post said knob forces said teeth of said member into engagement with said teeth of said rail prohibiting said top portion of said second strut from sliding, thereby locking said collapsing and expanding means in one of said several positions.
Claim 2
Dependent Claim
377 words
A walker, comprising: a top member provided with an opening therein and a seat suspended below said opening; a bottom member; means operably connecting said top and bottom members for permitting the walker to be collapsed, wherein said top and bottom members are positioned near each other, and for permitting the walker to be expanded through several positions wherein the distance between said top and bottom members is variably adjusted, said collapsing and expanding means comprises a first strut having a top portion mounted to said top member for rotation about a fixed axis and a bottom portion consisting of arms, said bottom member including means for mounting said arms of said first strut to slide with respect to said bottom member, said collapsing and expanding means also comprising a second strut having a top portion and a bottom portion consisting of arms, said top member including means permitting said top portion to slide along the underneath of said top member, said bottom member including means for mounting said arms of said second strut to rotate about fixed points on said bottom member, said struts having intermediate portions between said top and bottom portions intersecting each other on each side of said walker, said top member slide means comprises a block, wherein said top portion of said second strut passes through said block and is mounted to rotate about an axis through said block, a rail mounted longitudinally below said top member, said block mounted to slide along said rail, and means located on said top member for locking said collapsing and expanding means to set said top and bottom members in a desired one of said positions, wherein said locking means comprises a series of teeth along said rail, a threaded post extending outwardly from said block, a knob threaded on said post, and a member intermediately adjacent said rail and said knob provided with teeth complementary in configuration with respect to said teeth of said rail, such that as said knob is threaded on said post said knob forces said teeth of said member into engagement with said teeth of said rail prohibiting said top portion of said second strut from sliding, thereby locking said collapsing and expanding means in one of said several positions.
Claim 3
Dependent Claim
18 words
A walker as in claim 1, including means for permitting said bottom member to roll along a surface.
References Cited (Backward Citations)
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US2770288A
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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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |