US4155423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kick-stool
Assignee: Individual
•
Filing: 1977-07-22
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Granted: 1979-05-22
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Expires: 1997-07-22
Abstract
Abstract A step stool comprising a base having a top surface adapted to be located upwardly from the ground; an aperture through the top surface; an elongated support; a platform on the support, the support being movable longitudinally through the aperture between a collapsed position in which the platform lies on the top surface and an extended position in which the platform is spaced upwardly from the top surface; and engagement means on the support operative to engage the surround of the aperture on one side of the aperture with the support bearing against the surround of the aperture on the opposite side of the aperture, to retain the support in its extended position against downward force exerted on the platform.
Inventors
- 👤 George C. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
A; A47; A47C; A47C12/00; A47C12/02; A47C13/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A step stool comprising a base having a top surface adapted to be located upwardly from the ground; an aperture through the top surface; an elongated support; a platform on the support, the support being movable longitudinally through the aperture between a collapsed position in which the platform lies on the top surface and an extended position in which the platform is spaced upwardly from the top surface; and engagement means on the support operative to engage the surround of the aperture on one side of the aperture with the support bearing against the surround of the aperture on the opposite side of the aperture, to retain the support in its extended position against downward force exerted on the platform.
Claim 2
Dependent Claim
120 words
A step stool comprising a base having a top surface adapted to be located upwardly from the ground; an aperture through the top surface; an elongated support; a platform on the support, the support being movable longitudinally through the aperture between a collapsed position in which the platform lies on the top surface and an extended position in which the platform is spaced upwardly from the top surface; and engagement means on the support operative to engage the surround of the aperture on one side of the aperture with the support bearing against the surround of the aperture on the opposite side of the aperture, to retain the support in its extended position against downward force exerted on the platform.
Claim 3
Dependent Claim
56 words
A step stool as claimed in claim 1, wherein the support is attached to the platform at an acute angle relative thereto, the support being arranged to be disposed at an angle to the vertical with the platform disposed generally parallel to the top surface of the base when the support is in its extended position.
Claim 4
Dependent Claim
81 words
A step stool as claimed in claim 2, wherein the support is disposed at an acute angle to the top surface of the base when the support is in its collapsed position, the support being movable from its collapsed position towards its extended position by first tilting one end of the platform upwardly relative to the top surface to bring the support into a generally right angular relationship with the top surface and thereafter moving the support upwardly through the aperture.
Claim 5
Dependent Claim
109 words
A step stool as claimed in claim 3, wherein the support comprises a flat strip-like element which is a relatively close fit in the aperture in the direction of the width of the support element and which is fast at one end with the platform, the support element being cut away in its width in a zone located towards its end which is fast with the platform and on the side located towards the end of the platform which is initially tilted upwardly during movement of the support from its collapsed position towards its extended position, to permit movement of the support element between its collapsed and extended positions.
Claim 6
Dependent Claim
29 words
A step stool as claimed in claim 1, wherein the engagement means on the support comprises a notch formation in the support towards its end remote from the platform.
Claim 7
Dependent Claim
43 words
A step stool as claimed in claim 1, including stop means operative to restrict movement of the support through the aperture and prevent complete withdrawal of the support through the aperture during movement of the support from its collapsed towards its extended position.
Claim 8
Dependent Claim
29 words
A step stool as claimed in claim 1, including a pair of laterally spaced supports each adapted to be movable longitudinally through its own aperture through the top surface.
Claim 9
Dependent Claim
145 words
A step stool as claimed in claim 1, wherein the base comprises a hollow body in which the support is housed when the latter is in its collapsed position and which has a multilateral cross-sectional configuration at least in a lower region thereof, the step stool further including a mounting element which extends across each corner of the lower region of the body in a position spaced upwardly from the bottom of the lower region and which is fast with a pair of adjacent walls of the lower region meeting at the corner; a wheel resiliently mounted on each mounting element and operative to rollably support the body on the ground in spaced relationship therewith under no-load conditions and to allow the bottom of the lower region of the body to be depressed into engagement with the ground when weight is applied to the stool.
Claim 10
Dependent Claim
108 words
A step stool as claimed in claim 8 wherein each wheel comprises a castor including a swivel pin on which the wheel is rotatably mounted; a mounting sleeve fast with the mounting element on the body at the corner in question, the swivel pin being rotatably located in the mounting sleeve and projecting therefrom on the side remote from the wheel; a retaining spring clip on the swivel pin towards its end projecting from the mounting sleeve; and a spring round the swivel pin in a position between the wheel and the mounting sleeve, the spring being operative resiliently to urge the wheel away from the mounting sleeve.
Claim 11
Independent Claim
127 words
A method of producing a step stool including the step of forming a stool base comprising a hollow body having a multilateral cross-sectional configuration at least in a lower region thereof, the hollow body being formed from a settable composition against the inner surface of a mould which is complementary to the required outer surface of the hollow body; and mounting a wheel mounting element in the hollow body across each corner thereof in a position spaced from the bottom of the lower region of the body, each mounting element being mounted by urging it into the material of a pair of adjacent walls of the lower region of the body meeting at the corner, before the settable composition from which the body is formed has set.
Claim 12
Independent Claim
127 words
A method of producing a step stool including the step of forming a stool base comprising a hollow body having a multilateral cross-sectional configuration at least in a lower region thereof, the hollow body being formed from a settable composition against the inner surface of a mould which is complementary to the required outer surface of the hollow body; and mounting a wheel mounting element in the hollow body across each corner thereof in a position spaced from the bottom of the lower region of the body, each mounting element being mounted by urging it into the material of a pair of adjacent walls of the lower region of the body meeting at the corner, before the settable composition from which the body is formed has set.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |