Patent US4427094A successfully refreshed from Google Patents.
US4427094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable elevator device
Assignee: Individual
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Filing: 1981-07-10
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Granted: 1984-01-24
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Expires: 2001-07-10
Abstract
Abstract This invention is an electrically powered movable elevator device comprised of a base mounted on wheels upon which is mounted a substantially vertical hollow support member through which a screw passes. A support nut attaches to a platform and engages the screw. An electrical control system attached to the platform allows a person standing thereon to be raised or lowered by the rotation of the screw. A reversible electric motor is belt-coupled to the screw which may be made to rotate in either direction, by the electrical control system.
Inventors
- 👤 Dean R. Winkelblech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:11
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
211 words
A movable elevator device comprising in combination: a base member; wheel means attached to said base member; said wheel means being comprised of, in combination: a wheel support member adjustably extending within said base member; a wheel rotatably attached to wheel support member; braking means connected to said wheel; a clamping screw extending through said base member and bearing against said wheel support member; an electric motor adjustably attached to said base member; a substantially vertical screw rotatably coupled to said electric motor; a hollow screw enclosing member attached to said base member and enclosing said screw; a support nut rotatably engaged with said screw; an inner slide connected to said support nut and in sliding contact with the interior surface of said screw enclosing member; a foot platform attached to said inner slide; a control arm connected to said foot platform; an adjustable shelf means connected to said control arm; said adjustable shelf means comprised of, in combination: a shelf having a sleeve thereon, said sleeve encircling said control arm; a thumb screw extending through said sleeve to bear against said control arm; an elevator control switch attached to said control arm and in electrical contact with said electric motor; and a power source connected to said elevator control switch.
Claim 2
Dependent Claim
211 words
A movable elevator device comprising in combination: a base member; wheel means attached to said base member; said wheel means being comprised of, in combination: a wheel support member adjustably extending within said base member; a wheel rotatably attached to wheel support member; braking means connected to said wheel; a clamping screw extending through said base member and bearing against said wheel support member; an electric motor adjustably attached to said base member; a substantially vertical screw rotatably coupled to said electric motor; a hollow screw enclosing member attached to said base member and enclosing said screw; a support nut rotatably engaged with said screw; an inner slide connected to said support nut and in sliding contact with the interior surface of said screw enclosing member; a foot platform attached to said inner slide; a control arm connected to said foot platform; an adjustable shelf means connected to said control arm; said adjustable shelf means comprised of, in combination: a shelf having a sleeve thereon, said sleeve encircling said control arm; a thumb screw extending through said sleeve to bear against said control arm; an elevator control switch attached to said control arm and in electrical contact with said electric motor; and a power source connected to said elevator control switch.
Claim 3
Dependent Claim
22 words
The combination as claimed in claim 1, in which said electric motor is coupled to said screw enclosing member by adjustable means.
Claim 4
Dependent Claim
51 words
The combination as claimed in claim 2, having in combination: a vertical support member connecting said screw enclosing member and said base member; a removable pin extending through said vertical support member and said screw enclosing member; and a removable slidable means connecting said vertical support member and said base member.
Claim 5
Dependent Claim
49 words
The combination as claimed in claim 3, having in combination: a hand hold member connecting said base member and said vertical support member; removable screw means attaching said hand hold member to said base member; and removable slidable means attaching said hand hold member to said vertical support member.
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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |