Patent US3881575A successfully refreshed from Google Patents.
US3881575A
Expired / Lapsed
US
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Vertical transportation and elevator system
Assignee: Individual
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Filing: 1972-12-11
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Granted: 1975-05-06
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Expires: 1992-12-11
Abstract
Abstract An elevator and vertical transportation system is provided in which a vertical screw member is used in conjunction with an essentially friction-free nut, as the vertical driving means for an elevator cab, the screw member being mounted so as always to be in tension during such use, rather than in compression and subject to compressive bending. The essentially friction-free nut is driven, for example, by means of an electric motor mounted on the cab so that the nut and the elevator cab may be moved up and down with respect to the suspended vertical screw. It is apparent, however, that the vertical screw, rather than the nut may be rotatably driven so as to achieve the desired vertical movement of the elevator cab.
Inventors
- 👤 Carlisle F Manaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:30
CPC Classifications
B; B66; B66B; B66B9/00; B66B9/02; B66B9/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
256 words
A vertical transportation and elevator system including: a vertical supporting frame having an upper end and a lower end; an elongated screw member; mounting means for suspending the elongated screw member in a vertical position on said supporting frame, said mounting means including an upper support means mounted at the upper end of said supporting frame and affixed to the upper end of said elongated screw member, and a lower support means mounted at the lower end of said supporting frame for receiving the lower end of said screw member, the lower end of said screw member being free to move in a vertical linear direction, said lower support means including a bracket to receive the lower end of said screw member and tensioning means connected to the lower end of said screw member to maintain said screw member in tension between the upper and lower support means for all load conditions of the system, said tensioning means including a resilient block member mounted coaxially with said screw member and engaging the under side of said bracket, and nut means threaded to the lower end of said screw member and engaging the underside of said resilient block; an assembly including a nut member threadably mounted to said screw member; an elevator cab; means coupling said elevator cab to said nut assembly; and drive means coupled to one of the aforesaid members for imparting relative rotational movement between said nut member and said screw member to cause said cab member to move vertically in a linear direction.
Claim 2
Dependent Claim
256 words
A vertical transportation and elevator system including: a vertical supporting frame having an upper end and a lower end; an elongated screw member; mounting means for suspending the elongated screw member in a vertical position on said supporting frame, said mounting means including an upper support means mounted at the upper end of said supporting frame and affixed to the upper end of said elongated screw member, and a lower support means mounted at the lower end of said supporting frame for receiving the lower end of said screw member, the lower end of said screw member being free to move in a vertical linear direction, said lower support means including a bracket to receive the lower end of said screw member and tensioning means connected to the lower end of said screw member to maintain said screw member in tension between the upper and lower support means for all load conditions of the system, said tensioning means including a resilient block member mounted coaxially with said screw member and engaging the under side of said bracket, and nut means threaded to the lower end of said screw member and engaging the underside of said resilient block; an assembly including a nut member threadably mounted to said screw member; an elevator cab; means coupling said elevator cab to said nut assembly; and drive means coupled to one of the aforesaid members for imparting relative rotational movement between said nut member and said screw member to cause said cab member to move vertically in a linear direction.
Claim 3
Dependent Claim
53 words
The vertical transportation and elevator system defined in claim 1, in which said nut is rotatable on said screw, and said drive means includes an electric motor mounted on said cab, and mechanical means coupling said motor to said nut so as to enable said motor to impart rotational movement to said nut.
Claim 4
Dependent Claim
25 words
The vertical transportation and elevator system defined in claim 2, and which includes a magnetic brake in said assembly for releasably engaging said nut member.
Claim 5
Dependent Claim
30 words
The vertical transporation and elevator system defined in claim 1, in which said upper support means includes a universal joint assembly mounted at the upper end of said supporting frame.
Claim 6
Dependent Claim
30 words
The vertical transportation and elevator system defined in claim 4, in which said lower support means includes a further universal joint assembly mounted at the lower end of said frame.
Claim 7
Dependent Claim
47 words
The vertical transportation and elevator system defined in claim 1, and which includes a key member intercoupling said lower support means and said screw member for preventing rotation of said screw member but permitting a measure of linear movement of the lower end of said screw member.
Claim 8
Dependent Claim
261 words
A vertical transportation and elevator system including: a vertical supporting frame having an upper end and a lower end; an elongated screw member; mounting means for suspending the elongated screw member in a vertical position on said supporting frame, said mounting means including an upper support means mounted at the upper end of said supporting frame and affixed to the upper end of said eloNgated screw member, said upper support means including a universal joint assembly mounted at the upper end of said supporting frame, and a lower support means mounted at the lower end of said supporting frame for receiving the lower end of said screw member, said lower support means including a further universal joint assembly mounted at the lower end of said frame, the lower end of said screw member being free to move in a vertical linear direction, said lower support means including tensioning means connected to the lower end of said screw member to maintain said screw member in tension between the upper and lower support means for all load conditions of the system; dampeners coupled to said universal joint assembly of said upper support means and to said universal joint assembly of said lower support means; an assembly including a nut member threadably mounted to said screw member; an elevator cab; means coupling said elevator cab to said nut assembly; and drive means coupled to one of the aforesaid members for imparting relative rotational movement between said nut member and said screw member to cause said cab member to move vertically in a linear direction.
Claim 9
Dependent Claim
261 words
A vertical transportation and elevator system including: a vertical supporting frame having an upper end and a lower end; an elongated screw member; mounting means for suspending the elongated screw member in a vertical position on said supporting frame, said mounting means including an upper support means mounted at the upper end of said supporting frame and affixed to the upper end of said eloNgated screw member, said upper support means including a universal joint assembly mounted at the upper end of said supporting frame, and a lower support means mounted at the lower end of said supporting frame for receiving the lower end of said screw member, said lower support means including a further universal joint assembly mounted at the lower end of said frame, the lower end of said screw member being free to move in a vertical linear direction, said lower support means including tensioning means connected to the lower end of said screw member to maintain said screw member in tension between the upper and lower support means for all load conditions of the system; dampeners coupled to said universal joint assembly of said upper support means and to said universal joint assembly of said lower support means; an assembly including a nut member threadably mounted to said screw member; an elevator cab; means coupling said elevator cab to said nut assembly; and drive means coupled to one of the aforesaid members for imparting relative rotational movement between said nut member and said screw member to cause said cab member to move vertically in a linear direction.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |