US3753468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive arrangement for telescopically arranged elements
Assignee: Individual
•
Filing: 1972-03-13
•
Granted: 1973-08-21
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Expires: 1992-03-13
Abstract
Abstract The invention relates to a drive arrangement for elements telescopically received one within the other. At least three telescopic elements are required, the intermediate one functioning as a movable pulley wheel for a fixed length cable means fixedly attached at opposite ends thereof to the outer and the inner elements respectively.
Inventors
- 👤 B Casagrande
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:41
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/14; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/306; E02F3/36; E02F3/40; E02F3/413; E02F3/4136
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A telescopic column comprising at least one group of three coaxial memberS telescopically arranged one within the other, said group comprising an outer, an intermediate and an inner member, the intermediate one of said members being axially slidable within the outer one of said members and the inner one of said members being axially slidable within the intermediate one of said members, a cable means comprising a fixed length cable fixedly attached to the outer and inner ones of said members, respectively, the intermediate one of said members constituting a movable pulley wheel means for said cable, whereby the inner one of said members is constrained to travel axially relative to the outer member double the distance of the intermediate member pursuant to the intermediate member being moved axially relative to the outer member.
Claim 2
Dependent Claim
134 words
A telescopic column comprising at least one group of three coaxial memberS telescopically arranged one within the other, said group comprising an outer, an intermediate and an inner member, the intermediate one of said members being axially slidable within the outer one of said members and the inner one of said members being axially slidable within the intermediate one of said members, a cable means comprising a fixed length cable fixedly attached to the outer and inner ones of said members, respectively, the intermediate one of said members constituting a movable pulley wheel means for said cable, whereby the inner one of said members is constrained to travel axially relative to the outer member double the distance of the intermediate member pursuant to the intermediate member being moved axially relative to the outer member.
Claim 3
Dependent Claim
81 words
The column of claim 1, said intermediate member having a cable guide at each of two longitudinally spaced apart points thereon, said cable means comprising respective lengths of said cable fixedly attached to said inner member and extending therefrom in opposite directions to over each of said guides and then to said outer member, said lengths of cable being fixed to said outer member whereby said cable lengths are constant for all telescopic positions of said members relative to each other.
Claim 4
Dependent Claim
20 words
The column of claim 1, including a drive means for driving said intermediate member axially relative to said outer member.
Claim 5
Dependent Claim
20 words
The column of claim 1, including a guidance means for changing the inclination of the telescopic axis relative to earth.
Claim 6
Dependent Claim
24 words
The column of claim 1 applied to an earth boring apparatus and comprising a boring tool attached at one end of said inner member.
References Cited (Backward Citations)
US557482A
Cited
US3517760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |