US4245441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping aerial lift
Assignee: Individual
•
Filing: 1979-03-19
•
Granted: 1981-01-20
•
Expires: 1999-03-19
Abstract
Abstract An aerial lift is described which has a pivotable boom with a load end and a pivot end. The boom is constructed such that, as the pivot end of the boom pivots upwardly, the load end is raised substantially vertically. In one embodiment, the boom is mounted on a telescoping scaffold to provide the boom with a greater reaching range. In another embodiment, the boom itself is provided with telescoping members to extend its vertical reach.
Inventors
- 👤 Raymond E. Smith, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:31
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/044; B66F11/046; B66F11/042
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
An aerial lift, comprising: supporting means; first and second pivotable scissors members having lower ends and upper ends; means for pivotally mounting the lower ends of said scissors members to said supporting means; a boom having an extensible load end and a pivot end pivotally coupled to the upper end of said first scissors member; a support arm extending between and pivotally connected to the upper end of the second scissors member and said boom; means rigidly coupling said support arm to the extensible portion of said boom; means for pivoting and extending said scissors members and for raising said boom such that, as said boom is raised, said support arm pivots about the upper end of said second scissors member and said boom and said means coupling said support arm to the extensible portion of said boom causes said extensible portion to extend for raising the load end substantially vertically.
Claim 2
Dependent Claim
151 words
An aerial lift, comprising: supporting means; first and second pivotable scissors members having lower ends and upper ends; means for pivotally mounting the lower ends of said scissors members to said supporting means; a boom having an extensible load end and a pivot end pivotally coupled to the upper end of said first scissors member; a support arm extending between and pivotally connected to the upper end of the second scissors member and said boom; means rigidly coupling said support arm to the extensible portion of said boom; means for pivoting and extending said scissors members and for raising said boom such that, as said boom is raised, said support arm pivots about the upper end of said second scissors member and said boom and said means coupling said support arm to the extensible portion of said boom causes said extensible portion to extend for raising the load end substantially vertically.
Claim 3
Dependent Claim
69 words
An aerial lift as set forth in claim 1 wherein said means rigidly coupling said support arm to the extensible portion of said boom includes an extension of said support arm extending beyond said boom, and a telescoping cylinder connected between said support arm extension and the extensible portion of the boom for further extending the extensible portion of the boom independently of the pivoting of said support arm.
Claim 4
Dependent Claim
21 words
An aerial lift as set forth in claim 1 further including means for rotating said boom about a substantially vertical axis.
Claim 5
Dependent Claim
21 words
An aerial lift as set forth in claim 1 wherein said first and second scissors members are each adapted to telescope.
Claim 6
Dependent Claim
55 words
An aerial lift as set forth in claim 4 wherein said means for extending said scissors members and for raising said boom includes a first telescoping cylinder coupled between the pivot end of said boom and the first scissors member and a second telescoping cylinder coupled between said support arm and said second scissors member.
Claim 7
Dependent Claim
71 words
An aerial lift as set forth in claim 4 wherein said first and second scissors members each include a shaft section telescoping with a sleeve section, and further including link arms interconnecting the shaft section of each scissors member to the sleeve section of the other scissors member such that, as said scissors members pivot, the link arms cause the sleeve sections to telescope with respect to their mating shaft sections.
Claim 8
Dependent Claim
84 words
An aerial lift as set forth in claim 1 wherein the boom includes a lower section terminating in the pivot end, an intermediate section telescoping with the lower section, and an upper section telescoping with the intermediate section, wherein said means rigidly coupling the support arm to the extensible portion of the boom is coupled between the support arm and the intermediate section of the boom, and further including means for extending the upper section of the boom as the intermediate section is extended.
Claim 9
Dependent Claim
54 words
An aerial lift as set forth in claim 7 wherein said means rigidly coupling the support arm to the intermediate section of the boom includes an extension of said support arm extending beyond the lower section of said boom, and means connected between said support arm extension and the intermediate section of the boom.
Claim 10
Dependent Claim
46 words
An aerial lift as set forth in claim 8 wherein said means connected between the support arm extension and the intermediate section of the boom includes an extensible cylinder for further extending the intermediate section of the boom independently of the pivoting of said support arm.
Claim 11
Dependent Claim
21 words
An aerial lift as set forth in claim 8 wherein said first and second scissors members are each adapted to telescope.
Claim 12
Dependent Claim
71 words
An aerial lift as set forth in claim 10 wherein said first and second scissors member each include a shaft section telescoping with a sleeve section, and further including link arms interconnecting the shaft section of each scissors member to the sleeve section of the other scissors member such that, as said scissors members pivot, the link arms cause the sleeve sections to telescope with respect to their mating shaft sections.
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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |