US3645501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive jack
Assignee: Individual
•
Filing: 1970-03-23
•
Granted: 1972-02-29
•
Expires: 1990-03-23
Abstract
Abstract A motor drives a threaded rod having a pair of hinged lever arms connected thereto. A pair of hinged lift arms are carried in notches in the terminal edges of the lever arms to increase the lifting capacity of the jack. The hinged lever arms are caused to be moved inwardly and outwardly in response to rotation of the threaded arm while the hinged terminal ends are simultaneously caused to be moved upwardly and downwardly.
Inventors
- 👤 Bryan H Musgrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:25
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/08; B66F3/12; B66F3/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
In an automotive jack of the character described the combination of a rectangular boxlike frame, a threaded driving rod journaled for rotation in said frame, a pair of hingedly connected lever arms carried by respective blocks threadably mounted on said rod, means operable to rotatably drive said rod, said lever arms being operable to be driven inwardly and outwardly in response to rotation of said rod while simultaneously driving said hingedly connected portion of said lever arms upwardly and downwardly, said lever arms including a multiplicity of arcuate notches disposed at an anglE in one of the terminal edges of each of said arms, a pair of hingedly connected lift members having brackets distally disposed at the respective terminal ends opposite said hingedly connecting portion operable to engage preselected respective notches in said arms and be carried by said notches in said arms.
Claim 2
Dependent Claim
143 words
In an automotive jack of the character described the combination of a rectangular boxlike frame, a threaded driving rod journaled for rotation in said frame, a pair of hingedly connected lever arms carried by respective blocks threadably mounted on said rod, means operable to rotatably drive said rod, said lever arms being operable to be driven inwardly and outwardly in response to rotation of said rod while simultaneously driving said hingedly connected portion of said lever arms upwardly and downwardly, said lever arms including a multiplicity of arcuate notches disposed at an anglE in one of the terminal edges of each of said arms, a pair of hingedly connected lift members having brackets distally disposed at the respective terminal ends opposite said hingedly connecting portion operable to engage preselected respective notches in said arms and be carried by said notches in said arms.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |