US3744758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lever and fulcrum combination
Assignee: Individual
•
Filing: 1970-12-01
•
Granted: 1973-07-10
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Expires: 1990-12-01
Abstract
Abstract This invention is for special fulrum means for crowbars and the like. The fulcrum comprises ring-like means which slide onto and along the shaft of a crowbar so that the fulcrum can be useful at either end of the crowbar.
Inventors
- 👤 H Nakasone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:02
CPC Classifications
B; B65; B65G; B65G7/00; B65G7/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
In a lever and fulcrum combination wherein the lever has a stem having an elongated axis with working ends, and the fulcrum has a body looped loosely about the stem which allows the fulcrum to be shifted along the stem, the fulcrum body having first and second round cross sections on opposite sides of the stem and on a plane including a longitudinal axis of the stem of material thickness which functions well as a fulcrum, wherein the fulcrum has a round edge enlarged bottom plate of material area so as not to damage a surface against which it may be pressed.
Claim 2
Dependent Claim
102 words
In a lever and fulcrum combination wherein the lever has a stem having an elongated axis with working ends, and the fulcrum has a body looped loosely about the stem which allows the fulcrum to be shifted along the stem, the fulcrum body having first and second round cross sections on opposite sides of the stem and on a plane including a longitudinal axis of the stem of material thickness which functions well as a fulcrum, wherein the fulcrum has a round edge enlarged bottom plate of material area so as not to damage a surface against which it may be pressed.
Claim 3
Dependent Claim
96 words
In a lever and fulcrum combination wherein the lever has a stem having an elongated axis with working ends, and the fulcrum has a body looped loosely about the stem which allows the fulcrum to be shifted along the stem, the fulcrum body having first and second round cross sections on opposite sides of the stem and on a plane including a longitudinal axis of the stem of material thickness which functions well as a fulcrum, and wherein the fulcrum has a gap for passing over one of the working ends which is a flat crowfoot.
Claim 4
Dependent Claim
96 words
In a lever and fulcrum combination wherein the lever has a stem having an elongated axis with working ends, and the fulcrum has a body looped loosely about the stem which allows the fulcrum to be shifted along the stem, the fulcrum body having first and second round cross sections on opposite sides of the stem and on a plane including a longitudinal axis of the stem of material thickness which functions well as a fulcrum, and wherein the fulcrum has a gap for passing over one of the working ends which is a flat crowfoot.
Claim 5
Dependent Claim
136 words
In a lever and fulcrum combination wherein the lever has a stem having an elongated axis with working ends, and the fulcrum has a body looped loosely about the stem which allows the fulcrum to be shifted along the stem, the fulcrum body having first and second round cross sections on opposite sides of the stem and on a plane including a longitudinal axis of the stem of material thickness which functions well as a fulcrum, wherein the working ends are flattened and widened, and wherein the fulcrum comprises a first fulcrum permanently mounted on the stem, and further comprising a second fulcrum having a similar cross section and having a gap opening whereby the second fulcrum may be slid over one of the working ends with a flattened and widened portion thereof in the gap.
Claim 6
Dependent Claim
136 words
In a lever and fulcrum combination wherein the lever has a stem having an elongated axis with working ends, and the fulcrum has a body looped loosely about the stem which allows the fulcrum to be shifted along the stem, the fulcrum body having first and second round cross sections on opposite sides of the stem and on a plane including a longitudinal axis of the stem of material thickness which functions well as a fulcrum, wherein the working ends are flattened and widened, and wherein the fulcrum comprises a first fulcrum permanently mounted on the stem, and further comprising a second fulcrum having a similar cross section and having a gap opening whereby the second fulcrum may be slid over one of the working ends with a flattened and widened portion thereof in the gap.
Claim 7
Dependent Claim
44 words
The combination recited in claim 1 wherein the fulcrum has an opening gap in a side so that the opening can be a passage for a portion of the lever so that the fulcrum can be easily put onto the lever and removed therefrom.
Claim 8
Dependent Claim
46 words
The lever and fulcrum combination recited in claim 1 wherein the fulcrum has a uniform cross section. 6. The lever and fulcrum combination recited in claim 3 wherein the second fulcrum has a cross section which is larger than a cross section of the first fulcrum.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |