Patent US4818057A successfully refreshed from Google Patents.
US4030700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually operated log breaking device
Assignee: Individual
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Filing: 1976-07-19
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Granted: 1977-06-21
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Expires: 1996-07-19
Abstract
Abstract A manually operated log breaking device with a longitudinally extending lever member having a first pressure plate attached at one end portion and a second pressure plate attached to the first pressure plate in a hinged relationship, two sets of lever members extending from the first and second pressure plates in a hinged relationship to same and at the free end portions joined in a hinged relationship to a third set of lever members, having a third pressure plate attached in a hinged relationship at the free end portion of the third set of lever members, the pressure plates and lever members coacting as a link or gear system for increasing the resulting power of a manual force applied to the free end portion of the longitudinally extending lever member.
Inventors
- 👤 Victor A. Dushku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:43
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/099
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A manually operated mechanical log breaking device comprising a longitudinally extending lever member; a first pressure plate extending from one end portion of said lever member; a second pressure plate joined to said first pressure plate in a hinged relationship; a third pressure plate; a link system interconnecting said third plate and said first and second plates with said third plate spaced from said first and second plates, said link system comprising an axle and three lever members, one end of each of said members being hingedly connected to said axle, said members extending from said axle and being hingedly connected to said first, second and third pressure plates respectively.
Claim 2
Dependent Claim
110 words
A manually operated mechanical log breaking device comprising a longitudinally extending lever member; a first pressure plate extending from one end portion of said lever member; a second pressure plate joined to said first pressure plate in a hinged relationship; a third pressure plate; a link system interconnecting said third plate and said first and second plates with said third plate spaced from said first and second plates, said link system comprising an axle and three lever members, one end of each of said members being hingedly connected to said axle, said members extending from said axle and being hingedly connected to said first, second and third pressure plates respectively.
Claim 3
Dependent Claim
29 words
A manually operated mechanical log breaking device according to claim 1 wherein each of said lever members includes a plurality of corresponding levers arranged in parallel to each other.
Claim 4
Dependent Claim
27 words
A manually operated mechanical log breaking device according to claim 1 wherein said first pressure plate is arranged at an angle to the manually operated lever member.
Claim 5
Dependent Claim
48 words
A manually operated mechanical log breaking device according to claim 1 wherein the manually operated lever member is arranged with a number of elongated openings the length of said openings increasing from the lever's junction with the first pressure plate towards the point of the manually applied force.
Claim 6
Dependent Claim
139 words
A manually operated mechanical log breaking device comprising a longitudinally extending lever member; a first pressure plate extending from one end portion of said lever member; a second pressure plate joined to said first pressure plate in a hinged relationship; a third pressure plate; a link system interconnecting said third plate and said first and second plates with said third plate spaced from said first and second plates, said link system comprising three sets of lever members joined together at one end portion and extending from the joining point to said first, second and third pressure plates respectively, said third pressure plate being fixed by means of at least one resilient member at a predetermined angle and distance from the first and second pressure plates when said first and second pressure plates are arranged in line with each other.
Claim 7
Dependent Claim
139 words
A manually operated mechanical log breaking device comprising a longitudinally extending lever member; a first pressure plate extending from one end portion of said lever member; a second pressure plate joined to said first pressure plate in a hinged relationship; a third pressure plate; a link system interconnecting said third plate and said first and second plates with said third plate spaced from said first and second plates, said link system comprising three sets of lever members joined together at one end portion and extending from the joining point to said first, second and third pressure plates respectively, said third pressure plate being fixed by means of at least one resilient member at a predetermined angle and distance from the first and second pressure plates when said first and second pressure plates are arranged in line with each other.
Claim 8
Dependent Claim
120 words
A manually operated mechanical log breaking device comprising a longitudinally extending lever member; a first pressure plate extending from one end portion of said lever member; a second pressure plate joined to said first pressure plate in a hinged relationship; a third pressure plate; a link system interconnecting said third plate and said first and second plates with said third plate spaced from said first and second plates, said link system comprising three sets of lever members joined together at one end portion and extending from the joining point to said first, second and third pressure plates respectively, said pressure plates being provided with outwardly extending means from the contact surfaces of the pressure plates for increasing the frictional contact.
Claim 9
Dependent Claim
120 words
A manually operated mechanical log breaking device comprising a longitudinally extending lever member; a first pressure plate extending from one end portion of said lever member; a second pressure plate joined to said first pressure plate in a hinged relationship; a third pressure plate; a link system interconnecting said third plate and said first and second plates with said third plate spaced from said first and second plates, said link system comprising three sets of lever members joined together at one end portion and extending from the joining point to said first, second and third pressure plates respectively, said pressure plates being provided with outwardly extending means from the contact surfaces of the pressure plates for increasing the frictional contact.
Claim 10
Dependent Claim
46 words
A manually operated mechancial log breaking device according to claim 1 and further comprising a locking member to hold the lever members attached to the third pressure plate is a fixed position relative to the second pressure plate when the device is in an actuated position.
Claim 11
Dependent Claim
22 words
A manually operated mechanical log breaking device according to claim 1 wherein said lever members linking the pressure plates together are identical.
References Cited (Backward Citations)
US1380405A
Cited
US3548899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |