Patent US3885688A successfully refreshed from Google Patents.
US3885688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for laying flagstones
Assignee: Individual
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Filing: 1972-09-01
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Granted: 1975-05-27
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Expires: 1992-09-01
Abstract
Abstract A device for laying of flagstones forming a double-armed lever structure carried by wheels forming the tilting axis, the one arm carrying a pair of tongs for carrying a flagstone in horizontal position and releasing the same by hitting a firm object, the other arm being provided with handles for operating the device. The lever structure comprising a beam carrying the pair of tongs and pivotally connected to a main frame carrying the supporting wheels and handles, spring means for lifting the beam when unloaded, and hydraulic means for manually controlling the movements of the beam.
Inventors
- 👤 Albert Johannes Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:05
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/52; E01C19/526; E01C19/528
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A device for laying of flagstones or the like block-formed paving elements comprising: a double-armed lever structure comprising a main frame being at its front end provided with supporting means adapted for resting on a supporting surface so as to allow tilting of the structure about a transverse axis and at its rear end provided with means for manoeuvring the device by hand or by mechanically driven manoeuvring means; a beam being at its rear end connected to said main frame pivotally about a transverse axis and with its front end extending in front of said supporting means and carrying pivotally about a transverse axis a pair of tongs adapted for temporary carrying a flagstone or the like paving elements in a horizontal position; spring means for lifting the beam in relation to the frame when in unloaded condition; and means for selectively controlling the movement of the beam in relation to the frame.
Claim 2
Independent Claim
154 words
A device for laying of flagstones or the like block-formed paving elements comprising: a double-armed lever structure comprising a main frame being at its front end provided with supporting means adapted for resting on a supporting surface so as to allow tilting of the structure about a transverse axis and at its rear end provided with means for manoeuvring the device by hand or by mechanically driven manoeuvring means; a beam being at its rear end connected to said main frame pivotally about a transverse axis and with its front end extending in front of said supporting means and carrying pivotally about a transverse axis a pair of tongs adapted for temporary carrying a flagstone or the like paving elements in a horizontal position; spring means for lifting the beam in relation to the frame when in unloaded condition; and means for selectively controlling the movement of the beam in relation to the frame.
Claim 3
Dependent Claim
87 words
A device in accordance with claim 1 wherein: said spring means are a helical compression spring pivotally connected to the main frame and the beam in such a way that the axis of the spring in the uppermost position of the beam will be nearly perpendicular to a line drawn from the pivot axis between the beam and the main frame and through the pivot axis between the spring in the lowermost position of the beam will form an acute angle with an extension of said line.
Claim 4
Dependent Claim
61 words
A device in accordance with claim 1 wherein: said means for controlling the relative movement of the beam comprises a double-acting hydraulic cylinder pivotally connected to the beam and the main frame respectively, and whereby the two spaces of the cylinder on both sides of the piston are intercommunicating through a by-pass having a stop-valve to be controlled by the operator.
Claim 5
Independent Claim
200 words
A device for the laying of flagstones, block-formed paving elements, and the like, comprising, in combination, a double-armed lever structure carrying at its front end pivotally about a transverse axis a pair of tongs adapted for temporarily carrying a flagstone or the like in a horizontal position said double-armed lever structure being provided at its rear end with means for manoeuvering the device by hand or by powerdriven manoeuvering means said double-armed lever structure being also provided with supporting means adapted for resting on a supporting surface so as to allow tilting of said structure about a transverse axis. a fitting for suspending the pair of tongs pivotally from said double-armed lever structure including a suspending bolt said fitting being provided with two sets of bores for the suspending bolt arranged perpendicularly to each other in a horizontal plane so as to suspend the pair of tongs either with the arms in the longitudinal direction of the device or perpendicularly to said direction, abutment means connected to said tongs for abutting the top of the said flagstones, blockformed paving elements and the like, whereby the contact betwEen said tongs and said flagstones, block-formed paving elements and like can be varied.
Claim 6
Independent Claim
200 words
A device for the laying of flagstones, block-formed paving elements, and the like, comprising, in combination, a double-armed lever structure carrying at its front end pivotally about a transverse axis a pair of tongs adapted for temporarily carrying a flagstone or the like in a horizontal position said double-armed lever structure being provided at its rear end with means for manoeuvering the device by hand or by powerdriven manoeuvering means said double-armed lever structure being also provided with supporting means adapted for resting on a supporting surface so as to allow tilting of said structure about a transverse axis. a fitting for suspending the pair of tongs pivotally from said double-armed lever structure including a suspending bolt said fitting being provided with two sets of bores for the suspending bolt arranged perpendicularly to each other in a horizontal plane so as to suspend the pair of tongs either with the arms in the longitudinal direction of the device or perpendicularly to said direction, abutment means connected to said tongs for abutting the top of the said flagstones, blockformed paving elements and the like, whereby the contact betwEen said tongs and said flagstones, block-formed paving elements and like can be varied.
Claim 7
Independent Claim
205 words
A device for the laying of flagstones, block-formed paving elements, and the like, comprising, in combination, a double-armed lever structure carrying at its front end pivotally about a transverse axis a pair of tongs adapted for temporarily carrying a flagstone or the like in a horizontal position said double-armed lever structure being provided at its rear end and with means for manoeuvering the device by hand or by power-driven manoeuvering means said double-armed lever structure being also provided with supporting means adapted for resting on a supporting surface so as to allow tilting of said structure about a transverse axis said pair of tongs being carried by a vertically extending circular rod which at its top end terminates in a protruding flange with a square outline said rod being inserted in a corresponding cylindrical bore in the bottom of a U-formed fitting, the ascending legs of which are arranged for the pivotal mounting of the pair of tongs on the double-armed lever structure and whereby the U-formed fitting is provided with vertical abutment surfaces for at least two opposite sides of said square flange which when lifted over these abutment surface together with the pair of tongs may be freely rotatable about its longitudinal axis.
Claim 8
Independent Claim
205 words
A device for the laying of flagstones, block-formed paving elements, and the like, comprising, in combination, a double-armed lever structure carrying at its front end pivotally about a transverse axis a pair of tongs adapted for temporarily carrying a flagstone or the like in a horizontal position said double-armed lever structure being provided at its rear end and with means for manoeuvering the device by hand or by power-driven manoeuvering means said double-armed lever structure being also provided with supporting means adapted for resting on a supporting surface so as to allow tilting of said structure about a transverse axis said pair of tongs being carried by a vertically extending circular rod which at its top end terminates in a protruding flange with a square outline said rod being inserted in a corresponding cylindrical bore in the bottom of a U-formed fitting, the ascending legs of which are arranged for the pivotal mounting of the pair of tongs on the double-armed lever structure and whereby the U-formed fitting is provided with vertical abutment surfaces for at least two opposite sides of said square flange which when lifted over these abutment surface together with the pair of tongs may be freely rotatable about its longitudinal axis.
Claim 9
Independent Claim
225 words
A device for laying of flagstones or the like block-formed paving elements comprising: a double-armed lever structure including a main frame being at its front end provided wth supporting means adapted for resting on a supporting surface so as to allow tilting of the structure about a transverse axis and at its rear end provided with means for maneuvering the device by hand or by mechanically driven maneuvering means; a beam being at its rear end connected to said main frame pivotally about a transverse axis and with its front end extending in front of said supporting means and carrying pivotally about a transverse axis a pair of tongs adapted for temporary carrying a flagstone or the like paving elements in a horizontal position; abutment means connected to said tongs for abutting the top of the said flagstones or block-formed paving elements and the like, whereby the contact between the said tongs and said flagstones or block-formed paving elements and the like can be varied; a depending rod being at its upper end pivotally connected to the beam; said rod being at its lower end provided with supporting legs for the device; and the intermediate part of said rod being slidably guided by guiding means secured to the main frame; and means for selectively controlling the movement of the beam in relation to the frame.
Claim 10
Independent Claim
225 words
A device for laying of flagstones or the like block-formed paving elements comprising: a double-armed lever structure including a main frame being at its front end provided wth supporting means adapted for resting on a supporting surface so as to allow tilting of the structure about a transverse axis and at its rear end provided with means for maneuvering the device by hand or by mechanically driven maneuvering means; a beam being at its rear end connected to said main frame pivotally about a transverse axis and with its front end extending in front of said supporting means and carrying pivotally about a transverse axis a pair of tongs adapted for temporary carrying a flagstone or the like paving elements in a horizontal position; abutment means connected to said tongs for abutting the top of the said flagstones or block-formed paving elements and the like, whereby the contact between the said tongs and said flagstones or block-formed paving elements and the like can be varied; a depending rod being at its upper end pivotally connected to the beam; said rod being at its lower end provided with supporting legs for the device; and the intermediate part of said rod being slidably guided by guiding means secured to the main frame; and means for selectively controlling the movement of the beam in relation to the frame.
Claim 11
Dependent Claim
49 words
A device in accordance with claim 5, together with abutment means provided on the jaws for abutting the top of a flagstone etc. as previously laid and operable to cause the release of another flagstone or the like from a level which is a small distance above the ground.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |