US3980341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breaking up of concrete surface layers or the like
Assignee: National Research Development Corp UK
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Filing: 1974-03-14
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Granted: 1976-09-14
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Expires: 1994-03-14
Abstract
Abstract An apparatus for breaking concrete surface layers, masonry walls, or like planar constructions, includes two foot members for engaging one surface of the construction at positions spaced apart from one another along a free edge of the construction, and a third member disposed so as to lie on the other side of the construction at a position substantially equally spaced from each of the foot members. An expansion device cuts between a body portion of the apparatus and the free end of the third member and operates to bring the three members into or out of gripping relationship with the construction with the third member furthest from the free edge of the construction. The first member is then moved relatively to the foot members, e.g. by tilting the apparatus, and this exerts a breaking moment on the constructions. Free standing and excavator-mounted versions of the apparatus are described in detail.
Inventors
- 👤 Ahmed Asim Bilgin Musannif
- 👤 Joseph Folkard Eden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:24
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/965; B; B28; B28D; B28D1/00; B28D1/22; B28D1/222; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/122; E04; E04G; E04G23/00; E04G23/08; E04G23/082; E04G2023/086; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/371
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
112 words
Apparatus for breaking a concrete surface masonry wall or like planar construction comprising a rigid member, said rigid member having a body portion adapted to be positioned adjacent a free edge of the construction, said rigid member having a gripping portion remote from said body portion for engaging one major face of said construction, gripping means for gripping the other major face of the construction at a greater distance from said body portion of said rigid member than the distance between said gripping portion and said body portion, said gripping means being pivotally mounted to said rigid member and expansion means for pivoting said rigid member to effect breaking of the construction.
Claim 2
Dependent Claim
112 words
Apparatus for breaking a concrete surface masonry wall or like planar construction comprising a rigid member, said rigid member having a body portion adapted to be positioned adjacent a free edge of the construction, said rigid member having a gripping portion remote from said body portion for engaging one major face of said construction, gripping means for gripping the other major face of the construction at a greater distance from said body portion of said rigid member than the distance between said gripping portion and said body portion, said gripping means being pivotally mounted to said rigid member and expansion means for pivoting said rigid member to effect breaking of the construction.
Claim 3
Dependent Claim
17 words
An apparatus as claimed in claim 1 wherein the expansion means is provided by a ram device.
Claim 4
Dependent Claim
23 words
An apparatus as claimed in claim 1 including means for moving the said other gripping portion towards or away from said body portion.
Claim 5
Dependent Claim
90 words
An apparatus as claimed in claim 1 and for use when the planar construction is horizontally disposed, or approximately so, wherein the rigid member is one of two such members having gripping portions adapted to engage the undersurface of the construction at positions spaced apart from one another along the free edge of the construction, and said other gripping portion is disposed so as to lie on the other side of the construction at a position substantially equally spaced from each of the said gripping portions of said rigid members.
Claim 6
Dependent Claim
35 words
A system for use in breaking up concrete surface layers, masonry walls, or like planar construction, the system including an apparatus as claimed in claim 1 in combination with a crane, excavator, or fork-lift truck.
Claim 7
Dependent Claim
54 words
A system as claimed in claim 5 wherein the apparatus includes a hydraulic ram as the expansion means and the supporting means is at least in part hydraulically actuated, and the system includes duct means for transmission of operating fluid for said hydraulic ram to or from the hydraulic system for the supporting means.
Claim 8
Dependent Claim
163 words
For use in breaking a concrete surface layer, masonry wall or like planar construction, an apparatus comprising a rigid member, a body to said rigid member for location adjacent a free edge of the construction, a gripping portion to said rigid member remote from the body portion and for location adjacent one major face of said construction, another gripping portion remote from the body portion and for location adjacent the other major face of the construction, said other gripping portion being movable to a position that is at a greater distance from the body portion of the apparatus than the distance between the gripping portion of said rigid member and the body portion of the apparatus, an expansion means, and a pivotal connection connecting the expansion means to the remainder of the apparatus, said pivotal connection being fixed relative to said other gripping portion, actuation of the expansion means in operation of the apparatus being effective to urge said gripping portions closer together.
Claim 9
Dependent Claim
163 words
For use in breaking a concrete surface layer, masonry wall or like planar construction, an apparatus comprising a rigid member, a body to said rigid member for location adjacent a free edge of the construction, a gripping portion to said rigid member remote from the body portion and for location adjacent one major face of said construction, another gripping portion remote from the body portion and for location adjacent the other major face of the construction, said other gripping portion being movable to a position that is at a greater distance from the body portion of the apparatus than the distance between the gripping portion of said rigid member and the body portion of the apparatus, an expansion means, and a pivotal connection connecting the expansion means to the remainder of the apparatus, said pivotal connection being fixed relative to said other gripping portion, actuation of the expansion means in operation of the apparatus being effective to urge said gripping portions closer together.
Claim 10
Dependent Claim
181 words
Apparatus for breaking concrete slabs or like planar constructions comprising: a rigid member adapted to be positioned adjacent a free edge of said slab, said rigid member having a body portion and a first gripping member, first pivoting means for pivoting said rigid member, said first gripping member being remote from said body portion and adapted to be positioned in contact with one face of said slab, a second gripping member pivotally mounted to said rigid member remote from said body portion, second pivoting means for pivoting said second gripping member, said second gripping member further including expansion means for expanding and contracting the length of said second gripping means in contact with the opposite face of said slab, said first and said second gripping members being positioned with respect to each other such that when each of said first and second gripping members contacts opposite faces of said slab the distance between the point of contact on the face and the free edge of said slab, respectively, is unequal thereby causing a bending moment when said rigid member is pivoted.
Claim 11
Dependent Claim
181 words
Apparatus for breaking concrete slabs or like planar constructions comprising: a rigid member adapted to be positioned adjacent a free edge of said slab, said rigid member having a body portion and a first gripping member, first pivoting means for pivoting said rigid member, said first gripping member being remote from said body portion and adapted to be positioned in contact with one face of said slab, a second gripping member pivotally mounted to said rigid member remote from said body portion, second pivoting means for pivoting said second gripping member, said second gripping member further including expansion means for expanding and contracting the length of said second gripping means in contact with the opposite face of said slab, said first and said second gripping members being positioned with respect to each other such that when each of said first and second gripping members contacts opposite faces of said slab the distance between the point of contact on the face and the free edge of said slab, respectively, is unequal thereby causing a bending moment when said rigid member is pivoted.
Claim 12
Dependent Claim
117 words
Apparatus for breaking a concrete surface masonry wall or like planar construction comprising positioning means for adjustably positioning said apparatus, a rigid member pivotally attached to said positioning means, said rigid member having a body portion for location adjacent a free edge of the construction, said rigid member having a gripping portion remote from said body portion for engaging one major face of said construction, gripping means for gripping the other major face of the construction at a greater distance from said body portion of said rigid member than the distance between said gripping portion and said body portion, said gripping means being pivotally mounted to said rigid member and expansion means for pivoting said rigid member.
Claim 13
Dependent Claim
117 words
Apparatus for breaking a concrete surface masonry wall or like planar construction comprising positioning means for adjustably positioning said apparatus, a rigid member pivotally attached to said positioning means, said rigid member having a body portion for location adjacent a free edge of the construction, said rigid member having a gripping portion remote from said body portion for engaging one major face of said construction, gripping means for gripping the other major face of the construction at a greater distance from said body portion of said rigid member than the distance between said gripping portion and said body portion, said gripping means being pivotally mounted to said rigid member and expansion means for pivoting said rigid member.
Claim 14
Dependent Claim
176 words
Apparatus for breaking concrete slabs or like planar constructions comprising: a positioning means for adjustably positioning said apparatus, a rigid member pivotally mounted to said positioning means so as to be positionable adjacent a free edge of said slab by said positioning means, said rigid member having a body portion gripping member, first pivoting means for pivoting said rigid member, said first gripping member being remote from said body portion and adapted to be positioned in contact with one major face of said slab, gripping means pivotally mounted to said rigid member remote from said body portion, for gripping the other major face of the slab, second pivoting means for pivoting said gripping means, said gripping member and said gripping means being respectively positioned with respect to each other on the two major faces of the slab such that the distance between the point of contact of said gripping member and said gripping means on the major faces and the free edge thereof is unequal, thereby causing a bending moment when said rigid member is pivoted.
Claim 15
Dependent Claim
176 words
Apparatus for breaking concrete slabs or like planar constructions comprising: a positioning means for adjustably positioning said apparatus, a rigid member pivotally mounted to said positioning means so as to be positionable adjacent a free edge of said slab by said positioning means, said rigid member having a body portion gripping member, first pivoting means for pivoting said rigid member, said first gripping member being remote from said body portion and adapted to be positioned in contact with one major face of said slab, gripping means pivotally mounted to said rigid member remote from said body portion, for gripping the other major face of the slab, second pivoting means for pivoting said gripping means, said gripping member and said gripping means being respectively positioned with respect to each other on the two major faces of the slab such that the distance between the point of contact of said gripping member and said gripping means on the major faces and the free edge thereof is unequal, thereby causing a bending moment when said rigid member is pivoted.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |