US4109933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding wheelbarrows
Assignee: Individual
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Filing: 1977-04-12
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Granted: 1978-08-29
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Expires: 1997-04-12
Abstract
Abstract A folding wheelbarrow can be constructed so as to utilize a wheelbarrow body which is adapted to be folded or manipulated from a normal position into a folded position. Such a body is attached to a wheel support serving to carry a normal wheel and handles. In order to achieve a satisfactory folding action each such body is constructed so as to have a bottom wall including at least two bottom panels, a front wall having at least two front wall panels and sides connected by the bottom wall panel and the front wall panel. A plurality of separate linkage hinges connect the bottom and front wall panels and the sides so as to permit Sarrus-type motion of the panels and the sides during manipulation of the body from a normal position into a folded position. A latch or latch-type structure is preferably used to connect at least two parts which pivot relative to one another during such folding so as to hold the body in its normal position.
Inventors
- 👤 Edward D. O'Brian
- 👤 William M. Plachy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:02
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/18; B62B1/20; B62B1/208
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
309 words
A wheelbarrow having a body, a wheel support, a wheel and handle means, said body including a bottom wall having front and rear ends and side edges, side walls extending upwardly from said side edges of said bottom wall, a front wall extending upwardly from said front end of said bottom wall and extending between said side walls, said wheel support being attached to said body so as to extend to the front of said body, said wheel being rotatably mounted on said wheel support, said handle means being attached to said body so as to extend to the rear of said body in which the improvement comprises: said bottom wall including at least two identical bottom wall panels having adjacent edges which are located next to one another between said side edges of said bottom wall, said front wall comprising at least two identical front wall panels having adjacent edges located next to one another between said side edges of said front wall, a plurality of separate hinge means connecting said panels of said bottom wall to one another, connecting said panels of said bottom wall to said side walls and connecting said side walls to said panels of said front wall and connecting said panels of said front wall together, said separate hinge means being located with respect to each other and said panels being dimensioned so as to permit Sarrus motion of said panels of said bottom and front walls and said side walls so that said body may be manipulated from a normal position into a folded position in which said side walls are located adjacent to one another, and manually operable latched means for securing parts connected by at least one of said hinge means against folding so as to prevent said body from being folded from said normal position into said folded position.
Claim 2
Dependent Claim
309 words
A wheelbarrow having a body, a wheel support, a wheel and handle means, said body including a bottom wall having front and rear ends and side edges, side walls extending upwardly from said side edges of said bottom wall, a front wall extending upwardly from said front end of said bottom wall and extending between said side walls, said wheel support being attached to said body so as to extend to the front of said body, said wheel being rotatably mounted on said wheel support, said handle means being attached to said body so as to extend to the rear of said body in which the improvement comprises: said bottom wall including at least two identical bottom wall panels having adjacent edges which are located next to one another between said side edges of said bottom wall, said front wall comprising at least two identical front wall panels having adjacent edges located next to one another between said side edges of said front wall, a plurality of separate hinge means connecting said panels of said bottom wall to one another, connecting said panels of said bottom wall to said side walls and connecting said side walls to said panels of said front wall and connecting said panels of said front wall together, said separate hinge means being located with respect to each other and said panels being dimensioned so as to permit Sarrus motion of said panels of said bottom and front walls and said side walls so that said body may be manipulated from a normal position into a folded position in which said side walls are located adjacent to one another, and manually operable latched means for securing parts connected by at least one of said hinge means against folding so as to prevent said body from being folded from said normal position into said folded position.
Claim 3
Dependent Claim
49 words
A wheelbarrow as claimed in claim 1 wherein: said bottom wall includes a connecting bottom wall panel and two other bottom wall panels, said connecting bottom wall panel being located between and in edge-to-edge relationship with said other bottom wall panels when said body is in said normal position.
Claim 4
Dependent Claim
27 words
A wheelbarrow as claimed in claim 2 wherein: said wheel support is secured to said connecting wall panel so as to extend therefrom beneath said front wall.
Claim 5
Dependent Claim
22 words
A wheelbarrow as claimed in claim 3 wherein: said handle means comprises handles attached to said side so as to extend therefrom.
Claim 6
Dependent Claim
86 words
A wheelbarrow as claimed in claim 4 wherein: said latch means includes a cross-bar pivotally mounted on said connecting bottom wall panel and retainers on parts of said body remote from said connecting wall panel, said retainers being located in positions in which they are capable of being engaged by said cross-bar when said body is in said normal position, said cross-bar being capable of being rotated out of engagement with said retainer so as to permit said body to be manipulated into said folded position.
Claim 7
Dependent Claim
176 words
A wheelbarrow as claimed in claim 1 wherein: said bottom wall includes a connecting bottom wall panel and two other bottom wall panels, said connecting bottom wall panel being located between and in edge-to-edge relationship with said other bottom wall panels when said body is in said normal position, said wheel support is secured to said connecting wall panel so as to extend therefrom beneath said front wall, said handle means comprise handles attached to said sides so as to extend therefrom, legs attached to said side walls so as to fold therewith, and said latch means includes a cross-bar pivotally mounted on said connecting bottom wall panel and retainers on said other bottom wall panels, said retainers being located in positions in which they are capable of being engaged by said cross-bar when said cross-bar is rotated so as to extend from said bottom wall panel, said cross-bar being capable of being rotated out of engagement with said retainers into a position in which said cross-bar extends along and adjacent to said connecting wall panel.
Claim 8
Dependent Claim
67 words
A wheelbarrow as claimed in claim 1 wherein: said handle means comprise two elongated members which extend along said bottom wall panels from adjacent to the front of said body to the rear of said body, a handle hinge means connecting each of said elongated members to one of said bottom wall panels, wheel support hinge means connecting each of said elongated members to said wheel support.
Claim 9
Dependent Claim
55 words
A wheelbarrow as claimed in claim 7 wherein: said latch means comprise toggle means extending between said members, said toggle means serving to hold said member separate and apart to prevent folding of said body from said normal position into said folded position and being capable of being manipulated so as to permit such folding.
Claim 10
Dependent Claim
80 words
A wheelbarrow as claimed in claim 8 wherein: said toggle means comprise two elongated links having adjacent ends pivotally connected to one another and having remote ends, each of which is pivotally connected to one of said elongated members, said links being connected to said members and to one another so as to pass through an overcenter position in which an outward force is exerted on said members during actuation of said toggle means for securing said parts against folding.
Claim 11
Dependent Claim
255 words
A wheelbarrow as claimed in claim 1 wherein: said handle means comprise two elongated members which extend along said bottom wall panels from adjacent to the front of said body to the rear of said body, a handle hinge means connecting each of said elongated members to one of said bottom wall panels, wheel support hinge means connecting each of said elongated members to said wheel support, and thereafter said wheel support being unattached to said body except as connected to said body through said elongated members, said bottom wall comprises two bottom wall panels, said latch means comprise toggle means extending between said members, said toggle means serving to hold said member separate and apart to prevent folding of said body from said normal position into said folded position and being capable of being manipulated so as to permit such folding, said toggle means comprise two elongated links having adjacent ends pivotally connected to one another and having remote ends, each of which is pivotally connected to one of said elongated members, said links being connected to said members and to one another so as to pass through an overcenter position in which an outward force is exerted on said members during actuation of said toggle means for securing said parts against folding, said links are pivotally connected together and to said members by hinges having parallel axes which are parallel to the axes of said handle hinge means, and including leg means attached to each of said members so as to extend therefrom.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |