Patent US3556309A successfully refreshed from Google Patents.
US3556309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shelf constructions
Assignee: HALLOWELL INDUSTRIES Inc
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Filing: 1968-08-05
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Granted: 1971-01-19
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Expires: 1988-08-05
Abstract
Abstract Shelves provided with edge constructions which increase the rigidity and load bearing capability of the shelf. In one embodiment, the two longitudinal edges of the shelf are bent into tubular channels with the free edges returned to the underside of the shelf. In another embodiment, similar to the first, the outermost edges of the tubular channels are of I-beam shape cross section. In a third embodiment, similar to the second, the longitudinal channels are of I-beam shape cross section except that the free edges are not returned to the underside of the shelf.
Inventors
- 👤 Kenneth D Schreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:51
CPC Classifications
A; A47; A47B; A47B96/00; A47B96/02; A47B96/021
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
152 words
A shelf having a main surface and a pair of channels of Ibeam shape cross section formed along the longitudinal edges of said main surface, each of said channels including a first portion bent to extend inward of said shelf from a longitudinal edge of said main surface, a second portion bent to extend from said first portion in a direction normal to the underside of said main surface, a third portion bent to extend outward of said shelf from said second portion, and a fourth portion bent to extend from said third portion inward of said shelf to said second portion and in a direction parallel to said main surface, the juncture of said first and said second portions in contact with and bearing against said underside of said main surface and a said fourth portion in contact with and bearing against the juncture of said second and said third portions.
Claim 2
Dependent Claim
152 words
A shelf having a main surface and a pair of channels of Ibeam shape cross section formed along the longitudinal edges of said main surface, each of said channels including a first portion bent to extend inward of said shelf from a longitudinal edge of said main surface, a second portion bent to extend from said first portion in a direction normal to the underside of said main surface, a third portion bent to extend outward of said shelf from said second portion, and a fourth portion bent to extend from said third portion inward of said shelf to said second portion and in a direction parallel to said main surface, the juncture of said first and said second portions in contact with and bearing against said underside of said main surface and a said fourth portion in contact with and bearing against the juncture of said second and said third portions.
Claim 3
Dependent Claim
51 words
A shelf according to claim 1 wherein said fourth portion of said channel extends inward of said shelf beyond said second portion and is bent to form a fifth portion extending from said fourth portion toward said underside of said main surface in a direction parallel to sa said second portion.
Claim 4
Dependent Claim
25 words
A shelf according to claim 2 wherein said fifth portion of said channel extends to said underside of said main surface and is secured thereto.
Claim 5
Dependent Claim
255 words
A shelf having a main surface; a first paiR of channels bent downwardly from the longitudinal edges of said main surface and further bent to return the free edges thereof to the underside of said main surface to form a pair of tubes along said longitudinal edges of said main surface, each of said channels of said first pair including a first portion bent to extend inward of said shelf from a longitudinal edge of said main surface, a second portion bent to extend from said first portion in a direction normal to said underside of said main surface, a third portion bent to extend outward of said shelf from said second portion, a fourth portion bent to extend from said third portion inward of said shelf to beyond said second portion and in a direction parallel to said main surface, and a fifth portion bent to extend from said fourth portion to said underside of said main surface, the juncture of said first and said second portions in contact with and bearing against said underside of said main surface and said fourth portion in contact with and bearing against the juncture of said second and said third portions; and a second pair of channels of U cross section extending along the transverse edges of said main surface, each of said U-channels having an upper horizontal flange positioned beneath and bearing against the underside of said main surface and a lower horizontal flange positioned beneath and bearing against said fourth portions of said tubular channels.
Claim 6
Dependent Claim
255 words
A shelf having a main surface; a first paiR of channels bent downwardly from the longitudinal edges of said main surface and further bent to return the free edges thereof to the underside of said main surface to form a pair of tubes along said longitudinal edges of said main surface, each of said channels of said first pair including a first portion bent to extend inward of said shelf from a longitudinal edge of said main surface, a second portion bent to extend from said first portion in a direction normal to said underside of said main surface, a third portion bent to extend outward of said shelf from said second portion, a fourth portion bent to extend from said third portion inward of said shelf to beyond said second portion and in a direction parallel to said main surface, and a fifth portion bent to extend from said fourth portion to said underside of said main surface, the juncture of said first and said second portions in contact with and bearing against said underside of said main surface and said fourth portion in contact with and bearing against the juncture of said second and said third portions; and a second pair of channels of U cross section extending along the transverse edges of said main surface, each of said U-channels having an upper horizontal flange positioned beneath and bearing against the underside of said main surface and a lower horizontal flange positioned beneath and bearing against said fourth portions of said tubular channels.
Claim 7
Dependent Claim
164 words
A shelf comprising: a main surface; a pair of tubular channels extending along the longitudinal edges of said main surface and beneath said main surface, each of said tubular channels having a first section of I-beam-shaped cross section and a second section in the form of a wall inward of said first section and extending between the lower flange of said I-beam shaped first section and the underside of said main surface, the upper and lower ends of the web of said I-beam-shaped first section in contact with and bearing against the upper and lower flanges, respectively, of said I-beam-shaped first section: and a second pair of channels of U-shaped cross section extending along the transverse edges of said main surface, each of said U-shaped channels having an upper horizontal flange positioned beneath and bearing against said underside of said main surface and a lower horizontal flange positioned beneath and bearing against the bottom surfaces of said lower flanges of said I-beam-shaped first sections.
Claim 8
Dependent Claim
164 words
A shelf comprising: a main surface; a pair of tubular channels extending along the longitudinal edges of said main surface and beneath said main surface, each of said tubular channels having a first section of I-beam-shaped cross section and a second section in the form of a wall inward of said first section and extending between the lower flange of said I-beam shaped first section and the underside of said main surface, the upper and lower ends of the web of said I-beam-shaped first section in contact with and bearing against the upper and lower flanges, respectively, of said I-beam-shaped first section: and a second pair of channels of U-shaped cross section extending along the transverse edges of said main surface, each of said U-shaped channels having an upper horizontal flange positioned beneath and bearing against said underside of said main surface and a lower horizontal flange positioned beneath and bearing against the bottom surfaces of said lower flanges of said I-beam-shaped first sections.
Claim 9
Dependent Claim
97 words
A shelf comprising: a main surface; and a pair of tubular channels extending along the longitudinal edges of said main surface and beneath said main surface, each of said tubular channels having a first section of I-beam-shaped cross section and a second section in the form of a wall inward of said first section and extending between the upper and lower flanges of said I-beam-shaped first section, the upper and lower ends of the web of said I-beam-shaped first section in contact with and bearing against the upper and lower flanges, respectively, of said I-beam-shaped first section.
Claim 10
Dependent Claim
97 words
A shelf comprising: a main surface; and a pair of tubular channels extending along the longitudinal edges of said main surface and beneath said main surface, each of said tubular channels having a first section of I-beam-shaped cross section and a second section in the form of a wall inward of said first section and extending between the upper and lower flanges of said I-beam-shaped first section, the upper and lower ends of the web of said I-beam-shaped first section in contact with and bearing against the upper and lower flanges, respectively, of said I-beam-shaped first section.
Claim 11
Dependent Claim
39 words
A shelf according to claim 6 wherein each of said second sections of said tubular channels also includes a horizontal portion bent away from the upper end of said walls and inward of said shelf from said tubular channels.
Claim 12
Dependent Claim
21 words
A shelf according to claim 7 wherein said horizontal portions are secured to the respective upper flanges of said tubular channels.
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |