US4828112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal transport pan
Assignee: Polar Ware Co
•
Filing: 1987-06-12
•
Granted: 1989-05-09
•
Expires: 2007-06-12
Abstract
Abstract A metal transport pan having front, rear and end side walls extending downwardly with a slight inward taper and which are joined at curved corners, the lower parts of which have a similar taper and a top flange extending outwardly from the top of the side walls. Each of the curved corners has a nontapered section extending downwardly from the top flange generally at a right angle thereto to provide an outwardly protruding ridge whereby the spaced-apart ridges define a plurality of nesting surfaces for engagement with the top flange of a subjacent pan to limit the extent to which one pan may nest into the other and prevent contact between the side walls of the nested pans to maintain the stacked pans in nonjamming relation. The nontapered sections of the curved corners are formed at the same time as a conventional pan-forming draw is being performed in order to avoid any additional manufacturing steps.
Inventors
- 👤 Richard J. Vollrath
- 👤 Christopher R. Vollrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:06
CPC Classifications
B; B65; B65D; B65D21/00; B65D21/02; B65D21/0233
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
240 words
A metal transport pan shaped for mounting in a steam table comprising perimetric wall means and an integral bottom curvingly joined to the perimetric wall means, a top flange integral with said perimetric wall means extending outwardly therefrom and shaped to completely cover an opening in a steam table, said perimetric wall means having a uniform downward and inward taper at a preselected angle to said bottom to facilitate nesting of the pan into a subjacent pan of the same construction, and means for preventing jamming of said pan when nested with another pan comprising spaced-apart corner portions of the perimetric wall means defining upper sections extending downwardly from the top flange which are drawn in the pan-forming process to diverge from the uniform taper and extend generally at right angles to the top flange to define at each of their lower ands a curved outwardly-protruding ridge which taken together provide a perimetric dimension greater than that defined by the portions of the top flange which are joined to said spaced-apart sections of the perimetric wall means because of the thickness of the metal of the perimetric wall means, said corner portions further defining lower sections extending downwardly at substantially said preselected angle whereby the pan may nest with a subjacent pan with the ridges resting on the top flange of the subjacent pan to avoid the pans jamming together while effectively maximizing the volume within said perimetric wall means.
Claim 2
Dependent Claim
240 words
A metal transport pan shaped for mounting in a steam table comprising perimetric wall means and an integral bottom curvingly joined to the perimetric wall means, a top flange integral with said perimetric wall means extending outwardly therefrom and shaped to completely cover an opening in a steam table, said perimetric wall means having a uniform downward and inward taper at a preselected angle to said bottom to facilitate nesting of the pan into a subjacent pan of the same construction, and means for preventing jamming of said pan when nested with another pan comprising spaced-apart corner portions of the perimetric wall means defining upper sections extending downwardly from the top flange which are drawn in the pan-forming process to diverge from the uniform taper and extend generally at right angles to the top flange to define at each of their lower ands a curved outwardly-protruding ridge which taken together provide a perimetric dimension greater than that defined by the portions of the top flange which are joined to said spaced-apart sections of the perimetric wall means because of the thickness of the metal of the perimetric wall means, said corner portions further defining lower sections extending downwardly at substantially said preselected angle whereby the pan may nest with a subjacent pan with the ridges resting on the top flange of the subjacent pan to avoid the pans jamming together while effectively maximizing the volume within said perimetric wall means.
Claim 3
Dependent Claim
16 words
A pan is defined in claim 1 wherein said metal pan is made of stainless steel.
Claim 4
Dependent Claim
44 words
A pan as defined in claim 1 wherein said nontapered upper sections of the side wall curved corners are formed in a draw step which at the same time is producing a taper in the remainder of the curved corners and the side walls.
Claim 5
Dependent Claim
35 words
A metal transport pan as defined in claim 1 wherein the perimetric wall means comprises front, rear and end side walls joined at curved corners and said spaced-apart sections are formed at the curved corners.
Claim 6
Dependent Claim
27 words
A metal transport pan as defined in claim 1 wherein said corner portions, the top flange, and said ridge comprise concurrently draw formed portions of the pan.
Claim 7
Dependent Claim
255 words
A generally rectangular metal transport pan comprising front rear and end side walls joined together at curved corners, a bottom integral with said side walls and curvingly joined to the side walls and to said curved corners at a knuckle radius, a top flange integral with the upper ends of said side walls and extending outwardly therefrom, said side walls and a lower part of the connecting curved corners having substantially the same downward and inward taper to facilitate nesting of the pan into a subjacent pan of the same dimensions, said taper being minimal to maximize the capacity of the pan and which resultingly increases the tendency of nested pans to jam together, the upper ends of said side walls being connected by said curved corners which lie within the intersecting planes of adjacent side wall upper ends, and means for preventing jamming of said pan when nested in said subjacent pan comprising an upper section of the side wall curved corners offset outwardly from said downward and inward taper to extend downwardly from the top flange at right angles thereto to define an outwardly offset arcuate ridge at the lower end of each upper section, said arcuate ridges at the four corners of the pan being sized to provide a perimetric dimension greater than the open top of the pan due to the thickness of the side walls whereby the pan may partially nest within said subjacent pan with the arcuate ridges engaging the top of the side walls of the subjacent pan.
Claim 8
Dependent Claim
255 words
A generally rectangular metal transport pan comprising front rear and end side walls joined together at curved corners, a bottom integral with said side walls and curvingly joined to the side walls and to said curved corners at a knuckle radius, a top flange integral with the upper ends of said side walls and extending outwardly therefrom, said side walls and a lower part of the connecting curved corners having substantially the same downward and inward taper to facilitate nesting of the pan into a subjacent pan of the same dimensions, said taper being minimal to maximize the capacity of the pan and which resultingly increases the tendency of nested pans to jam together, the upper ends of said side walls being connected by said curved corners which lie within the intersecting planes of adjacent side wall upper ends, and means for preventing jamming of said pan when nested in said subjacent pan comprising an upper section of the side wall curved corners offset outwardly from said downward and inward taper to extend downwardly from the top flange at right angles thereto to define an outwardly offset arcuate ridge at the lower end of each upper section, said arcuate ridges at the four corners of the pan being sized to provide a perimetric dimension greater than the open top of the pan due to the thickness of the side walls whereby the pan may partially nest within said subjacent pan with the arcuate ridges engaging the top of the side walls of the subjacent pan.
References Cited (Backward Citations)
GB198037A
Cited
US3233812A
Cited
US3558002A
Cited
US3884383A
Cited
US4113095A
Cited
US4660734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |