US3575122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of constructing a hatch frame and cover therefor
Assignee: Stanray Corp
•
Filing: 1968-07-03
•
Granted: 1971-04-13
•
Expires: 1988-07-03
Abstract
Abstract Methods for forming hatch frames integral with a roof sheet for a car or container. In one embodiment the hatch frame is constructed so that the cutout portion forming the hatch opening is used to provide a hatch cover. Another embodiment includes the formation of a hatch frame and cover member, simultaneously with corrugations in the roof sheet.
Inventors
- 👤 John A Brossart Jr
- 👤 William W Lannin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:01
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44; B21D53/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
A method of forming a hatch frame in a roof sheet comprising stretching said roof sheet to form a pan therein having a sidewall and top, cutting a circular opening in the top of said pan after formation of said pan, stretching said roof sheet about said circular opening to form an upstanding wall bounding said opening, reforming said upstanding wall between a pair of die members to form a continuous outwardly curled weather lip at the upper end thereof and shape said wall to the final configuration of a substantially circular hatch frame.
Claim 2
Independent Claim
94 words
A method of forming a hatch frame in a roof sheet comprising stretching said roof sheet to form a pan therein having a sidewall and top, cutting a circular opening in the top of said pan after formation of said pan, stretching said roof sheet about said circular opening to form an upstanding wall bounding said opening, reforming said upstanding wall between a pair of die members to form a continuous outwardly curled weather lip at the upper end thereof and shape said wall to the final configuration of a substantially circular hatch frame.
Claim 3
Dependent Claim
34 words
The invention as defined in claim 1 wherein said roof sheet is stretched so that said pan is formed with a circular upstanding wall having a diameter greater than said finally configured hatch frame.
Claim 4
Dependent Claim
49 words
The invention as defined in claim 1 wherein said top is cut to provide said opening and a bounding annular web, and wherein said pan with said opening formed therein is pressed between die members to stretch said opening and to form said annular web into said upstanding wall.
Claim 5
Independent Claim
110 words
A method of forming a hatch frame in a roof sheet comprising stretching said sheet to form a shallow circular pan having a flat top, simultaneously stretching said roof sheet at a location remote from said shallow circular pan to form a corrugation in said roof sheet, cutting a circular opening in said flat top wall bounded by an annular web, stretching said annular web about said opening to form an upstanding wall, reforming said upstanding wall between a pair of die members to form a continuous outwardly curled weather lip at the upper end thereof and shape said wall to the final configuration of a substantially circular hatch frame.
Claim 6
Independent Claim
110 words
A method of forming a hatch frame in a roof sheet comprising stretching said sheet to form a shallow circular pan having a flat top, simultaneously stretching said roof sheet at a location remote from said shallow circular pan to form a corrugation in said roof sheet, cutting a circular opening in said flat top wall bounded by an annular web, stretching said annular web about said opening to form an upstanding wall, reforming said upstanding wall between a pair of die members to form a continuous outwardly curled weather lip at the upper end thereof and shape said wall to the final configuration of a substantially circular hatch frame.
Claim 7
Dependent Claim
37 words
The invention as defined in claim 4 wherein a plurality of said roof hatches are simultaneously formed in said roof sheet, and wherein said corrugation is formed simultaneously with the formation of said plurality of hatch frames.
Claim 8
Independent Claim
117 words
The method of forming a hatch frame in a roof sheet comprising stretching said sheet to form a shallow domed pan, stretching said shallow domed pan to increase the height thereof, stretching and reforming said last-formed domed pan to form a circular pan having a flat top, severing said pan along the side of said pan to form an opening in said pan and provide a hatch cover from said severed pan portion, reforming said remaining pan portion between a pair of die members to shrink and form a continuous outwardly curled weather lip at the upper end thereof with said lip sized to receive said hatch cover thereon and to impart the final hatch frame configuration.
Claim 9
Independent Claim
117 words
The method of forming a hatch frame in a roof sheet comprising stretching said sheet to form a shallow domed pan, stretching said shallow domed pan to increase the height thereof, stretching and reforming said last-formed domed pan to form a circular pan having a flat top, severing said pan along the side of said pan to form an opening in said pan and provide a hatch cover from said severed pan portion, reforming said remaining pan portion between a pair of die members to shrink and form a continuous outwardly curled weather lip at the upper end thereof with said lip sized to receive said hatch cover thereon and to impart the final hatch frame configuration.
Claim 10
Independent Claim
93 words
The method of forming a cylindrical hatch frame in a roof sheet comprising stretching said sheet by successive pressings to form a domed pan having a flat top, severing said pan along the side of said pan to form a flanged opening and provide a flanged hatch cover from said severed pan portion, reforming said flanged opening between a pair of die members to shrink and form a continuously outwardly curled weather lip at the upper end thereof, sized to receive said hatch cover thereon and to impart the final hatch frame configuration.
Claim 11
Independent Claim
93 words
The method of forming a cylindrical hatch frame in a roof sheet comprising stretching said sheet by successive pressings to form a domed pan having a flat top, severing said pan along the side of said pan to form a flanged opening and provide a flanged hatch cover from said severed pan portion, reforming said flanged opening between a pair of die members to shrink and form a continuously outwardly curled weather lip at the upper end thereof, sized to receive said hatch cover thereon and to impart the final hatch frame configuration.
Claim 12
Independent Claim
92 words
A method of forming an integral cylindrical hatch frame and cover therefor from a flat sheet, comprising pressing a pan upwardly therefrom, having a diameter larger than the curled edge of the frame to be formed, severing the pan from the frame by cutting the frame circumferentially near the top of the pan to provide a cover with an annular flange, shrinking the remaining flange to a smaller diameter, and finally curling and stretching the top margin of said conical frame into a laterally outwardly curled flange for receiving the flanged cover.
Claim 13
Independent Claim
92 words
A method of forming an integral cylindrical hatch frame and cover therefor from a flat sheet, comprising pressing a pan upwardly therefrom, having a diameter larger than the curled edge of the frame to be formed, severing the pan from the frame by cutting the frame circumferentially near the top of the pan to provide a cover with an annular flange, shrinking the remaining flange to a smaller diameter, and finally curling and stretching the top margin of said conical frame into a laterally outwardly curled flange for receiving the flanged cover.
Claim 14
Independent Claim
96 words
A method of forming a hatch frame integral with a roof sheet comprising stretching said roof sheet to form a circular pan with an upstanding sidewall and a top, cutting the sidewall circumferentially adjacent the top to form a hatch cover with a depending annular flange, and provide a hatch opening in said roof bounded by said sidewall, reforming said sidewall to shrink the diameter thereof and simultaneously form an outwardly curled weather lip at the upper end thereof so that the said hatch cover is seatable thereon with said depending flange embracing said weather lip.
Claim 15
Independent Claim
96 words
A method of forming a hatch frame integral with a roof sheet comprising stretching said roof sheet to form a circular pan with an upstanding sidewall and a top, cutting the sidewall circumferentially adjacent the top to form a hatch cover with a depending annular flange, and provide a hatch opening in said roof bounded by said sidewall, reforming said sidewall to shrink the diameter thereof and simultaneously form an outwardly curled weather lip at the upper end thereof so that the said hatch cover is seatable thereon with said depending flange embracing said weather lip.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |