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US4167298A Expired / Lapsed US ⏱️ 0.0 years remaining

Balanced cabinet door lift

Assignee: Seco Products Corp
•
Filing: 1978-01-18
•
Granted: 1979-09-11
•
Expires: 1998-01-18
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Abstract

Abstract A gravity closed, spring-biased, door control and hinge configuration located near the center of the top of a display cabinet wherein a spring attached to a lever extending from an L-shaped door is placed under tension when the door is moved to close a combined side-and-top dispensing opening.

Inventors

  • 👤 Robert F. Plattner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 17:29
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/1041; E05F1/1066; E05F1/1075; E05Y; E05Y2900/00; E05Y2900/20; E05Y2900/204

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 198 words
A self service display cabinet having a rectangular body including means defining an access opening extending through one vertical side and a part of the top wall adjacent thereto, a transparent L-shaped closure unit for the opening pivotally mounted proximate to the edge of the opening on the top wall for opening and closing movement about a horizontal axis, elongated lever arm means rigidly carried by the closure unit and extending horizontally under the remaining portion of the top wall and disposed normal to, but below, the level of said axis when said unit is closed, resilient means comprising tension springs interconnecting the inner end of the lever arm means and the sides of the cabinet adjacent to the opening portion in the front wall at a position proximate to the level of said inner end in its closed position but above the level of said inner end to resiliently support the cover as a unit when the cover is in an intermediate partially open position, wherein said top wall rigidly supports the sides and back wall, and the bottom of the cabinet is open, and manual means on said closure unit for manually actuating said closure unit.
Claim 2
Dependent Claim 198 words
A self service display cabinet having a rectangular body including means defining an access opening extending through one vertical side and a part of the top wall adjacent thereto, a transparent L-shaped closure unit for the opening pivotally mounted proximate to the edge of the opening on the top wall for opening and closing movement about a horizontal axis, elongated lever arm means rigidly carried by the closure unit and extending horizontally under the remaining portion of the top wall and disposed normal to, but below, the level of said axis when said unit is closed, resilient means comprising tension springs interconnecting the inner end of the lever arm means and the sides of the cabinet adjacent to the opening portion in the front wall at a position proximate to the level of said inner end in its closed position but above the level of said inner end to resiliently support the cover as a unit when the cover is in an intermediate partially open position, wherein said top wall rigidly supports the sides and back wall, and the bottom of the cabinet is open, and manual means on said closure unit for manually actuating said closure unit.
Claim 3
Dependent Claim 27 words
The display cabinet defined in claim 1 in which the spring in its closed resting position provides an acute angle between it and the lever arm means.
Claim 4
Dependent Claim 19 words
The display cabinet defined in claim 1 in which the end walls determine the overall dimensions of the cabinet.

References Cited (Backward Citations)

US425891A Cited
CH90262A Cited
US1718880A Cited
US2854785A Cited
US2790690A Cited
US2758900A Cited
US3049390A Cited
US3330612A Cited
US3785452A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-09-10 1983-03-12 1983-09-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-09-10 1987-03-12 1987-09-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-09-10 1991-03-12 1991-09-11 $7700.00 Window Closed / Lapsed

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