Patent US4087785A successfully refreshed from Google Patents.
US4087785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable display equipment
Assignee: Federal Signal Corp
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Filing: 1977-03-07
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Granted: 1978-05-02
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Expires: 1997-03-07
Abstract
Abstract A portable electric sign display unit comprises a wheeled trailer having a main frame on which is mounted a motor-generator unit and a structure for holding a warning sign or the like in an elevated position. The sign carrying structure is collapsible into a position in which a central portion of the sign panel forms a roof over the motor-generator unit and two hinged side panels form the sides of the cover for the unit. The sign is erected by operation of a winch which first rotates the sign panel toward its vertical position and then raises the structure a further distance to the fully elevated position. The side panels are locked into position in the same plane as the central portion and electric lights forming the display are mounted on all three portions.
Inventors
- 👤 Nicholas A. Dodich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:28
CPC Classifications
B; B62; B62D; B62D63/00; B62D63/06; B62D63/062; B62D63/064; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/30; B60Q1/305; E; E01; E01F; E01F9/00; E01F9/60; E01F9/658; E01F9/662
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A portable display apparatus comprising a supporting structure of the wheeled trailer type, an upright support rigidly secured on said structure, a movable support member mounted on said upright support for up and down movement with respect thereto, a display carrying support pivotally mounted near the top of said movable support member for swinging movement between a horizontal position and a vertical position, means for successively rotating said display carrying support to an upright position in alignment with said upright support and then raising said movable support member to an elevated position above said supporting structure.
Claim 2
Dependent Claim
96 words
A portable display apparatus comprising a supporting structure of the wheeled trailer type, an upright support rigidly secured on said structure, a movable support member mounted on said upright support for up and down movement with respect thereto, a display carrying support pivotally mounted near the top of said movable support member for swinging movement between a horizontal position and a vertical position, means for successively rotating said display carrying support to an upright position in alignment with said upright support and then raising said movable support member to an elevated position above said supporting structure.
Claim 3
Dependent Claim
33 words
A portable display apparatus as set forth in claim 1 wherein said movable support member is of rectangular configuration and said upright support includes guides for constraining said movable member to linear movement.
Claim 4
Dependent Claim
80 words
A portable display apparatus as set forth in claim 1 wherein said means for rotating said display carrying support includes an elongated member extending normal to the axis of rotation on the side of the pivot remote from the display carrying portion thereof and wherein said rotating means includes a winch secured to said upright support and having a cable attached to the outer end of said elongated member and engaging a pulley adjacent the bottom of said movable member.
Claim 5
Dependent Claim
49 words
A portable display apparatus as set forth in claim 3 wherein said winch is near the upper end of said upright support and wherein said cable draws said elongated member against the movable support at the bottom thereof and then lifts the movable support upwardly along said upright support.
Claim 6
Dependent Claim
59 words
A portable display apparatus as set forth in claim 1 including stop means near the top of said upright structure and a projection near the lower end of said display support and extending horizontally and engaging said stop upon lowering of said display structure for tilting said structure to initiate the rotation thereof upon lowering of the display structure.
Claim 7
Dependent Claim
109 words
A portable display apparatus as set forth in claim 1 wherein said trailer includes a main frame, a motor-generator unit mounted on said frame and electric lights on said display carrying support supplied by said generator, and wherein said lights are mounted on a central panel and two side panels hinged thereto, said panels forming a single panel in the erected position of said structure and said central panel in the lowered position of said structure constituting a cover for said motor-generator unit and said hinged panels being rotatable to positions at right angles to the central panel and providing side covers for said unit and protecting said lights.
Claim 8
Dependent Claim
39 words
A portable display apparatus as set forth in claim 6 including means for locking said panels in their folded position for preventing vertical movement of said display carrying support and said movable support member during transportation of said apparatus.
Claim 9
Dependent Claim
23 words
A portable display apparatus as set forth in claim 7 wherein said locking means is actuated by rotation of said display carrying support.
Claim 10
Dependent Claim
69 words
A portable display apparatus as set forth in claim 6 including a pair of cylindrical cover members for enclosing said motor-generator unit at least one of said cover members being rotatable about the axis of said cover to a position of coincidence with the other for affording access to said unit, and means for locking said cover members together in their covering positions for preventing access to said unit.
Claim 11
Dependent Claim
30 words
A portable display apparatus as set forth in claim 1 including means for preventing the raising of said movable support member until said display carrying support approaches its vertical position.
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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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |