US3964402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable stage
Assignee: Wenger Corp
•
Filing: 1974-05-01
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Granted: 1976-06-22
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Expires: 1994-05-01
Abstract
Abstract A portable stage having plural separable stage units with means for holding adjacent stage units in fixed relation and at the same or different heights, including a pair of elongate grooved members associated one with each stage unit and with clamp mechanism positionable within the grooves of both of said members for imparting rigidity to the adjacent stage units and for holding said stage units locked to each other.
Inventors
- 👤 James F. Jenne'
- 👤 Irvin E. Dorschner
- 👤 Harvey M. Urch
- 👤 Jerry A. Wenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:02
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/22; E04H3/24; E04H3/28; Y; Y10; Y10T; Y10T403/00; Y10T403/60; Y10T403/608
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
A portable stage having plural separable stage units and means for holding adjacent stage units in fixed relation including a pair of elongate grooved members attached one to each stage unit and opening outwardly therefrom and with a pair of inturned flanges on each member, a clamp mechanism positioned within the grooves of both of said grooved members and including rigid members between and in engagement with said pairs of flanges to define a tongue and groove connection between units for imparting rigidity to said grooved members and having pivotally mounted means to move behind and engage a flange on each of said grooved members and hold said grooved members locked to each other.
Claim 2
Dependent Claim
114 words
A portable stage having plural separable stage units and means for holding adjacent stage units in fixed relation including a pair of elongate grooved members attached one to each stage unit and opening outwardly therefrom and with a pair of inturned flanges on each member, a clamp mechanism positioned within the grooves of both of said grooved members and including rigid members between and in engagement with said pairs of flanges to define a tongue and groove connection between units for imparting rigidity to said grooved members and having pivotally mounted means to move behind and engage a flange on each of said grooved members and hold said grooved members locked to each other.
Claim 3
Dependent Claim
83 words
A portable stage as defined in claim 1 wherein said clamp mechanism includes a mounting plate, said rigid members of the clamp mechanism comprising a pair of plates associated with said mounting plate at spaced locations to define a pair of hollow rectangular housings which engage between said pair of flanges for said imparting of rigidity, and said pivotally mounted means including a U-shaped member pivotally mounted to one of said housings and with a pair of legs each engageable behind a flange.
Claim 4
Dependent Claim
39 words
A portable stage unit as defined in claim 2 wherein said pair of legs each have an inclined cam surface to engage behind said flanges and draw said grooved members toward each other as said U-shaped member is pivoted.
Claim 5
Dependent Claim
45 words
A portable stage unit as defined in claim 3 wherein said U-shaped member has a clamping position and a nonclamping position, a spring for holding said U-shaped member in one or the other of said positions, and an operating handle connected to said U-shaped member.
Claim 6
Dependent Claim
77 words
A portable stage as defined in claim 1 and having a perimetral frame defined by a plurality of said elongate grooved members, a surface panel mounted on said perimetral frame, a series of tubes secured to said frame interior, openings in said surface panel aligned with said tubes for mounting of structure in said tubes or passage of objects such as conduit therethrough, and a plurality of plug members for closing said openings when not in use.
Claim 7
Dependent Claim
103 words
A portable stage having plural stage units for association in a desired relation, adjustable length leg means associated with each unit, manually-operable clamp mechanism for interconnecting adjacent stage units including an elongate body, a pair of housings positioned at each end of said body and a U-shape clamp member with a pair of spaced legs pivotally mounted on each housing, and a pair of C-shape members associated one with each adjacent stage unit and having an outwardly-opening groove for receiving said housings in said grooves and with spaced apart flanges for engagement by said clamp member legs as the clamp member is pivoted.
Claim 8
Dependent Claim
103 words
A portable stage having plural stage units for association in a desired relation, adjustable length leg means associated with each unit, manually-operable clamp mechanism for interconnecting adjacent stage units including an elongate body, a pair of housings positioned at each end of said body and a U-shape clamp member with a pair of spaced legs pivotally mounted on each housing, and a pair of C-shape members associated one with each adjacent stage unit and having an outwardly-opening groove for receiving said housings in said grooves and with spaced apart flanges for engagement by said clamp member legs as the clamp member is pivoted.
Claim 9
Dependent Claim
81 words
A portable stage having clamp mechanism for attaching adjacent stage units, said clamp mechanism comprising a generally L-shape elongate mounting plate, a pair of plates associated with said mounting plate at spaced locations to define a pair of rectangular housings, a pivotable clamp member pivotally mounted at each housing and including a U-shaped member with a pair of spaced legs, a handle connected to said clamp member, and means for holding said clamp member in either a clamping or nonclamping position.
Claim 10
Dependent Claim
81 words
A portable stage having clamp mechanism for attaching adjacent stage units, said clamp mechanism comprising a generally L-shape elongate mounting plate, a pair of plates associated with said mounting plate at spaced locations to define a pair of rectangular housings, a pivotable clamp member pivotally mounted at each housing and including a U-shaped member with a pair of spaced legs, a handle connected to said clamp member, and means for holding said clamp member in either a clamping or nonclamping position.
Claim 11
Dependent Claim
52 words
A portable stage as defined in claim 7 wherein said clamp mechanism is removably attachable to a stage unit having an elongate grooved member, including a flange on said mounting plate engageable within the groove of the grooved member, and a locking tab on said mounting plate engageable with said grooved member.
Claim 12
Dependent Claim
38 words
A portable stage as defined in claim 7 wherein said holding means for the clamp member includes a leaf spring engageable with the clamp member to exert a force holding the clamp member in either of said positions.
Claim 13
Dependent Claim
44 words
A portable stage as defined in claim 7 wherein the legs of said clamp member each have an inclined cam surface at a leading edge thereof to draw a pair of stage units toward each other as the clamp member moves to clamping position.
References Cited (Backward Citations)
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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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |