Patent US387015A successfully refreshed from Google Patents.
Patent US3661290A successfully refreshed from Google Patents.
US3661290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Working chamber
Assignee: Individual
•
Filing: 1970-06-24
•
Granted: 1972-05-09
•
Expires: 1990-06-24
Abstract
Abstract A variable configuration and volume chamber which, in its most basic form, consists of a plurality of first substantially rigid panels the marginal edges of which form a substantially rectilinear acute triangle and a plurality of second substantially rigid panels, the marginal edges of which form a substantially rectilinear obtuse triangle. The chamber is formed by hinge-joining marginal edges of respective panels in a particular arrangement such that the jointure of the second rectilinear obtuse triangle panels together with the obtuse vertices of the joined second panels intersect at the longitudinal axis of the chamber whereby rectilinear movement of the intersection is maintained in a plane of symmetry of the chamber throughout actuation of the chamber.
Inventors
- 👤 Arthur Clyde Davenport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:17
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/28; B63B35/285; B64; B64B; B64B1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
251 words
A variable configuration and volume chamber comprising: at least one first chamber section, said first chamber section comprising a plurality of first substantially rigid panels with the marginal edges of each forming a substantially rectilinear acute triangle, and a plurality of second substantially rigid panels, the marginal edges of each forming a substantially rectilinear obtuse triangle, said chamber being formed by at least two pairs of first panels having corresponding marginal edges of respective panels of each pair hinge-joined together and defining outer chamber walls and other marginal edges of respective panels of each pair of first panels hinge-joined to corresponding marginal edges of respective panels of at least two pairs of second panels, each of said two pairs of second panels further having other corresponding marginal edges of both panels hinge-joined together and each panel of each of said second pairs of panels further having a third marginal edge hinge-joined to a similar marginal edge of a corresponding panel of said other pair of second panels, said jointure of said third marginal edges of said second panels lying in a plane of symmetry of said chamber; whereby the hinge-joined attachment of said panels along said marginal edges allows said chamber to follow a predetermined correlated pattern of change in configuration and volume when acted upon, said pattern being characterized by the movement of the jointure of said third marginal edges of said second panels being maintained in a plane of symmetry of said chamber throughout the actuation of said chamber.
Claim 2
Dependent Claim
251 words
A variable configuration and volume chamber comprising: at least one first chamber section, said first chamber section comprising a plurality of first substantially rigid panels with the marginal edges of each forming a substantially rectilinear acute triangle, and a plurality of second substantially rigid panels, the marginal edges of each forming a substantially rectilinear obtuse triangle, said chamber being formed by at least two pairs of first panels having corresponding marginal edges of respective panels of each pair hinge-joined together and defining outer chamber walls and other marginal edges of respective panels of each pair of first panels hinge-joined to corresponding marginal edges of respective panels of at least two pairs of second panels, each of said two pairs of second panels further having other corresponding marginal edges of both panels hinge-joined together and each panel of each of said second pairs of panels further having a third marginal edge hinge-joined to a similar marginal edge of a corresponding panel of said other pair of second panels, said jointure of said third marginal edges of said second panels lying in a plane of symmetry of said chamber; whereby the hinge-joined attachment of said panels along said marginal edges allows said chamber to follow a predetermined correlated pattern of change in configuration and volume when acted upon, said pattern being characterized by the movement of the jointure of said third marginal edges of said second panels being maintained in a plane of symmetry of said chamber throughout the actuation of said chamber.
Claim 3
Dependent Claim
95 words
The variable configuration and volume chamber as claimed in claim 1, further comprising at least one second chamber section hinge-joined to said first chamber section and comprising at least four substantially rigid panels with the marginal edges of each forming a substantially rectilinear acute triangle and having marginal edges hinge-joined to define a pyramidal chamber section, with the base marginal edges of said four panels being hinge-joined to the base marginal edges of the first panels of said first chamber section; whereby, when said chamber is completely expanded, the overall configuration comprises apparent base-joined pyramids.
Claim 4
Dependent Claim
68 words
The variable configuration and volume chamber as claimed in claim 2, further comprising at least one third chamber section said third chamber section comprising at least four generally rectangular, substantially rigid panels hinge-joined to each other said third chamber section further being inserted between said first and second chamber sections and having respective edges hinge-joined to the corresponding base marginal edges of said first and second chamber sections.
Claim 5
Dependent Claim
35 words
The variable configuration and volume chamber as claimed in claim 3, wherein a plurality of said chambers comprise a clustered array, with the rectangular panels of respective third chamber sections joined in aligned planar abutment.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |