US4460394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporative cooler pad assembly
Assignee: FF SEELEY NOMINEES PTY Ltd COMMONWEALTH OF AUSTRALIA
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Filing: 1982-06-14
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Granted: 1984-07-17
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Expires: 2002-06-14
Abstract
Abstract An evaporative cooler pad assembly comprising a pad of absorbent material, e.g. woodwool is retained between a pair of side grids each of which has projections which interengage the other, and at least some of the projections extend through the pad and support it.
Inventors
- 👤 Robert W. Wrightson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:43
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; F28C3/08; Y; Y10; Y10S; Y10S261/00; Y10S261/41; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
An evaporative cooler pad assembly comprising a pad of absorbent material and a pair of side grids, each said grid being a moulding of polymeric material and having a plurality of projections interengaging the other said grid, at least some of said projections extending through said pad and thereby supporting said pad, each said grid being of identical size and shape, one being inverted and reversed in direction with respect to the other, each said projection of each said grid being a spike, and each of at least some of said projections has a barbed end which engages a membrane in the other of said grids and resists release and wherein one edge of each of said grids has a row of tabs extending therefrom, and a row of stub posts also extending therefrom and supporting a guide bar spaced from the tabs to define a slot in end elevation, the other end also having a plurality of stub posts extending therefrom and supporting a retaining bar which is spaced from the guide bar of the other said grid and defines therewith a retaining space which retains and compresses the pad of absorbent material.
Claim 2
Dependent Claim
194 words
An evaporative cooler pad assembly comprising a pad of absorbent material and a pair of side grids, each said grid being a moulding of polymeric material and having a plurality of projections interengaging the other said grid, at least some of said projections extending through said pad and thereby supporting said pad, each said grid being of identical size and shape, one being inverted and reversed in direction with respect to the other, each said projection of each said grid being a spike, and each of at least some of said projections has a barbed end which engages a membrane in the other of said grids and resists release and wherein one edge of each of said grids has a row of tabs extending therefrom, and a row of stub posts also extending therefrom and supporting a guide bar spaced from the tabs to define a slot in end elevation, the other end also having a plurality of stub posts extending therefrom and supporting a retaining bar which is spaced from the guide bar of the other said grid and defines therewith a retaining space which retains and compresses the pad of absorbent material.
Claim 3
Dependent Claim
24 words
An evaporative cooler pad assembly according to claim 1 wherein each said membrane is part conical in shape and is surrounded by a boss.
Claim 4
Dependent Claim
40 words
An evaporative cooler pad assembly according to claim 1 wherein said pair of side grids are positioned and arranged to retain the pad from lateral displacement and said projections are positioned and arrange to retain said pad from vertical displacement.
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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |