US3796416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier drum construction
Assignee: Toastmaster Inc
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Filing: 1972-09-07
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Granted: 1974-03-12
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Expires: 1992-09-07
Abstract
Abstract A humidifier drum construction having two spaced rigid circular end pieces and at least one unitary circumferentially disposed connecting piece therebetween, each connecting piece having an elongated flexible rail element and a plurality of rigid spaced rung elements thereon, whereby during drum fabrication the rail element can be flexed from the flat to a curvature smaller than the circular end pieces and the rung elements can be fitted transversely to and secured between the end pieces.
Inventors
- 👤 R Knudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:25
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/06; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
A humidifier drum, comprising in combination a pair of end pieces and innerconnecting means between and fixedly locating said end pieces, each end piece beinG rigid and having similarly sized circular exterior edges, one of the end pieces being in the form of a hoop and thereby also having an interior edge, the innerconnecting means consisting of at least one unitary piece having at least one elongated rail element and a plurality of spaced cross rung elements thereon, the rail element being flexible in the direction transverse to the rung elements to allow the shaping of same from the flat to a curve smaller than the exterior edges of the end pieces and the rung elements each being rigid and terminating at their ends along spaced parallel planes, and means between the end pieces and each unitary piece for rigidly joining the pieces together with each rail element extending parallel of and the rung elements extending transversely of the end piece exterior edges.
Claim 2
Dependent Claim
163 words
A humidifier drum, comprising in combination a pair of end pieces and innerconnecting means between and fixedly locating said end pieces, each end piece beinG rigid and having similarly sized circular exterior edges, one of the end pieces being in the form of a hoop and thereby also having an interior edge, the innerconnecting means consisting of at least one unitary piece having at least one elongated rail element and a plurality of spaced cross rung elements thereon, the rail element being flexible in the direction transverse to the rung elements to allow the shaping of same from the flat to a curve smaller than the exterior edges of the end pieces and the rung elements each being rigid and terminating at their ends along spaced parallel planes, and means between the end pieces and each unitary piece for rigidly joining the pieces together with each rail element extending parallel of and the rung elements extending transversely of the end piece exterior edges.
Claim 3
Dependent Claim
33 words
A humidifier drum according to claim 1, wherein each unitary piece has a pair of elongated rail elements and the spaced cross rung elements are extended transversely of and between the rail elements.
Claim 4
Dependent Claim
48 words
A humidifier drum according to claim 1, wherein each end piece has an annular boss disposed to project toward the other in assembled position and being of similar size and shape, and wherein each unitary piece cooperates with the end piece bosses effective for joining the pieces together.
Claim 5
Dependent Claim
31 words
A humidifier drum according to claim 3, wherein each boss is provided with a recess suitable for receiving and cooperating with the unitary piece effective for rigidly joining the pieces together.
Claim 6
Dependent Claim
59 words
A humidifier drum according to claim 3, wherein each unitary piece has two elongated rail elements and the cross rung elements are extended transversely of and between and terminate at the rail elements and wherein the end piece bosses have annular recesses provided in adjacent faces thereof suited to receive the rail elements effective for joining the pieces together.
Claim 7
Dependent Claim
28 words
A humidifier drum according to claim 5, wherein each rung element has a generally circular or eliptical cross section to provide a smooth exterior surface devoid of corners.
Claim 8
Dependent Claim
43 words
A humidifier drum according to claim 5, wherein each end piece has a circumferential land area and a radial rim outwardly adjacent the land area, and wherein the exterior edge of each rung element lines up with the adjacent end piece land areas.
Claim 9
Dependent Claim
144 words
A humidifier drum, comprising in combination a pair of end pieces and innerconnecting means between and fixedly locating said end pieces, each end piece being rigid and having exterior edges sized to define the exterior of the drum, the innerconnecting means consisting of at least one unitary piece having a pair of elongated rail elements and a plurality of spaced cross rung elements extended therebetween, the rail elements being flexible in the direction transverse to the rung elements to allow the shaping of same from the flat to a curve smaller than the exterior edges of the end pieces and the rung elements each being rigid, and means between the end pieces and rail elements of each unitary piece for rigidly joining the pieces together with each rail element extending parallel to and the rung elements extending transversely of the end piece exterior edges.
Claim 10
Dependent Claim
144 words
A humidifier drum, comprising in combination a pair of end pieces and innerconnecting means between and fixedly locating said end pieces, each end piece being rigid and having exterior edges sized to define the exterior of the drum, the innerconnecting means consisting of at least one unitary piece having a pair of elongated rail elements and a plurality of spaced cross rung elements extended therebetween, the rail elements being flexible in the direction transverse to the rung elements to allow the shaping of same from the flat to a curve smaller than the exterior edges of the end pieces and the rung elements each being rigid, and means between the end pieces and rail elements of each unitary piece for rigidly joining the pieces together with each rail element extending parallel to and the rung elements extending transversely of the end piece exterior edges.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |