US3599872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means in a rotating spray device
Assignee: General Electric Co
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Filing: 1969-08-14
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Granted: 1971-08-17
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Expires: 1989-08-14
Abstract
Abstract A ribbonlike flexible strip or tape formed from a highly durable abrasion-resistant material having a low surface friction characteristic, such as is obtainable from nylon or fluorocarbon resin, is used to obtain a seal between a stationary tubular pedestal and a spray arm mounted for rotation thereon. The seal obtained therewith serves the purpose of substantially eliminating leakage of pressurized liquid passing through the hollow pedestal and into the body of the spray arm, and may, in one embodiment of the invention, be also utilized as a bearing in the assembly. The tape is supported by annular retaining portions extended from the tubular pedestal and the spray arm hub, and the ends of the tape loosely overlap each other. The tape is adapted to be radially outwardly enlarged against the annular retaining portions in response to liquid pressure whereby a sealing effect is obtained.
Inventors
- 👤 Lauren W Guth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/14; A47L15/18; A47L15/22; A47L15/23
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
164 words
In a liquid spray device having a hollow spray arm member rotatably supported on the end of a stationary tubular member, wherein the hub of the spray arm member is adapted to receive a pressurized flow of liquid from the stationary tubular member, improved means for reducing liquid leakage at the junction of the spray arm hub with the lip of the tubular member, comprising: a. a pliable tapelike seal having a low surface friction characteristic, disposed in an annular orientation at the junction, b. annular retaining means integral to at least one of said members and disposed outwardly circumjacent said seal, c. annular inner support means integral to at least one of said members and disposed inwardly circumjacent said seal, and d. said seal being disposed loosely with respect to said support means at said junction such that the pressure of the liquid flowing from the tubular member to the spray arm member will urge the seal outwardly against said annular retaining means.
Claim 2
Dependent Claim
164 words
In a liquid spray device having a hollow spray arm member rotatably supported on the end of a stationary tubular member, wherein the hub of the spray arm member is adapted to receive a pressurized flow of liquid from the stationary tubular member, improved means for reducing liquid leakage at the junction of the spray arm hub with the lip of the tubular member, comprising: a. a pliable tapelike seal having a low surface friction characteristic, disposed in an annular orientation at the junction, b. annular retaining means integral to at least one of said members and disposed outwardly circumjacent said seal, c. annular inner support means integral to at least one of said members and disposed inwardly circumjacent said seal, and d. said seal being disposed loosely with respect to said support means at said junction such that the pressure of the liquid flowing from the tubular member to the spray arm member will urge the seal outwardly against said annular retaining means.
Claim 3
Dependent Claim
21 words
The combination set forth in claim 1 wherein said seal is a loosely coiled strip having ends which overlap each other.
Claim 4
Dependent Claim
32 words
The combination set forth in claim 1 including means for engaging said seal whereby said seal is held fixed relative to the stationary tubular member when the spray arm member rotates thereon.
Claim 5
Dependent Claim
15 words
The combination set forth in claim 1 wherein said seal is formed from polytetrafluoroethylene material.
Claim 6
Dependent Claim
16 words
The combination set forth in claim 1 wherein said seal is formed from a fiber-reinforced material.
Claim 7
Dependent Claim
147 words
In a washing liquid spray device for a dishwashing machine wherein a stationary tubular pedestal extends into the washing chamber of the machine, a bottom spray arm is supported for rotation on the pedestal rim, and the spray arm is in liquid flow communication with a liquid passageway through the pedestal, the improvement comprising: a. a ribbonlike flexible strip disposed annularly at the junction and adapted to fit loosely between the spray arm and the pedestal rim whereby the ends of said strip overlap each other, b. annular retaining means disposed outwardly circumjacent said strip for holding said strip in place at said junction, and c. said strip being adapted to respond to pressure of liquid flowing from the pedestal passageway and into the spray arm whereby the outer surface of said strip is forced against said annular retaining means to form a seal in cooperation therewith.
Claim 8
Dependent Claim
147 words
In a washing liquid spray device for a dishwashing machine wherein a stationary tubular pedestal extends into the washing chamber of the machine, a bottom spray arm is supported for rotation on the pedestal rim, and the spray arm is in liquid flow communication with a liquid passageway through the pedestal, the improvement comprising: a. a ribbonlike flexible strip disposed annularly at the junction and adapted to fit loosely between the spray arm and the pedestal rim whereby the ends of said strip overlap each other, b. annular retaining means disposed outwardly circumjacent said strip for holding said strip in place at said junction, and c. said strip being adapted to respond to pressure of liquid flowing from the pedestal passageway and into the spray arm whereby the outer surface of said strip is forced against said annular retaining means to form a seal in cooperation therewith.
Claim 9
Dependent Claim
25 words
The combination set forth in claim 6 including means for preventing said strip from moving relative to the pedestal when the spray arm is rotating.
Claim 10
Dependent Claim
19 words
The combination of claim 6 wherein said strip is of a material having the characteristic of low surface friction.
Claim 11
Dependent Claim
12 words
The combination of claim 6 wherein said strip is formed from polytetrafluoroethylene.
Claim 12
Dependent Claim
15 words
The combination of claim 6 wherein said strip is formed from a fiber reinforced material.
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |