US3709409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal means for a compressed gas spraying device
Assignee: Root Lowell Manufacturing Co
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Filing: 1970-08-31
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Granted: 1973-01-09
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Expires: 1990-08-31
Abstract
Abstract A means of sealing a removable pump element to the air tank of a spraying device. An annular flexible seal is positioned around the opening into the tank. The pump element is inserted through the tank opening and includes an annular cap part which engages the seal. The tank includes a lip which overlies the marginal edge of the cap of the pump element. When the tank is placed under pressure by actuation of the pump element, the cap of the pump element is forced upwardly against the lip of the tank with the seal remaining in sealing engagement with the cap.
Inventors
- 👤 D Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:18
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/24; B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/08; B05B9/0805; B05B9/0811; B05B9/0816; F16J13/02; F16J13/12; F16J15/00; F16J15/46; F16J15/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
355 words
In a sprayer including a tank having an upper wall with an opening therein and a removable pump assembly carried by said tank wall and having parts extending downwardly through said opening into said tank, the improvement wherein said opening is defined by an edge portion, said tank wall including a flange spacedly overlying said opening edge portion, a flexible seal carried by said opening edge portion and including a generally annular marginal portion extending outwardly from said opening edge portion into said opening, said pump assembly including cap means for sealing said tank opening, said cap means having parts positioned between said opening edge portion and said tank flange and being rotatable relative to said tank into a first position spaced from said tank flange and in circumferential engagement with said seal when said tank is at atmospheric pressure, stop means preventing unlimited rotation of said cap means relative to said tank for locating said cap means in its said first position, said cap means having a second position abutting said tank flange in circumferential sealing engagement with said seal when said tank is pressurized, said cap means being shiftable from its first position into its second position upon actuation of said pump assembly parts to pressurize said tank, said tank flange being Annular and interrupted by a plurality of openings, said cap means including an annular portion in circumferential engagement with said seal in both said first and second positions, the inner diameter of said tank flange exceeding the outer diameter of said cap means annular portion, said cap means parts constituting circumferentially spaced tab means extending outwardly of said cap means annular portion and terminating at an outer diametrical dimension exceeding the inner diameter of said tank flange, said tab means being insertable downwardly through said flange openings and below the level of said tank flange, means for rotating said cap means with said tab means below the level of said tank flange to cause said tab means to be positioned between said opening edge portion and the uninterrupted parts of said tank flange at said first position of the cap means.
Claim 2
Dependent Claim
355 words
In a sprayer including a tank having an upper wall with an opening therein and a removable pump assembly carried by said tank wall and having parts extending downwardly through said opening into said tank, the improvement wherein said opening is defined by an edge portion, said tank wall including a flange spacedly overlying said opening edge portion, a flexible seal carried by said opening edge portion and including a generally annular marginal portion extending outwardly from said opening edge portion into said opening, said pump assembly including cap means for sealing said tank opening, said cap means having parts positioned between said opening edge portion and said tank flange and being rotatable relative to said tank into a first position spaced from said tank flange and in circumferential engagement with said seal when said tank is at atmospheric pressure, stop means preventing unlimited rotation of said cap means relative to said tank for locating said cap means in its said first position, said cap means having a second position abutting said tank flange in circumferential sealing engagement with said seal when said tank is pressurized, said cap means being shiftable from its first position into its second position upon actuation of said pump assembly parts to pressurize said tank, said tank flange being Annular and interrupted by a plurality of openings, said cap means including an annular portion in circumferential engagement with said seal in both said first and second positions, the inner diameter of said tank flange exceeding the outer diameter of said cap means annular portion, said cap means parts constituting circumferentially spaced tab means extending outwardly of said cap means annular portion and terminating at an outer diametrical dimension exceeding the inner diameter of said tank flange, said tab means being insertable downwardly through said flange openings and below the level of said tank flange, means for rotating said cap means with said tab means below the level of said tank flange to cause said tab means to be positioned between said opening edge portion and the uninterrupted parts of said tank flange at said first position of the cap means.
Claim 3
Dependent Claim
21 words
The sprayer of claim 1, wherein said tab means are inclined and extend upwardly relative to said cap means annular portion.
Claim 4
Dependent Claim
74 words
The sprayer of claim 1, and including a plurality of lipped parts spaced above said tank flange, each lipped part overlying an opening in said tank flange, the spacing between each lipped part and the plane of the upper surface of said tank flange being sufficient to permit the sideway entry of said tab means therebetween upon rotation of said cap means whereby said tab means are positioned over openings in said tank flange.
Claim 5
Dependent Claim
25 words
The sprayer of claim 1 wherein said tab means is insertable vertically downward through said flange opening and below the level of said tank flange.
Claim 6
Dependent Claim
56 words
The sprayer of claim 1, wherein the marginal portion of said seal is in underlying contact with said cap means annular portion in both first and second positions of said cap means and is sufficiently flexible to remain in contact with said annular portion as said cap means moves from its first into its second position.
Claim 7
Dependent Claim
74 words
The sprayer of claim 5, wherein said cap means annular portion includes an upwardly extending annular web and a flange extending laterally outwardly from the upper edge of said web, said seal including means for mounting its said marginal portion to the opening edge portion of said tank, said tab means connected to said cap means flange, said cap means flange supported by said opening edge portion when said tank is at atmospheric pressure.
Claim 8
Dependent Claim
32 words
The sprayer of claim 6, wherein the marginal portion of said seal is in a downward flexed position when engaged by said cap annular portion and said tank is at atmospheric pressure.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |