US4111367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finger operated spray pump
Assignee: SPECIALTY ACQUISITION Corp A CORP OF DELAWARE
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Filing: 1977-02-18
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Granted: 1978-09-05
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Expires: 1997-02-18
Abstract
Abstract A finger-operated spray pump assembly including a tank, a primary piston slidably fitted inside the tank, having a liquid passageway, a secondary piston slidably fitted inside the primary piston, and a spring fitted inside the primary piston and the secondary piston for biasing the primary piston away from the secondary piston.
Inventors
- 👤 Thomas H. Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:16
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/34; B05B1/3405; B05B1/341; B05B1/3421; B05B1/3431; B05B11/00; B05B11/01; B05B11/10; B05B11/1042; B05B11/1073; B05B11/1074; B05B11/1038; B05B11/104; B05B11/1001; B05B11/1066; B05B11/1067
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A finger-operated spray pump assembly comprising: a. tank means having a bottom end and a top end; b. primary piston means slidably fitted for upward and downward movement in said tank means, said primary piston means having liquid passageway means; c. secondary piston means slidably fitted for upward and downward movement inside said primary piston means and said tank means; and d. resilient means fitted inside said primary piston and said secondary piston means for biasing said primary piston means away from said secondary piston means.
Claim 2
Dependent Claim
86 words
A finger-operated spray pump assembly comprising: a. tank means having a bottom end and a top end; b. primary piston means slidably fitted for upward and downward movement in said tank means, said primary piston means having liquid passageway means; c. secondary piston means slidably fitted for upward and downward movement inside said primary piston means and said tank means; and d. resilient means fitted inside said primary piston and said secondary piston means for biasing said primary piston means away from said secondary piston means.
Claim 3
Dependent Claim
30 words
The pump assembly of claim 1 wherein said tank means has valve means associated therewith to prevent the back flow of liquid from said tank means to suction tube means.
Claim 4
Dependent Claim
29 words
The pump assembly of claim 1 wherein said secondary piston means has annular scaling collar means for forming a seal with the inner wall of said primary piston means.
Claim 5
Dependent Claim
28 words
The pump assembly of claim 1 wherein said primary piston means has annular scaling collar means for forming a seal with the inner wall of said tank means.
Claim 6
Dependent Claim
28 words
The pump assembly of claim 1 wherein sand tank means has an internal cross-sectional area in a plane perpendicular to the directional movement of said primary piston means.
Claim 7
Dependent Claim
25 words
The pump assembly of claim 5 wherein said primary piston means and said secondary piston means are coaxially disposed for movement in the opposite direction.
Claim 8
Dependent Claim
22 words
The pump assembly of claim 5 wherein said liquid passageway means is located in the side wall of said primary piston means.
Claim 9
Dependent Claim
15 words
The pump assembly of claim 2 wherein said valve means comprises a flat, circular disc.
Claim 10
Dependent Claim
18 words
The pump assembly of claim 1 wherein said primary piston means has swirl chamber means integrally molded therewith.
Claim 11
Dependent Claim
18 words
The pump assembly of claim 9 wherein said swirl chamber means is connected to said liquid passageway means.
Claim 12
Dependent Claim
42 words
The pump assembly of claim 9 wherein said swirl chamber means includes a circular channel means connected to said passageway means, a circular chamber means, and a series of radial channel means connecting said circular channel means to said circular chamber means.
Claim 13
Dependent Claim
30 words
The pump assembly of claim 9 wherein said primary piston means has a flat key means at the upper end thereof to align actuator means with said swirl chamber means.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |