US3854826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid applicator pressure control device
Assignee: Artex Hobby Products Inc
•
Filing: 1973-12-26
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Granted: 1974-12-17
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Expires: 1993-12-26
Abstract
Abstract In combination with a fluid applicator of the fluid marker type, a deformable plug for sealing within the interior of the applicator the fluid from a pressure means and transferring pressure toward and away from the fluid.
Inventors
- 👤 P Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:04
CPC Classifications
B; B43; B43K; B43K7/00; B43K7/02; B43K7/03; B43K7/035
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
In a fluid applicator having a hollow elongated body, a marking fluid chamber within the body for containing a quantity of the marking fluid, a pumped fluid chamber within the body, separator means for separating the chambers, a pump in communication with the pumped fluid chamber and a tip in communication with the marking fluid chamber, an improvement comprising separator means including a deformable plug means having: a. a wall bearing section proportioned to be substantially in sealed engagement with the interior walls of said body for sealing said marking fluid chamber from said pumped fluid chamber; b. a pressure transfer section connected to and movable relative to said wall bearing section for transferring pressures to and from fluids in said fluid chambers, the wall bearing and pressure transfer sections being formed so that changes in pressure cause said pressure transfer section to move prior to movement of said wall bearing section in response to pressure changes.
Claim 2
Dependent Claim
157 words
In a fluid applicator having a hollow elongated body, a marking fluid chamber within the body for containing a quantity of the marking fluid, a pumped fluid chamber within the body, separator means for separating the chambers, a pump in communication with the pumped fluid chamber and a tip in communication with the marking fluid chamber, an improvement comprising separator means including a deformable plug means having: a. a wall bearing section proportioned to be substantially in sealed engagement with the interior walls of said body for sealing said marking fluid chamber from said pumped fluid chamber; b. a pressure transfer section connected to and movable relative to said wall bearing section for transferring pressures to and from fluids in said fluid chambers, the wall bearing and pressure transfer sections being formed so that changes in pressure cause said pressure transfer section to move prior to movement of said wall bearing section in response to pressure changes.
Claim 3
Dependent Claim
21 words
The applicator according to claim 1 wherein said pressure transfer section is a flexible diaphragm connected to said wall bearing section.
Claim 4
Dependent Claim
22 words
The applicator according to claim 2 wherein said hollow elongated body is substantially cylindrical and said wall bearing section is a cup.
Claim 5
Dependent Claim
103 words
The applicator according to claim 3 wherein said diaphragm has a maximum extension toward and away from said marking fluid whereby as pressure in said pressure chamber is increased above that of said marking fluid chamber, the diaphragm will move toward said marking fluid to equalize pressure between the chambers until it reaches its maximum extension and as pressure is reduced in said pressure chamber below that of said marking fluid chamber, said diaphragm will move away from said marking fluid to equalize pressure between the chambers until said diaphragm reaches its maximum extension, said movement occurring without substantial movement of said cup.
Claim 6
Dependent Claim
50 words
The applicator according to claim 4 wherein as marking fluid is withdrawn from said marking fluid chamber after said diaphragm has reached its maximum extension toward said marking fluid and substantial pressure relative said marking fluid is maintained in said pressure chamber, said entire plug will move toward said fluid.
Claim 7
Dependent Claim
46 words
The applicator according to claim 5 wherein as pressure in said pumped chamber is maintained substantially below that of said marking fluid chamber after said diaphragm has reached its maximum extension away from said marking fluid, said entire plug will move away from said marking fluid.
Claim 8
Dependent Claim
67 words
The applicator according to claim 3 wherein as pressure in said pumped fluid chamber is initially reduced below that of the marking fluid chamber said diaphragm moves away from said marking fluid until it reaches its maximum extension without substantial movement of the cup such that an increased response time occurs in transferring a reduction in pressure from the pumped fluid chamber to the marking fluid chamber.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |