US3752604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump valve assembly
Assignee: Superior Manufacturing Co
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Filing: 1971-07-19
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Granted: 1973-08-14
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Expires: 1991-07-19
Abstract
Abstract A barrel pump valve assembly including a piston slidably carried by a piston rod. An O-ring seal for contacting the pump cylinder wall is supported between the piston and a disc attached to the piston rod, and the O-ring and piston move longitudinally toward and away from the disc to close and open the valve, respectively. When the O-ring is away from the disc, fluid can pass between the disc and O-ring and through openings in the piston, and when the O-ring is in contact with the disc, the valve is closed.
Inventors
- 👤 C Dorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B53/10; F04B53/12; F04B53/122; B; B67; B67D; B67D7/00; B67D7/06; B67D7/58; B67D7/62; B67D7/64; B67D7/645
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A pump valve assembly of the type for use in a pump having an elongated cylinder including: a piston rod; a piston adapted for limited sliding movement relative to the piston rod near one end of the piston rod, said piston having an opening therethrough for passage of fluid and having a recessed groove about its periphery for receiving a sealing means; a disc attached to the piston rod below the piston; and an annular sealing means in said groove in the piston; said annular sealing mEans being adapted to contact the disc and to prevent flow of fluid through the valve assembly during movement of the piston rod in a first direction and said sealing means being adapted to move away from said disc during movement of the piston rod in a second direction, thereby allowing fluid to flow between the disc and the sealing means and through the opening in the piston.
Claim 2
Dependent Claim
154 words
A pump valve assembly of the type for use in a pump having an elongated cylinder including: a piston rod; a piston adapted for limited sliding movement relative to the piston rod near one end of the piston rod, said piston having an opening therethrough for passage of fluid and having a recessed groove about its periphery for receiving a sealing means; a disc attached to the piston rod below the piston; and an annular sealing means in said groove in the piston; said annular sealing mEans being adapted to contact the disc and to prevent flow of fluid through the valve assembly during movement of the piston rod in a first direction and said sealing means being adapted to move away from said disc during movement of the piston rod in a second direction, thereby allowing fluid to flow between the disc and the sealing means and through the opening in the piston.
Claim 3
Dependent Claim
20 words
The pump valve assembly of claim 1 wherein the annular sealing means is an O-ring formed of a resilient material.
Claim 4
Dependent Claim
20 words
The pump valve assembly of claim 2 wherein the recessed groove in the piston supports the O-ring against inward movement.
Claim 5
Dependent Claim
29 words
The pump valve assembly of claim 3 wherein the piston rod has a section of reduced diameter and the piston is slidably carried on said section of reduced diameter.
Claim 6
Dependent Claim
52 words
The pump valve assembly of claim 4 wherein the sliding movement of the piston on the section of the piston rod having a reduced diameter is limited in one direction by a shoulder formed at the juncture of the piston rod and the section of the piston rod having a reduced diameter.
Claim 7
Dependent Claim
22 words
The pump valve assembly of claim 5 wherein the piston has a plurality of openings adapted to allow passage of fluid therethrough.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |