Patent US5139281A successfully refreshed from Google Patents.
US3559765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication meter valve
Assignee: Lubriquip Inc
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Filing: 1968-03-21
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Granted: 1971-02-02
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Expires: 1988-03-21
Abstract
Abstract A meter valve is described comprising a cylindrical body with a central bore drilled from one end having a cooperating sealingly slidable spring-biased piston therein and having a ball check valve permitting one-way communication between the bore and the end of the body opposite the open or inlet end. The bore has a circular groove in it. The piston is slidable to alternatively block communication (1) between the groove and the inlet end of the bore, and (2) between the groove and the ball check valve. Movement of the piston away from the ball check valve creates a substantial vacuum which is used to boil lubricant out of the groove and eventually force it out through the check valve.
Inventors
- 👤 Roy B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
F; F16; F16N; F16N27/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
An improved lubrication metering device of the type having: a. a body with a cylindrical bore therein, the bore having an inlet end and an outlet end, the bore having a circular groove therein intermediate its ends; b. a cavityless imperforate piston sealingly slidable in the bore positioned alternatively, 1. to block communication between the inlet end and the groove while permitting communication between the outlet end and the groove, and 2. to block communication between the outlet end and the grove while permitting communication between the groove and the inlet end; and c. a check valve at the outlet end; whereby a substantial vacuum may be created at the outlet end of the bore for closing the check valve and for causing a lubricant in the groove to boil and whereby movement of the lubricant from the groove is thereby enhanced.
Claim 2
Dependent Claim
142 words
An improved lubrication metering device of the type having: a. a body with a cylindrical bore therein, the bore having an inlet end and an outlet end, the bore having a circular groove therein intermediate its ends; b. a cavityless imperforate piston sealingly slidable in the bore positioned alternatively, 1. to block communication between the inlet end and the groove while permitting communication between the outlet end and the groove, and 2. to block communication between the outlet end and the grove while permitting communication between the groove and the inlet end; and c. a check valve at the outlet end; whereby a substantial vacuum may be created at the outlet end of the bore for closing the check valve and for causing a lubricant in the groove to boil and whereby movement of the lubricant from the groove is thereby enhanced.
Claim 3
Dependent Claim
70 words
to block communication between the outlet end and the grove while permitting communication between the groove and the inlet end; and c. a check valve at the outlet end; whereby a substantial vacuum may be created at the outlet end of the bore for closing the check valve and for causing a lubricant in the groove to boil and whereby movement of the lubricant from the groove is thereby enhanced.
Claim 4
Dependent Claim
70 words
to block communication between the outlet end and the grove while permitting communication between the groove and the inlet end; and c. a check valve at the outlet end; whereby a substantial vacuum may be created at the outlet end of the bore for closing the check valve and for causing a lubricant in the groove to boil and whereby movement of the lubricant from the groove is thereby enhanced.
Claim 5
Dependent Claim
174 words
A metering unit suitable for nonfree flowing lubricants comprising: a. a body having a bore therein, the bore including a piston cylinder, the body having an annular groove in said cylinder intermediate the ends of the cylinder, the body also having an inlet communicating with one end of the cylinder and an outlet communicAting with the other end; b. a substantially cavityless, imperforate piston sealingly slidable in the cylinder, the piston being alternatively positionable (1) to block communication between the groove and the inlet while permitting communication between the groove and the outlet, and (2) to block communication between the groove and the outlet while permitting communication between the groove and the inlet; c. a check valve at the outlet permitting flow of the body; and d. resilient means urging the piston away from the outlet and thereby closing the check valve wherein a substantial vacuum may be created at the outlet end of the cylinder for causing nonfree flowing lubricant to boil out of the groove into the outlet end of the cylinder.
Claim 6
Dependent Claim
174 words
A metering unit suitable for nonfree flowing lubricants comprising: a. a body having a bore therein, the bore including a piston cylinder, the body having an annular groove in said cylinder intermediate the ends of the cylinder, the body also having an inlet communicating with one end of the cylinder and an outlet communicAting with the other end; b. a substantially cavityless, imperforate piston sealingly slidable in the cylinder, the piston being alternatively positionable (1) to block communication between the groove and the inlet while permitting communication between the groove and the outlet, and (2) to block communication between the groove and the outlet while permitting communication between the groove and the inlet; c. a check valve at the outlet permitting flow of the body; and d. resilient means urging the piston away from the outlet and thereby closing the check valve wherein a substantial vacuum may be created at the outlet end of the cylinder for causing nonfree flowing lubricant to boil out of the groove into the outlet end of the cylinder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |