US4709722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve apparatus for crankcase oil drainage
Assignee: Individual
•
Filing: 1986-09-22
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Granted: 1987-12-01
•
Expires: 2006-09-22
Abstract
Abstract Valve apparatus for draining oil from a vehicle crankcase includes a valve body having a pair of intersecting bores. One of the bores communicates with the vehicle crankcase and receives oil therefrom. A tubular insert extends into the intersecting bore, with part of the insert extending outwardly from the valve body. The end of the insert which is disposed within the valve body comprises a valve seat, and a spring-loaded ball check is disposed within the tubular insert. The spring biases the ball against the seat until low pressure is applied to the insert to withdraw the ball from the seat. When the ball is withdrawn from the seat, oil is drained from the crankcase. A hose or tube is secured to the end of the insert outside of the valve body and is appropriately connected to a source of low pressure for draining the oil.
Inventors
- 👤 Paul A. Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:53
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/044; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7856; Y10T137/7904; Y10T137/7922; Y10T137/7927
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
Drain valve apparatus for draining a fluid from a reservoir, comprising, in combination: valve body means, including a valve body securable to a reservoir to be drained, first bore means in the valve body communicating with the fluid to be drained, and second bore means in the valve body communicating with the first bore means, and a threaded portion for securing the valve body to a threaded drain opening of the reservoir to be drained; and insert means secured to the valve body means and extending into the second bore means and out of the valve body means, including a tube having a first end for receiving the fluid from the first bore means, a valve seat in the tube at the first end, a ball in the tube, spring means for biasing the ball against the seat, and connector means extending outwardly from the valve body means for connecting the tube to a conduit for receiving the fluid from the first bore means when the ball is moved off the valve seat.
Claim 2
Dependent Claim
173 words
Drain valve apparatus for draining a fluid from a reservoir, comprising, in combination: valve body means, including a valve body securable to a reservoir to be drained, first bore means in the valve body communicating with the fluid to be drained, and second bore means in the valve body communicating with the first bore means, and a threaded portion for securing the valve body to a threaded drain opening of the reservoir to be drained; and insert means secured to the valve body means and extending into the second bore means and out of the valve body means, including a tube having a first end for receiving the fluid from the first bore means, a valve seat in the tube at the first end, a ball in the tube, spring means for biasing the ball against the seat, and connector means extending outwardly from the valve body means for connecting the tube to a conduit for receiving the fluid from the first bore means when the ball is moved off the valve seat.
Claim 3
Dependent Claim
54 words
The apparatus of claim 1 in which the first bore means comprises a first bore portion in the valve body, and the second bore means comprises a second bore portion communicating with the first bore portion for receiving the insert means, and the fluid flows into the sleeve means from the first bore portion.
Claim 4
Dependent Claim
36 words
The apparatus of claim 1 in which the first bore means comprises a first bore in the valve body and the second bore means comprises a second bore in the valve body intersecting the first bore.
Claim 5
Dependent Claim
36 words
The apparatus of claim 1 in which the insert means further includes the first end of the tube disposed within the valve body and a second end of the tube disposed out of the valve body.
Claim 6
Dependent Claim
31 words
The apparatus of claim 4 in which the first end of the a insert means includes an inwardly extending portion, and the valve seat is disposed at the inwardly extending portion.
Claim 7
Dependent Claim
20 words
The apparatus of claim 4 in which the connector means is disposed at the second end of the insert means.
References Cited (Backward Citations)
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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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |