US4752387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for installing a by-pass filter
Assignee: Individual
•
Filing: 1987-09-14
•
Granted: 1988-06-21
•
Expires: 2007-09-14
Abstract
Abstract Adapter for connecting a by-pass oil filter to an internal combustion engine equipped with a full-flow, throw-away, replaceable oil filter. Adapter would form an adjustable clamp band around the annular surface of the full-flow filter and would embody an appropriate penetrating device consisting of a sharpened hollow needle or penetrating pin which would automatically penetrate the annular surface of the full-flow filter when the adapter band is securely tightened, opening up access to a small supply of engine oil to be transferred to the by-pass filter via appropriate connections.
Inventors
- 👤 Albert E. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:59
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/02; B01D35/00; B01D35/14; B01D35/30; B01D2201/00; B01D2201/40; B01D2201/4023
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
In a filtering system for the lubricant of a machine having a lubricant pump connected directly to a full flow filter having an outer housing receiving said lubricant and passing it thence through a filter media, said system also having a by-pass filter having an inlet and an outlet; the improvement of an annular band surrounding and tightenable against said full flow filter, a pressure lubricant take off unit secured to said band and pressing against said full flow filter by the tightening effect of said band, said unit including a hollow needle penetrating said housing and conducting said lubricant to the exterior of said housing; said system including means to conduct said lubricant from said unit to said by-pass filter, and further means to conduct said lubricant from said by-pass filter to an area of lesser pressure than that produced by said pump.
Claim 2
Dependent Claim
144 words
In a filtering system for the lubricant of a machine having a lubricant pump connected directly to a full flow filter having an outer housing receiving said lubricant and passing it thence through a filter media, said system also having a by-pass filter having an inlet and an outlet; the improvement of an annular band surrounding and tightenable against said full flow filter, a pressure lubricant take off unit secured to said band and pressing against said full flow filter by the tightening effect of said band, said unit including a hollow needle penetrating said housing and conducting said lubricant to the exterior of said housing; said system including means to conduct said lubricant from said unit to said by-pass filter, and further means to conduct said lubricant from said by-pass filter to an area of lesser pressure than that produced by said pump.
Claim 3
Dependent Claim
23 words
The improvement of claim 1 wherein said needle has a sharpened edge whereby the needle cuts its way into the full flow filter.
Claim 4
Dependent Claim
25 words
The improvement of claim 2 wherein the face of the cutting portion of said needle is hollow ground to increase the sharpness of said edge.
Claim 5
Dependent Claim
24 words
The improvement of claim 1 wherein said unit has a sealing washer surrounding said needle and sealing said unit to said full flow filter.
Claim 6
Dependent Claim
16 words
The improvement of claim 1 wherein the needle of said unit is fixed to said unit.
Claim 7
Dependent Claim
39 words
The improvement of claim 1 wherein the needle of said unit is movable relatively to said unit by an external operating means, whereby the needle may be forced into said full flow filter after said band has been tightened.
Claim 8
Independent Claim
167 words
A method of installing a by-pass lubricant filter for a machine having a high pressure lubricant pump and a means to install a full flow lubricant filter, comprising the steps of installing a full flow filter at said means in a tight and leakproof manner, mounting a lubricant by-pass filter having an inlet and an outlet in the vicinity of said full flow filter, passing a contractable band with a penetrating take-off having an outlet around said full flow filter, orienting said take-off on said full flow filter so that a hose may be routed from the outlet of the take-off to the inlet of the by-pass filter, contracting said band, penetrating the wall of said full flow filter by said take-off and sealing therewith, connecting a pressure hose between the outlet of said take-off and the inlet of said by-pass filter, and installing a means to conduct the filtered lubricant from the outlet of said by-pass filter to a region of low pressure in said machine.
Claim 9
Independent Claim
167 words
A method of installing a by-pass lubricant filter for a machine having a high pressure lubricant pump and a means to install a full flow lubricant filter, comprising the steps of installing a full flow filter at said means in a tight and leakproof manner, mounting a lubricant by-pass filter having an inlet and an outlet in the vicinity of said full flow filter, passing a contractable band with a penetrating take-off having an outlet around said full flow filter, orienting said take-off on said full flow filter so that a hose may be routed from the outlet of the take-off to the inlet of the by-pass filter, contracting said band, penetrating the wall of said full flow filter by said take-off and sealing therewith, connecting a pressure hose between the outlet of said take-off and the inlet of said by-pass filter, and installing a means to conduct the filtered lubricant from the outlet of said by-pass filter to a region of low pressure in said machine.
Claim 10
Dependent Claim
21 words
The method of claim 7 wherein the direct force of the contracting band forces the penetrating take-off into the said wall.
Claim 11
Dependent Claim
37 words
The method of claim 7 wherein the direct force of the contracting band forces the take-off into sealing engagement with said wall, and the further step of penetrating the wall by the take-off by an external force.
References Cited (Backward Citations)
US3981322A
Cited
US4140155A
Cited
US4406784A
Cited
US4452695A
Cited
US4700670A
Cited
US4561395A
Cited
US4638834A
Cited
US4672932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |