Liquid purification or separation – With repair or assembling means – Hoist or handle means
Reexamination Certificate
1999-11-05
2001-08-28
Savage, Matthew O. (Department: 1723)
Liquid purification or separation
With repair or assembling means
Hoist or handle means
C210S443000, C210S470000, C210SDIG009, C081S176150, C081S461000
Reexamination Certificate
active
06280620
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to devices for inserting, tightening and removing oil filters from internal combustion engines with oil filters.
2. Description of the Prior Art
Replacement of an oil filter is an integral part of the proper maintenance on all motor vehicle, boat and private aircraft engines. Current oil filters require the use of a separate oil filter removal tool such as a strap type metal wrench, or a socket wrench which can be inserted into a socket wrench may be required. The use of such tools becomes more and more difficult as more and more equipment is inserted into the engine compartment of automotive vehicle, boat and private aircraft engine compartments.
The prior art discloses designs for oil filter canisters intended to facilitate installation and removal. U.S. Pat. No. 5,744,032 to Kemper discloses a molded attachment with fins which can be molded into the canister itself or sold as separate attachment. U.S. Pat. No. 5,024,760 to Kemper also discloses fins attached to the oil filter. U.S. Pat. No. 5,00,847 to Huang discloses an oil filter body with several types of fixtures attached to the top of the canister including a straight handle, a graspable hollow handle and a rectangular cam. U.S. Pat. No. 4,364,829 to Atkins discloses a cylinder into which the oil filter is placed wherein the cylinder will accept two handles for turning the cylinder and where one handle is fixed and the other handle has folding components. The cylinder of the 829 disclosure also accepts a standard socket wrench for turning the cylinder. U.S. Pat. No. 4,266,452 discloses a cylindrical cap with two intersecting grooves for accepting a bar which can be used to turn the cylindrical cap.
What is needed beyond the prior art is a design modification to the body of an oil filter which would allow easy installation and removal using a standard key tool for turning the oil filter.
SUMMARY OF THE INVENTION
The present invention meets the needs identified above by providing an oil filter body with two protruding female tabs positioned to rest flush with the top edge of the oil filter. A plastic key unit designed to fit over the top of the oil filter has two male posts which correspond to and are capable of fitting into the filter's protruding female tabs. The key has a handle-like grip providing the user with a secure and comfortable grasp on the tool.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of a preferred embodiment of the invention, as illustrated in the accompanying drawings wherein like reference numbers represent like parts of the invention.
REFERENCES:
patent: D. 264614 (1982-05-01), Johnson, Sr.
patent: 4266452 (1981-05-01), Crist
patent: 4364829 (1982-12-01), Atkins et al.
patent: 5000847 (1991-03-01), Huang
patent: 5024760 (1991-06-01), Kemper
patent: 5328606 (1994-07-01), Warren et al.
patent: 5744032 (1998-04-01), Kemper
patent: 1532437 (1968-06-01), None
Savage Matthew O.
Siegesmund Rudolf O.
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