Geometrical instruments – Gauge – Comparator
Patent
1994-05-02
1995-12-05
Fulton, Christopher W.
Geometrical instruments
Gauge
Comparator
33542, 33199R, G01B 330, G01B 348
Patent
active
054717574
ABSTRACT:
The invention is of a thread indication kit for use in determining the specification diameter and thread density of a threaded in-take orifice of a spin-on filter, such as the traditional oil filter used in motor vehicles. The kit includes a groups of sizing tabs, each of which includes a sizing lobe. The sizing lobe is a blade-like member with parallel and spaced edges separated by a distance which corresponds to the thread crest-to-thread crest distance of diametrically opposed points within an in-take orifice of an oil filter. Displayed on each sizing tab is indicia which indicates the specification diameter of the intake orifice which exhibits the thread crest-to-thread crest distance corresponding to the lobe dimension of the sizing tab. Applicant's kit also includes a thread gauge which is used to determine the thread density of threaded orifices. The combination of specification in-take orifice diameter and thread density allows one to properly replace a spin-on filter (at least with respect to proper fitting at the in-take orifice) having only the to-be-replaced filter as a guide.
REFERENCES:
patent: 318051 (1885-05-01), Starrett
patent: 552238 (1895-12-01), Darling
patent: 987703 (1911-03-01), Curtin
patent: 1107276 (1914-08-01), Farrington
patent: 1465920 (1923-08-01), Francis
patent: 1721600 (1929-07-01), Leschen
patent: 2715281 (1955-08-01), Black
patent: 4329783 (1982-05-01), Maresca
patent: 4987768 (1991-01-01), Dimmick et al.
patent: 5042161 (1991-08-01), Hodge
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