US4645350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Densitometer
Assignee: X-Rite Europe GmbH
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Filing: 1985-08-08
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Granted: 1987-02-24
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Expires: 2005-08-08
Abstract
Abstract A densitometer is described which is equipped with an extendable and retractable measuring head driven by an electric motor. In the retracted rest position, a measuring diaphragm is visible to the user and the instrument may be positioned. In the extended working position the measuring head covers the measuring diaphragm. By means of the electric drive of the measuring head, the risk of erroneous positioning is avoided.
Inventors
- 👤 Markus Weidmann
- 👤 Hans Ott
- 👤 Wilhelm H. Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/59; G01N21/5907
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A densitometer, comprising: a housing having a flat support surface and adapted to rest on a flat measuring surface; a measuring carriage movably mounted in said housing; a measuring head mounted on said carriage and movable therewith; a drive motor mounted on said carriage and movable therewith; means connected to said drive motor for moving said carriage so that said measuring head moves to and from a rest position to a working position, said means disposed so that said measuring head remains essentially motionless in the working position with the drive motor running; and a measuring diaphragm connected to said housing for positioning said housing on said measuring surface, said measuring diaphragm being visible to a user in the rest position of said measuring head, but being covered by said carriage in the working position of said measuring head.
Claim 2
Dependent Claim
139 words
A densitometer, comprising: a housing having a flat support surface and adapted to rest on a flat measuring surface; a measuring carriage movably mounted in said housing; a measuring head mounted on said carriage and movable therewith; a drive motor mounted on said carriage and movable therewith; means connected to said drive motor for moving said carriage so that said measuring head moves to and from a rest position to a working position, said means disposed so that said measuring head remains essentially motionless in the working position with the drive motor running; and a measuring diaphragm connected to said housing for positioning said housing on said measuring surface, said measuring diaphragm being visible to a user in the rest position of said measuring head, but being covered by said carriage in the working position of said measuring head.
Claim 3
Dependent Claim
44 words
A densitometer as set forth in claim 1, wherein the measuring head includes: a rotatable filter wheel having a plurality of different measuring filters disposed therein; and means connected to said filter wheel for causing rotation of said filter wheel by said drive motor.
Claim 4
Dependent Claim
31 words
A densitometer as set forth in claim 2, wherein said means connected to said filter wheel causes the filter wheel to perform at least one complete rotation during a measuring period.
Claim 5
Dependent Claim
39 words
A densitometer as set forth in claim 1, and further comprising: a slotted follower element disposed on said carriage for being driven by said drive motor over a circular path; and a stationary slotted link mounted on said housing.
Claim 6
Dependent Claim
31 words
A densitometer, as set forth in claim 1, and further including: a slide rod fastened to said housing; and means on said carriage for guiding said carriage along said slide rod.
Claim 7
Dependent Claim
31 words
A densitometer, as set forth in claim 2, and further including: a slide rod fastened to said housing; and means on said carriage for guiding said carriage along said slide rod.
Claim 8
Dependent Claim
31 words
A densitometer, as set forth in claim 3, and further including: a slide rod fastened to said housing; and means on said carriage for guiding said carriage along said slide rod.
Claim 9
Dependent Claim
31 words
A densitometer, as set forth in claim 4, and further including: a slide rod fastened to said housing; and means on said carriage for guiding said carriage along said slide rod.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |