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US4575258A Expired / Lapsed US ⏱️ 0.0 years remaining

Steam trap failure detector

Assignee: Individual
•
Filing: 1984-08-06
•
Granted: 1986-03-11
•
Expires: 2004-08-06
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Abstract

Abstract Detector apparatus adaptably mountable about the external surface of steam pipes and condensate pipes, and wherein the apparatus includes a curved temperature sensitive bi-metallic element fixedly mounted at one end and with the opposed end being free to flex. A push arm is mounted at the free end of the bi-metallic element in engagement with a temperature indicating element for indicating a temperature either within or outside of a range of desired maximums and minimums, utilizing calibrated reference in the form of a rotatable dial. The surface temperature of the steam or condensate pipe being monitored is determined. The apparatus is provided with mounting member or system capable of use in combination with cylindrical surfaces within a range of diameters.

Inventors

  • 👤 Donald E. Wall

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 07:42
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/38; F16T1/48; G; G01; G01K; G01K5/00; G01K5/48; G01K5/56; G01K5/62; G01K5/70; G01M; G01M3/00; G01M3/002

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 136 words
Thermal responsive apparatus comprising: (a) an arcuately curved bi-metallic strip comprising a temperature sensing element mounted with one end thereof receiving a rotatable axle and one end being a free end, with said sensing element being fixedly coupled to said rotatable axle, and with the free end thereof being mounted adjacent a temperature variable surface and with a disc means coupled to said rotatable axle and being free to rotate; (b) a push arm having one end coupled to the free end of said sensing element and its opposed end coupled to said disc means, and a temperature indicating means being disposed on said disc means; (c) a temperature indicating arm frictionally mounted to said rotatable axle, whereby the sensed temperature variations are indicated relative to the temperature indicating means coaxially mounted on said rotatable axle.
Claim 2
Dependent Claim 136 words
Thermal responsive apparatus comprising: (a) an arcuately curved bi-metallic strip comprising a temperature sensing element mounted with one end thereof receiving a rotatable axle and one end being a free end, with said sensing element being fixedly coupled to said rotatable axle, and with the free end thereof being mounted adjacent a temperature variable surface and with a disc means coupled to said rotatable axle and being free to rotate; (b) a push arm having one end coupled to the free end of said sensing element and its opposed end coupled to said disc means, and a temperature indicating means being disposed on said disc means; (c) a temperature indicating arm frictionally mounted to said rotatable axle, whereby the sensed temperature variations are indicated relative to the temperature indicating means coaxially mounted on said rotatable axle.
Claim 3
Dependent Claim 33 words
The thermal responsive apparatus as defined in claim 1 being particularly characterized in that resilient spring means are provided for releasably securing said thermal responsive apparatus to a heated surface of cylindrical configuration.
Claim 4
Dependent Claim 32 words
The thermal responsive apparatus as defined in claim 1 being particularly characterized in that a plurality of radially spaced bores are formed in said disc means to receive said push arm therewithin.

References Cited (Backward Citations)

US1498413A Cited
US1883554A Cited
US2368289A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-03-10 1989-09-09 1990-03-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-03-10 1993-09-09 1994-03-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-03-10 1997-09-09 1998-03-11 $7700.00 Window Closed / Lapsed

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