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Patent US3615868A successfully refreshed from Google Patents.
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US3615868A Expired / Lapsed US ⏱️ 0.0 years remaining

Battery cap assembly

Assignee: Illinois Tool Works Inc
•
Filing: 1970-02-20
•
Granted: 1971-10-26
•
Expires: 1990-02-20
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Abstract

Abstract The present invention relates generally to combined battery cap and liquid level indicators and more particularly to such assemblies wherein the liquid level indicator comprises an elongate or rodlike body of light transmitting material. The embodiment of the invention disclosed herein includes a centrally apertured cap member having an annular valve seat with the elongate indicator member supported by and extending through the cap member. The outer extremity of the rodlike member provides a light receiving surface and the lower extremity is adapted for immersion within a battery fluid. An axially deflectable annular valve member is secured to and radiates from the indicator periphery, the valve member being normally biased into sealing engagement with the annular seat and arranged to preclude leakage of liquid through the assembly into an associated battery.

Inventors

  • 👤 Robert Richard Melone

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 23:39
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/292; G01F23/2921; G01F23/2922; H; H01; H01M; H01M10/00; H01M10/42; H01M10/48; H01M10/484; H01M50/00; H01M50/60; H01M50/609; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8359

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 34 words
A battery cap and liquid level indicator assembly as set forth in claim 1, wherein the indicator member is provided with a circumferential groove for accommodating the inner margin of the annular valve member.
Claim 2
Dependent Claim 30 words
A battery cap and liquid level indicator assembly as set forth in claim 1, wherein the vent means includes a liquid drain vent in the sidewall of the cap member.
Claim 3
Dependent Claim 41 words
A battery cap and liquid level indicator assembly as set forth in claim 1, wherein the vent means includes a vent in the upper portion of the cap and a lower drain vent in the vicinity of the annular valve seAt.
Claim 4
Dependent Claim 46 words
A battery cap and liquid level indicator assembly as set forth in claim 1, wherein the annular valve seat is relatively narrow along the area of contact thereof with the underside of the annular valve member whereby to increase the sealing effectiveness of the valve member.
Claim 5
Dependent Claim 67 words
A battery cap and liquid level indicator assembly as set forth in claim 1, wherein the cap member is provided with an annular clamping surface, an externally threaded section below said clamping surface, and a sealing member positioned adjacent said clamping surface to preclude fluid leakage along the outer periphery of the cap member when said cap member is rotatably tightened in position upon a battery casing.
Claim 6
Dependent Claim 47 words
A battery cap and liquid level indicator assembly as set forth in claim 1, wherein annularly disposed baffle means is provided within the cap member to counteract the tendency for liquid within an associated battery from entering the area in which the annular valve member is located.
Claim 7
Dependent Claim 38 words
A battery cap and liquid level indicator assembly as set forth in claim 7, wherein the baffle means is arranged to form a labyrinth passage between the lower portion of the cap member and the annular valve member.
Claim 8
Dependent Claim 40 words
A battery cap and liquid level indicator assembly as set forth in claim 7, wherein the baffle means includes axially spaced baffle members forming a labyrinth passage between the lower portion of the cap member and the annular valve member.
Claim 9
Dependent Claim 51 words
A battery cap and liquid level indicator assembly as set forth in claim 7, wherein the baffle means includes an annular baffle member radiating outwardly from the periphery of the indicator member and a cooperative axially spaced annular baffle member extending radially inwardly from an inner surface of the cap member.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-10-25 1975-04-26 1975-10-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-10-25 1979-04-26 1979-10-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-10-25 1983-04-26 1983-10-26 $7700.00 Window Closed / Lapsed

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