IP Library Granted Patent US 12,644,750
Granted Patent B2
US 12,644,750 · App. 18/566,731 · Granted Jun 2, 2026

Device for indicating a fluid level

Inventor: Martin Schmitt (Knopp-Labach, DE)
Assignee: HYDAC ACCESSORIES GMBH
G01F23/02
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Quick Facts
Patent No.
US 12,644,750
App. No.
18/566,731
Granted
Jun 2, 2026
Kind
B2
Abstract

The invention relates to a device for indicating a fluid level in a storage tank, which device can be connected to the storage tank by means of two fluid connections vertically spaced apart from each other, the device consisting of three components which can be clipped to each other, in the form of: —a base part ( 12 ) for fastening to the storage tank: —a housing part ( 14 ) for indicating a fluid level ( 16 ) corresponding to the contents of the storage tank, the housing part being designed as a riser pipe; and —a closure part ( 18 ) for sealing off the interior ( 20 ) of the housing part ( 14 ) from the environment.

Claims (34)

1 . A device for indicating a fluid level in a storage tank, which device is connectable to the storage tank using two fluid connections vertically spaced apart from each other, the device consisting essentially of three components which are configured to be clipped to one another in the form of:

a base part for fastening to the storage tank;

a housing part configured as a riser pipe for indicating a fluid level corresponding to the contents of the storage tank; and

a closure part for sealing off the interior of the housing part from the environment; wherein

a clip connection is formed of a locking hook of a first component of the three components, which engages in a locking recess of a second component of the three components.

2 . The device of claim 1 , wherein the housing part has a further recess, which further recesses is configured in the manner of an elongated hole.

3 . The device of claim 1 , wherein the closure part is formed of a plug which closes off the housing part towards one side, whereas the housing part is closed on its side opposite thereto by wall parts of the housing part.

4 . The device of claim 3 , wherein at least one of the two fluid connections is formed of a hollow screw which passes through both the housing part as well as the base part and the tank wall of the storage tank and is sealed by ring seals at least with respect to the tank wall and the housing part.

5 . The device of claim 1 , wherein the housing part is transparent for visual observation of the fluid level and comprises a cavity for receiving a fluid which determines the fluid level.

6 . The device of claim 5 , wherein the closure part is formed of a plug which closes off the housing part towards one side, whereas the housing part is closed on its side opposite thereto by wall parts of the housing part.

7 . The device of claim 5 , wherein at least one of the two fluid connections is formed of a hollow screw which passes through both the housing part as well as the base part and the tank wall of the storage tank and is sealed by ring seals at least with respect to the tank wall and the housing part.

8 . The device of claim 1 , wherein the base part has a rear wall extending flush at the rear which is at a distance from an assignable tank wall of the storage tank in the mounted state and which, protruding towards the housing part, has a retaining edge with the locking recess for clipping to the locking hook.

9 . The device of claim 8 , wherein the housing part is transparent for visual observation of the fluid level and comprises a cavity for receiving a fluid which determines the fluid level.

10 . The device of claim 8 , wherein the closure part is formed of a plug which closes off the housing part towards one side, whereas the housing part is closed on its side opposite thereto by wall parts of the housing part.

11 . The device of claim 8 , wherein at least one of the two fluid connections is formed of a hollow screw which passes through both the housing part as well as the base part and the tank wall of the storage tank and is sealed by ring seals at least with respect to the tank wall and the housing part.

12 . The device of claim 1 , wherein at least one of the two fluid connections is formed of a hollow screw which passes through both the housing part as well as the base part and the tank wall of the storage tank and is sealed by ring seals at least with respect to the tank wall and the housing part.

13 . The device of claim 12 , wherein the housing part has, on its free end face opposite the rear wall of the base part, an indentation on which the hollow screw rests with its screw head via a ring seal; and wherein the respective hollow screw penetrates a further recess in the region of the indentation, which recess is aligned with the assignable recess in the base part.

14 . The device of claim 12 , wherein the closure part has an annular recess through which the hollow screw passes, said hollow screw engaging in the storage tank above the fluid level therein.

15 . The device of claim 14 , wherein the rear wall of the base part is penetrated by recesses for the respective hollow screw which recesses, as annular receptacles, protrude towards the housing part.

16 . The device of claim 14 , wherein the housing part has, on its free end face opposite the rear wall of the base part, an indentation on which the hollow screw rests with its screw head via a ring seal; and wherein the respective hollow screw penetrates a further recess in the region of the indentation, which recess is aligned with the assignable recess in the base part.

17 . The device of claim 12 , wherein the rear wall of the base part is penetrated by recesses for the respective hollow screw which recesses, as annular receptacles, protrude towards the housing part.

18 . The device of claim 17 , wherein the housing part has, on its free end face opposite the rear wall of the base part, an indentation on which the hollow screw rests with its screw head via a ring seal; and wherein the respective hollow screw penetrates a further recess in the region of the indentation, which recess is aligned with the assignable recess in the base part.

19 . A device for indicating a fluid level in a storage tank, which device is connectable to the storage tank using two fluid connections vertically spaced apart from each other, the device consisting essentially of three components which are configured to be clipped to one another in the form of:

a base part for fastening to the storage tank;

a housing part configured as riser pipe for indicating a fluid level corresponding to the contents of the storage tank; and

a closure part for sealing off the interior of the housing part from the environment; wherein

a clip connection is formed of a locking hook of a first component of the three components, which engages in a locking recess of a second component of the three components; and wherein

the base part has a rear wall extending flush at the rear which is at a distance from an assignable tank wall of the storage tank in the mounted state and which, protruding towards the housing part, has a retaining edge with the locking recess for clipping to the locking hook.

20 . A device for indicating a fluid level in a storage tank, which device is connectable to the storage tank using two fluid connections vertically spaced apart from each other, the device consisting essentially of three components which are configured to be clipped to one another in the form of:

a base part for fastening to the storage tank;

a housing part configured as a riser pipe for indicating a fluid level corresponding to the contents of the storage tank; and

a closure part for sealing off the interior of the housing part from the environment; wherein

a clip connection is formed of a locking hook of a first component of the three components, which engages in a locking recess of a second component of the three components; wherein

at least one of the two fluid connections is formed of a hollow screw which passes through the housing part as well as the base part and is configured to pass a tank wall of the storage tank and is sealable by ring seals at least with respect to the housing part.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 3, 2024
From: SCHMIDT, MARTIN
To: HYDAC ACCESSORIES GMBH
Reel/Frame 067311/0572 →
Priority Claims (1)
DE 10 2021 002 969.0 · Jun 10, 2021 · national
Continuity (1)
Related Publication 20240263987A1 · Aug 8, 2024
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