AU708471B2

AU708471B2 - Hinge device with locking function for a cover for a gully or a septic tank

Info

Publication number: AU708471B2
Application number: AU52052/96A
Authority: AU
Inventors: Ahti Koskelainen; Morgan Koskelainen
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-02
Filing date: 1996-05-02
Publication date: 1999-08-05
Anticipated expiration: 2016-05-02
Also published as: SE9501605D0; FI961866A0; SE9501605L; FI104507B; SE504370C2; FI961866A; AU5205296A

Description

HINGE DEVICE WITH LOCKING FUNCTION FOR A COVER FOR A GULLY OR A SEPTIC

TANK

The present invention is intended for locking the cover of a gully or a septic tank in closed position, such that a key of special design is required for the opening thereof.

The nature of the device allows the cover to be released from locking, and can be swung sidewards with a substantially reduced force as compared to known methods, which facilitates the handling of heavy concrete covers at the same time as the locking function. The present invention will also release light covers in a satisfactory manner.

This is obtained with a device according to the present invention, which is mainly characterized by a T-shaped tube which is attached to the cover and surrounds, and is rotatable about a vertical, adjustable stanchion, which in turn is fitted to a gully ring cone.

According to another aspect of the present invention, there is disclosed a device for locking and unlocking a cover (16a) of a gully ring (17) or the like, characterised in that the device includes a substantially T-shaped T-tube having an upper section and a body section, the upper section being attached to the cover (16a) and the body section surrounding and rotatable about a standing stanchion The T-tube is prevented from rotating about the standing stanchion by an eccentric within the upper section of the T-tube when the eccentric is in a locked position, the eccentric (1) .being rotatable out of the locked position by means of a key the key having a shaft length which is substantially longer than the radius of the eccentric so that the key acts as a lever, enabling the eccentric to be rotated out of the locked position and the T-tube to be upwardly displaced relative to the stanchion with substantially reduced force.

o According to one embodiment of the present invention there is disclosed the device as described above, further including T-tube rotation preventing means. The T-tube rotation preventing means preferably engages with and prevents the T-tube from rotating about the standing stanchion when the eccentric is in the locked position and disengages from and allows rotation of the T-tube about the stanchion when A I the T-tube is upwardly displaced from the stanchion by means of the key 2136A JRS/JM

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According to another embodiment of the present invention there is disclosed the device substantially as described above characterised in that the eccentric includes a substantially flat upper section capable of mating with a substantially flat upper end of the stanchion when in an unlocked position so as to avoid unintended return from the unlocked position of the eccentric and consequent downward displacement of the Ttube on the stanchion Preferably, the device as described above, further includes a locking device consisting of at least a groove a ball and a spring (12) which together form an arrest between the T-tube and the stanchion which arrest is releasable by means of the key According to yet another embodiment, three is described the device as described above, characterised in that the stanchion is equipped with a spring-loaded plunger (18) arranged to bias the T-tube against the T-tube rotation preventing means and prevent the T-tube from rotating about the stanchion the spring-loaded plunger (18) arranged to be deactivated by means of the key Preferably the stanchion is attached to the gully ring (17) via a transverse shaft (14) :q •which is attached via screws (15) to the gully ring.

Hereinafter the invention will be further described as two preferred embodiments, S. whereby reference is made to the accompanying drawings, in which: i.i: Fig. 1 shows a side view of a complete device applied to a gully cover.

Fig. 2 shows a section along line A-A in Fig. 1 in locked position.

Fig, 3 shows the same section as in Fig. 2, but with the device in opened g oa p o s it i o n Fig. 4 shows a cross section corresponding to Fig. 2 through a second embodiment of a device to the invention in locked position.

S" In Fig. 1 is shown a portion of a gully ring cone (17) with a cover (16a) positioned thereupon. An attachment plate with two ears (13) is bolted to the gully ring, which ears support a transverse shaft which pivotably supports a stanchion arranged substantially in vertical direction, and the 2136A JRS/JM a

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2 vertical of which can be adjusted by means of two adjustment screws 15 provided at opposite sides of the transverse shaft 14. Above the upper part of the stanchion 3 is arranged one shank of a T-tube 2 fitting thereover, and which at the lower part of the same shank has a locking groove 11, which by cooperation with a locking pin 4 engaging therein and arranged on the stanchion 3, can prevent the T-tube 2 from being rotated about the stanchion.

As can be seen from Fig.s 2 and 3 in the transverse portions of the T-tube 2 there is provided a rotatable eccentric 1, S. in one end provided with a key grip 5, whereas the eccentric 1 by means of a pin 9 provided at the other end is rotatable to a limited extent in the T-tube. Diametrically opposed to S15 an eccentric recess in the eccentric 1 there is provided a smaller recess 16, the function of which will be explained later on. By means of a circumferential groove 6 inside the portion of the T-tube arranged around the stanchion and a ball 7 arranged in a channel in the stanchion, which ball is 20 preloaded in a direction outwards by a spring 12, the T-tube 2 is arrested against axial movement along the stanchion.

With a key 8, which fits in the key grip 5 it is possible to S. turn the eccentric 1 in the horizontal portion of the Ttube, whereby the eccentric recess causes the portion of the T-tube arranged around the stanchion to lift after the resistance from the spring-loaded ball 7 has been overcome.

At the same time the locking pin 4 hereby will be brought out of engagement with the locking groove 11, whereupon it is possible to turn the T-tube 2 and the cover 16a fitted thereto about the stanchion 3.

The embodiment according to Fig. 4 differs from that earlier described in that the upper portion of the stanchion has a cylindrical recess in which is axially movable a plunger 18 preloaded by a spring 19 against locking position.

Locking in initial position according to Fig. 2 and Fig. 4.

The upper position of the eccenter 1 means that the stanchion 3 in pushed in position with the locking pin 4 prevents angular rotation of the T-tube 2 in the recess 11, simultaneously as vertical movement is prevented in that the ball/balls 7 is/are pressed into grooves 6, or by spring pressure 12 or by the spring-loaded plunger 18, resp.

Release according to Fig. 3.

The arresting means 4, 11, released in that the T-tube 2 has been displaced upwards when the eccentric by means of the key 8 has been turned through 180°, such as permitted by the pin 9. In this position the cover 16a can be swung sideways when the T-tube 2 released from the locking pin 4 acts as a 15 hinge about the stanchion 3.

The upper point of the eccenter is flattened slightly 16 for giving self-locking against the upper end of the stanchion.

The attachement for the stanchion 3 consists of an attachment plate designed with two ears 13 and a shaft 14 extending laterally through the stanchion 3, and adjustment screws 15 arranged at 90' relative to and on opposite sides of said shaft 14.

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THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS: 1. A device for locking and unlocking a cover (16a) of a gully ring (17) or the like, characterised in that the device includes a substantially T-shaped T-tube (2) having an upper section and a body section, the upper section being attached to the cover (16a) and the body section surrounding and rotatable about a standing stanchion wherein the T-tube is prevented from rotating about the standing stanchion by an eccentric within the upper section of the T-tube when said eccentric is in a locked position, said eccentric (1) being rotatable out of said locked position by means of a key said key (8) having a shaft length which is substantially longer than the radius of the eccentric so that the key acts as a lever, enabling the eccentric to be rotated out of the locked position and the T-tube to be upwardly displaced relative to the stanchion with substantially reduced force.

2. The device as claimed in claim 1, further including T-tube rotation preventing means, said T-tube rotation preventing means engaging with and preventing the T-tube from rotating about the standing stanchion when the eccentric is in the locked position and disengaging from and allowing rotation of the T-tube (2) _about the stanchion when the T-tube is upwardly displaced from the stanchion by means of the key 0•o: :1 3. The device as claimed in either one of claims 1 or 2, characterised in that the eccentric includes a substantially flat upper section capable of mating with a substantially flat upper end of the stanchion when in an unlocked position so as to avoid unintended return from the unlocked position of the eccentric and consequent downward displacement of the T-tube on the stanchion 4. The device as claimed in any one of claims 1-3, further including a locking device consisting of at least a groove a ball and a spring (12) which together form an arrest between the T-tube and the stanchion which is releasable by means of the key

JRS/JM

Claims

6. The device as claimed in any one of the preceding claims characterised in that the stanchion is attached to the gully ring (17) via a transverse shaft (14) which is attached via screws (15) to the gully ring. Dated this 31 st day of May 1999. AHTI KOSKELAINEN and MORGAN KOSKELAINEN BY: I i H.R. HODGKINSON CO. Patent Attorneys for the Applicant to 9 0 i* l• 9 2136A JRS/JM I 6 ABSTRACT A hinge device with locking function for gully and septic tank covers and intended for locking the cover (16a) to a gully ring (17) or the like, whereby it incorporates a T- tube attached to the cover (16a) and rotatable on a standing stanchion whereby the T-tube is arrested against turning via an eccentric which can be brought out of locking position by means of a key having a shaft length which is substantially longer than the radial measure of the eccentric, in order to give such a big lever momentum, as required for displacing the T-tube on the stanchion with a substantially reduced force. J4 e 0e a e*r )a 9 00 06 00O 0 0o Ce c