Title of Invention	FEEDING LUBRICATING DEVICE
Abstract	The invention relates to a feeding lubricating device comprising a lubricant reservoir (1), a lubricant pump (2) which is driven by a driving motor (16) and is provided with at least one pump element (3) for conveying lubricant to at least one lubrication point, especially at least one feeding distributor (5), via a lubricant conduit (4), a driving member such as a drive shaft, and optional means that are fitted with an eccentric attachment for generating at least one pujnp stroke of the at least one pump element (3). A pressure relief unit (8) which can also be actuated via the driving member blocks a backflow pipe (4) located between the lubricant conduit (4) and the lubricant reservoir (1) in a pressure phase while unblocking the same in a subsequent relief phase.

Title of Invention

FEEDING LUBRICATING DEVICE

Abstract

The invention relates to a feeding lubricating device comprising a lubricant reservoir (1), a lubricant pump (2) which is driven by a driving motor (16) and is provided with at least one pump element (3) for conveying lubricant to at least one lubrication point, especially at least one feeding distributor (5), via a lubricant conduit (4), a driving member such as a drive shaft, and optional means that are fitted with an eccentric attachment for generating at least one pujnp stroke of the at least one pump element (3). A pressure relief unit (8) which can also be actuated via the driving member blocks a backflow pipe (4) located between the lubricant conduit (4) and the lubricant reservoir (1) in a pressure phase while unblocking the same in a subsequent relief phase.

Full Text	Feeding Lubricating Device This invention relates to a feeding lubricating device comprising a lubricant reservoir and a lubricant pump, which can be driven by a drive motor, with at least one pump element for conveying lubricant via a lubricant conduit to at least one lubrication point, in particular at least one feeding distributor, and comprising a drive member, such as a drive shaft, and possibly means including an eccentric for generating at least one pump stroke of the at least one pump element. in such feeding lubricating devices, it should be achieved in a rather simple way that after a pressure phase, in which lubricant is supplied to the at least one lubrication point, a relief phase is initiated, in which excess lubricant is recirculated to the lubricant reservoir. It is the object of the invention to satisfy this requirement as reliably as possible. The solution in accordance with the invention for instance substantially consists in that in a feeding lubricating device as mentioned above, a pressure relief means is provided, which can also be actuated via the drive member for the at least one pump element and blocks a return conduit between the lubricant conduit and the lubricant reservoir in a pressure phase and unblocks the same in a subsequent relief phase. Upon supplying the at least one lubrication point with lubricant, the pressure relief thus is achieved In a simple way by largely utilizing the already existing parts of the device. In accordance with a development of the invention, the pressure relief unit can be actuatable by a cam disk or a similar actuating element which Is seated on the drive member such as the drive shaft. in a special aspect of the invention it is provided that the pressure relief unit includes a rocker mechanism actuatable by the actuating element. Preferably, the pressure relief unit rests against a cam surface of the actuating element via a wheel or similar transmission element. Opening and closing the connection between lubricant conduit and lubricant reservoir for recirculating lubricant can for instance be effected in a constructively simple way in that the pressure relief unit includes an axially movable control piston which blocks the return conduit between the lubricant conduit and the lubricant reservoir in the pressure phase and unblocks the same In the subsequent relief phase, for instance due to a groove extending around the circumferential surface of the control piston. In the proposed feeding lubricating device, the pressure relief phase can be initiated in a simple way by reversing the direction of movement of the drive member with the actuating element. A compact construction of the feeding lubricating device is obtained in particular when the at least one pump element and the pressure relief unit are accommodated in a common pump housing. The drive motor, possibly with the associated transmission, can be attached for instance to the bottom of the pump housing. When several pump elements are provided, the invention furthermore proposes, independent of the pressure relief unit, that said pump elements are in flow connection with each other, possibly via lubricant passages provided at or in the bottom of the pump housing. Further objectives, features, advantages and possible applications of the invention can be taken from the following description of embodiments with reference to the drawings. All features described and/or illustrated per se or in any combination form the subject-matter of the invention, independent of their inclusion in individual claims or their back-reference. In the drawings: Figure 1 shows a schematic representation of a feeding lubricating device incorporating the invention, Figure 2 in an inclined view from the top, opened and partly cut away, schematically shows a lubricant pump which can be used when realizing the invention. Figure 3 shows the lubricant pump of Figure 2, as seen from below, and Figure 4 schematically shows an embodiment of a pressure relief unit formed with a rocker mechanism in the lubricant pump as shown in Figures 2 and 3. As shown in Figure 1, the feeding lubricating device of the invention includes a lubricant pump 2 whose pump elements 3 are actuated by an electric drive motor 16, in order to convey lubricant from a lubricant reservoir 1 into a lubricant conduit 4. The lubricant conduit 4 leads to two (in the Illustrated case) feeding distributors 5, from which corresponding supply conduits 21 are branched off to the individual lubrication points. In the lubricant conduit 4, a pressure switch 20 is provided, which shuts off the further supply of lubricant by sending a corresponding signal to the drive motor 16 via a control 17, when a specified maximum pump pressure is reached. Via the control 17, the lubricant level in the lubricant reservoir 1 is also monitored. In Figure 1, it is also indicated that apart from the one or more pump elements 3, the pump housing 15 also includes a pressure relief unit. The pressure relief unit 8 is incorporated in a return conduit 22, which connects the lubricant conduit 4 between pump element 3 and pressure switch 20 with a lubricant reservoir 1. In the pressure phase, during which the lubrication points should be supplied with lubricant, the pressure relief unit 8 closes the return conduit 22. but opens the same in a subsequent relief phase. Figure 2 illustrates an exemplary construction of an inventive lubricant pump 2 with such a pressure relief unit 8. It can be seen that the three (in the illustrated case) pump elements 3 are periodically actuated by the motor 16 via a drive member 6 constituting a drive shaft and by an eccentric 7 (shown in a partly cutaway representation) rotating like a wheel with the drive member 6. in order to convey lubricant to the lubricant conduit 4. Such pump element 3 for instance has a delivery piston, which against the action of a return spring can perform a stroke by acting on the eccentric 7, in order to discharge a certain amount of lubricant from a lubricant chamber in the direction of the lubricant conduit 4, On the drive member 6, an actuating element 9 constituting a cam disk is seated in accordance with the invention, which with its cam surface 12 acts on a rocker mechanism 10 via a transmission element 11 constituting a wheel. The rocker mechanism 10 on the one hand cooperates with a control piston 13, which in the pressure phase blocks the return conduit 22 between the at least one lubrication point, in particular the pressure switch 20, and the lubricant reservoir 1. In a relief phase subsequent to the pressure phase, by reversing the direction of rotation of the cam disk 9, as shown In detail in Figure 4, the control piston 13, which on its circumference has a circumferential groove 14, is pushed into a position in which the return conduit 22 is unblocked between the at least one lubrication point and the lubricant reservoir 1, so that pressurized, non-used lubricant is recirculated to the lubricant reservoir 1. In adaptation to the cam surface 12 of the cam disk 9, as shown in Figure 4, the rocker arrangement is made such that in the pressure phase, i.e. during the rotation of the cam disk 9, there is no power transmission to the rocker mechanism 19 In fonA^ard direction. This will only be the case when in the relief phase the cam disk 9 is rotated in the reverse direction by the drive member 6. Figure 3 shows that the drive motor 16 and the transmission 23 can be attached to the bottom 18 of the pump housing 15 for creating an assembly. Figure 3 furthennore shows that at the bottom 18 of the pump housing 15 there is also provided the pressure switch 20 and the individual pump elements 3 communicate with each other via lubricant passages 19 provided at the bottom 18, List of Reference Numerals: 1 lubricant reservoir 2 lubricant pump 3 pump elements 4 lubricant conduit 5 feeding distributor 6 drive member, such as drive shaft 7 eccentric 8 pressure relief unit 9 actuating element such as cam disk 10 rocker mechanism 11 transmission element, such as wheel 12 cam surface 13 control piston 14 groove 15 pump housing 16 drive motor 17 control 18 bottom 19 lubricant passages 20 pressure switch 21 supply conduits 22 return conduit 23 transmission Claims: 1. A feeding lubricating device comprising a lubricant reservoir (1) and a lubricant pump (2) drivable by a drive motor (16) with at least one pump element (3) for conveying lubricant via a lubricant conduit (4) to at least one lubrication point, in particular at least one feeding distributor (5), and comprising a drive member (6), such as a drive shaft, and possibly means including an eccentric (7) for generating at least one pump stroke of the at least one pump element (3), characterized by a pressure relief unit (8) which can also be actuated via the drive member (6) and blocks a return conduit (22) between the lubricant conduit (4) and the lubricant reservoir (1) in a pressure phase and unblocks the same in a subsequent relief phase. 2. The feeding lubricating device according to claim 1, characterized in that the pressure relief unit (8) can be actuated by an actuating element (9). such as a cam disk, which is seated on the drive member (6). 3. The feeding lubricating device according to claim 1 or 2, characterized in that the pressure relief unit (8) includes a rocker mechanism (10) actuatable by the actuating element (9). 4. The feeding lubricating device according to claim 2 or 3, characterized in that the pressure relief unit (8) rests against a cam surface (12) of the actuating element (9) via a transmission element (11) such as a wheel. 5. The feeding lubricating device according to any of the preceding claims, characterized in that the pressure relief unit (8) includes an axially movable control piston (13), which blocks the return conduit (22) between the lubricant conduit (4) and the lubricant reservoir (1) in the pressure phase and unblocks the same in the subsequent relief phase, e.g. due to a groove (14) extending around the circumferential surface of the control piston (13). 6. * The feeding lubricating device according to any of the preceding claims, characterized in that the relief phase is initiated by reversing the direction of movement of the drive member (6) with the actuating element (9). 7. The feeding lubricating device according to any of the preceding claims, characterized in that at least one pump element (3) and the pressure relief unit (8) are accommodated in a common pump housing (15). 8. The feeding lubricating device according to claim 7, characterized in that the drive motor (16), possibly with the associated transmission (23), is attached to the pump housing (15), preferably to the bottom (18) thereof. 9. The feeding lubricating device according to any of the preceding claims or according to the generic part of claim 1, comprising a plurality of pump elements (3), characterized in that the pump elements (3) are in flow connection with each other, possibly via lubricant passages (19) provided at or in the bottom (18) of the pump housing (15).

Full Text

Feeding Lubricating Device
This invention relates to a feeding lubricating device comprising a lubricant reservoir and a lubricant pump, which can be driven by a drive motor, with at least one pump element for conveying lubricant via a lubricant conduit to at least one lubrication point, in particular at least one feeding distributor, and comprising a drive member, such as a drive shaft, and possibly means including an eccentric for generating at least one pump stroke of the at least one pump element.
in such feeding lubricating devices, it should be achieved in a rather simple way that after a pressure phase, in which lubricant is supplied to the at least one lubrication point, a relief phase is initiated, in which excess lubricant is recirculated to the lubricant reservoir. It is the object of the invention to satisfy this requirement as reliably as possible.
The solution in accordance with the invention for instance substantially consists in that in a feeding lubricating device as mentioned above, a pressure relief means is provided, which can also be actuated via the drive member for the at least one pump element and blocks a return conduit between the lubricant conduit and the lubricant reservoir in a pressure phase and unblocks the same in a subsequent relief phase.
Upon supplying the at least one lubrication point with lubricant, the pressure relief thus is achieved In a simple way by largely utilizing the already existing parts of the device.
In accordance with a development of the invention, the pressure relief unit can be actuatable by a cam disk or a similar actuating element which Is seated on the drive member such as the drive shaft.
in a special aspect of the invention it is provided that the pressure relief unit includes a rocker mechanism actuatable by the actuating element.

Preferably, the pressure relief unit rests against a cam surface of the actuating element via a wheel or similar transmission element.
Opening and closing the connection between lubricant conduit and lubricant reservoir for recirculating lubricant can for instance be effected in a constructively simple way in that the pressure relief unit includes an axially movable control piston which blocks the return conduit between the lubricant conduit and the lubricant reservoir in the pressure phase and unblocks the same In the subsequent relief phase, for instance due to a groove extending around the circumferential surface of the control piston.
In the proposed feeding lubricating device, the pressure relief phase can be initiated in a simple way by reversing the direction of movement of the drive member with the actuating element.
A compact construction of the feeding lubricating device is obtained in particular when the at least one pump element and the pressure relief unit are accommodated in a common pump housing.
The drive motor, possibly with the associated transmission, can be attached for instance to the bottom of the pump housing.
When several pump elements are provided, the invention furthermore proposes, independent of the pressure relief unit, that said pump elements are in flow connection with each other, possibly via lubricant passages provided at or in the bottom of the pump housing.
Further objectives, features, advantages and possible applications of the invention can be taken from the following description of embodiments with reference to the drawings. All features described and/or illustrated per se or in any combination form the subject-matter of the invention, independent of their inclusion in individual claims or their back-reference.
In the drawings:

Figure 1 shows a schematic representation of a feeding lubricating device incorporating the invention,
Figure 2 in an inclined view from the top, opened and partly cut away, schematically shows a lubricant pump which can be used when realizing the invention.
Figure 3 shows the lubricant pump of Figure 2, as seen from below, and
Figure 4 schematically shows an embodiment of a pressure relief unit formed with a rocker mechanism in the lubricant pump as shown in Figures 2 and 3.
As shown in Figure 1, the feeding lubricating device of the invention includes a lubricant pump 2 whose pump elements 3 are actuated by an electric drive motor 16, in order to convey lubricant from a lubricant reservoir 1 into a lubricant conduit
4. The lubricant conduit 4 leads to two (in the Illustrated case) feeding distributors
5, from which corresponding supply conduits 21 are branched off to the individual
lubrication points. In the lubricant conduit 4, a pressure switch 20 is provided,
which shuts off the further supply of lubricant by sending a corresponding signal to
the drive motor 16 via a control 17, when a specified maximum pump pressure is
reached. Via the control 17, the lubricant level in the lubricant reservoir 1 is also
monitored.
In Figure 1, it is also indicated that apart from the one or more pump elements 3, the pump housing 15 also includes a pressure relief unit. The pressure relief unit 8 is incorporated in a return conduit 22, which connects the lubricant conduit 4 between pump element 3 and pressure switch 20 with a lubricant reservoir 1. In the pressure phase, during which the lubrication points should be supplied with lubricant, the pressure relief unit 8 closes the return conduit 22. but opens the same in a subsequent relief phase.
Figure 2 illustrates an exemplary construction of an inventive lubricant pump 2 with such a pressure relief unit 8. It can be seen that the three (in the illustrated case) pump elements 3 are periodically actuated by the motor 16 via a drive member 6 constituting a drive shaft and by an eccentric 7 (shown in a partly cutaway

representation) rotating like a wheel with the drive member 6. in order to convey lubricant to the lubricant conduit 4. Such pump element 3 for instance has a delivery piston, which against the action of a return spring can perform a stroke by acting on the eccentric 7, in order to discharge a certain amount of lubricant from a lubricant chamber in the direction of the lubricant conduit 4,
On the drive member 6, an actuating element 9 constituting a cam disk is seated in accordance with the invention, which with its cam surface 12 acts on a rocker mechanism 10 via a transmission element 11 constituting a wheel. The rocker mechanism 10 on the one hand cooperates with a control piston 13, which in the pressure phase blocks the return conduit 22 between the at least one lubrication point, in particular the pressure switch 20, and the lubricant reservoir 1. In a relief phase subsequent to the pressure phase, by reversing the direction of rotation of the cam disk 9, as shown In detail in Figure 4, the control piston 13, which on its circumference has a circumferential groove 14, is pushed into a position in which the return conduit 22 is unblocked between the at least one lubrication point and the lubricant reservoir 1, so that pressurized, non-used lubricant is recirculated to the lubricant reservoir 1. In adaptation to the cam surface 12 of the cam disk 9, as shown in Figure 4, the rocker arrangement is made such that in the pressure phase, i.e. during the rotation of the cam disk 9, there is no power transmission to the rocker mechanism 19 In fonA^ard direction. This will only be the case when in the relief phase the cam disk 9 is rotated in the reverse direction by the drive member 6.
Figure 3 shows that the drive motor 16 and the transmission 23 can be attached to the bottom 18 of the pump housing 15 for creating an assembly. Figure 3 furthennore shows that at the bottom 18 of the pump housing 15 there is also provided the pressure switch 20 and the individual pump elements 3 communicate with each other via lubricant passages 19 provided at the bottom 18,

List of Reference Numerals:
1 lubricant reservoir
2 lubricant pump
3 pump elements
4 lubricant conduit
5 feeding distributor
6 drive member, such as drive shaft
7 eccentric
8 pressure relief unit
9 actuating element such as cam disk
10 rocker mechanism
11 transmission element, such as wheel
12 cam surface
13 control piston
14 groove
15 pump housing
16 drive motor
17 control
18 bottom
19 lubricant passages
20 pressure switch
21 supply conduits
22 return conduit
23 transmission

Claims:
1. A feeding lubricating device comprising a lubricant reservoir (1) and a lubricant pump (2) drivable by a drive motor (16) with at least one pump element (3) for conveying lubricant via a lubricant conduit (4) to at least one lubrication point, in particular at least one feeding distributor (5), and comprising a drive member (6), such as a drive shaft, and possibly means including an eccentric (7) for generating at least one pump stroke of the at least one pump element (3), characterized by a pressure relief unit (8) which can also be actuated via the drive member (6) and blocks a return conduit (22) between the lubricant conduit (4) and the lubricant reservoir (1) in a pressure phase and unblocks the same in a subsequent relief phase.
2. The feeding lubricating device according to claim 1, characterized in that the pressure relief unit (8) can be actuated by an actuating element (9). such as a cam disk, which is seated on the drive member (6).
3. The feeding lubricating device according to claim 1 or 2, characterized in that the pressure relief unit (8) includes a rocker mechanism (10) actuatable by the actuating element (9).
4. The feeding lubricating device according to claim 2 or 3, characterized in that the pressure relief unit (8) rests against a cam surface (12) of the actuating element (9) via a transmission element (11) such as a wheel.
5. The feeding lubricating device according to any of the preceding claims, characterized in that the pressure relief unit (8) includes an axially movable control piston (13), which blocks the return conduit (22) between the lubricant conduit (4) and the lubricant reservoir (1) in the pressure phase and unblocks the same in the subsequent relief phase, e.g. due to a groove (14) extending around the circumferential surface of the control piston (13).

6. * The feeding lubricating device according to any of the preceding claims,
characterized in that the relief phase is initiated by reversing the direction of
movement of the drive member (6) with the actuating element (9).
7. The feeding lubricating device according to any of the preceding claims,
characterized in that at least one pump element (3) and the pressure relief unit (8)
are accommodated in a common pump housing (15).
8. The feeding lubricating device according to claim 7, characterized in that
the drive motor (16), possibly with the associated transmission (23), is attached to
the pump housing (15), preferably to the bottom (18) thereof.
9. The feeding lubricating device according to any of the preceding claims or
according to the generic part of claim 1, comprising a plurality of pump elements
(3), characterized in that the pump elements (3) are in flow connection with each
other, possibly via lubricant passages (19) provided at or in the bottom (18) of the
pump housing (15).

Documents:

2242-CHENP-2006 CORRESPONDENCE OTHERS 02-09-2011.pdf

5084-CHENP-2007 CORRESPONDENCE OTHERS 02-09-2011.pdf

5084-CHENP-2007 ENGLISH TRANSLATION 02-09-2011.pdf

5084-CHENP-2007 AMENDED CLAIMS 18-06-2012.pdf

5084-CHENP-2007 AMENDED CLAIMS 22-03-2012.pdf

5084-CHENP-2007 CORRESPONDENCE OTHERS 18-06-2012.pdf

5084-CHENP-2007 EXAMINATION REPORT REPLY RECEIVED 22-03-2012.pdf

5084-CHENP-2007 FORM-3 22-03-2012.pdf

5084-CHENP-2007 OTHER PATENT DOCUMENT 22-03-2012.pdf

5084-CHENP-2007 POWER OF ATTORNEY 22-03-2012.pdf

5084-chenp-2007-abstract.pdf

5084-chenp-2007-claims.pdf

5084-chenp-2007-correspondnece-others.pdf

5084-chenp-2007-description(complete).pdf

5084-chenp-2007-drawings.pdf

5084-chenp-2007-form 1.pdf

5084-chenp-2007-form 3.pdf

5084-chenp-2007-form 5.pdf

5084-chenp-2007-pct.pdf

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Patent Number

253187

Indian Patent Application Number

5084/CHENP/2007

PG Journal Number

27/2012

Publication Date

06-Jul-2012

Grant Date

03-Jul-2012

Date of Filing

12-Nov-2007

Name of Patentee

Lincoln GmbH

Applicant Address

HEINRICH-HERTZ-STRASSE 2-8 69190 WALLDORF

Inventors:

#	Inventor's Name	Inventor's Address
1	PALUNCIC, ZDRAVKO	BUCHENSTRASSE 44 D-67067 LUDWIGSHAFEN
2	SCHONFELD, ANDREAS	ESCHENWEG 5 68789 ST LEON-ROT

PCT International Classification Number

F16N7/38

PCT International Application Number

PCT/EP06/02255

PCT International Filing date

2006-03-11

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	202005005916.1	2005-04-12	Germany