Description:Complete Specification:
The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.

Field of the invention:
[0001] The present invention relates to a retaining screw secured to a rail pressure sensor, and more specifically to the rail pressure sensor that is oriented in a particular position and secured in that position by means of the retaining screw.

Background of the invention:
[0002] CN 201262580 Y describes an automobile-used common rail pressure sensor. A pressure-sensitive element and transmission leads connected with the pressure-sensitive element are installed in a stainless steel shell. Protective glue and an integrated circuit module are also arranged in the shell. The protective glue is arranged between the pressure-sensitive element and the integrated circuit module, and the pressure-sensitive element, the integrated circuit module and connecting leads are solidified therein. Furthermore, an anti-interference unit and an electromagnetic compatibility unit are arranged. One end of the shell is connected with an aeronautic linker. A screw structure is used for being connected with other parts is arranged on the surface of the other end of the shell. A shielding layer is arranged on the surfaces of the aeronautic linker and transmission cables. The pressure sensor has simple and reasonable designing structure, can effectively improve the reliability of the product, solves the problems of electromagnetic compatibility and anti-interference, causes the electromagnetic shielding level to achieve the degree of 200V/m, and causes the automobile-used common rail pressure sensor to have high protective property without affecting the original characteristics of the sensor.

Brief description of the accompanying drawings:
[0003] An embodiment of the disclosure is described with reference to the following accompanying drawings:
[0004] FIG. 1 illustrates a rail pressure sensor that is oriented in a particular position and secured in that position by means of a retaining screw in one embodiment of the invention.

Detailed description of the embodiments:
[0005] FIG. 1 illustrates a rail pressure sensor 100. The rail pressure sensor 100 comprises a connector 110 comprising at least one connector pin 120 that is in electronic communication with an engine control unit 121 and receives an electronic signal from the engine control unit 121. A retaining screw 130 is secured to the rail pressure sensor 100, the retaining screw 130 adapted to be secured to the rail body 140 to facilitate securing the rail pressure sensor 100 to the rail body 140.

[0006] FIG. 1 illustrates a rail pressure sensor 100. The rail pressure sensor 100 comprises a connector 110 that is defined at an end of the rail pressure sensor 100. More specifically, the connector 110 that is defined at the end of the rail pressure sensor 100 comprises at least one connector pin 120 that is defined within the connector 110. The at least one connector pin 120 that is defined within the connector 110 is in electronic communication with an engine control unit 121 and receives an electronic signal from the engine control unit 121. In an exemplary embodiment, a retaining screw 130 is secured to the rail pressure sensor 100. More specifically, an inner diameter of the retaining screw 130 is slightly larger than an outer diameter of the rail pressure sensor 100. The retaining screw 130 is inserted within the rail pressure sensor 100 and secured within the rail pressure sensor 100. More specifically, the retaining screw 130 is rotated within a rail body 140 to secure the retaining screw 130 to the rail body 140. Therefore, by rotating the external screw threads 160 of the retaining screw 130 to internal screw threads 195 that are defined in the rail body 140, the retaining screw 130 and hence the rail pressure sensor 100 is secured to the rail body 140.

[0007] In an exemplary embodiment, the retaining screw 130 further comprises a hexagon shaped head 150 that is defined in the retaining screw 130. The hexagon shaped head 150 that is defined in the retaining screw 130 is adapted to be rotated to facilitate securing the retaining screw 130 and correspondingly the rail pressure sensor 100 to the rail body 140. A shank portion 160 is formed at an end of the hexagon shaped head 150 that is defined in the retaining screw 130 and extends therefrom. The shank portion 160 of the retaining screw 130 comprises a plurality of screw threads 170 that are defined on an outer diameter of the shank portion 160 of the retaining screw 130 that is screwed on the rail body 140. In an exemplary embodiment, a retaining ring 180 is secured within a groove 185 that is defined in the rail pressure sensor 100 such that the retaining ring 180 is positioned against an end of the retaining screw 130. More specifically, the retaining ring 180 that is secured within the groove 185 that is defined in the rail pressure sensor 100 is secured against an end of the retaining screw 130, and prevents the retaining screw 130 from being withdrawn from the rail pressure sensor 100. Therefore, due to the abutment of the retaining screw 130 against the retaining ring 180 and that the retaining screw 130 having an inner diameter that is slightly larger than an outer diameter of the rail pressure sensor 100, the retaining screw 130 is free to rotate about the rail pressure sensor 100 about its longitudinal axis.

[0008] In an exemplary embodiment, the retaining ring 180 is secured within the groove 185 that is defined in the rail pressure sensor 100 and positioned against the end of the retaining screw 130. The retaining ring 180 that is positioned within the groove 185 that is defined in the rail pressure sensor 100 and positioned against the end of the retaining screw 130 performs two valuable functions. The first function that is performed by the retaining ring 180 is to prevent the retaining screw 130 from being displaced within the rail pressure sensor 100 by acting as a barrier to the retaining screw 130 and preventing the retaining screw 130 from being withdrawn from the rail pressure sensor 100, thereby securing the retaining screw 130 between the retaining ring 180 and the rail pressure sensor 100. The second function that is performed by the retaining ring 180 is to transmit an axial force that is exerted by the rail pressure sensor 100 to the rail body 140 when the retaining screw 130 is secured to the rail body 140.

[0009] The rail pressure sensor 100 is positioned at a user desired angle with respect to the rail body 140 and secured at the user desired angle. Once the rail pressure sensor 100 is positioned at the user desired angle and secured thereto, the retaining screw 130 is rotated to facilitate securing the plurality of screw threads 170 that are defined on the shank portion 160 of the retaining screw 130 to mating screw threads that are defined in the rail body 140, thereby securing the rail pressure sensor 100 to the rail body 140. In addition, the retaining ring 180 is manufactured from a steel based material or spring ring material and is positioned against the end of the retaining screw 130. Thereby, the retaining screw 130 is positioned between the steel based material or spring ring of the retaining ring 180 and the rail pressure sensor 100 and secured between the steel based material or spring ring of the retaining ring 180 and the rail pressure sensor 100. In addition, the retaining screw 130 is manufactured from a metallic material to facilitate securing the rail pressure sensor 100 to the rail body 140.

[0010] A working of the rail pressure sensor 100 is described as an example. The rail pressure sensor 100 comprises an end portion to which is positioned the retaining screw 130. In the exemplary embodiment, the inner diameter of the retaining screw 130 is positioned around the outer diameter of the rail pressure sensor 100. Since the inner diameter of the retaining screw 130 is slightly larger than the outer diameter of the rail pressure sensor 100, the retaining screw 130 is free to rotate around the outer diameter of the rail pressure sensor 100. Therein, the retaining ring 180 is secured within the groove 185 that is defined in the rail pressure sensor 100 such that the retaining ring 180 is secured against the retaining screw 130 to prevent the retaining screw 130 from being withdrawn from the rail pressure sensor 100. The rail pressure sensor 100 is now positioned at a user desired angle with respect to the vertical axis and held in that position. The retaining screw 130 containing the plurality of screw threads 170 that are defined on the shank portion 160 of the retaining screw 130 are inserted through a bore that is defined in the rail body 140 and rotated within a plurality of internal screw threads 195 that are defined in the rail body 140. Once the shank portion 160 of the retaining screw 130 is fully inserted within the rail body 140, the external screw threads 170 that are defined in the retaining screw 130 mesh against the internal screw threads 195 that are defined in the rail body 140 to facilitate securing the retaining screw 130 to the rail body 140. The retaining screw 130 that is secured to the rail body 140 facilitates securing the rail pressure sensor 100 to the rail body 140. Therefore, once the retaining screw 130 is tightened against the mating screw threads that are defined on the inner diameter of the rail body 140, the rail pressure sensor 100 that is positioned at the user desired angle with respect to the vertical axis and held in that position is retained at the same user desired angle with the rail pressure sensor 100 firmly secured to the rail body 140. Therefore, by having a retaining screw 130 with external screw threads 170 that mate against internal screw threads 195 that are defined in the rail body 140, the rail pressure sensor 100 can be secured to the rail body 140 at any user desired angle.

[0011] It should be understood that the embodiments explained in the description above are only illustrative and do not limit the scope of this invention. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.
, Claims:We claim:

1. A rail pressure sensor (100), said rail pressure sensor (100) comprising:
a connector (110) comprising at least one connector pin (120) that is in electronic communication with an engine control unit (121) and receives an electronic signal from said engine control unit (121); characterized in that
a retaining screw (130) secured to said rail pressure sensor (100), said retaining screw (130) adapted to be secured to a rail body (140) to facilitate securing said rail pressure sensor (100) to said rail body (140).

2. The rail pressure sensor (100) in accordance with Claim 1, wherein said retaining screw (130) further comprises:
a hexagonal head (150) defined in said retaining screw (130), said hexagonal head (150) of said retaining screw (130) adapted to be rotated to facilitate securing said retaining screw (130) to said rail body (140); and
a shank portion (160) formed at an end of said hexagonal head (150) defined in said retaining screw (130) and extending therethrough, the shank portion (160) comprising a plurality of screw threads (170) that are defined on the shank portion (160) of said retaining screw (130) that are screwed onto said rail body (140).

3. The rail pressure sensor (100) in accordance with Claim 2, further comprising a retaining ring (180) secured within a groove (185) that is defined in said rail pressure sensor (100) and positioned against an end of said retaining screw (130).

4. The rail pressure sensor (100) in accordance with Claim 3, wherein said retaining ring (180) secured within the groove (185) that is defined in said rail pressure sensor (100) and positioned against the end of said retaining screw (130) at least one of:
prevents said retaining screw (130) from being displaced within said rail pressure sensor (100); and
transmits an axial force exerted by said rail pressure sensor (100) to said rail body (140).

5. The rail pressure sensor (100) in accordance with Claim 3, wherein said rail pressure sensor (100) is positioned at a user desired angle with respect to said rail body (140) and secured at the user desired angle, and wherein said retaining screw (130) is rotated to facilitate securing the plurality of screw threads (170) that are defined on the shank portion (160) of said retaining screw (130) to mating screw threads (195) that are defined in said rail body (140) to facilitate securing said rail pressure sensor (100) to said rail body (140).

6. The rail pressure sensor (100) in accordance with Claim 3, wherein said retaining ring (180) is manufactured from a steel based material or spring ring and positioned against the end of said retaining screw (130).

7. The rail pressure sensor (100) in accordance with Claim 1, wherein said retaining screw (130) is manufactured from a metallic material to facilitate securing said rail pressure sensor (100) to said rail body (140).