Pneumatic valve with unitary valve core including insert

Abstract

A valve for a pressure vessel such as a bicycle tire is provided. The valve includes a body having a bore on one end and a groove communicating with the bore, the body further having a passage for fluid communication with the bore, and the body further having a circumferential groove on its outer diameter. A valve seat is disposed in the groove. A sealing plug is disposed in the passage. A biasing member is provided that engages with the passage and biases the sealing plug to press it against the valve seat. Embodiments provide a valve core having an insert that supports the valve seat during operation.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims the benefit of priority of U.S. Provisional Application No. 63 / 456,365, filed on Mar. 31, 2024, entitled “A Pneumatic Valve Having A Unitary Valve Core With Insert”. The content of U.S. Provisional Application No. 63 / 456,365 is incorporated herein by reference.

[0002] The present disclosure generally relates to pneumatic valve systems, such as, for example, pneumatic valve systems used in tube bicycle tires and tubeless bicycle tires, and methods of making and using pneumatic valve systems. More particularly, the present disclosure relates to improved valve systems as alternatives to Schrader valves, Presta valves, and Dunlop valves, and other pneumatic valves.

Background Art

[0003] Pneumatic valve systems for connecting a pressurized air source (e.g., a pressurized tank or air pump) to pneumatic tires, tubes, or other structures have been in use for quite some time. While conventional devices devised and utilized to date are widely used, they still suffer from design flaws. These devices are difficult to install and difficult to maintain while inflating the tube or tire, and often fail to form a reliable seal on the tire valve stem, tube, or other structure, resulting in leaks. Furthermore, the poor coupling between conventional pneumatic valves and pressure gauges can lead to inaccurate pressure readings, improper tire inflation, reduced fuel efficiency (or decreased bicycle speed), and uneven tire wear, thereby shortening tire life and, in some cases, voiding the manufacturer's warranty. While conventional devices meet their respective specific purposes and requirements (i.e., increasing air pressure in the tube or tire), they also have frustrating functional drawbacks. For example, using valve couplings often requires the user to assume an awkward and uncomfortable posture for a certain period of time while inflating the tube or tire. In such situations, high reliability of the valve connection is highly desirable in order to avoid physical discomfort and wasted time as much as possible.

[0004] Schrader valves have a significant connection problem due to the way the pump head is secured to the valve stem. Because the seal between the pump head and the valve is made on the outside of the valve stem, the internal surface area shared between the distal end of the valve stem and the pump head valve cavity is relatively large. As a result, the internal pressure of the tire or other container to which the valve is mounted exerts a significant force on the internal pump head surface, thereby potentially causing the pump head to detach from the valve if there is no mechanism to hold it in place. To properly secure the pump head to the valve, Schrader pump head designs include a locking lever. The gripping mouthpiece of the Schrader pump head applies a significant force to sufficiently compress the rubber, preventing the pump head from "popping out" of the valve due to the combined effect of high instantaneous output pressure from the pump and rising internal pressure in the tire or other container. Therefore, virtually all Schrader valve pump heads suffer from the same problem, and these pump heads are difficult and cumbersome to lock, requiring both hands and considerable finger strength to engage and lock the pump head.

[0005] Presta valves are notorious for being difficult to use and having several drawbacks. Presta valves share the same problems as Schrader valves, namely, that without a locking mechanism, they receive enough force to blow the pump head off the valve stem. The locking lever and chuck are difficult and cumbersome to handle. Presta valves have further drawbacks and disadvantages, including the need to remove the captive nut which forms part of the valve stem structure, which is even more inconvenient; the need for a special pump that fits the special Presta design; the delicate and easily damaged Presta valve stem design; and the common problem that the threaded core of the Presta valve stem does not detach from the stem housing when engaged with the pump head. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] U.S. Patent Application No. 17 / 160,320 [Patent Document 2] PCT application PCT / US2023 / 017843 [Patent Document 3] PCT application PCT / US2023 / 020947 [Overview of the project] [Problems that the invention aims to solve]

[0007] Therefore, there is still a need for pneumatic valve couplers that improve upon the concept and design of conventional devices. [Means for solving the problem]

[0008] According to aspects of the present disclosure, a pneumatic valve is provided. The valve includes a body having a bore on one end and a groove communicating with the bore, the body further having a passage for fluid communication with the bore, and the body further having a circumferential groove on its outer diameter. A valve seat is disposed in the groove. A sealing plug is disposed in the passage. A biasing member is provided that engages with the passage and biases the sealing plug to press it against the valve seat.

[0009] As an addition or alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include an insert coupled to the bore, the insert having walls with ends substantially parallel to the sides of the groove.

[0010] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include an insert having an opening with an inner diameter, the opening resulting in fluid communication between the end of the body and the passage.

[0011] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include having a wall such that the insert cooperates with the groove to support the valve seat in the groove.

[0012] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include having a flange that engages with a stepped portion at the end of the body.

[0013] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include the insert being bonded to the body by press-fitting, mechanical fasteners, or adhesive.

[0014] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include having a body that is a single unitary component.

[0015] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include a passage that includes a shoulder and a biasing member disposed between the shoulder and the sealing plug.

[0016] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve include having a fastener configured such that the body is coupled to the valve stem.

[0017] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include a seal coupled to the outer diameter of the body, the seal being configured to engage with the inner surface of the valve stem.

[0018] In addition to or as an alternative to one or more of the features described herein, further embodiments of the pneumatic valve may include a body having a portion of its outer diameter, the portion having a knurled surface.

[0019] In addition to one or more of the features described herein, or alternatively thereto, further embodiments of the pneumatic valve may include a coupler configured to couple to a valve stem, the body including a flange on an outer diameter, the flange being disposed between a shoulder of the coupler and an end of the valve stem when installed on the valve stem.

[0020] In addition to one or more of the features described herein, or alternatively thereto, further embodiments of the pneumatic valve may include that the passage may have a first portion, the sealing plug being at least partially disposed in a second portion, the first portion including having a diameter larger than the bore.

[0021] In addition to one or more of the features described herein, or alternatively thereto, further embodiments of the pneumatic valve may include that the body has a first end and an opposite second end, the bore extending from the first end. The valve seat is positioned closer to the first end than the second end.

[0022] In addition to one or more of the features described herein, or alternatively thereto, further embodiments of the pneumatic valve may include that the body has a first end and an opposite second end, the bore extending from the first end. The valve seat is positioned closer to the second end than the first end.

[0023] The above objects, advantages, and features of the present invention will become apparent when the following detailed description is considered in conjunction with the accompanying drawings, along with its construction and method of operation. Throughout several of the drawings described herein, like elements have like reference numerals associated with them. Further benefits and other advantages of the present invention will become readily apparent from the detailed description of the preferred embodiments.

Brief Description of the Drawings

[0024] [Figure 1] [[ID=:24]]A side view of a bicycle wheel according to an embodiment. [Figure 2A]Figure 1 is a side view of a Presta-type pneumatic valve for a pressure vessel such as a bicycle wheel, according to another embodiment. [Figure 2B] Figure 2A is a side cross-sectional view of a pneumatic valve. [Figure 2C] Figure 2B is an enlarged cross-sectional view of a portion of the pneumatic valve. [Figure 3] Figures 2A and 2C show embodiments of the valves connected to the pump head. [Figure 4A] Figures 2A to 2C show an inner tube with a bicycle tire and valve according to an embodiment. [Figure 4B] Figures 2A to 2C show an inner tube with a bicycle tire and valve according to an embodiment. [Figure 5] This is a diagram of a Schrader-type pneumatic valve for a pressure vessel such as a bicycle wheel, according to another embodiment. [Figure 6A] Figure 5 shows a diagram of the pump head used for the valve. [Figure 6B] Figure 5 shows a diagram of the pump head used for the valve. [Figure 7A] Figure 5 shows an inner tube type tire used with the valve. [Figure 7B] Figure 5 shows an inner tube type tire used with the valve. [Figure 8] This is a diagram of a damp-type pneumatic valve for a pressure vessel, pump head, and inner tube tire. [Figure 9A] This is a diagram of a damp-type pneumatic valve for a pressure vessel, pump head, and inner tube tire. [Figure 9B] This is a diagram of a damp-type pneumatic valve for a pressure vessel, pump head, and inner tube tire. [Figure 10A] This is a diagram of a damp-type pneumatic valve for a pressure vessel, pump head, and inner tube tire. [Figure 10B] This is a diagram of a damp-type pneumatic valve for a pressure vessel, pump head, and inner tube tire. [Modes for carrying out the invention]

[0025] This disclosure provides a valve and inflation system for pneumatic tires, as well as related devices to improve ease of use. The valve and inflation system described herein is designed to function as an easy-to-use tire valve and valve coupler system and is presented as an alternative to older tire valve systems. This novel valve system allows the user to mount the valve coupler to the valve stem in a single linear motion without the need to fix the valve coupler to the valve stem using a clasp or latch, and nevertheless allows for backward compatibility with prior art pump heads. This disclosure enables smooth axial mounting of the valve coupler to the valve stem and prevents leakage between the valve coupler and the valve stem. Thus, this disclosure significantly improves upon conventional valve systems, providing the user with a mechanically more reliable, efficient, and ergonomically superior valve system.

[0026] Embodiments of the present invention illustrate, for example, valves used in specific types of pumps such as Presta pump heads, but these are illustrative purposes only, and it should be understood that the valves described herein may be used in any known pneumatic pump head, such as Schrader, Presta, or Dump-type pump heads.

[0027] Pressure vessels are often used to hold compressed gases such as air. As shown in Figure 1, an example of such a pressure vessel is a bicycle wheel 100 having a tire 102, a rim 104, and a valve 106. The wheel 100 may further include additional components such as spokes, bearings, or axles. The wheel 100 may have an inner tube (not shown) disposed within the tire 102, the inner tube being coupled to the valve 106 and configured to be inflated with a pressurized gas such as air to support the tire 102 during operation. The wheel 100 may also be of the tubeless type, in which the tire 102 is sealably coupled to the rim 104 to define a pressurized space that supports the tire during operation. In tubeless type tires, the valve 106 is typically coupled to the rim 104. It should be understood that the embodiments disclosed herein may be used for either an inner tube or a tubeless type tire configuration.

[0028] Valve description Referring next to Figures 2A to 2C, an embodiment of a pneumatic valve 200 used on a pressure vessel without a tube is shown. As described herein, the exemplary embodiments describe a valve for a tubeless tire, but this is for illustrative purposes only and the claims should not be limited in this way. Furthermore, the embodiments described herein may be used in any of the pump heads described in Patent Document 1, filed on January 27, 2021, which is owned by the same applicant and whose contents are incorporated by reference into the present invention.

[0029] The valve 200 includes an elongated, generally cylindrical stem body 202 having a first end 204 and a second end 206. A threaded portion 208 is located in the center between the first end 204 and the second end 206. The threaded portion is configured to receive a rim nut 210. The rim nut 210 works in cooperation with a rim gasket 212 to seally connect the valve 200 to the rim 104 of the tubeless container.

[0030] The rim gasket 212 is disposed on or bonded to the first end. In the illustrated embodiment, the rim gasket is made of rubber or elastomer material, which is deformable to allow the rim gasket 212 to seal the rim of the wheel. In the illustrated embodiment, the rim gasket 212 includes a conical outer surface. In the embodiment, the rim gasket 212 is molded onto the stem body 202. The stem body 202 may optionally include one or more circumferential ribs (not shown) which facilitate the retention of the rim gasket in place at the first end 204.

[0031] The stem body 202 has a central passage 216 extending from a first end 204 to a second end 206. In the illustrated embodiment, the central passage 216 is coaxial with the stem body 202. In the embodiment, the central passage includes a first counterbore or first cavity 218 extending inward from the end portion 220 of the second end 206. The counterbore 216 may include fastening functional parts such as threads 222. The threads 222 engage and cooperate with corresponding threads on the valve core 224 to connect the valve core to the second end 206.

[0032] An intermediate passage 226 extends between the central passage 216 and the counterbore 218. In this embodiment, the central passage 226 has a smaller diameter than both the counterbore 218 and the central passage 216. The inner diameter surface defining the intermediate passage 226 works in cooperation with the seal or gasket 227 of the valve core 224 to seal the central passage 216 from the environment when the valve is closed.

[0033] In this embodiment, the valve core 224 includes a single unitary body having a first portion 228, a fastening portion 230, an optional engaging portion 232, and a valve portion 234. The first portion 228 defines the end of the valve core body and includes an opening that defines a passage 236. The passage 236 is fluidly coupled to a central passage 216, and therefore to the tire or inner tube. A groove 238 having a size to receive a seal 240 is formed on the outer diameter of the first portion 228. The seal 240 is sized to engage with the inner diameter of the central passage 226. In this embodiment, the seal 240 may be made of TPFE.

[0034] The fastening portion 230 includes fastening elements such as threads 242, which engage with threads 222 and are configured to connect the valve core body to the valve stem 202. The fastening portion includes a second passage 244, which extends from and is fluidly coupled to passage 236. In this embodiment, passage 244 has a smaller diameter than passage 236.

[0035] Any engaging portion 232 includes a knurled outer diameter 246. In embodiments, the knurled outer diameter 246 is sized to engage with a coupling mechanism of a conventional pump head, such as a Presta pump head. In some embodiments, the knurled surface improves engagement with the pump head. The engaging portion 232 further includes an inner passage 248 having a larger diameter than the passage 244. The inner passage 248 extends from the passage 244 and is fluidly coupled to the passage 244. This change in diameter defines a shoulder 250 that supports a biasing member, such as a compression spring 252. In embodiments, the spring 252 is made from flat wire material, which improves the airflow through the spring compared to round wire spring material.

[0036] The valve section 234 includes a valve passage 254, which extends from an inner passage 248 to a lip 256, positioned midway between the shoulder 250 and the end 258 of the valve core body. In the embodiment, the valve passage 254 has the same diameter as the inner passage 248. In the illustrated embodiment, the valve passage 254 has a larger diameter than the inner diameters of the inner passage 248 and the lip 256. It has been found that having a valve passage 254 with a larger diameter improves the airflow through the valve compared to embodiments where the diameter remains the same as the inner passage 248.

[0037] A bore 260 extends between the lip 256 and the end 258. A groove 262 is formed in the bore 260, having a size such as to receive a valve seat, for example, an O-ring 264. In an embodiment, one edge of the groove 262 is defined by the lip 256. In an embodiment, the bore 260 includes a stepped portion 266. The bore 260 has a size such as to receive an insert 268. The insert 268 can be coupled to the valve core body, for example, by having a size such as to be press-fitted into the bore 260. In other embodiments, it should be noted that other fastening methods may be used, for example, mechanical fastening (e.g., threads) or adhesive. The insert 268 includes an inner diameter that forms a fluid path between the end 258 and the valve passage 254. The insert 268 further includes a wall having a thickness. The wall supports the O-ring 264 and is sized to cooperate with the groove to hold and maintain the O-ring within the groove due to the pressure from the sealing plug 270 and / or the air pressure from the tire 102. In embodiments, the pressure difference across the O-ring 264 may be about 25 psi to 150 psi (1.72 bar to 10.3 bar). It should be understood that the insert 268 and valve core 224 allow assembly of the valve components from the end 258 while providing advantages in maintaining a desired level of support for the O-ring over the operating pressure range of the pressure vessel (e.g., tire 102). In embodiments, the insert 268 includes a flange 272, which engages with a stepped portion 266 to position the insert 268 in a desired position within the bore 260.

[0038] A sealing plug 270 is disposed within the passage 254 and the bore 260. A pressure spring biases the sealing plug 270 and presses it against the valve seat 264. The sealing plug 270 is movable between a first position or closed position (Figure 2C) in contact with the valve seat 264 and a second position or open position in which at least a portion of the sealing plug 270 is displaced from the valve seat 264. In the open position, the central passage 216 is fluid-coupled to the pump head (e.g., when the pressure vessel is filled) or fluid-coupled to the environment (e.g., when the user is removing air from the pressure vessel).

[0039] In this embodiment, the sealing plug 270 includes a lower portion 272 having a size such that it is received within the inner diameter of the compression spring 252. A central portion 274 extends from the lower portion 272. The central portion 274 has an outer diameter larger than the inner diameter of the valve seat 264. The central portion 274 further includes a conical portion 276, which transitions the outer diameter of the central portion 274 to an upper or pin portion 278. The pin portion 278 has a diameter smaller than the valve seat 264. It should be understood that the conical portion 276 engages with the valve seat 264. It should be further understood that during the air filling operation, the pin portion 278 is engaged by an expansion pin in the pump head, thereby translating the sealing plug 270 and compressing the spring 252. In this embodiment, the pin portion 278 has an end that extends beyond the end portion 258. This has been shown to have the advantage of allowing users to manually release pressure from a pressure vessel (e.g., tire 102) (e.g., with their fingernails).

[0040] While embodiments of this specification illustrate the valve seat 264 being adjacent to the end 258, this is for illustrative purposes only, and the claims are not limited in this way. In other embodiments, the valve seat 264 may be positioned closer to the passage 236 than shown in the drawings, without departing from the teachings given herein. In embodiments, the valve seat 264 is closer to the opposing end of the valve core 224 opposite to the end 258 than to the end 258.

[0041] In this embodiment, a portion 282 of the outer diameter of the valve core 224 includes a plurality of shallow grooves or threads. This portion increases the grip strength of the pump head against the valve 200, preventing the pump head from detaching during operation under the operating pressure of a pressure vessel such as a bicycle tire with an operating pressure range of 25 to 150 psi (1.72 bar to 10.3 bar).

[0042] Finally, the valve core 224 includes a curved slot 280, which extends circumferentially around the outer surface 670 (i.e., a circumferential concave surface). The curved slot 268 cooperates with functional parts such as bearings, projections, or O-rings on the pump head 300 to detachably connect the pump head to the valve 200. An example of such a pump head is described in the aforementioned Patent Document 1 and shown in Figure 3A. Additional examples of pump heads are described in Patent Documents 2 and 3, the contents of which are incorporated herein by reference.

[0043] Referring to Figure 3B, an embodiment is shown in which a conventional Presta pump head 300 is coupled to the valve 200. As discussed above, the knurled surface 246 of the engagement portion 232 facilitates coupling of the pump head 300 to the valve 200.

[0044] Referring to Figures 4A and 4B, the valve 200 can be used with either a tubeless tire 102 (Figure 4A) or a tire having an inner tube 110 (Figure 4B).

[0045] Referring to Figure 5, an embodiment of valve 500 coupled to a Schrader valve stem is shown. It should be understood that valve 500 operates and is constructed similarly to valve 200 described with respect to Figures 2A to 2C, and that the portion of the valve core coupled to the Schrader valve stem is configured to engage with the threads used on the Schrader valve stem.

[0046] Figures 6A and 6B show that the valve 500 in Figure 5 is coupled to the pump head 600 as described in the aforementioned Patent Document 1.

[0047] Figures 7A and 7B show that valve 500 is used in inner tube 710 type tires. Please note that valve 500 can also be used in tubeless tires, as shown in Figure 4A.

[0048] Referring to Figure 8, an embodiment of valve 800 coupled to a damped valve stem is shown. It should be understood that valve 800 operates and is constructed similarly to valve 200 described with respect to Figures 2A-2C, and that the portion of the valve core coupled to the damped valve stem is configured to engage with the threads used on the damped valve stem. In this embodiment, the valve includes a coupler 802 having a threaded inner diameter configured to couple to the damped valve stem. The coupler further includes a shoulder 804 that engages with a flange 806 on the outer diameter of the valve body 808. The flange 806 is sized to have an outer diameter larger than the passage of the damped valve step, thereby engaging with the end of the valve stem when inserted into the valve stem. The flange 806 is positioned between the shoulder 804 and the end of the valve stem when coupled to the valve stem. In this embodiment, the coupler 802 may include a knurled outer diameter.

[0049] Figures 9A and 9B show that the valve 800 in Figure 8 is coupled to the pump head 900 as described in the aforementioned Patent Document 1.

[0050] Figures 10A and 10B show that valve 800 is used in inner tube 1010 type tires. Please note that valve 800 can also be used in tubeless tires, as shown in Figure 4A.

[0051] While embodiments of this specification refer to valve cores or valve components being made from metallic materials, this is for illustrative purposes only and should not be used to limit the scope of the claims. In other embodiments, valve cores and / or valve components may be manufactured using plastic materials and / or composite materials by injection molding or additive manufacturing.

[0052] The above description of specific embodiments of the present invention is provided for illustrative and explanatory purposes only. These descriptions are not exhaustive and do not limit the invention to the exact form disclosed, and numerous modifications and variations are possible in view of the above teachings. The embodiments have been selected and described to best illustrate the principles of the present invention and its practical applications, thereby enabling those skilled in the art to best utilize the invention and its various embodiments, along with various modified embodiments suitable for specific intended uses. [Explanation of symbols]

[0053] 100 Bicycle Wheels 102 Tires 104 rim 106 Valves 200 pneumatic valve 202 Stem Body 204 First end 206 Second end 208 Threaded part 210 Rim Nut 212 Rim Gasket 216 Central aisle 218 Counterbore or first cavity 220 End part 222 threads 224 Valve core 226 Intermediate Passage 227 Seals or gaskets 228 Part 1 230 Fastening part 232 aisle 234 Valve section 236 aisle 238 Groove 240 stickers 242 threads 244 aisle 246 knurled outer diameter 248 Inner passage 250 shoulders 252 Compression spring 254 Valve passage 256 Lip 258 End 260 Bore 262 Groove 264 O-rings 266 Stepped part 268 Inserts 270 Sealed Plug 272 Flange 274 Central part 276 Conical section 278 Pin section 280 curved slots 282 parts 300 Pump Head 500 valves 600 Pump Head 670 Exterior 710 Inner tube 800 valves 802 Coupler 804 Shoulder 806 Flange 808 Valve body 900 Pump Head 1010 Inner tube

Claims

1. It is a pneumatic valve, A body having a bore on one end and a groove communicating with the bore, wherein the body further has a passage for fluid communication with the bore, and the body further has a circumferential groove on its outer diameter, A valve seat disposed within the groove, A sealed plug is installed in the aforementioned passage, A biasing member that engages with the passage and biases the sealing plug to press it against the valve seat, A pneumatic valve equipped with this feature.

2. The pneumatic valve according to claim 1, further comprising an insert coupled to the bore, wherein the insert has walls including ends substantially parallel to the side surface of the groove.

3. The pneumatic valve according to claim 2, wherein the insert includes an opening having an inner diameter, the opening providing fluid communication between the end of the body and the passage.

4. The pneumatic valve according to claim 3, wherein the insert includes a wall having a size such that it cooperates with the groove to support the valve seat in the groove.

5. The pneumatic valve according to claim 4, wherein the insert includes a flange that engages with a stepped portion at the end of the main body.

6. The pneumatic valve according to claim 2, wherein the insert is bonded to the main body by press-fitting, mechanical fasteners, or adhesive.

7. The pneumatic valve according to claim 1, wherein the main body is a single unitary component.

8. The pneumatic valve according to claim 7, wherein the passage includes a shoulder, and the biasing member is disposed between the shoulder and the sealing plug.

9. The pneumatic valve according to claim 1, wherein the main body includes a fastener configured to be coupled to a valve stem.

10. The pneumatic valve according to claim 9, further comprising a seal coupled to the outer diameter of the main body, wherein the seal is configured to engage with the inner surface of the valve stem.

11. The pneumatic valve according to claim 1, wherein the body includes a portion of the outer diameter, and the portion has a knurled surface.

12. The pneumatic valve according to claim 1, further comprising a coupler configured to be coupled to a valve stem, wherein the body includes a flange on its outer diameter, and the flange, when mounted on the valve stem, is disposed between the shoulder of the coupler and the end of the valve stem.

13. The pneumatic valve according to claim 1, wherein the passage includes a first portion, the sealing plug is at least partially disposed in the second portion, and the first portion has a diameter larger than the bore.

14. The body includes a first end and a second end on the opposite side, and the bore extends from the first end. The pneumatic valve according to claim 1, wherein the valve seat is positioned closer to the first end than to the second end.

15. The body includes a first end and a second end on the opposite side, and the bore extends from the first end. The pneumatic valve according to claim 1, wherein the valve seat is positioned closer to the second end than to the first end.

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