TH4286U - A device to prevent overfilling of gas. - Google Patents

Abstract

The overfill protection device consists of a housing with an internal thread at the bottom end for attachment to the first stage of the float. Inside the lower part of the housing is the piston. The upper part of the lower body has several holes around its circumference for gas flow into and out of the gas tank. The middle of the lower body has a pressure relief hole. The central shaft of the piston has a channel where the connection between the middle and lower channels is a shoulder to support the disc. A spring is located at the bottom of the disc, with the top of the spring fitted into the lower part of the piston channel. A push plate is fitted into the uppermost part of the first stage of the float. The lower part of the first stage of the float has two legs that attach to the upper part of the second stage of the float with a locking pin. The second stage of the float is molded with a central claw that moves to push against the lower end of the push plate's rod. Side claws on either side of the central claw move up to push against the two sides of the first stage of the float. The lower part of the second section of the float body is the float stem, and the lower part of the second section of the float body is the float itself, which is attached to the float stem using a screw fastening method.

Claims (6)

1. The gas filling protection device consists of a housing (1) which is shaped like a hollow cylinder, where the top end of the housing (1) is an external thread for fitting onto the internal threaded surface of the lower body of the LPG valve, and the bottom end of the housing (1) is an internal thread for fitting onto the first body of the float (2), where the top of the lower body (4) of the housing (1) has several holes (6) around it to serve as channels for gas to flow in and out of the gas tank, and in the middle of the lower body (4) of the housing (1) is a pressure relief hole (11), and a piston (5) is installed inside the lower body (4) of the housing (1), where the central shaft of the piston (5) is a channel (9) for gas to flow into, and at the connection point between the channel (9) and the first body of the float (2), the central shaft of the first body of the float (2) is hollow. Inside the top part of the first body of the float (2) there is a push plate (17) fitted over it, at the bottom of the push plate (17) is a cylindrical push rod (19) that extends its lower end out of the first body of the float (2). At the bottom of the first body of the float (2) there are two legs (20) which are fitted into the top part of the second body of the float (21) with a locking pin (22). The second body of the float (21) is molded into a central claw (23) which moves to push against the lower end of the push rod (19) of the push plate (17), and on the sides of the central claw (23) are side claws (24) which move up to push against the two sides of the first body of the float (2). At the bottom of the second body of the float (21) is the float rod (25), at the bottom of the The second body of the float (21) is the float (26), which is attached to the float rod (25) by means of a tightening method (27). It has a distinctive feature: the middle and lower parts of the port (9) have shoulders (10) to support the disc (12), on top of the disc (12) is a valve (13) that moves up to close the port (9) of the smallest upper part of the piston (5), and at the bottom of the disc (12) is a spring (14), the upper part of which is fitted inside the lower part of the port (9) of the piston (5), with the upper end of the spring (14) supported by a ring (15). 2. A device to prevent overfilling of gas in accordance with claim 1, in which the upper body (3) of housing (1) shall be smaller than the lower body (4) of housing (1). 3. An overfilling device as per claim 1 or 2, in which the piston (5) shall have a body size that is similar to the lower body (4) of the housing (1) so that it can fit properly into the lower body (4) of the housing (1). 4. A device to prevent the filling of gas in an amount exceeding the specified limit according to any one of claims 1 to 3, in which an O-ring (7) is fitted at the upper end of the piston (5) to prevent gas leakage and an O-ring (8) is fitted at the lower end of the piston (5) to prevent gas leakage as well. 5. A device to prevent overfilling of gas in any of the claims 1 to 4, in which the size of the (9) channel in the upper part of the piston (5) is smallest and gets larger in the middle of the piston (5), and the size of the (9) channel is largest in the lower part of the piston (5). 6. An overfilling device for gas, according to any one of claims 1 to 5, which has an O-ring (16) fitted between the housing (1) and the first body of the float (2) to prevent gas leakage.