A drain petcock having a central channel for drainage, a side wall aperture for draining, and a closing plug that closes the central channel and overlies the side wall aperture. The partial removal of the closing plug enables a controlled flow for initial draining. A full removal of the closing plug enables a more controlled flow through the central channel for further draining.

A drain petcock having a central channel for drainage, a side wall aperture for draining, and a closing plug that both closes the central channel and overlies the side wall aperture. The partial removal of the closing plug enables a controlled flow for initial draining. A full removal of the closing plug enables a more controlled flow through the central channel for further draining.

A safety plug for a pipe formed of two engageable plug halves each having a mateable face to seal together around a cable. An outer surface includes a plurality of steps corresponding with different pipe sizes for engagement within the pipe. The outer surface is threaded or includes a locking mechanism which moves a portion of the two engageable plug halves into physical engagement with threads of the pipe. The locking mechanism can include locking pins at each of the outer steps, and which are extended outward by a manual push button upon the plug being placed in a pipe.

A safety plug for a pipe formed of two engageable plug halves each having a mateable face to seal together around a cable. An outer surface includes a plurality of steps corresponding with different pipe sizes for engagement within the pipe. The outer surface is threaded or includes a locking mechanism which moves a portion of the two engageable plug halves into physical engagement with threads of the pipe. The locking mechanism can include locking pins at each of the outer steps, and which are extended outward by a manual push button upon the plug being placed in a pipe.

A drain petcock having a central channel for drainage, a side wall aperture for draining, and a closing plug that both closes the central channel and overlies the side wall aperture. The partial removal of the closing plug enables a controlled flow for initial draining. A full removal of the closing plug enables a more controlled flow through the central channel for further draining.

The present invention provides a seal housing (102) for releasable attachment to a hydraulic or pneumatic cylinder (101), the seal housing (102) being suitable for retaining a seal assembly and the seal housing (102) comprising a generally annular main body (201). The annular main body (201) defines an annular disc-shaped portion (202) having an upper surface (203), a lower surface (204), an outer peripheral edge (205) and an inner edge (206). Said inner edge (206) bounds a circular opening (207) extending the full height of said annular disc shaped portion (202) between said upper and lower surfaces (203, 204). The annular main body (201) further defines an annular collar portion (208) upstanding from the upper surface (203) of said disc shaped portion (202) adjacent said peripheral edge (205) of said disc shaped portion (202), said annular collar portion (208) extending height-wise from a base end (209) joined to said disc-shaped portion (202) to an upper end (210), and width-wise from an inner edge (211) to an outer peripheral edge (212), said inner edge (211) of said annular collar portion (208) bounding a circular opening (213) extending the full height of said annular collar portion (208). The annular main body (201) also further defines an annular flange portion (216) extending height-wise downwardly from the lower surface (204) of said disc-shaped portion (202) from a base end (217) joined to said lower surface (204) of said disc-shaped portion (202) to a distal end (218), and width wise from an inner edge (219) to an outer edge (220).

A method of manufacturing a hydraulic plug. A shell with a circumferential wall, a sealed end, an open end and an axially extending cavity within is provided in which the cavity is defined by an internal surface with an inner diameter which narrows towards the open end. A head of an expander is inserted into the cavity, the expander further comprising a stem extending from the cavity for applying a tensile force (T) to the head. A sleeve is provided on a stem side of the head extending into the cavity, an end of the sleeve adjacent the head having an inner diameter which is less than a maximum outer diameter of the head. The sleeve is formed by expanding the sleeve by forcing the head into the end of the sleeve through urging the sleeve and/or expander towards the other in an axial direction.

A method of manufacturing a hydraulic plug. A shell with a circumferential wall, a sealed end, an open end and an axially extending cavity within is provided in which the cavity is defined by an internal surface with an inner diameter which narrows towards the open end. A head of an expander is inserted into the cavity, the expander further comprising a stem extending from the cavity for applying a tensile force (T) to the head. A sleeve is provided on a stem side of the head extending into the cavity, an end of the sleeve adjacent the head having an inner diameter which is less than a maximum outer diameter of the head. The sleeve is formed by expanding the sleeve by forcing the head into the end of the sleeve through urging the sleeve and/or expander towards the other in an axial direction.

Seal arrangement (48) comprising a plug member (46) configured to seal a through opening (12) in a wall (10); a pressing section (74); and a cover member (70) configured to be connected to the plug member (46) and configured to force the pressing section (74) to press a sealing element (72), arranged laterally outside the plug member (46), towards the wall (10). A kit of parts and a method for sealing a through opening (12) in a wall (10) and for painting the wall (10) are also provided.

A piston rod assembly of a hydraulic fluid pump includes an extension rod extending axially between a first axial end and a second axial end. The extension rod is defined by a first portion, a second portion, and a third portion. The first portion extends from the first axial end to the third portion and the second portion extends from the second axial end to the third portion. The piston rod assembly further includes a sleeve extending around the third portion. The sleeve is configured to couple the first portion to the second portion.