Abstract: A diaphragm for a pump has a one-piece elastomeric body centered on an axis and formed with an annular outer clamping edge, an annular flexible web extending radially inward from the outer edge, and a core joined by the web to the outer edge and formed in turn by an upper wall and a lower wall axially spaced therefrom. This lower wall is formed on the axis with a throughgoing hole. An insert between the walls extends through the hole, and interengaging formations on the insert and on the lower wall radially couple the insert to the lower wall at an inner edge of the hole.

Abstract: A diaphragm for a pump has a one-piece elastomeric body centered on an axis and formed with an annular outer clamping edge, an annular flexible web extending radially inward from the outer edge, and a core joined by the web to the outer edge and formed in turn by an upper wall and a lower wall axially spaced therefrom. This lower wall is formed on the axis with a throughgoing hole. An insert between the walls extends through the hole, and interengaging formations on the insert and on the lower wall radially couple the insert to the lower wall at an inner edge of the hole.

Abstract: A laminate membrane having an elastomer body and a contact layer applied to the elastomer body. The contact layer is made of polytetrafluoroethylene (PTFE). A barrier layer configured as a permeation barrier is additionally provided, which is disposed between the contact layer and the elastomer body, or applied to the side of the contact layer that faces away from the elastomer body.

Abstract: A laminate membrane having an elastomer body and a contact layer applied to the elastomer body. The contact layer is made of polytetrafluoroethylene (PTFE). A barrier layer configured as a permeation barrier is additionally provided, which is disposed between the contact layer and the elastomer body, or applied to the side of the contact layer that faces away from the elastomer body.

Abstract: A composite diaphragm for diaphragm pumps comprises an elastomer body and a polytetrafluoroethylene (PTFE) coating on its back side. The elastomer body has a shape of a circular dish that has an edge region with a clamping area, a bottom and a flexible section of the diaphragm that connects the edge of the dish with the bottom. The flexible section of the diaphragm comprises a multitude of naps forming elevations on the elastomer backside of the elastomer body. The PTFE coating is a plane ring surface with the area of the flexible section of the diaphragm.

Abstract: A composite diaphragm for diaphragm pumps comprises an elastomer body and a polytetrafluoroethylene (PFTE) coating on its back side. The elastomer body has a shape of a circular dish that has an edge region with a clamping area, a bottom and a flexible section of the diaphragm that connects the edge of the dish with the bottom. The flexible section of the diaphragm comprises a multitude of naps forming elevations on the coated side of the elastomer body. The PFTE coating is a plane ring surface with the area of the flexible section of the diaphragm.

Abstract: A composite diaphragm for diaphragm pumps comprises an elastomer body and a polytetrafluoroethylene (PFTE) coating on its back side. The elastomer body has a shape of a circular dish that has an edge region with a clamping area, a bottom and a flexible section of the diaphragm that connects the edge of the dish with the bottom. The flexible section of the diaphragm comprises a multitude of naps forming elevations on the coated side of the elastomer body. The PFTE coating is a plane ring surface with the area of the flexible section of the diaphragm.

Abstract: A composite diaphragm for diaphragm pumps comprises an elastomer body and a polytetrafluoroethylene (PFTE) coating on its back side. The elastomer body has a shape of a circular dish that has an edge region with a clamping area, a bottom and a flexible section of the diaphragm that connects the edge of the dish with the bottom. The flexible section of the diaphragm comprises a multitude of naps forming elevations on the elastomer backside of the elastomer body. The PFTE coating is a plane ring surface with the area of the flexible section of the diaphragm.

Abstract: The pipe joint connection, in which one of the pipes to be connected is inserted into the other pipe, has a click-stop arrangement for maintaining the connection, which click-stop arrangement comprises two stop webs extending conically with respect to each other and being mounted on the outside of one pipe and two resilient tongues mounted on the outside of the other pipe. When the two pipes are being connected, the resilient tongues pass between the stop webs, whereby they are moved towards each other and, when being in the stop location, engage with the backsides of the stop webs.

Abstract: The motor 3 of the vacuum cleaner is surrounded by the elastomeric shroud 4, which is air-tightly joined to the blower 2. The blower 2 moves the drawn in air into the space defined by the shroud, which the air can only leave through the air outlet ports 13 formed in the wall of the shroud. Behind the air outlet ports 13 there is a filter 10, which cleans the air coming from the shroud. The air passes into the space between the shroud and the vacuum cleaner housing, where it is distributed and comes to rest. It passes through numerous air outlet ports 15 in the vacuum cleaner housing at a low speed.

Abstract: The hand vacuum cleaner comprises a fan arranged in a vacuum cleaner housing, and a dust collector. The handle of the vacuum cleaner is connectable with the housing. At the suction stub of the vacuum cleaner there may be attached an intermediate pipe which is to be connected with a suction tool. An intermediate pipe is provided which is detachably positioned between the vacuum cleaner housing and the handle. Locks are provided to attach this intermediate pipe to the vacuum cleaning housing and the handle, such having a clamp handle for releasing and tightening of the clamps.

Abstract: A vacuum cleaner housing possesses two guide means on the inner side of the end housing wall with a suction port therein in order to receive the board flange of a dust bag adjacent to the lateral housing wall. The guide means comprise guide rails each with a ramp-like wall, extending towards said housing wall, and guide ribs which are located in the lower part of the housing wall and have a slope opposite to that of the ramp-like walls. They are so shaped as to allow the board flange to be inserted between them and the walls. On introduction of such a board flange of a dust bag its lower end section is bent along a prepared line of bending, which has been formed in the lower part of the board flange parallel to its lower side. Accordingly the board flange is so firmly held in place that it is not bent by the suction force to which it is exposed.

Abstract: A housing for a hand vacuum cleaner having a front dust chamber and a rear motor chamber separated from each other by a baffle, a dust chamber cover linked at the baffle, and a tightly connected motor chamber cover. In the area adjacent to the motor chamber cover there is designed a handle hollow in the dust chamber cover. This handle hollow is partially covered by a handhold which may be arranged at the motor chamber cover as an integral part thereof. In another embodiment of the housing, the handhold is incorporated in the dust chamber cover. At the motor chamber cover there may be arranged a cross-piece projecting toward the dust chamber cover, covering the rear area of the handle hollow and supporting a cross-piece of the dust chamber cover, thus providing a particularly robust handhold.

Abstract: Housing for a hand vacuum cleaner, the stowage chamber in the bottom portion of the housing being made by a cavity in the housing wall for formfit holding of the accessory part and in its longitudinal dimensions being arranged perpendicular to the longitudinal axis of the housing, and the stowage chamber being integrated in the baffle and at least partially projecting into the dust chamber, the endless seal extending over the upper wall of the stowage chamber.