Abstract: An apparatus with a hearing device housing including at least one wall with a sound aperture and a counterbore around the sound aperture, and a bushing, having a portion thereof located within the counterbore and secured thereto, configured to receive a hearing device cerumen guard.

Abstract: An apparatus with a hearing device housing including at least one wall with a sound aperture and a counterbore around the sound aperture, and a bushing, having a portion thereof located within the counterbore and secured thereto, configured to receive a hearing device cerumen guard.

Abstract: A filter module for dead-end and cross-flow filtration processes is provided comprising: a frame element comprising two substantially planar faces defining first and second openings at opposite sides thereof; a first and a second filter medium in the form of a sheet material, said filter media each having a first side and a second side; the first and second filter media being attachable in a fluid tight manner to the frame element and fully cover its first and second openings, respectively, a space defined and delimited by the frame element and the two filter media, said second sides of the filter media being arranged to face said space; and said frame element comprising one or more frame sections accommodating one or more ports providing a fluid flow path from said space to the exterior of the filter module.

Abstract: The invention concerns a heat-insulating body comprising: a) a pulverized hard foamed plastics material and optionally an inorganic porous material; and b) a foil enveloping component a). The foil enveloping component a) is evacuated and then hermetically sealed.

Abstract: A heat-insulating body comprisesa) a porous pressed molded part having a bulk density of from 50 to 350 kg/m.sup.3, preferably of from 100 to 250 kg/M.sup.3, which has been obtained by comminution of plastics foam to powder or flakes, and binding of the power or of the flakes using a binder with simultaneous or subsequent pressing with shaping, andb) a film covering the pressed molded part,with the film which covers the pressed molded part having been evacuated and then hermetically sealed.

Abstract: In a housing cover, particularly a valve cover for an internal combustion engine, having a seal surface extending around its circumference at one side thereof with a seal structure molded onto the seal surface, deformable projections are formed on the side opposite the seal surface for engaging the housing cover by a tool when the seal is molded onto the seal surface.

Abstract: The instant invention is directed to novel compounds and the use thereof in producing polyurethane resins. The compounds generally correspond to the following formula: ##STR1## wherein n is an integer of from 1 to 5,R is a C.sub.1 -C.sub.5 alkyl groupY is a C.sub.1 -C.sub.5 alkyl group or a ##STR2## and Z is a ##STR3## where n=0 or 1, X is --O-- or ##STR4## and R' is an aliphatic group having from 1 to 15 carbon atoms and may contain ester, ether, or amide groups or tertiary nitrogen and, when m=0, R' may be a hydrogen atom.

Abstract: Cellular and non-cellular polyurethane plastics and semi-hard polyurethane foams which are prepared by the use of novel Mannich bases of the general formula ##STR1## and which have improved strength and tear resistance are disclosed herein.

Abstract: New chemical compounds containing the radicals --CO--NH--CH.sub.2 --OR; ##STR1## wherein R is an alkyl radical having one to six carbon atoms and R.sub.1 is an alkylene radical having one to six carbon atoms and a process for making polyurethanes with the new compounds as a catalyst are provided.

Abstract: New chemical compounds containing at least one aliphatically bound tertiary nitrogen atom and at least one --CO--NH--CH.sub.2 --OR radical wherein R is an alkyl group of one to six carbon atoms and a process for making polyurethanes with the new compounds as a catalyst are provided.