Moisture and dust seal arrangement for a portable radio or the like

• US 4,418,830 A
• Filed: 08/27/1981
• Issued: 12/06/1983
• Est. Priority Date: 08/27/1981
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Dzung, John C., Perkey, Harry J., Schmitz, George J.
• Primary Examiner(s): Lowrance, George E.
• Application Number:
  US06/296,718
• Time in Patent Office: 831 Days
• Field of Search: 220/4 R, 220/4 B, 220/81 R, 220/355, 220/358, 220/378, 220/359
• US Class Current: 220/614
• CPC Class Codes: H04B 1/086 Portable receivers
• CPC Class Codes: H04B 1/3833 Hand-held transceivers

Abstract

An improved moisture and dust seal assembly is disclosed which is especially suited for application in small hand-held radio apparatus or the like which includes a molded plastic enclosure. A vertical wall is provided on one of the mating members forming the enclosure, such as the cover. The wall has essentially right angle corners and is adapted to receive a standard O-ring thereabout. The assembly is completed by affixing a ribbon-like member, in the form of a closed loop, to the top of the verticle wall. The ribbon-like member extends a predetermined distance beyond the edge of the verticle wall to form a groove-like space for retaining the O-ring. The ribbon-like member may be affixed to the top of the wall by a convenient heat staking operation.

Claims

1. An improved moisture and dust seal arrangement for an apparatus having a molded plastic enclosure formed by first and second mating members, including in combination:

an inturned lip and an inwardly spaced upstanding vertical wall included on one of the enclosure members in the form of a closed loop configuration and spaced from the outer edge of said one enclosure member, a plurality of right angle corners and a plurality of stake posts positioned about said closed loop vertical wall;

an O-ring positioned about the upstanding vertical wall and retained thereon by the elasticity of the O-ring; and

a flat ribbon-like member in the form of a closed loop overlying said vertical wall and cooperating with said stake posts to comprise an assembly wherein a portion extends outwardly a predetermined distance from the edge of said wall in a manner to form a groove-like space to retain said O-ring; and

said other enclosure member having an outer edge lip portion received in said space between said inturned lip of said one enclosure member and said O-ring positioned about said upstanding vertical wall to compress said O-ring in a lateral direction and form an effective moisture and dust seal.

2. An improved moisture and dust seal arrangement in accordance with claim 1 wherein said plurality of stake posts include reduced neck portions for extending into corresponding apertures in said ribbon-like member.

3. An improved moisture and dust seal arrangement in accordance with the claim 2 wherein said neck portions are melted by heat staking to permanently affix said ribbon-like member to the top of such vertical wall.

4. An improved moisture and dust seal arrangement in accordance with claim 1 wherein said O-ring is fabricated from an impregnated lubricant compound.