Dishwasher spray arm with radial guide vanes to curb jet spin
A dishwasher spray arm that adds small guide vanes near the outlet holes to reduce the rotational (swirling) component of the water jets. The vanes sit in the arm’s internal flow channel and extend roughly radially from each opening; the idea is used in domestic dishwashers to change jet direction and improve coverage or spray impact. Electrolux prosecuted the patent for use in household dishwashers and similar appliances.
(57) What the patent covered
The independent claim covers a dishwasher spray arm that has an internal wash-liquid intake and inner flow volume with at least one outlet opening, and one or more guide vanes located near that opening inside the arm’s flow channel; the vanes extend substantially radially from the opening and are arranged to reduce the rotating movement of the water dispensed compared with an outlet without such vanes.
The distinctive part: Putting radial guide vanes inside the spray-arm flow channel immediately adjacent to the outlet holes to deliberately reduce jet rotation.
Novelty 3/5. Reducing spray-arm rotation and using internal flow features were known, but this applies a specific vane geometry, radial vanes next to outlets, as a targeted fluid-control tweak rather than changing arm layout or external obstacles.
Making it
Injection-molded plastic body with molded internal vanes, possibly assembled to a rotating hub with simple fasteners or ultrasonic welds; seals fitted by hand or machine.
Materials: ABS or polypropylene injection-molded plastic (arm body), Stainless steel or plated stamped metal (arm in some designs) - likely less common here, Elastomer or silicone seals (for intake joints), Optional nylon or glass-filled plastics for stiffer vanes
Manufacturability 4/5. A single molded arm with integral internal vanes is straightforward tooling (moderate mold complexity), plus simple assembly to the hub and seals; no complex electronics or precision metalwork required.
Is anyone buying?
Comparable products are on sale; this exact design wasn't found. Genuine vane assemblies for Samsung WaterWall spray arms are sold by multiple US retailers; multiple listing pages exist showing vane assemblies for Samsung dishwashers.
- DD97-00501A Dishwasher Spray Arm Vane Assembly · AppliancePartsPros$144.78
- DD97-00501E Samsung WaterWall/Vane Spray Arm Assembly · PartsDrunknown
- Samsung DD97-00501B Samsung Dishwasher Vane Assembly · iFixitunknown
This demand check was run with a web search in the week of Oct 5, 2026. Listings change often, so treat it as a starting point for your own research.
Who buys it: homeowners or appliance repairers replacing or upgrading dishwasher spray arms
Sourcing
Factories list related products that could likely be adapted. Listings found are dishwasher spray arm components with generic construction; none explicitly advertise radial guide vanes, but they are compatible with replacement spray arms and offer OEM/Private Label customization in some cases.
- Ningbo Baijia Appliance Co., Ltd · Made-in-China.com (Ningbo Baijia Appliance Co., Ltd listing) · MOQ 100-199US$3.60
- Tower Machinery (Tower-industry/Tower Machinery Co., Ltd) · Alibaba.com (Turkey/Alibaba listing) · MOQ 1,000TL 256.29
Supplier prices come from public listings found with a web search and are usually quoted before customization, shipping and duties, so use them to judge whether a product is worth a quote request.
Before you make it
We didn't find any related continuation or divisional patents still in force, although that doesn't rule out design patents, trademarks or unrelated patents covering the same product.
Practical risks are limited to a crowded replacement-parts market and ensuring the molded vanes resist clogging from debris; the claim is narrow (vane location/geometry) so the market may already have many similar arms.
Owners occasionally revive lapsed patents (about 1.5% are), and this page is a research lead rather than legal advice, so get a freedom-to-operate opinion before you manufacture anything.