IP Library › Granted Patent US 12,573,794
Granted Patent B2
US 12,573,794 · App. 18/122,586 · Granted Mar 10, 2026

Electrical wiring devices with screwless wire terminals

Inventors: Thomas L. Scanzillo (Monroe, CT); Denny Lo (Bethlehem, CT); Ryan Gene Papageorge (Shelton, CT); Edward Bazayev (Kew Gardens, NY)
Assignee: Hubbell Incorporated
H01R13/6395H01R24/76H01R25/006
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Quick Facts
Patent No.
US 12,573,794
App. No.
18/122,586
Granted
Mar 10, 2026
Kind
B2
Abstract

Electrical wiring devices that incorporate screwless wire terminal connections are described. The electrical wiring devices include for example, single and duplex blade-type electrical receptacles, blade-type locking electrical receptacles, single or multi-pole electrical switches, combination switches and blade-type receptacles, blade-type plugs for electrical cords and blade-type connectors for electrical cords. The electrical wiring devices include a plurality of contact assemblies. Each contact assembly includes a wire terminal and an activating member.

Claims (65)

1 . An electrical wiring device comprising:

a housing having at least one cavity within an interior of the housing, at least one wire receiving opening and at least one activating member opening; and

at least one contact assembly positioned at least partially in the at least one cavity such that the at least one contact assembly is accessible from the at least one wire receiving opening and the at least one activating member opening;

wherein the at least one contact assembly includes:

a wire terminal having a clamp brace, a force applying member secured to the clamp brace and at least one contact enhancing member extending from the clamp brace or the force applying member, the force applying member having a wire pressing member and is movable between a first position where a wire can be secured between the clamp brace and the wire pressing member such that the wire pressing member and the at least one contact enhancing member contact the wire, and a second position where the wire can be inserted through the at least one wire receiving opening and between the clamp brace and wire pressing member; and

an activating member at least partially positioned in the at least one cavity such that the activating member is at least partially operatively associated with the force applying member and extending at least partially through the at least one activating member opening, the activating member being interactive with the force applying member such that movement of the activating member in a first direction causes the activating member to apply a force or mechanical load to the force applying member causing the force applying member to move from the first position to the second position, and movement of the activating member in a second direction removes the force or mechanical load from the force applying member so that the force applying member can move from the second position to the first position.

2 . The electrical wiring device according to claim 1 , wherein the at least one contact enhancing member comprises at least one projection extending from the clamp brace.

3 . The electrical wiring device according to claim 2 , wherein the at least one projection comprises at least one of a tooth, tang, barb and rib.

4 . The electrical wiring device according to claim 1 , wherein the at least one contact enhancing member comprises at least one projection extending from the force applying member.

5 . The electrical wiring device according to claim 4 , wherein the at least one projection comprises at least one of a tooth, tang, barb and rib.

6 . The electrical wiring device according to claim 1 , wherein the at least one contact enhancing member includes at least one wire contacting surface.

7 . The electrical wiring device according to claim 6 , wherein the at least one wire contacting surface comprises at least one of a substantially flat surface, a pointed edge and a rounded surface.

8 . The electrical wiring device according to claim 1 , wherein the force applying member is a clamping member.

9 . The electrical wiring device according to claim 8 , wherein the clamping member is a clamp spring.

10 . The electrical wiring device according to claim 1 , wherein when in the first position the wire is secured between the wire pressing member and the clamp brace by clamping the wire between the wire pressing member and the clamp brace.

11 . The electrical wiring device according to claim 1 , wherein the activating member remains in the first position or the second position until manually moved.

12 . The electrical wiring device according to claim 1 , wherein the movement of the activating member in the second direction is opposite the movement of the activating member in the first direction.

13 . The electrical wiring device according to claim 1 , wherein the movement of the activating member in the first direction and the second direction is parallel to the clamp brace.

14 . The electrical wiring device according to claim 1 , wherein the movement of the activating member in the first direction and the second direction is linear.

15 . The electrical wiring device according to claim 1 , wherein movement of the activating member in the first and second directions is relative to the force applying member or the clamp brace.

16 . The electrical wiring device according to claim 1 , wherein movement of the activating member in the first direction is outward relative to the housing and wherein movement of the activating member in the second direction is inward relative to the housing.

17 . The electrical wiring device according to claim 1 , wherein when in the first position the force applying member can clamp the wire with a force that is substantially perpendicular to a longitudinal axis of the wire.

18 . An electrical wiring device comprising:

a housing having a plurality of cavities within an interior of the housing, a plurality of wire receiving openings and a plurality of activating member openings; and

a plurality of contact assemblies, wherein one of the plurality of contact assemblies is positioned at least partially in one of the plurality of cavities such that the one of the plurality of contact assemblies is accessible from a respective one of the plurality of wire receiving openings and a respective one of the plurality of activating member openings;

wherein each of the plurality of the contact assemblies includes:

a wire terminal having a clamp brace, a force applying member secured to the clamp brace and at least one contact enhancing member extending from the clamp brace or the force applying member, the force applying member having a wire pressing member and is movable between a first position where a wire can be secured between the clamp brace and the wire pressing member such that the wire pressing member and the at least one contact enhancing member contact the wire, and a second position where the wire can be inserted through the one of the plurality of wire receiving openings and between the clamp brace and the wire pressing member; and

an activating member at least partially positioned in the one of the plurality of cavities such that the activating member is at least partially operatively associated with the force applying member and extending at least partially through the one of the plurality of activating member openings, the activating member being interactive with the force applying member such that movement of the activating member in a first direction causes the activating member to apply a force or mechanical load to the force applying member causing the force applying member to move from the first position to the second position, and movement of the activating member in a second direction removes the force or mechanical load from the force applying member so that the force applying member can move from the second position to the first position.

19 . The electrical wiring device according to claim 18 , wherein the at least one contact enhancing member comprises at least one projection extending from the clamp brace.

20 . The electrical wiring device according to claim 19 , wherein the at least one projection comprises at least one of a tooth, tang, barb and rib.

21 . The electrical wiring device according to claim 18 , wherein the at least one contact enhancing member comprises at least one projection extending from the force applying member.

22 . The electrical wiring device according to claim 21 , wherein the at least one projection comprises at least one of a tooth, tang, barb and rib.

23 . The electrical wiring device according to claim 18 , wherein the at least one contact enhancing member includes at least one wire contacting surface.

24 . The electrical wiring device according to claim 23 , wherein the at least one wire contacting surface comprises at least one of a substantially flat surface, a pointed edge and a rounded surface.

25 . The electrical wiring device according to claim 18 , wherein the force applying member is a clamping member.

26 . The electrical wiring device according to claim 25 , wherein the clamping member is a clamp spring.

27 . The electrical wiring device according to claim 18 , wherein when in the first position the wire is secured between the wire pressing member and the clamp brace by clamping the wire between the wire pressing member and the clamp brace.

28 . The electrical wiring device according to claim 18 , wherein the activating member remains in the first position or the second position until manually moved.

29 . The electrical wiring device according to claim 18 , wherein the movement of the activating member in the second direction is opposite the movement of the activating member in the first direction.

30 . The electrical wiring device according to claim 18 , wherein the movement of the activating member in the first direction and the second direction is parallel to the clamp brace.

31 . The electrical wiring device according to claim 18 , wherein the movement of the activating member in the first direction and the second direction is linear.

32 . The electrical wiring device according to claim 18 , wherein movement of the activating member in the first and second directions is relative to the force applying member or the clamp brace.

33 . The electrical wiring device according to claim 18 , wherein movement of the activating member in the first direction is outward relative to the housing and wherein movement of the activating member in the second direction is inward relative to the housing.

34 . The electrical wiring device according to claim 18 , wherein when in the first position the force applying member can clamp the wire with a force that is substantially perpendicular to a longitudinal axis of the wire.

35 . An electrical wiring device comprising:

a housing having at least one cavity within an interior of the housing, at least one wire receiving opening and at least one activating member opening; and

at least one contact assembly positioned at least partially in the at least one cavity such that the at least one contact assembly is accessible from the at least one wire receiving opening and the at least one activating member opening;

wherein the at least one contact assembly includes:

a wire terminal having a clamp brace, a force applying member secured to the clamp brace and at least one contact enhancing member extending from the clamp brace or the force applying member, the at least one contact enhancing member includes a wire contacting surface configured to cut through insulation surrounding a wire, the force applying member being movable between a first position where a wire can be secured between the clamp brace and the force applying member such that the wire contacting surface of the at least one contact enhancing member cuts through insulation surrounding the wire and contacts the wire, and a second position where the wire can be inserted through the at least one wire receiving opening and between the clamp brace and force applying member; and

an activating member at least partially positioned in the at least one cavity such that the activating member is at least partially operatively associated with the force applying member and extending at least partially through the at least one activating member opening, the activating member being interactive with the force applying member such that movement of the activating member in a first direction causes the activating member to apply a force or mechanical load to the force applying member causing the force applying member to move from the first position to the second position, and movement of the activating member in a second direction removes the force or mechanical load from the force applying member so that the force applying member can move from the second position to the first position.

36 . The electrical wiring device according to claim 35 , wherein the at least one contact enhancing member comprises at least one projection extending from the clamp brace.

37 . The electrical wiring device according to claim 36 , wherein the at least one projection comprises one of a tooth, tang, barb and rib.

38 . The electrical wiring device according to claim 35 , wherein the at least one contact enhancing member comprises at least one projection extending from the force applying member.

39 . The electrical wiring device according to claim 38 , wherein the at least one projection comprises one of a tooth, tang, barb and rib.

40 . The electrical wiring device according to claim 35 , wherein the at least one wire contacting surface comprises a tapered surface.

41 . The electrical wiring device according to claim 35 , wherein the force applying member is a clamping member.

42 . The electrical wiring device according to claim 41 , wherein the clamping member is a clamp spring.

43 . The electrical wiring device according to claim 35 , wherein when in the first position the wire is secured between the force applying member and the clamp brace by clamping the wire between the force applying member and the clamp brace.

44 . The electrical wiring device according to claim 35 , wherein the activating member remains in the first position or the second position until manually moved.

45 . The electrical wiring device according to claim 35 , wherein the movement of the activating member in the second direction is opposite the movement of the activating member in the first direction.

46 . The electrical wiring device according to claim 35 , wherein the movement of the activating member in the first direction and the second direction is parallel to the clamp brace.

47 . The electrical wiring device according to claim 35 , wherein the movement of the activating member in the first direction and the second direction is linear.

48 . The electrical wiring device according to claim 35 , wherein movement of the activating member in the first and second directions is relative to the force applying member or the clamp brace.

49 . The electrical wiring device according to claim 35 , wherein movement of the activating member in the first direction is outward relative to the housing and wherein movement of the activating member in the second direction is inward relative to the housing.

50 . The electrical wiring device according to claim 35 , wherein when in the first position the force applying member can clamp the wire with a force that is substantially perpendicular to a longitudinal axis of the wire.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 13, 2025
From: SCANZILLO, THOMAS L.; LO, DENNY; PAPAGEORGE, RYAN GENE; BAZAYEV, EDWARD
To: HUBBELL INCORPORATED
Reel/Frame 072890/0166 →
Continuity (3)
Provisional Application 63412677 · Oct 3, 2022
Provisional Application 63320614 · Mar 16, 2022
Related Publication 20230327377A1 · Oct 12, 2023
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