Modular D.C. tool switch assembly
First Claim
1. A D.C. tool switch assembly, comprising:
- a contact subassembly;
an FET subassembly;
a pair of housing halves joined together to form a housing defining an envelope receiving and maintaining said contact and FET subassemblies;
a heat sink received by said housing and in heat dissipating engagement with said FET subassembly; and
wherein said FET subassembly comprises first and second FETs, both of said FETs being maintained within said housing, said FETs being mounted on a printed circuit board and interconnected by a metallic post, and wherein said heat sink comprises first and second metallic plates, one on each of said housing halves.
1 Assignment
0 Petitions
Accused Products
Abstract
A D.C. tool switch assembly is provided with a pair of field effect transistors (FETs) maintained internally of the housing. The switch assembly is configured of a number of subassemblies maintained within the housing, including a contact subassembly having the motor and battery contacts and a pair of pivoting contacts. The field effect transistors are maintained on a second subassembly which nests within the housing and is substantially orthogonal to the contact subassembly. A post passes through the pair of FETs and is formed to engage a heat sink on each of opposite sides of the switch housing. The heat sinks are separate and distinct from each other and individually formed. Each of the heat sinks makes close contacting engagement with an associated one of the FETs. The post provides for interconnection between the FETs and the pair of heat sinks.
-
Citations
12 Claims
-
1. A D.C. tool switch assembly, comprising:
-
a contact subassembly; an FET subassembly; a pair of housing halves joined together to form a housing defining an envelope receiving and maintaining said contact and FET subassemblies; a heat sink received by said housing and in heat dissipating engagement with said FET subassembly; and wherein said FET subassembly comprises first and second FETs, both of said FETs being maintained within said housing, said FETs being mounted on a printed circuit board and interconnected by a metallic post, and wherein said heat sink comprises first and second metallic plates, one on each of said housing halves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A D.C. tool switch assembly, comprising:
-
first and second halves interconnected to form a housing defining an envelop; a contact subassembly securedly engaging one of said pair of housing halves and maintained within said envelop; first and second FETs maintained within said envelop; first and second heat sink plates respectively received by said first and second housing halves external to said envelop and respectively engaging said first and second FETs a post interconnecting said first and second FETs and said first and second heat sinks, said post having first and second rivet heads at each end thereof, said rivet heads engaging respective ones of said first and second heat sinks; and wherein said heat sinks comprise cast plates, said cast plates being of non-uniform thickness and being rounded on an outer surface in regions nearest the associated FET.
-
Specification