Apparatus for servicing automatic transmissions and the like
OwnerZachary T. Parkerinventor
Life of this patent
Estimating the term…
Abstract
A flusher and refill system for automobile, subassemblies such as an automatic transmission includes a storage tank for waste transmission fluid and a storage tank for unused or replacement transmission fluid. A fluid-conducting hose leading from the subassembly is connected to a fluid flow path leading to the waste fluid storage tank and which includes an electric valve and flow rate monitoring gauge. A second fluid-conducting hose is connected to a pump for pumping fluid from the unused fluid storage tank. The rate at which fluid is pumped out is monitored and a flow control valve in the new fluid flow path is adjusted so that replacement fluid is pumped into the subassembly at the same flow rate as used fluid is being pumped out.
Claims12
Method for replacing fluid in an automatic transmission wherein said fluid is circulated through a remote cooler via conduits, comprising the steps of:
- intercepting one of said conduits to interconnect the upstream side with a used fluid receptacle, and the downstream side with a source of fresh fluid;
- causing the transmission pump to expel fluid into said receptacle at a controlled flow rate;
- and
- causing an external pump to force fresh fluid from said source into said transmission via the downstream side of the intercepted conduit at a flow rate matched to the rate at which fluid is being expelled into said receptacle.
Apparatus for replacing fluid in an automatic transmission wherein said fluid is circulated through a remote cooler via conduits, comprising:
- a receptacle for used fluid;
- a source of fresh fluid;
- a drain line for conducting used fluid issuing from the upstream side of one of said conduits to said receptacle;
- a flow control valve for regulating the flow rate of used fluid from the transmission through said drain line;
- a feed line for conducting fresh fluid from said source to the downstream side of said conduit;
- a pump disposed between said source and the downstream side of said conduit for forcing fresh fluid through said feed line into the transmission;
- and
- a flow control valve for regulating the flow rate of fresh fluid through said feed line into the transmission so as to match the flow rate of used fluid issuing from the transmission.
Apparatus for replacing fluid in an automatic transmission wherein said fluid is circulated through conduits, and comprising:
- a receptacle for used fluid;
- a container of fresh fluid;
- a drain line for conducting used fluid issuing from the upstream side of one of said conduits to said receptacle;
- a flow control valve for regulating the flow rate of used fluid from the transmission through said drain line;
- a feed line for conducting fresh fluid from said container to the downstream side of said conduit;
- and
- a pump disposed between said container and the downstream side of said conduit for forcing fresh fluid through said feed line into the transmission.
Apparatus for replacing fluid in an automatic transmission wherein said fluid is circulated through conduits, and comprising:
- a receptacle for used fluid;
- a container of fresh fluid;
- a drain line for conducting used fluid issuing from the upstream side of one of said conduits to said receptacle;
- a feed line for conducting fresh fluid from said source to the downstream side of said conduit;
- a pump disposed between said source and the downstream side of said conduit for forcing fresh fluid through said feed line into the transmission;
- and
- a flow control valve for regulating the flow rate of fresh fluid through said feed line into the transmission.
Dependencies are inferred from the claim text.