US4728834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact digital resolver/encoder assembly with flexible circuit board
Assignee: AUTOTECH CORP
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Filing: 1985-05-28
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Granted: 1988-03-01
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Expires: 2005-05-28
Abstract
Abstract The compact digital resolver/encoder assembly comprises a resolver and a flexible printed circuit board having a number of electronic components for decoding the resolver mounted on the flexible printed circuit board. A generally cylindrical container is provided having a cylindrical wall, a closed end and an open end. The circuit board is folded into a generally cylindrical shape and received in the container separate from the resolver. The circuit board is insulated from the container by an electrical insulating potting compound situated in the container and surrounding the circuit board. The resolver is received in the container and is spaced a predetermined distance from the encapsulated circuit board. Preferably a voltage regulator is mounted to an inside wall of the container and electrically coupled to the circuit board. Also, preferably, wire conductors between the resolver and the circuit board are longer than necessary to allow the resolver to be positioned outside the container when the potting compound is inserted in the container.
Inventors
- 👤 Shalabh Kumar
- 👤 Keith R. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:27
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/18; H05K1/189; G; G01; G01D; G01D11/00; G01D11/24; G01D11/245; H02; H02K; H02K11/00; H02K24/00; H02K5/00; H02K5/04; H02K5/22; H02K5/225; H02K2211/00; H02K2211/03; Y; Y10; Y10S; Y10S310/00; Y10S310/06
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
108 words
A compact digital resolver/encoder assembly comprising: a resolver; a flexible printed circuit board; a number of electronic components for decoding the resolver being mounted on said flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and an open end; said circuit board being folded into a generally cylindrical shape and being received in said container separate from said resolver; means for insulating said circuit board from said container including an electrical insulating potting compound situated in said container and surrounding said circuit board; and said resolver being received in said container and being spaced a predetermined distance from the encapsulated circuit board.
Claim 2
Dependent Claim
108 words
A compact digital resolver/encoder assembly comprising: a resolver; a flexible printed circuit board; a number of electronic components for decoding the resolver being mounted on said flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and an open end; said circuit board being folded into a generally cylindrical shape and being received in said container separate from said resolver; means for insulating said circuit board from said container including an electrical insulating potting compound situated in said container and surrounding said circuit board; and said resolver being received in said container and being spaced a predetermined distance from the encapsulated circuit board.
Claim 3
Dependent Claim
38 words
The resolver/encoder assembly of claim 1 wherein said insulating means further comprises a form in the central space of said cylindrical container with said potting compound being situated between said form and said cylindrical wall of said container.
Claim 4
Dependent Claim
27 words
The resolver/encoder assembly of claim 1 including a multi-terminal connector fixed to the bottom of said container, said connector being electrically coupled to said printed circuit board.
Claim 5
Dependent Claim
17 words
The resolver/encoder assembly of claim 1 wherein said resolver is electrically coupled to said printed circuit board.
Claim 6
Dependent Claim
85 words
The resolver/encoder assembly of claim 4 wherein said resolver is electrically coupled to said printed circuit board by insulated wire conductors which are longer than necessary for the coupling but long enough for allowing said resolver to be positioned outwardly of said container when said potting compound is inserted in said container and said central space is defined by an eccentric envelope, the eccentric portion providing space for said wire conductors, and said wire conductors are folded into loops and inserted into said eccentric space.
Claim 7
Dependent Claim
50 words
The resolver/encoder assembly of claim 5 wherein said eccentric space is formed by inserting a form having a generally tear drop cross-section in said container before said potting compound is inserted into said container and said annular space is defined between said form and the cylindrical wall of said container.
Claim 8
Dependent Claim
16 words
The resolver/encoder assembly of claim 6 wherein said form is made of an electrical insulating material.
Claim 9
Dependent Claim
38 words
The resolver/encoder assembly of claim 1 wherein said resolver/encoder includes a voltage regulator which is fixed on and to the inside of said container so that said container can serve as a heat sink for said voltage regulator.
Claim 10
Dependent Claim
36 words
The resolver/encoder assembly of claim 8 wherein said voltage regulator is fixed to the inside bottom wall of said container and said printed circuit board is positioned above said voltage regulator and physically isolated from same.
Claim 11
Dependent Claim
24 words
The resolver/encoder assembly of claim 1 wherein said circuit components are chosen, connected and operated in a manner which minimizes the heat generation therein.
Claim 12
Dependent Claim
54 words
The resolver/encoder assembly of claim 1 wherein said insulating means comprise a piece of insulating material is positioned within said container adjacent the inner surface of the cylindrical wall thereof before said potting compound is inserted in said container to ensure that there is no short circuit between said circuit board and said container.
Claim 13
Dependent Claim
12 words
The resolver/encoder assembly of claim 1 wherein said potting compound is R.T.V.
Claim 14
Dependent Claim
13 words
The resolver/encoder assembly of claim 1 wherein said potting compound is an epoxy.
Claim 15
Dependent Claim
33 words
The resolver/encoder assembly of claim 1 wherein substantially all the electronic components of the resolver/encoder are embedded in the potting compound so as to be substantially completely insulated from, and impervious to, moisture.
Claim 16
Dependent Claim
86 words
A compact digital resolver/encoder assembly comprising a resolver, electronic circuitry for decoding the resolver being formed in at least one integrated circuit chip mounted on a flexible circuit board; a container having a closed end and an open end; said integrated circuit chip and circuit board being received in said container adjacent a wall of said container; said resolver being mounted in said container separate and spaced from said circuit board; and means for insulating said integrated circuit chip from said resolver and from said container.
Claim 17
Dependent Claim
86 words
A compact digital resolver/encoder assembly comprising a resolver, electronic circuitry for decoding the resolver being formed in at least one integrated circuit chip mounted on a flexible circuit board; a container having a closed end and an open end; said integrated circuit chip and circuit board being received in said container adjacent a wall of said container; said resolver being mounted in said container separate and spaced from said circuit board; and means for insulating said integrated circuit chip from said resolver and from said container.
Claim 18
Dependent Claim
64 words
The resolver/encoder assembly of claim 1 wherein said circuit board is positioned adjacent a cylindrical wall of said container, said potting compound is located in a generally annular space in said container surrounding said circuit board in a manner so as to form a central space within the middle of said container; and said resolver is mounted in said central space in said container.
Claim 19
Dependent Claim
109 words
A compact digital resolver/encoder comprising: a resolver; a flexible circuit board; a number of electronic components for decoding the resolver being mounted on said flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and an open end; said circuit board being folded into a generally cylindrical shape and being received in said container; said resolver being received in said container separate from said circuit board and being spaced a predetermined distance from said printed circuit board; means for insulating said printed circuit board from said container; and an electrical connection including flexible insulated wire conductors between said resolver and said printed circuit board.
Claim 20
Dependent Claim
109 words
A compact digital resolver/encoder comprising: a resolver; a flexible circuit board; a number of electronic components for decoding the resolver being mounted on said flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and an open end; said circuit board being folded into a generally cylindrical shape and being received in said container; said resolver being received in said container separate from said circuit board and being spaced a predetermined distance from said printed circuit board; means for insulating said printed circuit board from said container; and an electrical connection including flexible insulated wire conductors between said resolver and said printed circuit board.
Claim 21
Dependent Claim
48 words
The resolver/encoder of claim 17 wherein said circuit board is positioned adjacent a cylindrical wall of said container, and said means for insulating said circuit board includes a potting compound which is disposed in a generally annular formation adjacent said cylindral wall and which surrounds said circuit board.
Claim 22
Dependent Claim
100 words
The resolver/encoder of claim 18 wherein said folded circuit board defines a central space, which is larger in cross-section than the cross-section of said resolver, said resolver is received in said central space and said electrical connection is defined by insulated wire conductors which are connected between said printed circuit board and said resolver and which are longer than necessary for the connection but long enough for allowing said resolver to be positioned outwardly of said container when said potting compound is inserted in said container, said wire conductors afterwards being folded into loops and inserted into said central space.
Claim 23
Dependent Claim
94 words
A compact digital resolver/encoder assembly comprising: a resolver; a flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and open end; said circuit board being folded into a generally cylindrical shape and being received in said container; said resolver being received in said container separate from said circuit board and being spaced a predetermined distance apart from said printed circuit board; and a voltage regulator which is fixed to said container inside said container so that said container can serve as a heat sink for said voltage regulator.
Claim 24
Dependent Claim
94 words
A compact digital resolver/encoder assembly comprising: a resolver; a flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and open end; said circuit board being folded into a generally cylindrical shape and being received in said container; said resolver being received in said container separate from said circuit board and being spaced a predetermined distance apart from said printed circuit board; and a voltage regulator which is fixed to said container inside said container so that said container can serve as a heat sink for said voltage regulator.
Claim 25
Dependent Claim
20 words
The resolver/encoder assembly of claim 20 wherein said voltage regulator is mounted on the inside bottom wall of said container.
Claim 26
Dependent Claim
31 words
The resolver/encoder assembly of claim 20 wherein said circuit board is encapsulated in a potting compound which also covers said voltage regulator and insulates said voltage regulator from said circuit board.
Claim 27
Dependent Claim
161 words
A compact digital resolver/encoder comprising: a resolver, a flexible printed circuit board; a number of electronic components for decoding the resolver being mounted on said flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and an open end; said circuit board being folded into a generally cylindrical shape, being received in said container, and defining a central space; means for insulating said circuit board from said container; said resolver being mounted in said container within said central space and spaced a predetermined distance from said circuit board; and an electrical connection between said printed circuit board and said resolver, said electrical connection including insulated wire conductors which are longer than necessary for the connection but long enough for allowing said resolver to be positioned outwardly of said container when said circuit board is inserted in said container, after which said wire conductors are folded into loops and inserted into said central space with said resolver.
Claim 28
Dependent Claim
161 words
A compact digital resolver/encoder comprising: a resolver, a flexible printed circuit board; a number of electronic components for decoding the resolver being mounted on said flexible printed circuit board; a generally cylindrical container having a cylindrical wall, a closed end and an open end; said circuit board being folded into a generally cylindrical shape, being received in said container, and defining a central space; means for insulating said circuit board from said container; said resolver being mounted in said container within said central space and spaced a predetermined distance from said circuit board; and an electrical connection between said printed circuit board and said resolver, said electrical connection including insulated wire conductors which are longer than necessary for the connection but long enough for allowing said resolver to be positioned outwardly of said container when said circuit board is inserted in said container, after which said wire conductors are folded into loops and inserted into said central space with said resolver.
Claim 29
Dependent Claim
110 words
A compact digital resolver/encoder comprising: a resolver, a container having a cylindrical wall, a closed end and an open end; electronic circuitry for decoding the resolver formed in at least one integrated circuit chip mounted on a flexible printed circuit board, which is received in said container separate from said resolver; said resolver being received in said container and spaced a predetermined distance from the integrated circuit chip; means for insulating said integrated circuit chip from said container and said resolver; and a voltage regulator which is fixed on and to the inside of said container so that said container can serve as a heat sink for said voltage regulator.
Claim 30
Dependent Claim
110 words
A compact digital resolver/encoder comprising: a resolver, a container having a cylindrical wall, a closed end and an open end; electronic circuitry for decoding the resolver formed in at least one integrated circuit chip mounted on a flexible printed circuit board, which is received in said container separate from said resolver; said resolver being received in said container and spaced a predetermined distance from the integrated circuit chip; means for insulating said integrated circuit chip from said container and said resolver; and a voltage regulator which is fixed on and to the inside of said container so that said container can serve as a heat sink for said voltage regulator.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |