Patent US4573952A successfully refreshed from Google Patents.
US4573952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensioning device with a control mechanism for the tension of a belt
Assignee: Dr Ing HCF Porsche AG
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Filing: 1984-02-01
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Granted: 1986-03-04
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Expires: 2004-02-01
Abstract
Abstract A belt tensioning installation with a control device for the belt tension, which serves to monitor the tension of a belt, especially of a toothed belt, in order to prevent the relative position between driving and driven toothed belt pulley as a result of an excessive decrease of the belt tension. For that purpose an electric contact place is formed on a pressure element by way of which a tensioning roller is pressed against the toothed belt; the contact place is opened by spring force in case of a non-permissively reduced belt tension. An energizing circuit which includes the contact place is thereby interrupted and an optical or acoustic warning signal is triggered at an indicating apparatus by way of a relay.
Inventors
- 👤 Heinz Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:32
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/12; F16H7/1254; F16H2007/0802; F16H2007/0806; F16H2007/0863; F16H2007/0874; F16H2007/0889; F16H2007/0891; F16H2007/0893; F16H7/0829
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
159 words
A tensioning installation with a device for controlling the tension of a belt, comprising tensioning roller means, a tensioner housing means, and pressure means, the tensioning roller means being pressed against the belt by way of the pressure means being longitudinally displaceable within the tensioner housing means, said pressure means including an electric contact means responding to the tensioning force, said contact means being operable to trigger a warning signal at an indicating apparatus in case of a non-permissively reduced tension of the belt, said pressure means including said electric contact means having an electrically conducting contact pin, an insulating sleeve centered and fixed on the contact pin, an electrically conducting contact sleeve longitudinally guided on the insulating sleeve, and a compression spring stressed between a collar of the insulating sleeve and a recess of the contact sleeve, the contact means being located between an end face of the contact pin and a conical bottom of the contact sleeve.
Claim 2
Dependent Claim
159 words
A tensioning installation with a device for controlling the tension of a belt, comprising tensioning roller means, a tensioner housing means, and pressure means, the tensioning roller means being pressed against the belt by way of the pressure means being longitudinally displaceable within the tensioner housing means, said pressure means including an electric contact means responding to the tensioning force, said contact means being operable to trigger a warning signal at an indicating apparatus in case of a non-permissively reduced tension of the belt, said pressure means including said electric contact means having an electrically conducting contact pin, an insulating sleeve centered and fixed on the contact pin, an electrically conducting contact sleeve longitudinally guided on the insulating sleeve, and a compression spring stressed between a collar of the insulating sleeve and a recess of the contact sleeve, the contact means being located between an end face of the contact pin and a conical bottom of the contact sleeve.
Claim 3
Dependent Claim
47 words
A tensioning installation according to claim 1, wherein the contact means is opened in case of a decreasing belt tension by the force of the compression spring and is thereby operable to interrupt an electric circuit connected to the contact means and thus produces the warning signal.
Claim 4
Dependent Claim
36 words
A tensioning installation according to claim 2, wherein the pressure means is secured at the tensioner housing means by way of a roller bellows means which is retained in an annular groove of the contact sleeve.
Claim 5
Dependent Claim
36 words
A tensioning installation according to claim 1, wherein the pressure means is secured to the tensioner housing means by way of a roller bellows means which is retained in an annular groove of the contact sleeve.
Claim 6
Dependent Claim
42 words
A tensioning installation according to claim 4, wherein the contact pin is provided with a spherically shaped head portion that rests in a spherically shaped socket of a tensioning roller support means serving for the rotatable support of the tensioning roller means.
Claim 7
Dependent Claim
53 words
A tensioning installation according to claim 5, a quieting roller means is rotatably supported on the support means approximately at a right angle to the tensioning roller means, said quieting roller means rolling off along the inside of the belt whereas the tensioning roller means is pressed against the outside of the belt.
Claim 8
Dependent Claim
43 words
A tensioning installatin according to claim 6, wherein the contact sleeve includes a spherically shaped head, which abuts in a spherically shaped socket of a piston means longitudinally movably guided in the tensioner housing means and supported by several packets of bimetallic springs.
Claim 9
Dependent Claim
29 words
A tensioning installation according to claim 7, wherein the piston means is supported by several packets of bimetallic springs and is acted upon by pressure oil for damping purposes.
Claim 10
Dependent Claim
42 words
A tensioning installation according to claim 1, wherein the contact pin is provided with a spherically shaped head portion that rests in a spherically shaped socket of a tensioning roller support means serving for the rotatable support of the tensioning roller means.
Claim 11
Dependent Claim
54 words
A tensioning installation according to claim 9, wherein a quieting roller means is rotatably supported on the support means approximately at a right angle to the tensioning roller means, said quieting roller means rolling off along the inside of the belt whereas the tensioning roller means is pressed against the outside of the belt.
Claim 12
Dependent Claim
43 words
A tensioning installation according to claim 1, wherein the contact sleeve includes a spherically shaped head, which abuts in a spherically shaped socket of a piston means longitudinally movably guided in the tensioner housing means and supported by several packets of bimetallic springs.
Claim 13
Dependent Claim
29 words
A tensioning installation according to claim 11, wherein the piston means is supported by several packets of bimetallic springs and is acted upon by pressure oil for damping purposes.
Claim 14
Dependent Claim
42 words
A tensioning installation according to claim 11, wherein the contact pin is provided with a spherically shaped head portion that rests in a spherically shaped socket of a tensioning roller support means serving for the rotatable support of the tensioning roller means.
Claim 15
Dependent Claim
54 words
A tensioning installation according to claim 1, wherein a quieting roller means is rotatably supported on a support means approximately at a right angle to the tensioning roller means, said quieting roller means rolling off along the inside of the belt whereas the tensioning roller means is pressed against the outside of the belt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |