Patent US5390770A successfully refreshed from Google Patents.
US5390770A
Expired / Lapsed
US
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Rotation deceleration device
Assignee: Panasonic Holdings Corp
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Filing: 1993-07-20
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Granted: 1995-02-21
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Expires: 2013-07-20
Abstract
Abstract A rotation deceleration device used for a sanitary cleaning device which includes a toilet seat and a toilet cover and is attached to a toilet bowl, thereby injecting warm water in the toilet bowl. The rotation deceleration device includes a cylinder having a hydraulic chamber filled with a control oil; a rotation shaft inserted through the cylinder; a control wall radially projected from the rotation shaft to divide the hydraulic chamber into at least two sub chambers; a control valve provided between the control wall and an inner surface of the cylinder. The control valve has a closing wall opposed to a side surface of the control wall so as to be attachable thereto and also has an engaging member opposed to the other side of the control wall so as to be engageable therewith in accordance with the rotation of the rotation shaft. The control valve is formed of a material which has a higher coefficient of thermal expansion than that of a material forming the control wall and the cylinder.
Inventors
- 👤 Shinjiro Miyahara
- 👤 Kazuaki Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:17
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/50; F16F9/52; A; A47; A47K; A47K13/00; A47K13/10; E; E05; E05F; E05F3/00; E05F3/14; F16F9/10; F16F9/14; F16F9/145; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/23; E05Y2201/232; E05Y2201/252; E05Y2201/254; E05Y2201/256; E05Y2201/262; E05Y2201/266; E05Y2201/40; E05Y2201/43; E05Y2201/448; E05Y2201/458; E05Y2999/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
159 words
A rotation deceleration device, comprising: a cylinder having a hydraulic chamber filled with a control oil; a rotation shaft inserted through the cylinder; control wall means radially projected from the rotation shaft to divide the hydraulic chamber into at least two sub chambers; control valve means provided between the control wall means and an inner surface of the cylinder, the control valve means having closing means opposed to a side surface of the control wall means so as to be attachable thereto and also having an engaging member opposed to the other side of the control wall means so as to be engageable therewith in accordance with the rotation of the rotation shaft, wherein the control valve means is formed of a material which has a higher coefficient of thermal expansion than that of a material forming the control wall means and the cylinder, and the control wall means is interposed between the engaging member and the closing means.
Claim 2
Dependent Claim
159 words
A rotation deceleration device, comprising: a cylinder having a hydraulic chamber filled with a control oil; a rotation shaft inserted through the cylinder; control wall means radially projected from the rotation shaft to divide the hydraulic chamber into at least two sub chambers; control valve means provided between the control wall means and an inner surface of the cylinder, the control valve means having closing means opposed to a side surface of the control wall means so as to be attachable thereto and also having an engaging member opposed to the other side of the control wall means so as to be engageable therewith in accordance with the rotation of the rotation shaft, wherein the control valve means is formed of a material which has a higher coefficient of thermal expansion than that of a material forming the control wall means and the cylinder, and the control wall means is interposed between the engaging member and the closing means.
Claim 3
Dependent Claim
34 words
A rotation deceleration device according to claim 1, wherein the control wall means and the control valve means are each provided in a symmetrical pair with a rotation center of the rotation shaft therebetween.
Claim 4
Dependent Claim
36 words
A rotation deceleration device according to claim 2 further comprising O-rings, for sealing the gap between the cylinder and the rotation shaft, at an end portion of the cylinder from which the rotation shaft is extended.
Claim 5
Dependent Claim
26 words
A rotation deceleration device according to claim 2, wherein two of the at least two sub chambers are a pressurizing chamber and a pressure reducing chamber.
Claim 6
Dependent Claim
20 words
A rotation deceleration device according to claim 1, wherein the cylinder includes a connection boss having a polygonal cross section.
Claim 7
Dependent Claim
18 words
A rotation deceleration device according to claim 5, wherein the polygonal cross section is a hexagonal cross section.
Claim 8
Dependent Claim
19 words
A rotation deceleration device according to claim 1, wherein the rotation shaft is equipped with a polygonal connection member.
Claim 9
Dependent Claim
18 words
A rotation deceleration device according to claim 7, wherein the polygonal connection member is a hexagonal connection member.
Claim 10
Dependent Claim
36 words
A rotation deceleration device according to claim 1 further comprising O-rings, for sealing the gap between the cylinder and the rotation shaft, at an end portion of the cylinder from which the rotation shaft is extended.
Claim 11
Dependent Claim
26 words
A rotation deceleration device according to claim 1, wherein two of the at least two sub chambers are a pressurizing chamber and a pressure reducing chamber.
Claim 12
Dependent Claim
31 words
A rotation deceleration device according to claim 1, wherein the control valve means has a cutout through which the pressurizing chamber and the pressure reducing chamber are connected to each other.
Claim 13
Dependent Claim
33 words
A rotation deceleration device according to claim 11, wherein the control wall means and the control valve means are each provided in a symmetrical pair with a rotation center of the rotation shaft.
Claim 14
Dependent Claim
20 words
A rotation deceleration device according to claim 11, wherein the cylinder includes a connection boss having a polygonal cross section.
Claim 15
Dependent Claim
32 words
A rotational deceleration device according to claim 1, wherein the rotation shaft includes an end portion extended from the cylinder, the end portion including a connection member having a polygonal cross section.
Claim 16
Dependent Claim
151 words
A rotation deceleration device, comprising: a cylinder having hydraulic chamber filled with a control oil; a rotation shaft inserted through the cylinder; a control wall radially projected from the rotation shaft to divide the hydraulic chamber into at least two sub chambers; a control valve provided between the control wall and an inner surface of the cylinder, the control valve having a closing wall opposed to a side surface of the control wall so as to be attachable thereto and also having an engaging member opposed to the other side of the control wall so as to engageable therewith in accordance with the rotation of the rotation shaft, wherein the control valve is formed of a material which has a higher coefficient of thermal expansion than that of a material forming the control wall and the cylinder, and the control wall is interposed between the engaging member and the closing wall.
Claim 17
Dependent Claim
151 words
A rotation deceleration device, comprising: a cylinder having hydraulic chamber filled with a control oil; a rotation shaft inserted through the cylinder; a control wall radially projected from the rotation shaft to divide the hydraulic chamber into at least two sub chambers; a control valve provided between the control wall and an inner surface of the cylinder, the control valve having a closing wall opposed to a side surface of the control wall so as to be attachable thereto and also having an engaging member opposed to the other side of the control wall so as to engageable therewith in accordance with the rotation of the rotation shaft, wherein the control valve is formed of a material which has a higher coefficient of thermal expansion than that of a material forming the control wall and the cylinder, and the control wall is interposed between the engaging member and the closing wall.
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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) | 1998-02-20 | 1998-08-22 | 1999-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-20 | 2002-08-22 | 2003-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-20 | 2006-08-22 | 2007-02-21 | $7700.00 | Window Closed / Lapsed |