US5165506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamically variable multi-disc rotary shock absorber with viscous fluid
Assignee: Glaenzer Spicer SA
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Filing: 1991-02-28
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Granted: 1992-11-24
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Expires: 2011-02-28
Abstract
Abstract The invention provides a rotary shock absorber (10) of the type comprising a sealed hollow cylindrical housing (12) in which are arranged discs (50A, 50B) alternately integral in terms of rotation with the housing (12) or with a coaxial central shaft (22) mounted rotatably in the housing (12), the inner chamber (20) delimited by the housing (12) being filled at least partially with a viscous fluid received between the mutually confronting faces of the discs, characterized in that it comprises a displacement member (58) for varying the law of damping of the shock absorber as a function of the relative angular displacement of the central shaft (22) in relation to the housing (12).
Inventors
- 👤 Pierre Guimbretiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:39
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/10; F16F9/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
105 words
A rotary shock absorber (10) of the type comprising a sealed hollow cylindrical housing (12), in which are arranged sicks (50A, 50B) alternately integral in terms of rotation with the housing (12) or with a coaxial central shaft (22) mounted rotatably in the housing (12), the inner chamber (20) delimited by the housing (12) being filled at least partially with a viscous fluid received between the mutually confronting faces of the disks, wherein there are means for varying the law of damping of the shock absorber as a function of the relative angular displacement of the central shaft (22) in relation to the housing (12).
Claim 2
Dependent Claim
105 words
A rotary shock absorber (10) of the type comprising a sealed hollow cylindrical housing (12), in which are arranged sicks (50A, 50B) alternately integral in terms of rotation with the housing (12) or with a coaxial central shaft (22) mounted rotatably in the housing (12), the inner chamber (20) delimited by the housing (12) being filled at least partially with a viscous fluid received between the mutually confronting faces of the disks, wherein there are means for varying the law of damping of the shock absorber as a function of the relative angular displacement of the central shaft (22) in relation to the housing (12).
Claim 3
Dependent Claim
34 words
The rotary shock absorber as claimed in claim 1, wherein the means (58) for varying the law of damping act to vary the spacing between the mutually confronting faces of the disks (50A, 50B).
Claim 4
Dependent Claim
66 words
The rotary shock absorber as claimed in claim 2, further comprising means for varying the spacing between the mutually confronting faces of the disks comprise a member (58) for the axial displacement of the disks, arranged within the housing (12), and means (60, 62, 64, 76) for converting said relative angular displacement into an axial displacement of the member (58) for the displacement of the disks.
Claim 5
Dependent Claim
107 words
The shock absorber as claimed in claim 3, wherein the displacement member (58) is integral in terms of rotation with one of the two elements consisting of the housing (12) and the central shaft (22) and capable of being displaced axially relative to one of these two elements, and wherein it is connected to the other of said two elements (22, 12) as a result of an interaction of shapes (60, 62, 74, 76) provided respectively on the displacement member (58) and on the other of the two elements and converting said relative angular displacement into an axial displacement of the displacement member within said chamber (20).
Claim 6
Dependent Claim
40 words
The shock absorber as claimed in claim 4, wherein said interacting shapes comprise an external thread (60) and a complementary internal thread (62) which are formed respectively on the displacement member (58) or the other (22) of said two elements.
Claim 7
Dependent Claim
51 words
The shock absorber as claimed in claim 4, wherein said interacting shapes comprise a circular camtrack (74) connected in terms of rotation to the displacement member (58) or to said other element and a cam follower element (76) connected in terms of rotation to said other element or to said member.
Claim 8
Dependent Claim
32 words
The shock absorber as claimed in any one of claims 1 to 3, wherein the means for varying the law of damping act to vary the fluid pressure in said chamber (20).
Claim 9
Dependent Claim
72 words
The shock absorber as claimed in claim 3, wherein the displacement member comprises a portion (68) which extends outside the housing (12) so as to vary the volume of the part of the displacement member received in said chamber (20) as a function of the axial position of said member (58) in relation to the housing (12), in order thereby to vary the internal pressure of the fluid in said chamber (20).
Claim 10
Dependent Claim
50 words
The shock absorber as claimed in claim 8, wherein said variation in volume is an increase in the latter when the displacement member (58) is displaced axially relative to the housing (12) in the direction corresponding to a reduction of said spacing between the mutually confronting faces of the disks.
Claim 11
Dependent Claim
50 words
The shock absorber as claimed in claim 8, wherein said variation in volume is a reduction in the latter when the displacement member (58) is displaced axially relative to the housing (12) in the direction corresponding to a reduction of said spacing between the mutually confronting faces of the disks.
Claim 12
Dependent Claim
26 words
The shock absorber as claimed in claim 1, wherein the disks are mounted axially slidably relative to the housing (12) and to the central shaft (22).
Claim 13
Dependent Claim
20 words
The shock absorber as claimed in claim 1, wherein the mutually confronting faces of the disks have a fictional covering.
Claim 14
Dependent Claim
23 words
The shock absorber as claimed in claim 1, wherein the mutually confronting faces of the disks are capable of coming into mutual contact.
Claim 15
Dependent Claim
101 words
The rotary shock absorber (10) as claimed in claim 1, wherein there is an active member (80) which is arranged outside the housing and part (82) of which extends axially inside the housing through an orifice (84) made in a lateral flange (16) of the housing, in which it is received axially slidably, and a member (58) for the axial displacement of the active member (80) in relation to the housing (12), the displacements of which are controlled by means (60, 62) for converting said relative angular displacement into an axial displacement of the member for the displacement of the disks.
Claim 16
Dependent Claim
101 words
The rotary shock absorber as claimed in claim 14, wherein the displacement member (58) is integral in terms of rotation with one of the two elements consisting of the housing (12) and the central shaft (22) and is capable of being displaced axially relative to one of these two elements, and wherein it is connected to the other of said two elements as a result of an interaction of shapes (60, 62) provided respectively on the displacement member (58) and on the other of the two elements and converting said relative angular displacement into an axial displacement of the displacement member.
Claim 17
Dependent Claim
40 words
The shock absorber as claimed in claim 15, wherein said interacting shapes comprise an external thread (60) and a complementary internal thread (62) which are formed on the displacement member (58) or the other of said two elements (12, 22).
Claim 18
Dependent Claim
46 words
The rotary shock absorber as claimed in claim 14, wherein the active member (80) is a piston, of which the rod (82) is received in said orifice (84) and of which the head (90) arranged outside the housing (12) interacts with said axial displacement member (58).
Claim 19
Dependent Claim
39 words
The rotary shock absorber as claimed in claim 17, wherein said axial displacement member (58) is a disk, of which the face (92) confronting the housing interacts with the opposite face of the head (90) of said piston (80).
Claim 20
Dependent Claim
54 words
The rotary shock absorber as claimed in claim 17, wherein means (94) for the elastic return of the piston in the direction corresponding to the emergence of the rod (82) from the housing (12) are arranged between the piston head (90) and the opposite face (17) of the lateral flange (16) of the housing.
Claim 21
Dependent Claim
44 words
The rotary shock absorber as claimed in claim 14, wherein the active member (80) is a rod (82) which is received in said orifice (84) and of which the free end (89) arranged outside the housing is fastened to said axial displacement member (58).
Claim 22
Dependent Claim
33 words
The rotary shock absorber as claimed in claim 17, wherein the external thread (60) is formed on the displacement member (58), and wherein the complementary internal thread (62) is formed in the housing.
Claim 23
Dependent Claim
41 words
The rotary shock absorber as claimed in claim 20 taken in combination with claim 16, wherein said external thread (60) is formed on the central shaft (22), and wherein the complementary internal thread (62) is formed on the axial displacement member.
Claim 24
Dependent Claim
35 words
The shock absorber as claimed in claim 14, wherein sealing means (86) are arranged in the wall of said orifice (84) so as to in interact with the opposite surface of the active member (80).
Claim 25
Dependent Claim
27 words
The shock absorber as claimed in claim 14, wherein the part (88) of the active member (80) which extends inside the housing interacts with the opposite disk.
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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) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |