US3918693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorber
Assignee: GREE HYDRAULICS OF CALIFORNIA Inc
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Filing: 1974-10-21
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Granted: 1975-11-11
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Expires: 1994-10-21
Abstract
Abstract This invention relates to a shock absorber of the type comprising a cylindrical outer casing having a closed mouth and also being closed at the other end, the closed end having an axial port. Positioned in the outer casing and extending longitudinally thereof is an inner casing of smaller diameter than the outer casing to define a chamber therebetween, the inner casing having one end closed by a plug and the other end closed and longitudinally spaced from the end of the outer casing, the bore of the inner casing slidably mounting a piston having an axially extending piston rod secured at one end thereto, with the other end of the piston rod protruding through an axial bore in the plug and normally resiliently urged outwardly. The piston rod has valve controlled means to permit flow of fluid from the portion of the inner casing bore adjacent the closed end of such casing to the portion of the inner casing bore on the other side of the piston and to restrain flow in the opposite direction. In addition, perforations are provided in the wall of the inner casing to permit flow of fluid from one side of the piston through the perforations to the other side of the piston. A bladder of resilient material encompasses the major portion of the length of the inner casing and the closed end of the bladder mounts a valve member which is axially aligned with an axial bore in the closed end of the inner casing and normally urged against the valve seat defined by the outer end of said axial bore. Adjustment means accessible from the exterior, through the axial port in the closed end of the outer casing is provided to determine the amount of movement of the valve means away from the valve seat defined at the outer end of the axial bore in the closed end of the inner casing.
Inventors
- 👤 Abduz Zahid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:22
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R19/32; F; F16; F16F; F16F9/00; F16F9/06; F16F9/08; F16F9/092; F16F9/10; F16F9/14; F16F9/16; F16F9/18; F16F9/19
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
386 words
A shock absorber comprising and outer cylindrical casing closed at one end and having a mouth at its other end, an inner cylindrical casing closed at one end and having a mouth at its other end, said inner casing being positioned in said outer casing coaxial therewith and transversely placed therefrom to define an elongated annular chamber, said inner casing having a body portion having passageways therethrough, an elongated resilient deformable and expandible substantially cylindrical bladder positioned in said annular chamber and extending substantially the length thereof and encompassing said inner casing to define a variable volume liquid chamber between the inner casing and said bladder, said bladder being closed at one end and having a mouth at its opposed end, an annular supporting member of rigid material having a cylindrical retaining portion and a reduced diameter mounting portion, the junction between said portions defining an annular shoulder, the mouth of said bladder being secured to said mounting portion, the portion of said inner casing adjacent its mouth being of enlarged diameter, the junction between said enlarged diameter mouth portion and the body portion of said casing defining an annular shoulder, said annular supporting member being positioned in the mouth of the outer casing with the cylindrical retaining portion in juxtaposition with the wall of the outer casing, said enlarged diameter mouth portion of the inner casing being positioned in said supporting member with the outer surface of said enlarged diameter portion of said inner casing in juxtaposition with the wall of the cylindrical retaining portion and with the annular shoulder of the enlarged diameter mouth portion abutting against the annular shoulder of said supporting member and means to retain said inner casing and said annular supporting member in fixed sealed position with respect to the outer casing, a closure member having an axial bore, positioned in the mouth of said inner casing, means retaining said closure member in fixed position, a piston slidably moUnted in said inner casing, said piston defining a variable volume chamber on each side thereof, said piston having a piston rod extending axially therefrom through the axial bore in the closure member, check valve means to permit flow of liquid only from one of said chambers to the other, and means to extend said piston rod outwardly from said closure member.
Claim 2
Dependent Claim
386 words
A shock absorber comprising and outer cylindrical casing closed at one end and having a mouth at its other end, an inner cylindrical casing closed at one end and having a mouth at its other end, said inner casing being positioned in said outer casing coaxial therewith and transversely placed therefrom to define an elongated annular chamber, said inner casing having a body portion having passageways therethrough, an elongated resilient deformable and expandible substantially cylindrical bladder positioned in said annular chamber and extending substantially the length thereof and encompassing said inner casing to define a variable volume liquid chamber between the inner casing and said bladder, said bladder being closed at one end and having a mouth at its opposed end, an annular supporting member of rigid material having a cylindrical retaining portion and a reduced diameter mounting portion, the junction between said portions defining an annular shoulder, the mouth of said bladder being secured to said mounting portion, the portion of said inner casing adjacent its mouth being of enlarged diameter, the junction between said enlarged diameter mouth portion and the body portion of said casing defining an annular shoulder, said annular supporting member being positioned in the mouth of the outer casing with the cylindrical retaining portion in juxtaposition with the wall of the outer casing, said enlarged diameter mouth portion of the inner casing being positioned in said supporting member with the outer surface of said enlarged diameter portion of said inner casing in juxtaposition with the wall of the cylindrical retaining portion and with the annular shoulder of the enlarged diameter mouth portion abutting against the annular shoulder of said supporting member and means to retain said inner casing and said annular supporting member in fixed sealed position with respect to the outer casing, a closure member having an axial bore, positioned in the mouth of said inner casing, means retaining said closure member in fixed position, a piston slidably moUnted in said inner casing, said piston defining a variable volume chamber on each side thereof, said piston having a piston rod extending axially therefrom through the axial bore in the closure member, check valve means to permit flow of liquid only from one of said chambers to the other, and means to extend said piston rod outwardly from said closure member.
Claim 3
Dependent Claim
46 words
The combination set forth in claim 1 in which the outer edge of the annular supporting member is flush with the mouth of the outer casing and weld means are provided to retain said outer edge and mouth in fixed position and to define a seal.
Claim 4
Dependent Claim
37 words
The combination set forth in claim 1 in which screw extends transversely through the outer casing adjacent its mouth and through said supporting member into a threaded bore in the enlarged diameter portion of the inner casing.
Claim 5
Dependent Claim
307 words
A shock absorber comprising an outer cylindrical casing closed at one end and having a mouth at its other end, an inner cylindrical casing closed at one end and having a mouth at its other end, said inner casing being positioned in said outer casing coaxial therewith and transversely placed therefrom to define an elongated annular chamber, said inner casing having a body portion having passageways therethrough, an elongated resilient deformable and expandible bladder positioned in said annular chamber and extending substantially the length thereof and encompassing said inner casing to define a variable volume liquid chamber between the inner casing and said bladder, said bladder being closed at one end and having a mouth at its opposed end, said bladder snugly engaging the body portion and closed end of said inner casing, said closed end of said inner casing having an axial bore therethrough, the outer end of which defines a valve seat, a valve member secured to the closed end of the bladder and extending axially thereinto and normally seated on said valve seat to close the latter, means securely retaining the mouth of said bladder in fixed position adjacent the mouths of said casings, means securely retaining the mouth of said inner casing in fixed sealed position with respect to the mouth of said outer casing, a closure member having an axial bore, positioned in the mouth of said inner casing, means retaining said closure member in fixed position, a piston slidably mounted in said inner casing, said piston defining a variable volume chamber on each side thereof, said piston having a piston rod extending axially therefrom through the axial bore in the closure member, check valve means to permit flow of liquid only from one of said chambers to the other, and means to extend said piston rod outwardly from said closure member.
Claim 6
Dependent Claim
307 words
A shock absorber comprising an outer cylindrical casing closed at one end and having a mouth at its other end, an inner cylindrical casing closed at one end and having a mouth at its other end, said inner casing being positioned in said outer casing coaxial therewith and transversely placed therefrom to define an elongated annular chamber, said inner casing having a body portion having passageways therethrough, an elongated resilient deformable and expandible bladder positioned in said annular chamber and extending substantially the length thereof and encompassing said inner casing to define a variable volume liquid chamber between the inner casing and said bladder, said bladder being closed at one end and having a mouth at its opposed end, said bladder snugly engaging the body portion and closed end of said inner casing, said closed end of said inner casing having an axial bore therethrough, the outer end of which defines a valve seat, a valve member secured to the closed end of the bladder and extending axially thereinto and normally seated on said valve seat to close the latter, means securely retaining the mouth of said bladder in fixed position adjacent the mouths of said casings, means securely retaining the mouth of said inner casing in fixed sealed position with respect to the mouth of said outer casing, a closure member having an axial bore, positioned in the mouth of said inner casing, means retaining said closure member in fixed position, a piston slidably mounted in said inner casing, said piston defining a variable volume chamber on each side thereof, said piston having a piston rod extending axially therefrom through the axial bore in the closure member, check valve means to permit flow of liquid only from one of said chambers to the other, and means to extend said piston rod outwardly from said closure member.
Claim 7
Dependent Claim
24 words
The combination set forth in claim 4 in which means are provided to limit the movement of said valve member away from its seat.
Claim 8
Dependent Claim
119 words
The combination set forth in claim 4 in which the closed end of said outer casing has an axial opening, an internally threaded sleeve extends axially outward from the closed end of said outer casing and is aligned with said axial opening in said outer casing, said valve member has a rigid member extending axially outward from the closed end of said bladder, said rigid member having an axial bore extending partially thereinto, a threaded adjustment screw is positioned in said threaded sleeve to coact therewith, said screw having an axial stem secured at one end to the inner end of said screw with the other end of said stem slidably mounted in the bore of said rigid member.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |