US3594024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston and rod assembly
Assignee: TDK Micronas GmbH
•
Filing: 1969-10-17
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Granted: 1971-07-20
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Expires: 1989-10-17
Abstract
Abstract A rigid piston and rod connection in a hydraulic accumulator wherein a piston rod extending through an axial bore in the piston has a retainer ring fitted in an annular groove in the piston rod. A cover plate over the end of the piston rod clamps the retainer ring between one side of the annular groove and a bearing plate on the front face of the piston to provide the rigid connection and hold the piston rod perpendicular to the piston.
Inventors
- 👤 Siegfried Hertell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/12; F16B; F16B2200/00; F16B2200/40; F16B2200/403; Y; Y10; Y10T; Y10T403/00; Y10T403/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
In combination, a piston having an axial bore through the center, a piston rod having an end extending through the bore in the piston, the rod having an annular groove in its periphery adjacent the end of the rod, a retainer ring in the annular groove, the retainer ring having an outer diameter substantially greater than the bore in the piston, an annular bearing plate between the retainer ring and the front face of the piston, a cover plate over the end of the piston rod and means for forcing the cover plate toward the piston to provide a rigid connection between the piston and piston rod.
Claim 2
Dependent Claim
107 words
In combination, a piston having an axial bore through the center, a piston rod having an end extending through the bore in the piston, the rod having an annular groove in its periphery adjacent the end of the rod, a retainer ring in the annular groove, the retainer ring having an outer diameter substantially greater than the bore in the piston, an annular bearing plate between the retainer ring and the front face of the piston, a cover plate over the end of the piston rod and means for forcing the cover plate toward the piston to provide a rigid connection between the piston and piston rod.
Claim 3
Dependent Claim
16 words
The combination as defined in claim 1 wherein the retainer ring is formed from several pieces.
Claim 4
Dependent Claim
44 words
The combination as defined in claim 1 wherein the parts of the bearing plate and annular groove in the piston rod in the area where they contact the retainer ring have the same cross-sectional shape as the retainer ring to provide maximum bearing surface.
Claim 5
Dependent Claim
37 words
The combination as defined in claim 3 wherein the retainer ring is circular in cross section and the recess in the bearing plate and the annular groove in the piston rod are circular segments in cross section.
Claim 6
Dependent Claim
27 words
The combination as defined in claim 1 wherein the means for forcing the cover plate toward the piston are bolts clamping the cover plate to the piston.
Claim 7
Dependent Claim
27 words
The combination as defined in claim 3 wherein the means for forcing the cover plate toward the piston are bolts clamping the cover plate to the piston.
Claim 8
Dependent Claim
27 words
The combination as defined in claim 4 wherein the means for forcing the cover plate toward the piston are bolts clamping the cover plate to the piston.
References Cited (Backward Citations)
SU180032A1
Cited
US861143A
Cited
US1179060A
Cited
US1418379A
Cited
FR641240A
Cited
US2650843A
Cited
US2897022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |