Patent US3756279A successfully refreshed from Google Patents.
US3756279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve plate body for axial piston device
Assignee: Robert Bosch GmbH
•
Filing: 1970-12-24
•
Granted: 1973-09-04
•
Expires: 1990-12-24
Abstract
Abstract Valve plate body for axial piston device, comprising at least two superimposed rigid discs, each having valve openings, and one layer of resilient material between each adjacent pair of superimposed rigid discs, said layer of resilient material being thinner than each of said rigid discs and at least surrounding said valve openings.
Inventors
- 👤 D Widmaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:37
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/2014; F04B1/2042; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
A stationary valve plate body for an axial piston device, said valve plate body comprising two superimposed rigid disks, each having valve openings; and a layer of resilient material between said superimposed rigid disks and at least surrounding said valve openings, at least one of said rigid disks being thinner in the region of said disk between its outer periphery and the adjacent valve opening so that the space between said disk is wider in said thinner region of said one disk than in the remaIning regions of said one disk, said space between said disks about said valve openings being filled by said layer of resilient material and the portion of said layer between said remaining regions of said one disk and the other disk being thinner than each of said disks in the region of the thinner region thereof.
Claim 2
Dependent Claim
141 words
A stationary valve plate body for an axial piston device, said valve plate body comprising two superimposed rigid disks, each having valve openings; and a layer of resilient material between said superimposed rigid disks and at least surrounding said valve openings, at least one of said rigid disks being thinner in the region of said disk between its outer periphery and the adjacent valve opening so that the space between said disk is wider in said thinner region of said one disk than in the remaIning regions of said one disk, said space between said disks about said valve openings being filled by said layer of resilient material and the portion of said layer between said remaining regions of said one disk and the other disk being thinner than each of said disks in the region of the thinner region thereof.
Claim 3
Dependent Claim
20 words
A stationary valve plate body as defined in claim 1, wherein said wider space tapers towards said adjacent valve opening.
Claim 4
Dependent Claim
71 words
A stationary valve plate body for an axial piston device, said valve plate body comprising a stack of superimposed rigid disks, each having valve openings aligned with the valve openings in the other of said stack of disks; and a layer of resilient material between each adjacent pair of superimposed rigid disks, said layer of resilient material being thinner than each of said rigid disks and at least surrounding said openings.
Claim 5
Dependent Claim
71 words
A stationary valve plate body for an axial piston device, said valve plate body comprising a stack of superimposed rigid disks, each having valve openings aligned with the valve openings in the other of said stack of disks; and a layer of resilient material between each adjacent pair of superimposed rigid disks, said layer of resilient material being thinner than each of said rigid disks and at least surrounding said openings.
Claim 6
Dependent Claim
22 words
Valve plate body as defined in claim 3, wherein each layer of resilient material is firmly attached to said adjacent rigid discs.
Claim 7
Dependent Claim
18 words
Valve plate body as defined in claim 3, wherein each layer of resilient material is of uniform thickness.
Claim 8
Dependent Claim
31 words
Valve plate body as defined in claim 3, wherein said layers of resilient material correspond in size and configuration to the end faces of respectively adjacent one of said rigid discs.
Claim 9
Dependent Claim
19 words
Valve plate body as defined in claim 3, wherein the layers of resilient material are each of uniform thickness.
Claim 10
Dependent Claim
26 words
Valve plate body as defined in claim 3, wherein at least one of said discs is composed at least in part of material having anti-friction properties.
Claim 11
Dependent Claim
25 words
Valve plate body as defined in claim 8 wherein said material having good anti-friction properties is selected from the group consisting of bronze and brass.
Claim 12
Dependent Claim
27 words
Valve plate body as defined in claim 3, wherein said valve openings comprise two diametrically opposite arcuate slots having the same center and equal radii of curvature.
Claim 13
Dependent Claim
24 words
A valve plate body as defined in claim 3, and including holding means for preventing said disks from turning with respect to each other.
Claim 14
Dependent Claim
21 words
Valve plate body as defined in claim 11, wherein said holding means comprises a pin passing through all of said discs.
Claim 15
Dependent Claim
102 words
A stationary valve plate body for an axial piston device, said valve plate body comprising at least two superimposed disks, each having valve openings; a layer of resilient material between each adjacent pair of superimposed disks, said layer of resilient material being thinner than each of said rigid disks and at least surrounding said openings; and a lining around the interior of at least one opening integral with said layer of resilient material and firmly joined to said disks for preventing the extrusion of said layer from the region around said opening when said valve plate body is operated at high pressure.
Claim 16
Dependent Claim
102 words
A stationary valve plate body for an axial piston device, said valve plate body comprising at least two superimposed disks, each having valve openings; a layer of resilient material between each adjacent pair of superimposed disks, said layer of resilient material being thinner than each of said rigid disks and at least surrounding said openings; and a lining around the interior of at least one opening integral with said layer of resilient material and firmly joined to said disks for preventing the extrusion of said layer from the region around said opening when said valve plate body is operated at high pressure.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |