US3687013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic speed control for air cylinders
Assignee: Individual
•
Filing: 1970-12-23
•
Granted: 1972-08-29
•
Expires: 1990-12-23
Abstract
Abstract A two-piston cylinder unit with air actuation through two separate parts controlling one piston, the other piston in an oil-filled speed control section. The hydraulic cylinder controls, or limits, the speed or movement of the air cylinder, and a specified speed rate may be achieved for any section or part of the total or complete movement by means of in-built control rods and cooperating aperture.
Inventors
- 👤 Hans R Haller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:31
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B11/076; F15B2211/00; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7055; F15B2211/7056; F15B2211/75; F15B2211/80; F15B2211/885; F15B2211/8855
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
Hydraulic speed control for air cylinders comprising a cylindrical casing, a centrally disposed rod extending substantially throughout the length of said casing, a pair of pistons secured onto and spatially disposed on said rod, means forming an air receiving chamber within said casing on a side of each of said pistons, air port means to apply air to and from said air receiving chambers, means forming a hydraulic chamber within said casing on the other side of each of said pistons, hydraulic port means to allow fluid flow to and from said hydraulic chamber, fluid port means communicating with said hydraulic chambers, a shaped interchangeable contoured part cooperatively disposed with orifice means within said hydraulic chamber, wherein as air is applied through one of the air ports to one of the air receiving chambers, the pistons are accordingly displaced and fluid is displaced from one of said hydraulic chambers to the other, conditioned on the controlled displacement effectuated by the shaped interchangeable contoured part cooperating with said orifice means.
Claim 2
Dependent Claim
169 words
Hydraulic speed control for air cylinders comprising a cylindrical casing, a centrally disposed rod extending substantially throughout the length of said casing, a pair of pistons secured onto and spatially disposed on said rod, means forming an air receiving chamber within said casing on a side of each of said pistons, air port means to apply air to and from said air receiving chambers, means forming a hydraulic chamber within said casing on the other side of each of said pistons, hydraulic port means to allow fluid flow to and from said hydraulic chamber, fluid port means communicating with said hydraulic chambers, a shaped interchangeable contoured part cooperatively disposed with orifice means within said hydraulic chamber, wherein as air is applied through one of the air ports to one of the air receiving chambers, the pistons are accordingly displaced and fluid is displaced from one of said hydraulic chambers to the other, conditioned on the controlled displacement effectuated by the shaped interchangeable contoured part cooperating with said orifice means.
Claim 3
Dependent Claim
39 words
The invention according to claim 1 wherein interchangeable contoured part extends between said pistons, each of said hydraulic chambers being disposed between said pistons forming a fluid driving space, and said orifice means disposed intermediate said pistons. (FIG. 2)
Claim 4
Dependent Claim
19 words
The invention according to claim 1 wherein said rod has an end to which a load means is connected.
Claim 5
Dependent Claim
18 words
The invention according to claim 2 wherein said fluid port means are disposed immediately adjacent said orifice means.
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |