US3695787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Through running and pressure pump
Assignee: Individual
•
Filing: 1970-06-04
•
Granted: 1972-10-03
•
Expires: 1990-06-04
Abstract
Abstract The specification describes a reciprocating piston pump for manual or power driven operation. It comprises a piston, a cylinder for the piston, a piston tube carrying the piston and valves adjacent to an outer end of the piston tube ad to the other end of the pump for regulating flow through the pump. The valves are provided with means for operating them by mechanical friction on relative movement taking place between the piston tube and the cylinder.
Inventors
- 👤 Johann Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:05
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/129; F04B9/00; F04B9/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
140 words
A suction and force pump comprising a cylinder, a piston displaceable in said cylinder, a piston tube having interior walls and an abutment face, said piston being mounted on said piston tube, said cylinder being provided with inlet and outlet means, inlet and outlet valves adjacent said inlet and outlet means respectively, means for opening and closing said inlet and outlet valves when said piston is displaced in said cylinder including elongated guide elements secured to said inlet and outlet valves, the guide element secured to said outlet valve being mounted interiorly of the guide element of said inlet valve and in frictional engagement therewith, resilient shoe means on said guide element secured to said inlet valve for engaging said interior walls of said piston tube, said shoe means being adapted to engage said abutment face of said piston tube.
Claim 2
Dependent Claim
140 words
A suction and force pump comprising a cylinder, a piston displaceable in said cylinder, a piston tube having interior walls and an abutment face, said piston being mounted on said piston tube, said cylinder being provided with inlet and outlet means, inlet and outlet valves adjacent said inlet and outlet means respectively, means for opening and closing said inlet and outlet valves when said piston is displaced in said cylinder including elongated guide elements secured to said inlet and outlet valves, the guide element secured to said outlet valve being mounted interiorly of the guide element of said inlet valve and in frictional engagement therewith, resilient shoe means on said guide element secured to said inlet valve for engaging said interior walls of said piston tube, said shoe means being adapted to engage said abutment face of said piston tube.
Claim 3
Dependent Claim
30 words
A suction and force pump as claimed in claim 1, wherein said outlet valve is formed with guide and abutment ribs, and said inlet valve is formed with guide ribs.
Claim 4
Dependent Claim
70 words
A suction and force pump, as claimed in claim 1, wherein said guide element secured to said outlet valve has an outside diameter slightly larger than the inside diameter of the guide element secured to the inlet valve and is provided with a plurality of radial slots so that said guide element secured to said outlet valve frictionally engages the interior of the guide element secured to the inlet valve.
References Cited (Backward Citations)
US2678006A
Cited
DE829407C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |