Helical spring for a pump having an adjustable delivery volume
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 28, 2023
Grant Date -
N/A
app pub date -
Aug 27, 2021
filing date -
Aug 28, 2020
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pump having an adjustable delivery volume, including: a pump housing featuring a delivery chamber which includes a delivery chamber inlet for a fluid and a delivery chamber outlet for the fluid; a delivery member, which can be rotated within the delivery chamber, for delivering the fluid; an adjusting device featuring a setting structure, which is mounted such that it can move back and forth within the pump housing in order to adjust the delivery volume of the pump, and a helical spring for applying a spring force, which acts in a setting direction, to the setting structure, wherein the windings of the helical spring are enclosed by an envelope lying on the outside of the helical spring wherein the cross-sectional area of the envelope as measured transversely with respect to the longitudinal direction of the spring changes progressively in the longitudinal direction of the spring.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2021 Application Filing Year
- F04C Class
- 345 Applications Filed
- 225 Patents Issued To-Date
- 65.22 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- F04C Class
- 93.42 % this patent is cited more than
- 2 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Aug 28, 2026 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 28, 2030 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 28, 2034 |