US4319699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable sprayer actuated by user's body movement
Assignee: DAS Pumps Pty Ltd
•
Filing: 1980-06-25
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Granted: 1982-03-16
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Expires: 2000-06-25
Abstract
Abstract A portable spraying device having a pressurizable container and a reciprocating piston pump for pressurizing the container. The pump is attachable between the back and thigh of the user so that relative movement between these body parts during walking is operative to drive the pump so as to pressurize the container.
Inventors
- 👤 Albertus V. Z. Willers
- 👤 Willem J. Neser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/03; B05B9/04; B05B9/08; B05B9/0805; B05B9/0811; F; F04; F04B; F04B33/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A portable spraying device for spraying a liquid, which comprises a pressurizable container for containing the liquid to be sprayed, attachment means for locating the container on the back of the user, a pump connected to the container and having a cylinder and a piston disposed in the cylinder for pressurizing the container, means to move the piston within the cylinder comprising a thigh band for securing to a thigh of the user and a lever arm attached to the thigh band so as, in use, to extend rearwardly and away from a user's leg in the generally vertical plane of movement of the leg during walking, means connecting the lever arm to one of the piston and the cylinder at a point spaced from the point of attachment of the lever arm to the thigh band so as to effect relative movement between the piston and the cylinder during walking.
Claim 2
Dependent Claim
151 words
A portable spraying device for spraying a liquid, which comprises a pressurizable container for containing the liquid to be sprayed, attachment means for locating the container on the back of the user, a pump connected to the container and having a cylinder and a piston disposed in the cylinder for pressurizing the container, means to move the piston within the cylinder comprising a thigh band for securing to a thigh of the user and a lever arm attached to the thigh band so as, in use, to extend rearwardly and away from a user's leg in the generally vertical plane of movement of the leg during walking, means connecting the lever arm to one of the piston and the cylinder at a point spaced from the point of attachment of the lever arm to the thigh band so as to effect relative movement between the piston and the cylinder during walking.
Claim 3
Dependent Claim
38 words
A portable spraying device according to claim 1, including means to vary the spacing between the point of attachment of the lever arm to the thigh band and the connection to one of the piston and the cylinder.
Claim 4
Dependent Claim
17 words
A portable spraying device according to claim 2, wherein the lever arm is connected to the piston.
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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) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |