Patent US3857515A successfully refreshed from Google Patents.
US3857515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid spray device
Assignee: Individual
•
Filing: 1974-04-04
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Granted: 1974-12-31
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Expires: 1994-04-04
Abstract
Abstract The disclosure concerns a mobile liquid spray device for applying insecticides, weed killers and fertilizers on vegetation and is specifically adapted as an attachment for conventional power lawnmowers of the rotary type. The liquid spray device may be a portable unit that may be detachably mounted on a lawnmower whereby a lawn may be mowed and simultaneously sprayed with an insecticide, a weed killer or a fertilizer, as required.
Inventors
- 👤 M Zennie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:24
CPC Classifications
A; A01; A01D; A01D43/00; A01D43/14; A01D2101/00; Y; Y10; Y10S; Y10S239/00; Y10S239/06; Y10S56/00; Y10S56/05
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
172 words
A liquid spray device comprising a wheeled ground vehicle, an elongated spray head mounted on the vehicle adjacent the ground and disposed normal to the path of travel of the vehicle, said spray head having an upper liquid reservoir and an air pressure chamber positioned below the reservoir, an engine on the vehicle, a blower mounted on the vehicle, power transmission means between the blower and the engine, and liquid tank on the vehicle positioned on a level above the spray head, a gravity flow hose connecting the tank and the liquid reservoir in the spray head, an air pressure conduit between the blower and the air pressure chamber, a number of longitudinally spaced apart nozzles in the bottom of the spray head, a liquid flow tube depending through the chamber and connecting each nozzle with the reservoir, air passageways connecting each nozzle with the air pressure chamber, valve means interposed between the reservoir and each liquid flow tube, and means uniformly controlling the flow of liquid through all of the tubes.
Claim 2
Dependent Claim
172 words
A liquid spray device comprising a wheeled ground vehicle, an elongated spray head mounted on the vehicle adjacent the ground and disposed normal to the path of travel of the vehicle, said spray head having an upper liquid reservoir and an air pressure chamber positioned below the reservoir, an engine on the vehicle, a blower mounted on the vehicle, power transmission means between the blower and the engine, and liquid tank on the vehicle positioned on a level above the spray head, a gravity flow hose connecting the tank and the liquid reservoir in the spray head, an air pressure conduit between the blower and the air pressure chamber, a number of longitudinally spaced apart nozzles in the bottom of the spray head, a liquid flow tube depending through the chamber and connecting each nozzle with the reservoir, air passageways connecting each nozzle with the air pressure chamber, valve means interposed between the reservoir and each liquid flow tube, and means uniformly controlling the flow of liquid through all of the tubes.
Claim 3
Dependent Claim
57 words
A liquid spray device as set forth in claim 1 wherein each nozzle consists of a block positioned in the bottom of the air pressure chamber and said liquid flow tube is embedded vertically in the block, and said air passageways are formed in the block in oppositely inclined positions with respect to the liquid flow tube.
Claim 4
Dependent Claim
42 words
A liquid spray device as set forth in claim 2 wherein each nozzle is downwardly opening and inset in the head and the air passageways and the liquid flow tube have their exit ports positioned in the top portion of the nozzle.
Claim 5
Dependent Claim
57 words
A liquid spray device as set forth in claim 3 wherein the exit port of the liquid flow tube is narrow and laterally elongated with respect to the longitudinal dimension of the spray head, and the exit ports of the air passageways are in laterally spaced positions in the block with respect to the liquid flow tube.
Claim 6
Dependent Claim
29 words
A liquid spray device as set forth in claim 4 wherein the operative nozzle distance above the ground is approximately half the effective width of the spray emitted therefrom.
Claim 7
Dependent Claim
85 words
A liquid spray device as set forth in claim 1 wherein a slide valve plate is interposed between the air pressure chamber and the liquid reservoir, said plate having a number of longitudinally spaced ports therethrough, each port communicating with a liquid flow tube, said valve means comprising a valve body slidable upon the plate adjacent each port, the means uniformly controlling liquid flow through the ports comprising a rod connecting all the valve bodies together for sliding movement, and control means for the rod.
Claim 8
Dependent Claim
42 words
A liquid spray device as set forth in claim 6 wherein each valve body has a longitudinally disposed sleeve thereon, the rod freely passes through each sleeve, and a restraining washer is fixed to the rod on each side of the sleeve.
Claim 9
Dependent Claim
34 words
A liquid spray device as set forth in claim 7 wherein spring hold down means is anchored on the slide plate and have free ends which slidably bear upon opposite sides of the sleeve.
Claim 10
Dependent Claim
35 words
A liquid spray device as set forth in claim 8 wherein the free ends of the hold down springs are connected by a cross over loop which slidably engages the sleeve on the valve body.
Claim 11
Dependent Claim
32 words
A liquid spray device as set forth in claim 6 wherein the control means is a rack connected to the rod, and a manually rotatable pinion is operatively associated with the rack.
Claim 12
Dependent Claim
40 words
A liquid spray device set forth in claim 10 wherein the rack is slidable in a channel member positioned upon the slide valve plate, said channel member having reduced ends limiting longitudinal movement of the rack in the channel member.
Claim 13
Dependent Claim
128 words
A liquid spray device as set forth in claim 12 wherein the mounting means positioning the spray head on the deck includes a first channel-shaped member positioned on the deck, a vertical pivot pin fixed to the first member and having pin portions extending above and below said member, a second channel-shaped member overlying the first member and having bearings in both pivot pin portions, means connecting the second member to the spray head, and a pair of counteracting, coiled springs encircling the pin portions, the outer end of each spring being fixed to a terminal end of a pin portion and the inner ends of the springs engaging the second member whereby the spray head is maintained in a resilient, laterally extended position on the lawnmower deck.
Claim 14
Dependent Claim
40 words
A liquid spray device as set forth in claim 13 wherein the first channel-shaped member is hingedly positioned on the deck for vertical swinging movement from an operative horizontal spray head positioned to a substantially vertical inoperative spray head position.
Claim 15
Dependent Claim
97 words
A liquid spray device as set forth in claim 12 wherein the clutch means comprises an engine driven vertical power shaft, a wheel keyed to the power shaft, a centrifugal blower pivotally mounted on the engine housing and having a coaxial driven member fixed to and depending therefrom into lateral association with the wheel, a flexible lever mounted on the housing and connected to the blower, a series of teeth fixed on the housing to receive the free end of the lever and maintain the power wheel and the driven member in resilient engaged or disengaged conditions.
Claim 16
Dependent Claim
35 words
A liquid spray device as set forth in claim 15 wherein the power wheel has a peripheral groove therein, and a tire of resilient material is mounted in the groove to engage the driven member.
Claim 17
Dependent Claim
92 words
A liquid spray device as set forth in claim 12 wherein the spray head has a detachable mounting means with the deck, thE blower is detachably mounted on the housing, and the frame resting upon the lawnmower deck and supporting the tank has a pair of longitudinally opposed legs, enlarged openings formed in the legs, a shelf and a side wall supported on the legs between the openings to receive and hold the blower and the spray head under the tank whereby the device can be transported and stored as a unit.
Claim 18
Dependent Claim
31 words
A liquid spray device as set forth in claim 17 wherein the tank has a pair of inverted U-shaped legs swiveled thereon which detachably engage lugs secured to the engine housing.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |