US3827601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand powered liquid dispenser of the metering type
Assignee: Individual
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Filing: 1973-03-23
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Granted: 1974-08-06
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Expires: 1993-03-23
Abstract
Abstract A hand powered liquid syringe or metering dispenser particularly for use in the veterinary medicine field comprises a pump mounted in a body having a transverse handle or grip. Standard bottles or other containers for vaccines or medicines may be mounted on a fitting secured to the body to supply the pump through a piercing tube or needle secured in the fitting. Air is supplied through the fitting to replace liquid removed from the bottle and the needle and air inlet are positioned in a manner to prevent air from being discharged from the bottle with the liquid. The pump is actuated by a squeezing action on a plunger when a handle is pressed toward the pistol grip. Check valves are provided in the inlet and outlet passages of the pump. Cannulas or other liquid discharge elements may be removed from the dispenser without requiring handling by the operator; this is accomplished by a trigger mechanism actuated by the operator''s hand while he is holding the pistol grip.
Inventors
- 👤 J Magrath
- 👤 L Hierath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:14
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/162; A61M5/178; A61M5/20; A61M5/204; A61M2005/1623
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
337 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; said liquid supply attaching means includes a detachable fitting mounted on said body for retaining a bottle of liquid on said body; means for mounting a bottle seal piercing tube on said body in position for piercing the seal of a bottle secured in said fitting whereby said tube provides a passage between the interior of the bottle and said cylinder; said supply attaching means including a boss on said body and surrounding said inlet, a nipple within said boss about said inlet, said piercing tube having a base for detachably engaging said nipple, means for adjustably attaching said fitting to said boss and said fitting having a passage therethrough about said piercing tube; said fitting having a shoulder about the passage therein for engaging said piercing tube and pressing it into position on said nipple and for sealing the upper portion of said passage from the portion about said base; means for admitting air to said upper portion of said passage; and, means extending along said piercing tube for conducting air from said upper portion to a bottle mounted on said fitting when liquid is removed from said bottle through said tube.
Claim 2
Dependent Claim
337 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; said liquid supply attaching means includes a detachable fitting mounted on said body for retaining a bottle of liquid on said body; means for mounting a bottle seal piercing tube on said body in position for piercing the seal of a bottle secured in said fitting whereby said tube provides a passage between the interior of the bottle and said cylinder; said supply attaching means including a boss on said body and surrounding said inlet, a nipple within said boss about said inlet, said piercing tube having a base for detachably engaging said nipple, means for adjustably attaching said fitting to said boss and said fitting having a passage therethrough about said piercing tube; said fitting having a shoulder about the passage therein for engaging said piercing tube and pressing it into position on said nipple and for sealing the upper portion of said passage from the portion about said base; means for admitting air to said upper portion of said passage; and, means extending along said piercing tube for conducting air from said upper portion to a bottle mounted on said fitting when liquid is removed from said bottle through said tube.
Claim 3
Dependent Claim
50 words
A liquid metering dispenser as set forth in claim 1 wherein said passage is of circular configuration and the upper end of said base is conical and engages the wall of the passage in said fitting along an annular sealing line when pressing said base into position on said nipple.
Claim 4
Dependent Claim
22 words
A liquid metering dispenser as set forth in claim 1 wherein said check valve for said inlet is mounted within said base.
Claim 5
Dependent Claim
46 words
A liquid metering dispenser as set forth in claim 1 wherein said fitting includes an upper seat about said passage for receiving the neck of an inverted bottle having its seal pierced by said tube and means for detachably securing an inverted bottle on said seat.
Claim 6
Dependent Claim
59 words
A liquid metering dispenser as set forth in claim 4 wherein said means for detachably securing a bottle on said seat comprises a plurality of locking members mounted in said fitting and a collar rotatably mounted on said fitting and positioned for engagement with and actuation of said locking members to move said members into engagement with the bottle.
Claim 7
Dependent Claim
58 words
A liquid metering dispenser as set forth in claim 1 including means for sealing said upper portion of said passage and a check valve for preventing the reverse flow of fluid from said upper portion of said passage through said air admitting means for minimizing reverse flow of fluid thrOugh said means for conducting air to the bottle.
Claim 8
Dependent Claim
82 words
A liquid metering dispenser as set forth in claim 4 wherein said locking members comprise pins slidable in said fitting toward and away from a bottle on said seat, said members including springs urging them toward said collar, said collar having cam surfaces on its inner face for moving said members inwardly for engaging a bottle neck on said seat and said members having sloping surfaces for engaging the neck flange of a bottle and urging the bottle downward against said seat.
Claim 9
Dependent Claim
279 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; said connection between said handle and said piston comprising a rod; closure means slidably engaging said rod and detachably secured to said body for closing the open end of said cylinder and for guiding said rod; stop means on said rod between said piston and said closure means and positioned for engagement with said closure means for determining the limit of outward movement of said piston; means for adjusting the position of said stop means to selectively determine the volume of liquid to be discharged from said cylinder, said adjusting means being accessible upon removal of said closure means from said body; and, said stop means comprising spaced holes in said rod and a clip for engaging the selected hole and for engaging said closure means in the selected maximum volume position of said piston.
Claim 10
Dependent Claim
279 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; said connection between said handle and said piston comprising a rod; closure means slidably engaging said rod and detachably secured to said body for closing the open end of said cylinder and for guiding said rod; stop means on said rod between said piston and said closure means and positioned for engagement with said closure means for determining the limit of outward movement of said piston; means for adjusting the position of said stop means to selectively determine the volume of liquid to be discharged from said cylinder, said adjusting means being accessible upon removal of said closure means from said body; and, said stop means comprising spaced holes in said rod and a clip for engaging the selected hole and for engaging said closure means in the selected maximum volume position of said piston.
Claim 11
Dependent Claim
261 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; means for the quick attaching of selected discharge fittings to the outlet from said body; and, means for quick detachment of discharge fittings from said dispenser while holding the handle thereof, said detaching means comprising: slip means for mounting a cannula or the like on the outlet of said body, a release member slidably mounted on said body and movable toward and away from the outlet end thereof, means for locking said release member in its position nearest said outlet end, and means adjacent said handle for releasing said lock means while holding said dispenser by said handle and for pushing the cannula out of engagement with said slip means to detach the cannula from said dispenser.
Claim 12
Dependent Claim
261 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; means for the quick attaching of selected discharge fittings to the outlet from said body; and, means for quick detachment of discharge fittings from said dispenser while holding the handle thereof, said detaching means comprising: slip means for mounting a cannula or the like on the outlet of said body, a release member slidably mounted on said body and movable toward and away from the outlet end thereof, means for locking said release member in its position nearest said outlet end, and means adjacent said handle for releasing said lock means while holding said dispenser by said handle and for pushing the cannula out of engagement with said slip means to detach the cannula from said dispenser.
Claim 13
Dependent Claim
71 words
A liquid metering dispenser as set forth in claim 9 and a plurality of said cannulas, each cOmprising a tube having thereon a transverse disc for limiting the distance of penetration of the tube into a cavity to be treated whereby contact of the dispenser body and a treated individual is prevented and the plurality of cannulas may be used each in turn on separate individuals without contamination from previous treatments.
Claim 14
Dependent Claim
297 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; said liquid supply attaching means includes a detachable fitting mounted on said body for retaining a bottle of liquid on said body; means for mounting a bottle seal piercing tube on said body in position for piercing the seal of a bottle secured in said fitting whereby said tube provides a passage between the interior of the bottle and said cylinder; said supply attaching means including a boss on said body and surrounding said inlet, and a nipple within said boss about said inlet, said piercing tube having a base for detachably engaging said nipple, means for adjustably attaching said fitting to said boss and said fitting having a passage therethrough about said piercing tube; and, said fitting having a shoulder about the passage therein for engaging said piercing tube and pressing it into position on said nipple and for sealing the upper portion of said passage from the portion about said base.
Claim 15
Dependent Claim
297 words
A liquid metering dispenser comprising: a block having a cylinder open at one end and closed at the other; a piston slidable in said cylinder between minimum and maximum cylinder volume positions; means for attaching a liquid supply to said body and including an inlet for delivering liquid to said cylinder adjacent the closed end thereof; passage means for discharging liquid from said cylinder; a first handle for holding said body in the hand of an operator; a second handle connected to said piston and positioned for cooperation with said first handle for squeezing by hand to move said piston to discharge liquid from said cylinder, said second handle being biased to a position away from said body to urge said piston toward its maximum volume position; check valves for preventing reverse passage of liquid through said inlet and through said discharge passage means; said liquid supply attaching means includes a detachable fitting mounted on said body for retaining a bottle of liquid on said body; means for mounting a bottle seal piercing tube on said body in position for piercing the seal of a bottle secured in said fitting whereby said tube provides a passage between the interior of the bottle and said cylinder; said supply attaching means including a boss on said body and surrounding said inlet, and a nipple within said boss about said inlet, said piercing tube having a base for detachably engaging said nipple, means for adjustably attaching said fitting to said boss and said fitting having a passage therethrough about said piercing tube; and, said fitting having a shoulder about the passage therein for engaging said piercing tube and pressing it into position on said nipple and for sealing the upper portion of said passage from the portion about said base.
Claim 16
Dependent Claim
114 words
A liquid metering dispenser as set forth in claim 11 wherein: said connection between said handle and said piston comprises a rod, closure means slidably engaging said rod and detachably secured to said body for closing the open end of said cylinder and for guiding said rod, stop means on said rod between said piston and said closure means and positioned for engagement with said closure means for determining the limit of outward movement of said piston, and means for adjusting the position of said stop means to selectively determine the volume of liquid to be discharged from said cylinder, said adjusting means being accessible upon removal of said closure means from said body.
Claim 17
Dependent Claim
34 words
A liquid metering dispenser as set forth in claim 11 including means for attaching a standard hypodermic needle at the outlet of said body whereby said dispenser may be utilized as a hypodermic syringe.
Claim 18
Dependent Claim
41 words
A liquid metering dispenser as set forth in claim 13 wherein said mounting means for said piercing tube is of a size different from that for a standard hypodermic needle whereby said standard needle and said piercing tube are not interchangeable.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |