US3597131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear pump with travel limited tied wear block
Assignee: Colt Industries Operating Corp
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Filing: 1969-09-24
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Granted: 1971-08-03
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Expires: 1989-09-24
Abstract
Abstract A three-gear pump for pumping nonabrasive fluids having a center gear and two outer gears intermeshing with the center gear. Two pivotable and movable peripheral tooth-sealing members having respective arcuate wiping surfaces engage each of the outer gears and the center gear. The sealing members are positioned adjacent the outlets of the pump. The sealing members are capable of only limited movement toward the gears due to respective stop elements integral with the pump housing and respective contact elements integral with the sealing members adapted to engage the stop elements. The sealing members are also pivotable about an axis transverse to the axes of rotation of the gears. As the sealing members wear due to contact with the gear teeth, the contact elements will respectively advance toward the stop elements until they contact one another to transmit the load on the sealing members to the housing.
Inventors
- 👤 John J Schofield
- 👤 Charles W Grennan
- 👤 Le Roy A Difford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0007; F04C15/0019
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
198 words
In a gear pump, the combination comprising: a housing having at least one inlet, at least one outlet, and a pumping cavity therein; at least two intermeshing gears mounted for rotation within said pumping cavity to pump fluid from said inlet toward said outlet; at least one peripheral tooth-sealing member mounted in said pumping cavity in a first position for eventual movement between said first position and a second position during the break-in period, said sealing member having two arcuate wiping surfaces in contact with the respective peripheries of said gears; a stop element integral with said housing disposed within said cavity; a contact element integral with said sealing member, said contact element being spaced from said stop element in said first position, and adapted to contact said stop element in said second position, means urging the sealing member toward said gears such that said wiping surfaces are in firm contact with said gear peripheries in said first position and said elements are in firm engagement in said second position, and whereby sufficient wear of said wiping surfaces produced by rotation of said gears Will cause said member to advance from said first position to said second position.
Claim 2
Dependent Claim
198 words
In a gear pump, the combination comprising: a housing having at least one inlet, at least one outlet, and a pumping cavity therein; at least two intermeshing gears mounted for rotation within said pumping cavity to pump fluid from said inlet toward said outlet; at least one peripheral tooth-sealing member mounted in said pumping cavity in a first position for eventual movement between said first position and a second position during the break-in period, said sealing member having two arcuate wiping surfaces in contact with the respective peripheries of said gears; a stop element integral with said housing disposed within said cavity; a contact element integral with said sealing member, said contact element being spaced from said stop element in said first position, and adapted to contact said stop element in said second position, means urging the sealing member toward said gears such that said wiping surfaces are in firm contact with said gear peripheries in said first position and said elements are in firm engagement in said second position, and whereby sufficient wear of said wiping surfaces produced by rotation of said gears Will cause said member to advance from said first position to said second position.
Claim 3
Dependent Claim
44 words
The combination, as defined in claim 1, wherein said stop element comprises: a fulcrum adapted to contact said contact element in said second position such that said sealing member may pivot thereabout on an axis transverse to the axes of rotation of said gears.
Claim 4
Dependent Claim
69 words
The combination, as defined in claim 1, wherein said sealing member comprises: a main portion to engage said gears; a support portion integral with said main portion to operatively interconnect said main portion and said housing, said support portion comprising said contact element; and a pivot interconnecting said portions such that said sealing member may pivot thereabout in an axis transverse to the axes of rotation of said gears.
Claim 5
Dependent Claim
29 words
The combination, as defined in claim 1, wherein said sealing member comprises sealing elements having vertically extending inner surfaces, and wherein means are provided to structurally interconnect said surfaces.
Claim 6
Dependent Claim
18 words
The combination, as defined in claim 1, wherein said sealing member at least partially comprises a bronze alloy.
Claim 7
Dependent Claim
218 words
In a gear pump, the combination comprising: a housing having at least one inlet, at least one outlet, and a pumping cavity therein; at least two intermeshing gears mounted for rotation within said pumping cavity to pump fluid from said inlet toward said outlet; at least one peripheral tooth-sealing member mounted in said pumping cavity adjacent said outlet for movement toward and away from said gears, the said member having two arcuate wiping surfaces at least substantially engaging the respective peripheries of said gears; at least one side member disposed in said pumping cavity such that it is adapted to contact a lateral side of said sealing member for urging the other lateral side of said sealing member into sealing engagement with the housing, said housing, gears, sealing member and side member sealingly enclosing a high pressure discharge chamber; a pivot engaging said sealing member such that said sealing member may pivot thereabout on an axis transverse to the axes of rotation of said gears; means urging said sealing member into engagement with said pivot, said pivot serving to limit the movement of said sealing member toward said gears; means integral with said pivot operatively interconnecting said pivot and said housing such that the load exerted on said pivot by said sealing member is transmitted to said housing.
Claim 8
Dependent Claim
218 words
In a gear pump, the combination comprising: a housing having at least one inlet, at least one outlet, and a pumping cavity therein; at least two intermeshing gears mounted for rotation within said pumping cavity to pump fluid from said inlet toward said outlet; at least one peripheral tooth-sealing member mounted in said pumping cavity adjacent said outlet for movement toward and away from said gears, the said member having two arcuate wiping surfaces at least substantially engaging the respective peripheries of said gears; at least one side member disposed in said pumping cavity such that it is adapted to contact a lateral side of said sealing member for urging the other lateral side of said sealing member into sealing engagement with the housing, said housing, gears, sealing member and side member sealingly enclosing a high pressure discharge chamber; a pivot engaging said sealing member such that said sealing member may pivot thereabout on an axis transverse to the axes of rotation of said gears; means urging said sealing member into engagement with said pivot, said pivot serving to limit the movement of said sealing member toward said gears; means integral with said pivot operatively interconnecting said pivot and said housing such that the load exerted on said pivot by said sealing member is transmitted to said housing.
Claim 9
Dependent Claim
25 words
The combination, as defined in claim 6, wherein said sealing member is made of a bronze alloy and said gears are made of tool steel.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |