US3865520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary motor with fluid pressure biased vane
Assignee: Ingersoll Rand Co
•
Filing: 1973-06-01
•
Granted: 1975-02-11
•
Expires: 1993-06-01
Abstract
Abstract A vane-type air motor including a cylinder, opposite end walls and an eccentric rotor rotating within the cylinder and carrying radially moving vanes sliding in slots. Pockets are provided in the end walls for accumulating and storing substantial volumes of air under pressure to urge the vanes outwardly against the cylinder as they are traveling in portions of the cylinder between the high and low pressure portions of the motor chamber. Such pockets are separate from the high and low pressure portions of the motor chamber and are arranged to avoid interconnecting such pressure portions to prevent forming direct leakage paths between said pressure portions.
Inventors
- 👤 Leo Kramer
- 👤 Jr Harold E Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:51
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/10; F01C21/104; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F01C1/3441; F01C1/3442; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
A sliding vane fluid motor comprising: a cylinder including an opposed pair of spaced end walls; a rotor mounted to rotate in said cylinder between said end walls about an axis eccentric to the axis of said cylinder and having a series of vane slots extending longitudinally and outwardly toward the cylinder; a vane sliding in each of said vane slots for engaging the cylinder as the rotor rotates; a pair of angularly spaced kidney ports in one of the cylinder end walls located in spaced angular relationship about the axis of the rotor and communicating with the ends of the vane slots as the rotor rotates to supply fluid to and exhaust fluId from the vane slots; and at least one closed pocket provided in each of said end walls in opposed relationship and angularly located about the rotor axis between and spaced from both of said ports, said pocket being effective to trap a volume of fluid under pressure for urging the vanes outwardly as the vane slots travel past said pocket.
Claim 2
Dependent Claim
174 words
A sliding vane fluid motor comprising: a cylinder including an opposed pair of spaced end walls; a rotor mounted to rotate in said cylinder between said end walls about an axis eccentric to the axis of said cylinder and having a series of vane slots extending longitudinally and outwardly toward the cylinder; a vane sliding in each of said vane slots for engaging the cylinder as the rotor rotates; a pair of angularly spaced kidney ports in one of the cylinder end walls located in spaced angular relationship about the axis of the rotor and communicating with the ends of the vane slots as the rotor rotates to supply fluid to and exhaust fluId from the vane slots; and at least one closed pocket provided in each of said end walls in opposed relationship and angularly located about the rotor axis between and spaced from both of said ports, said pocket being effective to trap a volume of fluid under pressure for urging the vanes outwardly as the vane slots travel past said pocket.
Claim 3
Dependent Claim
217 words
A sliding vane rotary air motor comprising: a cylinder including an opposed pair of spaced end walls; a rotor mounted to rotate in said cylinder between said end walls about an axis eccentric to the axis of said cylinder and cooperating with said cylinder and end walls to form a fluid chamber having separate high and low pressure portions that are angularly spaced from each other around said rotor; at least one vane sliding in said rotor to project from the circumference of the rotor and engage said cylinder for sealing between said high and low pressure portions of said chamber; means for applying fluid pressure beneath said vane uring it outwardly against said cylinder while it is traveling through a portion of said chamber located between said high and low pressure portions of said chamber; and said means including a pocket provided in each of said end walls in opposed relationship and separated from both said high and low pressure portions of said chamber, said pocket being closed except for its opening in said each end wall and being effective to trap a volume of the pressure fluid in said chamber and to apply it to said vane to urge said vane outwardly as it travels between said high and low pressure portions of said chamber.
Claim 4
Dependent Claim
217 words
A sliding vane rotary air motor comprising: a cylinder including an opposed pair of spaced end walls; a rotor mounted to rotate in said cylinder between said end walls about an axis eccentric to the axis of said cylinder and cooperating with said cylinder and end walls to form a fluid chamber having separate high and low pressure portions that are angularly spaced from each other around said rotor; at least one vane sliding in said rotor to project from the circumference of the rotor and engage said cylinder for sealing between said high and low pressure portions of said chamber; means for applying fluid pressure beneath said vane uring it outwardly against said cylinder while it is traveling through a portion of said chamber located between said high and low pressure portions of said chamber; and said means including a pocket provided in each of said end walls in opposed relationship and separated from both said high and low pressure portions of said chamber, said pocket being closed except for its opening in said each end wall and being effective to trap a volume of the pressure fluid in said chamber and to apply it to said vane to urge said vane outwardly as it travels between said high and low pressure portions of said chamber.
Claim 5
Dependent Claim
33 words
The motor of claim 2 wherein: said pocket is located in the angular portion of said end wall relative to the axis of the rotor that includes the lap portion of said chamber.
Claim 6
Dependent Claim
36 words
The motor of claim 2 wherein: said pocket is located in the angular portion of said end wall relative to the axis of the rotor where the vane is substantially fully extended radially against said cylinder.
Claim 7
Dependent Claim
31 words
The motor of claim 2 wherein: said pocket is located in the angular portion of said end wall relative to the rotor between the inlet and exhaust ports of the motor.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |