Patent US4088219A successfully refreshed from Google Patents.
US4088219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passenger conveyors
Assignee: Dunlop Ltd
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Filing: 1976-06-15
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Granted: 1978-05-09
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Expires: 1996-06-15
Abstract
Abstract A comb plate device for a passenger conveyor comprising a longitudinally extending mounting plate for mounting transversely of a conveyor, a comb plate pivotally mounted on the mounting plate about an axis parallel to the said mounting plate and fluid-sensing means to detect pivotal movement of the comb plate when in use on a conveyor.
Inventors
- 👤 Keith Binns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:17
CPC Classifications
B; B66; B66B; B66B29/00; B66B29/02; B66B29/06
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
97 words
A comb plate device for stopping a passenger conveyor upon detection of potentially damaging condition on the conveyor comprising a longitudinally extending mounting plate for mounting transversely of a conveyor, a comb plate pivotally mounted on the mounting plate about an axis parallel to the said mounting plate and fluid-sensing means to detect pivotal movement of the comb plate away from the conveyor when in use on a conveyor said fluid-sensing means comprising a detector positioned in a vacuum line to detect opening of an aperture in the fluid-sensing means on pivotal movement of the comb plate.
Claim 2
Dependent Claim
97 words
A comb plate device for stopping a passenger conveyor upon detection of potentially damaging condition on the conveyor comprising a longitudinally extending mounting plate for mounting transversely of a conveyor, a comb plate pivotally mounted on the mounting plate about an axis parallel to the said mounting plate and fluid-sensing means to detect pivotal movement of the comb plate away from the conveyor when in use on a conveyor said fluid-sensing means comprising a detector positioned in a vacuum line to detect opening of an aperture in the fluid-sensing means on pivotal movement of the comb plate.
Claim 3
Dependent Claim
31 words
A comb plate device according to claim 1 wherein the fluid-sensing means utilizes air and comb plate movement is sensed by a flow detector provided in an associated air supply line.
Claim 4
Dependent Claim
54 words
A comb plate device according to claim 1 wherein the vacuum line is secured to the mounting plate and said aperture co-operates with sealing means associated with the comb plate to seal the aperture when in normal operation, the aperture being unsealed when the comb plate is pivoted by an obstruction on the conveyor.
Claim 5
Dependent Claim
40 words
A comb plate device according to claim 3 wherein the sealing means comprises a resilient compressible seal secured to an adjacent surface of the comb plate and arranged to extend across the aperture to seal the aperture in normal operation.
Claim 6
Dependent Claim
27 words
A comb plate device according to claim 3 wherein the vacuum line is attached to the mounting plate beneath the comb plate to extend across the conveyor.
Claim 7
Dependent Claim
36 words
A comb plate device according to claim 1 wherein the comb plate is pivoted on a pivot bar secured to the mounting plate adjacent the comb edge opposite to the edge for sweeping the conveyor surface.
Claim 8
Dependent Claim
43 words
A comb plate device according to claim 1 wherein the comb plate is secured to the mounting plate by a bolt, clearance being provided between the bolt and the comb plate to allow the comb plate to pivot relative to the mounting plate.
Claim 9
Dependent Claim
27 words
A comb plate device according to claim 7 wherein spring means is provided to hold the comb plate against the fluid-sensing means and seal an aperture therein.
Claim 10
Dependent Claim
27 words
A comb plate device according to claim 8 wherein the spring comprises an annular spring disc positioned between the head of the bolt and the comb plate.
Claim 11
Dependent Claim
71 words
A comb plate device according to claim 6 wherein a portion of the comb edge opposite to the edge for sweeping the conveyor surface is arranged to abut an end face provided on the mounting plate the abutment of the comb plate and end face serving to provide limited pivotal movement so that an excessive load applied to the sweeping edge of the comb plate does not over-stress the comb plate.
Claim 12
Dependent Claim
35 words
A comb plate device according to claim 1 wherein the comb plate is sub-divided into a series of segments arranged side-by-side in edge-to-edge contact across the conveyor, each segment being associated with fluid sensing means.
Claim 13
Dependent Claim
23 words
A comb plate device according to claim 1 wherein the comb is of the multi-pointed variety for use with a grooved conveyor surface.
Claim 14
Dependent Claim
18 words
A comb plate according to claim 12 wherein the points or teeth are integral with the comb plate.
Claim 15
Dependent Claim
19 words
A comb plate device according to claim 12 wherein the points or teeth are separate from the comb plate.
Claim 16
Dependent Claim
97 words
A comb plate device for stopping a passenger conveyor upon detection of potentially damaging condition on the conveyor comprising a longitudinally extending mounting plate for mounting transversely of a conveyor, a comb plate pivotally mounted on the mounting plate about an axis parallel to the said mounting plate and fluid-sensing means to detect pivotal movement of the comb plate away from the conveyor when in use on a conveyor and a pressure loss detector in an associated air supply line to detect opening of an aperture in the fluid-sensing means on pivotal movement of the comb plate.
Claim 17
Dependent Claim
97 words
A comb plate device for stopping a passenger conveyor upon detection of potentially damaging condition on the conveyor comprising a longitudinally extending mounting plate for mounting transversely of a conveyor, a comb plate pivotally mounted on the mounting plate about an axis parallel to the said mounting plate and fluid-sensing means to detect pivotal movement of the comb plate away from the conveyor when in use on a conveyor and a pressure loss detector in an associated air supply line to detect opening of an aperture in the fluid-sensing means on pivotal movement of the comb plate.
Claim 18
Dependent Claim
55 words
A comb plate device according to claim 15 wherein the air supply line is secured to the mounting plate and said aperture co-operates with sealing means associated with the comb plate to seal the aperture when in normal operation, the aperture being unsealed when the comb plate is pivoted by an obstruction on the conveyor.
Claim 19
Dependent Claim
40 words
A comb plate device according to claim 16 wherein the sealing means comprises a resilient compressible seal secured to an adjacent surface of the comb plate and arranged to extend across the aperture to seal the aperture in normal operation.
Claim 20
Dependent Claim
28 words
A comb plate device according to claim 16 wherein the air supply line is attached to the mounting plate beneath the comb plate to extend across the conveyor.
Claim 21
Dependent Claim
36 words
A comb plate device according to claim 15 wherein the comb plate is pivoted on a pivot bar secured to the mounting plate adjacent the comb edge opposite to the edge for sweeping the conveyor surface.
Claim 22
Dependent Claim
43 words
A comb plate device according to claim 15 wherein the comb plate is secured to the mounting plate by a bolt, clearance being provided between the bolt and the comb plate to allow the comb plate to pivot relative to the mounting plate.
Claim 23
Dependent Claim
27 words
A comb plate device according to claim 20 wherein spring means is provided to hold the comb plate against the fluid-sensing means and seal the aperture therein.
Claim 24
Dependent Claim
27 words
A comb plate device according to claim 21 wherein the spring comprises an annular spring disc positioned between the head of the bolt and the comb plate.
Claim 25
Dependent Claim
71 words
A comb plate device according to claim 19 wherein a portion of the comb edge opposite to the edge for sweeping the conveyor surface is arranged to abut an end face provided on the mounting plate the abutment of the comb plate and end face serving to provide limited pivoted movement so that an excessive load applied to the sweeping edge of the comb plate does not over-stress the comb plate.
Claim 26
Dependent Claim
37 words
A comb plate device according to claim 15 wherein the comb plate is sub-divided into a series of segments arranged side-by-side in edge-to-edge contact across the conveyor, each segment being associated with means to cause pressure loss.
Claim 27
Dependent Claim
23 words
A comb plate device according to claim 15 wherein the comb is of a multi-pointed variety for use with a grooved conveyor surface.
Claim 28
Dependent Claim
19 words
A comb plate device according to claim 25 wherein the points or teeth are integral with the comb plate.
Claim 29
Dependent Claim
19 words
A comb plate device according to claim 25 wherein the points or teeth are separate from the comb plate.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |