GB2041150A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Elastic ring expanders
Assignee: Elastrator Co Ltd
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Filing: 1979-01-30
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Granted: —
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Expires: 1999-01-30
Abstract
Abstract The invention relates to a hand held pneumatically powered tool for expanding elastic rings. The expander includes four prongs 13, 14 which in use are passed through a ring and forced apart by a pneumatic ram 17 to stretch the ring into a square. By a reverse cam action in which rollers 9 engage two jaws (4) a pneumatic ram (17) opens the jaws (4) which each carry one prong (13). The second pair of prongs (14) are carried by two pivotally mounted arms (11) and are arranged to open and close with the jaws. The arms (11) are directly coupled to the ram so that when it acts to open the jaws it also slides the arms longitudinally along the jaws so that the arm prongs (14) are forced longitudinally apart from the corresponding jaw prongs (13). When a double acting pneumatic arm is used a tool mounted two- section two-way rocker valve directs compressed air to the appropriate side of the ram piston and allows air to be exhausted from the opposite side. <IMAGE>
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-22 21:09
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/0028; A; A22; A22B; A22B5/00; A22B5/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
An elastic ring expander comprising:
a hand held body,
a pneumatically actuated ram, the cylinder of which is integral with said body,
two jaw shaped members pivoted from one end of said body,
rollers associated with the ram piston which operatively contact the jaw members such that upon extension of the ram the jaw members open,
first ring engaging means dependent from the jaw members,
two arms coupled to said piston and each constrained to move laterally with a corresponding jaw member,
second ring engaging means dependent from said arms,
a control valve integral with said body portion which controls the flow of air to and from the ram cylinder,
an air hose connection which communicates with said valve,
and a valve actuator mounted on said body, the construction and arrangement being such that when the piston is retracted the ring engaging means are contiguous but when said ram is expanded the first and second ring engaging means moves apart laterally and the second ring engaging means move longitudinally apart from the first ring engaging means.
Claim 2
Dependent Claim
176 words
An elastic ring expander comprising:
a hand held body,
a pneumatically actuated ram, the cylinder of which is integral with said body,
two jaw shaped members pivoted from one end of said body,
rollers associated with the ram piston which operatively contact the jaw members such that upon extension of the ram the jaw members open,
first ring engaging means dependent from the jaw members,
two arms coupled to said piston and each constrained to move laterally with a corresponding jaw member,
second ring engaging means dependent from said arms,
a control valve integral with said body portion which controls the flow of air to and from the ram cylinder,
an air hose connection which communicates with said valve,
and a valve actuator mounted on said body, the construction and arrangement being such that when the piston is retracted the ring engaging means are contiguous but when said ram is expanded the first and second ring engaging means moves apart laterally and the second ring engaging means move longitudinally apart from the first ring engaging means.
Claim 3
Dependent Claim
76 words
An elastic ring expander according to claim 1 wherein said ram is double-acting and said valve is a two-section device mounted on the outside of the ram cylinder and communicating therewith, one valve section controlling the flow of air into and out of the cylinder rearward of the piston and the other flow forward of the piston, the valve sections being switched by angular rotation and rotated by a common shaft operated by a rocker lever.
Claim 4
Dependent Claim
178 words
An elastic ring expander according to claim 2- wherein said valve comprises a tube mounted on the exterior of the ram cylinder and parallel with the longitudinal axis thereof, said tube including two sets of longitudinally spaced apart inlet and exhaust ports which communication with opposite ends of the ram cylinder, a shaft located within said tube and free to rotate therein, said shaft provided with sealing means at each end, an air passageway in said shaft which leads air entering the valve to the annular cavity bounded by said sealing means and the inner and outer surfaces of tube and shaft respectively, elliptical sealing means encircling opposite ends of said shaft which each co-operate with an inlet and exhaust port pair so that when the shaft is fully rotated in one direction a first inlet port communicates with said cavity and a second exhaust port is open to ambient, whereas when the shaft is fully rotated in the opposite direction a second inlet port communicates with said cavity and a first exhaust port is open to ambient.
Claim 5
Dependent Claim
23 words
An elastic ring expander substantially as herein described with reference to and as illustrated by Figs. 1 and 2 of the accompanying drawings.
Claim 6
Dependent Claim
23 words
An elastic ring expander substantially as herein described with reference to and as illustrated by Figs. 1 and 2 of the accompanying drawings.
Claim 7
Dependent Claim
23 words
An elastic ring expander substantially as herein described with reference to and as illustrated by Figs. 3 and 4 of the accompanying drawings.
Claim 8
Dependent Claim
23 words
An elastic ring expander substantially as herein described with reference to and as illustrated by Figs. 3 and 4 of the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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